initial state (xorg-server 1.10.2)

15 files changed, 10212 insertions, 0 deletions

diff --git a/exa/Makefile.am b/exa/Makefile.am
new file mode 100644
index 0000000..8b759cd
--- /dev/null
+++ b/exa/Makefile.am
@@ -0,0 +1,30 @@
+noinst_LTLIBRARIES = libexa.la
+
+# Override these since EXA doesn't need them and the needed files aren't
+# built (in hw/xfree86/os-support/solaris) until after EXA is built
+SOLARIS_ASM_CFLAGS=""
+
+if XORG
+sdk_HEADERS = exa.h
+endif
+
+INCLUDES = \
+	$(XORG_INCS) \
+	-I$(srcdir)/../miext/cw
+
+AM_CFLAGS = $(XORG_CFLAGS) $(DIX_CFLAGS)
+
+libexa_la_SOURCES = \
+	exa.c \
+	exa.h \
+	exa_classic.c \
+	exa_migration_classic.c \
+	exa_driver.c \
+	exa_mixed.c \
+	exa_migration_mixed.c \
+	exa_accel.c \
+	exa_glyphs.c \
+	exa_offscreen.c \
+	exa_render.c \
+	exa_priv.h \
+	exa_unaccel.c
diff --git a/exa/Makefile.in b/exa/Makefile.in
new file mode 100644
index 0000000..df5abcd
--- /dev/null
+++ b/exa/Makefile.in
@@ -0,0 +1,782 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = exa
+DIST_COMMON = $(am__sdk_HEADERS_DIST) $(srcdir)/Makefile.am \
+	$(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/ac_define_dir.m4 \
+	$(top_srcdir)/m4/ax_tls.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/include/do-not-use-config.h \
+	$(top_builddir)/include/xorg-server.h \
+	$(top_builddir)/include/dix-config.h \
+	$(top_builddir)/include/xorg-config.h \
+	$(top_builddir)/include/xkb-config.h \
+	$(top_builddir)/include/xwin-config.h \
+	$(top_builddir)/include/kdrive-config.h \
+	$(top_builddir)/include/version-config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LTLIBRARIES = $(noinst_LTLIBRARIES)
+libexa_la_LIBADD =
+am_libexa_la_OBJECTS = exa.lo exa_classic.lo exa_migration_classic.lo \
+	exa_driver.lo exa_mixed.lo exa_migration_mixed.lo exa_accel.lo \
+	exa_glyphs.lo exa_offscreen.lo exa_render.lo exa_unaccel.lo
+libexa_la_OBJECTS = $(am_libexa_la_OBJECTS)
+AM_V_lt = $(am__v_lt_$(V))
+am__v_lt_ = $(am__v_lt_$(AM_DEFAULT_VERBOSITY))
+am__v_lt_0 = --silent
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)/include
+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_$(V))
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+am__v_CC_0 = @echo "  CC    " $@;
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+am__v_at_0 = @
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_$(V))
+am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY))
+am__v_CCLD_0 = @echo "  CCLD  " $@;
+AM_V_GEN = $(am__v_GEN_$(V))
+am__v_GEN_ = $(am__v_GEN_$(AM_DEFAULT_VERBOSITY))
+am__v_GEN_0 = @echo "  GEN   " $@;
+SOURCES = $(libexa_la_SOURCES)
+DIST_SOURCES = $(libexa_la_SOURCES)
+am__sdk_HEADERS_DIST = exa.h
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
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+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
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+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__installdirs = "$(DESTDIR)$(sdkdir)"
+HEADERS = $(sdk_HEADERS)
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+HAL_CFLAGS = @HAL_CFLAGS@
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+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PCIACCESS_CFLAGS = @PCIACCESS_CFLAGS@
+PCIACCESS_LIBS = @PCIACCESS_LIBS@
+PCI_TXT_IDS_PATH = @PCI_TXT_IDS_PATH@
+PERL = @PERL@
+PIXMAN_CFLAGS = @PIXMAN_CFLAGS@
+PIXMAN_LIBS = @PIXMAN_LIBS@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+PROJECTROOT = @PROJECTROOT@
+RANLIB = @RANLIB@
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+SDK_REQUIRED_MODULES = @SDK_REQUIRED_MODULES@
+SED = @SED@
+SELINUX_CFLAGS = @SELINUX_CFLAGS@
+SELINUX_LIBS = @SELINUX_LIBS@
+SERVER_MISC_CONFIG_PATH = @SERVER_MISC_CONFIG_PATH@
+SET_MAKE = @SET_MAKE@
+SHA1_CFLAGS = @SHA1_CFLAGS@
+SHA1_LIBS = @SHA1_LIBS@
+SHELL = @SHELL@
+
+# Override these since EXA doesn't need them and the needed files aren't
+# built (in hw/xfree86/os-support/solaris) until after EXA is built
+SOLARIS_ASM_CFLAGS = ""
+SOLARIS_INOUT_ARCH = @SOLARIS_INOUT_ARCH@
+STRIP = @STRIP@
+STYLESHEET_SRCDIR = @STYLESHEET_SRCDIR@
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+VENDOR_NAME_SHORT = @VENDOR_NAME_SHORT@
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+XDMX_LIBS = @XDMX_LIBS@
+XDMX_SYS_LIBS = @XDMX_SYS_LIBS@
+XEPHYR_CFLAGS = @XEPHYR_CFLAGS@
+XEPHYR_INCS = @XEPHYR_INCS@
+XEPHYR_LIBS = @XEPHYR_LIBS@
+XF86CONFIGDIR = @XF86CONFIGDIR@
+XF86CONFIGFILE = @XF86CONFIGFILE@
+XF86VIDMODE_CFLAGS = @XF86VIDMODE_CFLAGS@
+XF86VIDMODE_LIBS = @XF86VIDMODE_LIBS@
+XKB_BASE_DIRECTORY = @XKB_BASE_DIRECTORY@
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+__XCONFIGDIR__ = @__XCONFIGDIR__@
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+top_srcdir = @top_srcdir@
+noinst_LTLIBRARIES = libexa.la
+@XORG_TRUE@sdk_HEADERS = exa.h
+INCLUDES = \
+	$(XORG_INCS) \
+	-I$(srcdir)/../miext/cw
+
+AM_CFLAGS = $(XORG_CFLAGS) $(DIX_CFLAGS)
+libexa_la_SOURCES = \
+	exa.c \
+	exa.h \
+	exa_classic.c \
+	exa_migration_classic.c \
+	exa_driver.c \
+	exa_mixed.c \
+	exa_migration_mixed.c \
+	exa_accel.c \
+	exa_glyphs.c \
+	exa_offscreen.c \
+	exa_render.c \
+	exa_priv.h \
+	exa_unaccel.c
+
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign exa/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign exa/Makefile
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+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
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+	$(AM_V_CCLD)$(LINK)  $(libexa_la_OBJECTS) $(libexa_la_LIBADD) $(LIBS)
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+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exa.Plo@am__quote@
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+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exa_unaccel.Plo@am__quote@
+
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+	@$(NORMAL_INSTALL)
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+	@list='$(sdk_HEADERS)'; test -n "$(sdkdir)" || list=; \
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+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(am__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_HEADER) $$files '$(DESTDIR)$(sdkdir)'"; \
+	  $(INSTALL_HEADER) $$files "$(DESTDIR)$(sdkdir)" || exit $$?; \
+	done
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+uninstall-sdkHEADERS:
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+	test -n "$$files" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(sdkdir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(sdkdir)" && rm -f $$files
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+	mkid -fID $$unique
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+	here=`pwd`; \
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
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+	      $$unique; \
+	  fi; \
+	fi
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+		$(TAGS_FILES) $(LISP)
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+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+distdir: $(DISTFILES)
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+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
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+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
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+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(HEADERS)
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+	for dir in "$(DESTDIR)$(sdkdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
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+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
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+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
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+	-rm -rf ./$(DEPDIR)
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+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/exa/exa.c b/exa/exa.c
new file mode 100644
index 0000000..a4e294a
--- /dev/null
+++ b/exa/exa.c
@@ -0,0 +1,1158 @@
+/*
+ * Copyright © 2001 Keith Packard
+ *
+ * Partly based on code that is Copyright © The XFree86 Project Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/** @file
+ * This file covers the initialization and teardown of EXA, and has various
+ * functions not responsible for performing rendering, pixmap migration, or
+ * memory management.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+DevPrivateKeyRec exaScreenPrivateKeyRec;
+DevPrivateKeyRec exaPixmapPrivateKeyRec;
+DevPrivateKeyRec exaGCPrivateKeyRec;
+
+#ifdef MITSHM
+static ShmFuncs exaShmFuncs = { NULL, NULL };
+#endif
+
+/**
+ * exaGetPixmapOffset() returns the offset (in bytes) within the framebuffer of
+ * the beginning of the given pixmap.
+ *
+ * Note that drivers are free to, and often do, munge this offset as necessary
+ * for handing to the hardware -- for example, translating it into a different
+ * aperture.  This function may need to be extended in the future if we grow
+ * support for having multiple card-accessible offscreen, such as an AGP memory
+ * pool alongside the framebuffer pool.
+ */
+unsigned long
+exaGetPixmapOffset(PixmapPtr pPix)
+{
+    ExaScreenPriv (pPix->drawable.pScreen);
+    ExaPixmapPriv (pPix);
+
+    return (CARD8 *)pExaPixmap->fb_ptr - pExaScr->info->memoryBase;
+}
+
+void *
+exaGetPixmapDriverPrivate(PixmapPtr pPix)
+{
+    ExaPixmapPriv(pPix);
+
+    return pExaPixmap->driverPriv;
+}
+
+/**
+ * exaGetPixmapPitch() returns the pitch (in bytes) of the given pixmap.
+ *
+ * This is a helper to make driver code more obvious, due to the rather obscure
+ * naming of the pitch field in the pixmap.
+ */
+unsigned long
+exaGetPixmapPitch(PixmapPtr pPix)
+{
+    return pPix->devKind;
+}
+
+/**
+ * exaGetPixmapSize() returns the size in bytes of the given pixmap in video
+ * memory. Only valid when the pixmap is currently in framebuffer.
+ */
+unsigned long
+exaGetPixmapSize(PixmapPtr pPix)
+{
+    ExaPixmapPrivPtr pExaPixmap;
+
+    pExaPixmap = ExaGetPixmapPriv(pPix);
+    if (pExaPixmap != NULL)
+	return pExaPixmap->fb_size;
+    return 0;
+}
+
+/**
+ * exaGetDrawablePixmap() returns a backing pixmap for a given drawable.
+ *
+ * @param pDrawable the drawable being requested.
+ *
+ * This function returns the backing pixmap for a drawable, whether it is a
+ * redirected window, unredirected window, or already a pixmap.  Note that
+ * coordinate translation is needed when drawing to the backing pixmap of a
+ * redirected window, and the translation coordinates are provided by calling
+ * exaGetOffscreenPixmap() on the drawable.
+ */
+PixmapPtr
+exaGetDrawablePixmap(DrawablePtr pDrawable)
+{
+     if (pDrawable->type == DRAWABLE_WINDOW)
+	return pDrawable->pScreen->GetWindowPixmap ((WindowPtr) pDrawable);
+     else
+	return (PixmapPtr) pDrawable;
+}
+
+/**
+ * Sets the offsets to add to coordinates to make them address the same bits in
+ * the backing drawable. These coordinates are nonzero only for redirected
+ * windows.
+ */
+void
+exaGetDrawableDeltas (DrawablePtr pDrawable, PixmapPtr pPixmap,
+		      int *xp, int *yp)
+{
+#ifdef COMPOSITE
+    if (pDrawable->type == DRAWABLE_WINDOW) {
+	*xp = -pPixmap->screen_x;
+	*yp = -pPixmap->screen_y;
+	return;
+    }
+#endif
+
+    *xp = 0;
+    *yp = 0;
+}
+
+/**
+ * exaPixmapDirty() marks a pixmap as dirty, allowing for
+ * optimizations in pixmap migration when no changes have occurred.
+ */
+void
+exaPixmapDirty (PixmapPtr pPix, int x1, int y1, int x2, int y2)
+{
+    BoxRec box;
+    RegionRec region;
+
+    box.x1 = max(x1, 0);
+    box.y1 = max(y1, 0);
+    box.x2 = min(x2, pPix->drawable.width);
+    box.y2 = min(y2, pPix->drawable.height);
+
+    if (box.x1 >= box.x2 || box.y1 >= box.y2)
+	return;
+
+    RegionInit(&region, &box, 1);
+    DamageDamageRegion(&pPix->drawable, &region);
+    RegionUninit(&region);
+}
+
+static int
+exaLog2(int val)
+{
+    int bits;
+
+    if (val <= 0)
+	return 0;
+    for (bits = 0; val != 0; bits++)
+	val >>= 1;
+    return bits - 1;
+}
+
+void
+exaSetAccelBlock(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
+                 int w, int h, int bpp)
+{
+    pExaPixmap->accel_blocked = 0;
+
+    if (pExaScr->info->maxPitchPixels) {
+        int max_pitch = pExaScr->info->maxPitchPixels * bits_to_bytes(bpp);
+
+        if (pExaPixmap->fb_pitch > max_pitch)
+            pExaPixmap->accel_blocked |= EXA_RANGE_PITCH;
+    }
+
+    if (pExaScr->info->maxPitchBytes &&
+        pExaPixmap->fb_pitch > pExaScr->info->maxPitchBytes)
+        pExaPixmap->accel_blocked |= EXA_RANGE_PITCH;
+
+    if (w > pExaScr->info->maxX)
+        pExaPixmap->accel_blocked |= EXA_RANGE_WIDTH;
+
+    if (h > pExaScr->info->maxY)
+        pExaPixmap->accel_blocked |= EXA_RANGE_HEIGHT;
+}
+
+void
+exaSetFbPitch(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
+              int w, int h, int bpp)
+{
+    if (pExaScr->info->flags & EXA_OFFSCREEN_ALIGN_POT && w != 1)
+        pExaPixmap->fb_pitch = bits_to_bytes((1 << (exaLog2(w - 1) + 1)) * bpp);
+    else
+        pExaPixmap->fb_pitch = bits_to_bytes(w * bpp);
+
+    pExaPixmap->fb_pitch = EXA_ALIGN(pExaPixmap->fb_pitch,
+                                     pExaScr->info->pixmapPitchAlign);
+}
+
+/**
+ * Returns TRUE if the pixmap is not movable.  This is the case where it's a
+ * pixmap which has no private (almost always bad) or it's a scratch pixmap created by
+ * some X Server internal component (the score says it's pinned).
+ */
+Bool
+exaPixmapIsPinned (PixmapPtr pPix)
+{
+    ExaPixmapPriv (pPix);
+
+    if (pExaPixmap == NULL)
+	EXA_FatalErrorDebugWithRet(("EXA bug: exaPixmapIsPinned was called on a non-exa pixmap.\n"), TRUE);
+
+    return pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED;
+}
+
+/**
+ * exaPixmapHasGpuCopy() is used to determine if a pixmap is in offscreen
+ * memory, meaning that acceleration could probably be done to it, and that it
+ * will need to be wrapped by PrepareAccess()/FinishAccess() when accessing it
+ * with the CPU.
+ *
+ * Note that except for UploadToScreen()/DownloadFromScreen() (which explicitly
+ * deal with moving pixmaps in and out of system memory), EXA will give drivers
+ * pixmaps as arguments for which exaPixmapHasGpuCopy() is TRUE.
+ *
+ * @return TRUE if the given drawable is in framebuffer memory.
+ */
+Bool
+exaPixmapHasGpuCopy(PixmapPtr pPixmap)
+{
+    ScreenPtr	pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return FALSE;
+
+    return (*pExaScr->pixmap_has_gpu_copy)(pPixmap);
+}
+
+/**
+ * exaDrawableIsOffscreen() is a convenience wrapper for exaPixmapHasGpuCopy().
+ */
+Bool
+exaDrawableIsOffscreen (DrawablePtr pDrawable)
+{
+    return exaPixmapHasGpuCopy (exaGetDrawablePixmap (pDrawable));
+}
+
+/**
+ * Returns the pixmap which backs a drawable, and the offsets to add to
+ * coordinates to make them address the same bits in the backing drawable.
+ */
+PixmapPtr
+exaGetOffscreenPixmap (DrawablePtr pDrawable, int *xp, int *yp)
+{
+    PixmapPtr	pPixmap = exaGetDrawablePixmap (pDrawable);
+
+    exaGetDrawableDeltas (pDrawable, pPixmap, xp, yp);
+
+    if (exaPixmapHasGpuCopy (pPixmap))
+	return pPixmap;
+    else
+	return NULL;
+}
+
+/**
+ * Returns TRUE if the pixmap GPU copy is being accessed.
+ */
+Bool
+ExaDoPrepareAccess(PixmapPtr pPixmap, int index)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv (pScreen);
+    ExaPixmapPriv(pPixmap);
+    Bool has_gpu_copy, ret;
+    int i;
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return FALSE;
+
+    if (pExaPixmap == NULL)
+	EXA_FatalErrorDebugWithRet(("EXA bug: ExaDoPrepareAccess was called on a non-exa pixmap.\n"), FALSE);
+
+    /* Handle repeated / nested calls. */
+    for (i = 0; i < EXA_NUM_PREPARE_INDICES; i++) {
+	if (pExaScr->access[i].pixmap == pPixmap) {
+	    pExaScr->access[i].count++;
+	    return pExaScr->access[i].retval;
+	}
+    }
+
+    /* If slot for this index is taken, find an empty slot */
+    if (pExaScr->access[index].pixmap) {
+	for (index = EXA_NUM_PREPARE_INDICES - 1; index >= 0; index--)
+	    if (!pExaScr->access[index].pixmap)
+		break;
+    }
+
+    /* Access to this pixmap hasn't been prepared yet, so data pointer should be NULL. */
+    if (pPixmap->devPrivate.ptr != NULL) {
+	EXA_FatalErrorDebug(("EXA bug: pPixmap->devPrivate.ptr was %p, but should have been NULL.\n",
+			     pPixmap->devPrivate.ptr));
+    }
+
+    has_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+
+    if (has_gpu_copy && pExaPixmap->fb_ptr) {
+	pPixmap->devPrivate.ptr = pExaPixmap->fb_ptr;
+	ret = TRUE;
+    } else {
+	pPixmap->devPrivate.ptr = pExaPixmap->sys_ptr;
+	ret = FALSE;
+    }
+
+    /* Store so we can handle repeated / nested calls. */
+    pExaScr->access[index].pixmap = pPixmap;
+    pExaScr->access[index].count = 1;
+
+    if (!has_gpu_copy)
+	goto out;
+
+    exaWaitSync (pScreen);
+
+    if (pExaScr->info->PrepareAccess == NULL)
+	goto out;
+
+    if (index >= EXA_PREPARE_AUX_DEST &&
+	!(pExaScr->info->flags & EXA_SUPPORTS_PREPARE_AUX)) {
+	if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
+	    FatalError("Unsupported AUX indices used on a pinned pixmap.\n");
+	exaMoveOutPixmap (pPixmap);
+	ret = FALSE;
+	goto out;
+    }
+
+    if (!(*pExaScr->info->PrepareAccess) (pPixmap, index)) {
+	if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED &&
+	    !(pExaScr->info->flags & EXA_MIXED_PIXMAPS))
+	    FatalError("Driver failed PrepareAccess on a pinned pixmap.\n");
+	exaMoveOutPixmap (pPixmap);
+	ret = FALSE;
+	goto out;
+    }
+
+    ret = TRUE;
+
+out:
+    pExaScr->access[index].retval = ret;
+    return ret;
+}
+
+/**
+ * exaPrepareAccess() is EXA's wrapper for the driver's PrepareAccess() handler.
+ *
+ * It deals with waiting for synchronization with the card, determining if
+ * PrepareAccess() is necessary, and working around PrepareAccess() failure.
+ */
+void
+exaPrepareAccess(DrawablePtr pDrawable, int index)
+{
+    PixmapPtr pPixmap = exaGetDrawablePixmap(pDrawable);
+    ExaScreenPriv(pDrawable->pScreen);
+
+    if (pExaScr->prepare_access_reg)
+	pExaScr->prepare_access_reg(pPixmap, index, NULL);
+    else
+	(void)ExaDoPrepareAccess(pPixmap, index);
+}
+
+/**
+ * exaFinishAccess() is EXA's wrapper for the driver's FinishAccess() handler.
+ *
+ * It deals with calling the driver's FinishAccess() only if necessary.
+ */
+void
+exaFinishAccess(DrawablePtr pDrawable, int index)
+{
+    ScreenPtr	    pScreen = pDrawable->pScreen;
+    ExaScreenPriv  (pScreen);
+    PixmapPtr	    pPixmap = exaGetDrawablePixmap (pDrawable);
+    ExaPixmapPriv  (pPixmap);
+    int i;
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return;
+
+    if (pExaPixmap == NULL)
+	EXA_FatalErrorDebugWithRet(("EXA bug: exaFinishAccesss was called on a non-exa pixmap.\n"),);
+
+    /* Handle repeated / nested calls. */
+    for (i = 0; i < EXA_NUM_PREPARE_INDICES; i++) {
+	if (pExaScr->access[i].pixmap == pPixmap) {
+	    if (--pExaScr->access[i].count > 0)
+		return;
+	    break;
+	}
+    }
+
+    /* Catch unbalanced Prepare/FinishAccess calls. */
+    if (i == EXA_NUM_PREPARE_INDICES)
+      EXA_FatalErrorDebugWithRet(("EXA bug: FinishAccess called without PrepareAccess for pixmap 0x%p.\n",
+				  pPixmap),);
+
+    pExaScr->access[i].pixmap = NULL;
+
+    /* We always hide the devPrivate.ptr. */
+    pPixmap->devPrivate.ptr = NULL;
+
+    /* Only call FinishAccess if PrepareAccess was called and succeeded. */
+    if (!pExaScr->info->FinishAccess || !pExaScr->access[i].retval)
+	return;
+
+    if (i >= EXA_PREPARE_AUX_DEST &&
+	!(pExaScr->info->flags & EXA_SUPPORTS_PREPARE_AUX)) {
+	ErrorF("EXA bug: Trying to call driver FinishAccess hook with "
+	       "unsupported index EXA_PREPARE_AUX*\n");
+	return;
+    }
+
+    (*pExaScr->info->FinishAccess) (pPixmap, i);
+}
+
+
+/**
+ * Helper for things common to all schemes when a pixmap is destroyed
+ */
+void
+exaDestroyPixmap(PixmapPtr pPixmap)
+{
+    ExaScreenPriv(pPixmap->drawable.pScreen);
+    int i;
+
+    /* Finish access if it was prepared (e.g. pixmap created during
+     * software fallback)
+     */
+    for (i = 0; i < EXA_NUM_PREPARE_INDICES; i++) {
+	if (pExaScr->access[i].pixmap == pPixmap) {
+	    exaFinishAccess(&pPixmap->drawable, i);
+	    pExaScr->access[i].pixmap = NULL;
+	    break;
+	}
+    }
+}
+
+
+/**
+ * Here begins EXA's GC code.
+ * Do not ever access the fb/mi layer directly.
+ */
+
+static void
+exaValidateGC(GCPtr pGC,
+		unsigned long changes,
+		DrawablePtr pDrawable);
+
+static void
+exaDestroyGC(GCPtr pGC);
+
+static void
+exaChangeGC (GCPtr pGC,
+		unsigned long mask);
+
+static void
+exaCopyGC (GCPtr pGCSrc,
+	      unsigned long mask,
+	      GCPtr	 pGCDst);
+
+static void
+exaChangeClip (GCPtr pGC,
+		int type,
+		pointer pvalue,
+		int nrects);
+
+static void
+exaCopyClip(GCPtr pGCDst, GCPtr pGCSrc);
+
+static void
+exaCopyClip(GCPtr pGCDst, GCPtr pGCSrc);
+
+static void
+exaDestroyClip(GCPtr pGC);
+
+const GCFuncs exaGCFuncs = {
+    exaValidateGC,
+    exaChangeGC,
+    exaCopyGC,
+    exaDestroyGC,
+    exaChangeClip,
+    exaDestroyClip,
+    exaCopyClip
+};
+
+static void
+exaValidateGC(GCPtr pGC,
+		unsigned long changes,
+		DrawablePtr pDrawable)
+{
+    /* fbValidateGC will do direct access to pixmaps if the tiling has changed.
+     * Do a few smart things so fbValidateGC can do it's work.
+     */
+
+    ScreenPtr pScreen = pDrawable->pScreen;
+    ExaScreenPriv(pScreen);
+    ExaGCPriv(pGC);
+    PixmapPtr pTile = NULL;
+    Bool finish_current_tile = FALSE;
+
+    /* Either of these conditions is enough to trigger access to a tile pixmap. */
+    /* With pGC->tileIsPixel == 1, you run the risk of dereferencing an invalid tile pixmap pointer. */
+    if (pGC->fillStyle == FillTiled || ((changes & GCTile) && !pGC->tileIsPixel)) {
+	pTile = pGC->tile.pixmap;
+
+	/* Sometimes tile pixmaps are swapped, you need access to:
+	 * - The current tile if it depth matches.
+	 * - Or the rotated tile if that one matches depth and !(changes & GCTile).
+	 * - Or the current tile pixmap and a newly created one.
+	 */
+	if (pTile && pTile->drawable.depth != pDrawable->depth && !(changes & GCTile)) {
+	    PixmapPtr pRotatedTile = fbGetRotatedPixmap(pGC);
+	    if (pRotatedTile && pRotatedTile->drawable.depth == pDrawable->depth)
+		pTile = pRotatedTile;
+	    else
+		finish_current_tile = TRUE; /* CreatePixmap will be called. */
+	}
+    }
+
+    if (pGC->stipple)
+        exaPrepareAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
+    if (pTile)
+	exaPrepareAccess(&pTile->drawable, EXA_PREPARE_SRC);
+
+    /* Calls to Create/DestroyPixmap have to be identified as special. */
+    pExaScr->fallback_counter++;
+    swap(pExaGC, pGC, funcs);
+    (*pGC->funcs->ValidateGC)(pGC, changes, pDrawable);
+    swap(pExaGC, pGC, funcs);
+    pExaScr->fallback_counter--;
+
+    if (pTile)
+	exaFinishAccess(&pTile->drawable, EXA_PREPARE_SRC);
+    if (finish_current_tile && pGC->tile.pixmap)
+	exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_AUX_DEST);
+    if (pGC->stipple)
+	exaFinishAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
+}
+
+/* Is exaPrepareAccessGC() needed? */
+static void
+exaDestroyGC(GCPtr pGC)
+{
+    ExaGCPriv(pGC);
+    swap(pExaGC, pGC, funcs);
+    (*pGC->funcs->DestroyGC)(pGC);
+    swap(pExaGC, pGC, funcs);
+}
+
+static void
+exaChangeGC (GCPtr pGC,
+		unsigned long mask)
+{
+    ExaGCPriv(pGC);
+    swap(pExaGC, pGC, funcs);
+    (*pGC->funcs->ChangeGC) (pGC, mask);
+    swap(pExaGC, pGC, funcs);
+}
+
+static void
+exaCopyGC (GCPtr pGCSrc,
+	      unsigned long mask,
+	      GCPtr	 pGCDst)
+{
+    ExaGCPriv(pGCDst);
+    swap(pExaGC, pGCDst, funcs);
+    (*pGCDst->funcs->CopyGC) (pGCSrc, mask, pGCDst);
+    swap(pExaGC, pGCDst, funcs);
+}
+
+static void
+exaChangeClip (GCPtr pGC,
+		int type,
+		pointer pvalue,
+		int nrects)
+{
+    ExaGCPriv(pGC);
+    swap(pExaGC, pGC, funcs);
+    (*pGC->funcs->ChangeClip) (pGC, type, pvalue, nrects);
+    swap(pExaGC, pGC, funcs);
+}
+
+static void
+exaCopyClip(GCPtr pGCDst, GCPtr pGCSrc)
+{
+    ExaGCPriv(pGCDst);
+    swap(pExaGC, pGCDst, funcs);
+    (*pGCDst->funcs->CopyClip)(pGCDst, pGCSrc);
+    swap(pExaGC, pGCDst, funcs);
+}
+
+static void
+exaDestroyClip(GCPtr pGC)
+{
+    ExaGCPriv(pGC);
+    swap(pExaGC, pGC, funcs);
+    (*pGC->funcs->DestroyClip)(pGC);
+    swap(pExaGC, pGC, funcs);
+}
+
+/**
+ * exaCreateGC makes a new GC and hooks up its funcs handler, so that
+ * exaValidateGC() will get called.
+ */
+static int
+exaCreateGC (GCPtr pGC)
+{
+    ScreenPtr pScreen = pGC->pScreen;
+    ExaScreenPriv(pScreen);
+    ExaGCPriv(pGC);
+    Bool ret;
+
+    swap(pExaScr, pScreen, CreateGC);
+    if ((ret = (*pScreen->CreateGC) (pGC))) {
+	wrap(pExaGC, pGC, funcs, (GCFuncs *) &exaGCFuncs);
+	wrap(pExaGC, pGC, ops, (GCOps *) &exaOps);
+    }
+    swap(pExaScr, pScreen, CreateGC);
+
+    return ret;
+}
+
+static Bool
+exaChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
+{
+    Bool ret;
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    if ((mask & CWBackPixmap) && pWin->backgroundState == BackgroundPixmap) 
+	exaPrepareAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
+
+    if ((mask & CWBorderPixmap) && pWin->borderIsPixel == FALSE)
+	exaPrepareAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_MASK);
+
+    pExaScr->fallback_counter++;
+    swap(pExaScr, pScreen, ChangeWindowAttributes);
+    ret = pScreen->ChangeWindowAttributes(pWin, mask);
+    swap(pExaScr, pScreen, ChangeWindowAttributes);
+    pExaScr->fallback_counter--;
+
+    if ((mask & CWBackPixmap) && pWin->backgroundState == BackgroundPixmap) 
+	exaFinishAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
+    if ((mask & CWBorderPixmap) && pWin->borderIsPixel == FALSE)
+	exaFinishAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_MASK);
+
+    return ret;
+}
+
+static RegionPtr
+exaBitmapToRegion(PixmapPtr pPix)
+{
+    RegionPtr ret;
+    ScreenPtr pScreen = pPix->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    exaPrepareAccess(&pPix->drawable, EXA_PREPARE_SRC);
+    swap(pExaScr, pScreen, BitmapToRegion);
+    ret = (*pScreen->BitmapToRegion)(pPix);
+    swap(pExaScr, pScreen, BitmapToRegion);
+    exaFinishAccess(&pPix->drawable, EXA_PREPARE_SRC);
+
+    return ret;
+}
+
+static Bool
+exaCreateScreenResources(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    PixmapPtr pScreenPixmap;
+    Bool b;
+
+    swap(pExaScr, pScreen, CreateScreenResources);
+    b = pScreen->CreateScreenResources(pScreen);
+    swap(pExaScr, pScreen, CreateScreenResources);
+
+    if (!b)
+        return FALSE;
+
+    pScreenPixmap = pScreen->GetScreenPixmap(pScreen);
+
+    if (pScreenPixmap) {
+        ExaPixmapPriv(pScreenPixmap);
+
+        exaSetAccelBlock(pExaScr, pExaPixmap,
+                         pScreenPixmap->drawable.width,
+                         pScreenPixmap->drawable.height,
+                         pScreenPixmap->drawable.bitsPerPixel);
+    }
+
+    return TRUE;
+}
+
+static void
+ExaBlockHandler(int screenNum, pointer blockData, pointer pTimeout,
+		pointer pReadmask)
+{
+    ScreenPtr pScreen = screenInfo.screens[screenNum];
+    ExaScreenPriv(pScreen);
+
+    /* Move any deferred results from a software fallback to the driver pixmap */
+    if (pExaScr->deferred_mixed_pixmap)
+	exaMoveInPixmap_mixed(pExaScr->deferred_mixed_pixmap);
+
+    unwrap(pExaScr, pScreen, BlockHandler);
+    (*pScreen->BlockHandler) (screenNum, blockData, pTimeout, pReadmask);
+    wrap(pExaScr, pScreen, BlockHandler, ExaBlockHandler);
+
+    /* The rest only applies to classic EXA */
+    if (pExaScr->info->flags & EXA_HANDLES_PIXMAPS)
+	return;
+
+    /* Try and keep the offscreen memory area tidy every now and then (at most 
+     * once per second) when the server has been idle for at least 100ms.
+     */
+    if (pExaScr->numOffscreenAvailable > 1) {
+	CARD32 now = GetTimeInMillis();
+
+	pExaScr->nextDefragment = now +
+	    max(100, (INT32)(pExaScr->lastDefragment + 1000 - now));
+	AdjustWaitForDelay(pTimeout, pExaScr->nextDefragment - now);
+    }
+}
+
+static void
+ExaWakeupHandler(int screenNum, pointer wakeupData, unsigned long result,
+		 pointer pReadmask)
+{
+    ScreenPtr pScreen = screenInfo.screens[screenNum];
+    ExaScreenPriv(pScreen);
+
+    unwrap(pExaScr, pScreen, WakeupHandler);
+    (*pScreen->WakeupHandler) (screenNum, wakeupData, result, pReadmask);
+    wrap(pExaScr, pScreen, WakeupHandler, ExaWakeupHandler);
+
+    if (result == 0 && pExaScr->numOffscreenAvailable > 1) {
+	CARD32 now = GetTimeInMillis();
+
+	if ((int)(now - pExaScr->nextDefragment) > 0) {
+	    ExaOffscreenDefragment(pScreen);
+	    pExaScr->lastDefragment = now;
+	}
+    }
+}
+
+/**
+ * exaCloseScreen() unwraps its wrapped screen functions and tears down EXA's
+ * screen private, before calling down to the next CloseSccreen.
+ */
+static Bool
+exaCloseScreen(int i, ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    PictureScreenPtr	ps = GetPictureScreenIfSet(pScreen);
+
+    if (ps->Glyphs == exaGlyphs)
+	exaGlyphsFini(pScreen);
+
+    if (pScreen->BlockHandler == ExaBlockHandler)
+	unwrap(pExaScr, pScreen, BlockHandler);
+    if (pScreen->WakeupHandler == ExaWakeupHandler)
+	unwrap(pExaScr, pScreen, WakeupHandler);
+    unwrap(pExaScr, pScreen, CreateGC);
+    unwrap(pExaScr, pScreen, CloseScreen);
+    unwrap(pExaScr, pScreen, GetImage);
+    unwrap(pExaScr, pScreen, GetSpans);
+    if (pExaScr->SavedCreatePixmap)
+	unwrap(pExaScr, pScreen, CreatePixmap);
+    if (pExaScr->SavedDestroyPixmap)
+	unwrap(pExaScr, pScreen, DestroyPixmap);
+    if (pExaScr->SavedModifyPixmapHeader)
+	unwrap(pExaScr, pScreen, ModifyPixmapHeader);
+    unwrap(pExaScr, pScreen, CopyWindow);
+    unwrap(pExaScr, pScreen, ChangeWindowAttributes);
+    unwrap(pExaScr, pScreen, BitmapToRegion);
+    unwrap(pExaScr, pScreen, CreateScreenResources);
+    unwrap(pExaScr, ps, Composite);
+    if (pExaScr->SavedGlyphs)
+	unwrap(pExaScr, ps, Glyphs);
+    unwrap(pExaScr, ps, Trapezoids);
+    unwrap(pExaScr, ps, Triangles);
+    unwrap(pExaScr, ps, AddTraps);
+
+    free(pExaScr);
+
+    return (*pScreen->CloseScreen) (i, pScreen);
+}
+
+/**
+ * This function allocates a driver structure for EXA drivers to fill in.  By
+ * having EXA allocate the structure, the driver structure can be extended
+ * without breaking ABI between EXA and the drivers.  The driver's
+ * responsibility is to check beforehand that the EXA module has a matching
+ * major number and sufficient minor.  Drivers are responsible for freeing the
+ * driver structure using free().
+ *
+ * @return a newly allocated, zero-filled driver structure
+ */
+ExaDriverPtr
+exaDriverAlloc(void)
+{
+    return calloc(1, sizeof(ExaDriverRec));
+}
+
+/**
+ * @param pScreen screen being initialized
+ * @param pScreenInfo EXA driver record
+ *
+ * exaDriverInit sets up EXA given a driver record filled in by the driver.
+ * pScreenInfo should have been allocated by exaDriverAlloc().  See the
+ * comments in _ExaDriver for what must be filled in and what is optional.
+ *
+ * @return TRUE if EXA was successfully initialized.
+ */
+Bool
+exaDriverInit (ScreenPtr		pScreen,
+               ExaDriverPtr	pScreenInfo)
+{
+    ExaScreenPrivPtr pExaScr;
+    PictureScreenPtr ps;
+
+    if (!pScreenInfo)
+	return FALSE;
+
+    if (pScreenInfo->exa_major != EXA_VERSION_MAJOR ||
+	pScreenInfo->exa_minor > EXA_VERSION_MINOR)
+    {
+	LogMessage(X_ERROR, "EXA(%d): driver's EXA version requirements "
+		   "(%d.%d) are incompatible with EXA version (%d.%d)\n",
+		   pScreen->myNum,
+		   pScreenInfo->exa_major, pScreenInfo->exa_minor,
+		   EXA_VERSION_MAJOR, EXA_VERSION_MINOR);
+	return FALSE;
+    }
+
+    if (!pScreenInfo->CreatePixmap && !pScreenInfo->CreatePixmap2) {
+	if (!pScreenInfo->memoryBase) {
+	    LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::memoryBase "
+		       "must be non-zero\n", pScreen->myNum);
+	    return FALSE;
+	}
+
+	if (!pScreenInfo->memorySize) {
+	    LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::memorySize must be "
+		       "non-zero\n", pScreen->myNum);
+	    return FALSE;
+	}
+
+	if (pScreenInfo->offScreenBase > pScreenInfo->memorySize) {
+	    LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::offScreenBase must "
+		       "be <= ExaDriverRec::memorySize\n", pScreen->myNum);
+	    return FALSE;
+	}
+    }
+
+    if (!pScreenInfo->PrepareSolid) {
+	LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::PrepareSolid must be "
+		   "non-NULL\n", pScreen->myNum);
+	return FALSE;
+    }
+
+    if (!pScreenInfo->PrepareCopy) {
+	LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::PrepareCopy must be "
+		   "non-NULL\n", pScreen->myNum);
+	return FALSE;
+    }
+
+    if (!pScreenInfo->WaitMarker) {
+	LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::WaitMarker must be "
+		   "non-NULL\n", pScreen->myNum);
+	return FALSE;
+    }
+
+    /* If the driver doesn't set any max pitch values, we'll just assume
+     * that there's a limitation by pixels, and that it's the same as
+     * maxX.
+     *
+     * We want maxPitchPixels or maxPitchBytes to be set so we can check
+     * pixmaps against the max pitch in exaCreatePixmap() -- it matters
+     * whether a pixmap is rejected because of its pitch or
+     * because of its width.
+     */
+    if (!pScreenInfo->maxPitchPixels && !pScreenInfo->maxPitchBytes)
+    {
+        pScreenInfo->maxPitchPixels = pScreenInfo->maxX;
+    }
+
+    ps = GetPictureScreenIfSet(pScreen);
+
+    if (!dixRegisterPrivateKey(&exaScreenPrivateKeyRec, PRIVATE_SCREEN, 0)) {
+        LogMessage(X_WARNING, "EXA(%d): Failed to register screen private\n",
+		   pScreen->myNum);
+	return FALSE;
+    }
+
+    pExaScr = calloc (sizeof (ExaScreenPrivRec), 1);
+    if (!pExaScr) {
+        LogMessage(X_WARNING, "EXA(%d): Failed to allocate screen private\n",
+		   pScreen->myNum);
+	return FALSE;
+    }
+
+    pExaScr->info = pScreenInfo;
+
+    dixSetPrivate(&pScreen->devPrivates, exaScreenPrivateKey, pExaScr);
+
+    pExaScr->migration = ExaMigrationAlways;
+
+    exaDDXDriverInit(pScreen);
+
+    if (!dixRegisterPrivateKey(&exaGCPrivateKeyRec, PRIVATE_GC, sizeof(ExaGCPrivRec))) {
+	LogMessage(X_WARNING,
+	       "EXA(%d): Failed to allocate GC private\n",
+	       pScreen->myNum);
+	return FALSE;
+    }
+
+    /*
+     * Replace various fb screen functions
+     */
+    if ((pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS) &&
+	(!(pExaScr->info->flags & EXA_HANDLES_PIXMAPS) ||
+	 (pExaScr->info->flags & EXA_MIXED_PIXMAPS)))
+	wrap(pExaScr, pScreen, BlockHandler, ExaBlockHandler);
+    if ((pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS) &&
+	!(pExaScr->info->flags & EXA_HANDLES_PIXMAPS))
+	wrap(pExaScr, pScreen, WakeupHandler, ExaWakeupHandler);
+    wrap(pExaScr, pScreen, CreateGC, exaCreateGC);
+    wrap(pExaScr, pScreen, CloseScreen, exaCloseScreen);
+    wrap(pExaScr, pScreen, GetImage, exaGetImage);
+    wrap(pExaScr, pScreen, GetSpans, ExaCheckGetSpans);
+    wrap(pExaScr, pScreen, CopyWindow, exaCopyWindow);
+    wrap(pExaScr, pScreen, ChangeWindowAttributes, exaChangeWindowAttributes);
+    wrap(pExaScr, pScreen, BitmapToRegion, exaBitmapToRegion);
+    wrap(pExaScr, pScreen, CreateScreenResources, exaCreateScreenResources);
+
+    if (ps) {
+	wrap(pExaScr, ps, Composite, exaComposite);
+	if (pScreenInfo->PrepareComposite) {
+	    wrap(pExaScr, ps, Glyphs, exaGlyphs);
+	} else {
+	    wrap(pExaScr, ps, Glyphs, ExaCheckGlyphs);
+	}
+	wrap(pExaScr, ps, Trapezoids, exaTrapezoids);
+	wrap(pExaScr, ps, Triangles, exaTriangles);
+	wrap(pExaScr, ps, AddTraps, ExaCheckAddTraps);
+    }
+
+#ifdef MITSHM
+    /*
+     * Don't allow shared pixmaps.
+     */
+    ShmRegisterFuncs(pScreen, &exaShmFuncs);
+#endif
+    /*
+     * Hookup offscreen pixmaps
+     */
+    if (pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS)
+    {
+	if (!dixRegisterPrivateKey(&exaPixmapPrivateKeyRec, PRIVATE_PIXMAP, sizeof(ExaPixmapPrivRec))) {
+            LogMessage(X_WARNING,
+		       "EXA(%d): Failed to allocate pixmap private\n",
+		       pScreen->myNum);
+	    return FALSE;
+        }
+	if (pExaScr->info->flags & EXA_HANDLES_PIXMAPS) {
+	    if (pExaScr->info->flags & EXA_MIXED_PIXMAPS) {
+		wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_mixed);
+		wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_mixed);
+		wrap(pExaScr, pScreen, ModifyPixmapHeader, exaModifyPixmapHeader_mixed);
+		pExaScr->do_migration = exaDoMigration_mixed;
+		pExaScr->pixmap_has_gpu_copy = exaPixmapHasGpuCopy_mixed;
+		pExaScr->do_move_in_pixmap = exaMoveInPixmap_mixed;
+		pExaScr->do_move_out_pixmap = NULL;
+		pExaScr->prepare_access_reg = exaPrepareAccessReg_mixed;
+	    } else {
+		wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_driver);
+		wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_driver);
+		wrap(pExaScr, pScreen, ModifyPixmapHeader, exaModifyPixmapHeader_driver);
+		pExaScr->do_migration = NULL;
+		pExaScr->pixmap_has_gpu_copy = exaPixmapHasGpuCopy_driver;
+		pExaScr->do_move_in_pixmap = NULL;
+		pExaScr->do_move_out_pixmap = NULL;
+		pExaScr->prepare_access_reg = NULL;
+	    }
+	} else {
+	    wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmap_classic);
+	    wrap(pExaScr, pScreen, DestroyPixmap, exaDestroyPixmap_classic);
+	    wrap(pExaScr, pScreen, ModifyPixmapHeader, exaModifyPixmapHeader_classic);
+	    pExaScr->do_migration = exaDoMigration_classic;
+	    pExaScr->pixmap_has_gpu_copy = exaPixmapHasGpuCopy_classic;
+	    pExaScr->do_move_in_pixmap = exaMoveInPixmap_classic;
+	    pExaScr->do_move_out_pixmap = exaMoveOutPixmap_classic;
+	    pExaScr->prepare_access_reg = exaPrepareAccessReg_classic;
+	}
+	if (!(pExaScr->info->flags & EXA_HANDLES_PIXMAPS)) {
+	    LogMessage(X_INFO, "EXA(%d): Offscreen pixmap area of %lu bytes\n",
+		       pScreen->myNum,
+		       pExaScr->info->memorySize - pExaScr->info->offScreenBase);
+	} else {
+	    LogMessage(X_INFO, "EXA(%d): Driver allocated offscreen pixmaps\n",
+		       pScreen->myNum);
+
+	}
+    }
+    else
+        LogMessage(X_INFO, "EXA(%d): No offscreen pixmaps\n", pScreen->myNum);
+
+    if (!(pExaScr->info->flags & EXA_HANDLES_PIXMAPS)) {
+	DBG_PIXMAP(("============== %ld < %ld\n", pExaScr->info->offScreenBase,
+		    pExaScr->info->memorySize));
+	if (pExaScr->info->offScreenBase < pExaScr->info->memorySize) {
+	    if (!exaOffscreenInit (pScreen)) {
+		LogMessage(X_WARNING, "EXA(%d): Offscreen pixmap setup failed\n",
+			   pScreen->myNum);
+		return FALSE;
+	    }
+	}
+    }
+
+    if (ps->Glyphs == exaGlyphs)
+	exaGlyphsInit(pScreen);
+
+    LogMessage(X_INFO, "EXA(%d): Driver registered support for the following"
+	       " operations:\n", pScreen->myNum);
+    assert(pScreenInfo->PrepareSolid != NULL);
+    LogMessage(X_INFO, "        Solid\n");
+    assert(pScreenInfo->PrepareCopy != NULL);
+    LogMessage(X_INFO, "        Copy\n");
+    if (pScreenInfo->PrepareComposite != NULL) {
+	LogMessage(X_INFO, "        Composite (RENDER acceleration)\n");
+    }
+    if (pScreenInfo->UploadToScreen != NULL) {
+	LogMessage(X_INFO, "        UploadToScreen\n");
+    }
+    if (pScreenInfo->DownloadFromScreen != NULL) {
+	LogMessage(X_INFO, "        DownloadFromScreen\n");
+    }
+
+    return TRUE;
+}
+
+/**
+ * exaDriverFini tears down EXA on a given screen.
+ *
+ * @param pScreen screen being torn down.
+ */
+void
+exaDriverFini (ScreenPtr pScreen)
+{
+    /*right now does nothing*/
+}
+
+/**
+ * exaMarkSync() should be called after any asynchronous drawing by the hardware.
+ *
+ * @param pScreen screen which drawing occurred on
+ *
+ * exaMarkSync() sets a flag to indicate that some asynchronous drawing has
+ * happened and a WaitSync() will be necessary before relying on the contents of
+ * offscreen memory from the CPU's perspective.  It also calls an optional
+ * driver MarkSync() callback, the return value of which may be used to do partial
+ * synchronization with the hardware in the future.
+ */
+void exaMarkSync(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+
+    pExaScr->info->needsSync = TRUE;
+    if (pExaScr->info->MarkSync != NULL) {
+        pExaScr->info->lastMarker = (*pExaScr->info->MarkSync)(pScreen);
+    }
+}
+
+/**
+ * exaWaitSync() ensures that all drawing has been completed.
+ *
+ * @param pScreen screen being synchronized.
+ *
+ * Calls down into the driver to ensure that all previous drawing has completed.
+ * It should always be called before relying on the framebuffer contents
+ * reflecting previous drawing, from a CPU perspective.
+ */
+void exaWaitSync(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+
+    if (pExaScr->info->needsSync && !pExaScr->swappedOut) {
+        (*pExaScr->info->WaitMarker)(pScreen, pExaScr->info->lastMarker);
+        pExaScr->info->needsSync = FALSE;
+    }
+}
+
+/**
+ * Performs migration of the pixmaps according to the operation information
+ * provided in pixmaps and can_accel and the migration scheme chosen in the
+ * config file.
+ */
+void
+exaDoMigration (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel)
+{
+    ScreenPtr pScreen = pixmaps[0].pPix->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return;
+
+    if (pExaScr->do_migration)
+	(*pExaScr->do_migration)(pixmaps, npixmaps, can_accel);
+}
+
+void
+exaMoveInPixmap (PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return;
+
+    if (pExaScr->do_move_in_pixmap)
+	(*pExaScr->do_move_in_pixmap)(pPixmap);
+}
+
+void
+exaMoveOutPixmap (PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+
+    if (!(pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS))
+	return;
+
+    if (pExaScr->do_move_out_pixmap)
+	(*pExaScr->do_move_out_pixmap)(pPixmap);
+}
diff --git a/exa/exa.h b/exa/exa.h
new file mode 100644
index 0000000..8c93d15
--- /dev/null
+++ b/exa/exa.h
@@ -0,0 +1,843 @@
+/*
+ *
+ * Copyright (C) 2000 Keith Packard
+ *               2004 Eric Anholt
+ *               2005 Zack Rusin
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Copyright holders make no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/** @file
+ * This is the header containing the public API of EXA for exa drivers.
+ */
+
+#ifndef EXA_H
+#define EXA_H
+
+#include "scrnintstr.h"
+#include "pixmapstr.h"
+#include "windowstr.h"
+#include "gcstruct.h"
+#include "picturestr.h"
+#include "fb.h"
+
+#define EXA_VERSION_MAJOR   2
+#define EXA_VERSION_MINOR   5
+#define EXA_VERSION_RELEASE 0
+
+typedef struct _ExaOffscreenArea ExaOffscreenArea;
+
+typedef void (*ExaOffscreenSaveProc) (ScreenPtr pScreen, ExaOffscreenArea *area);
+
+typedef enum _ExaOffscreenState {
+    ExaOffscreenAvail,
+    ExaOffscreenRemovable,
+    ExaOffscreenLocked
+} ExaOffscreenState;
+
+struct _ExaOffscreenArea {
+    int                 base_offset;	/* allocation base */
+    int                 offset;         /* aligned offset */
+    int                 size;           /* total allocation size */
+    unsigned            last_use;
+    pointer             privData;
+
+    ExaOffscreenSaveProc save;
+
+    ExaOffscreenState   state;
+
+    ExaOffscreenArea    *next;
+
+    unsigned            eviction_cost;
+
+    ExaOffscreenArea    *prev;          /* Double-linked list for defragmentation */
+    int                 align;          /* required alignment */
+};
+
+/**
+ * The ExaDriver structure is allocated through exaDriverAlloc(), and then
+ * fllled in by drivers.
+ */
+typedef struct _ExaDriver {
+    /**
+     * exa_major and exa_minor should be set by the driver to the version of
+     * EXA which the driver was compiled for (or configures itself at runtime
+     * to support).  This allows EXA to extend the structure for new features
+     * without breaking ABI for drivers compiled against older versions.
+     */
+    int exa_major, exa_minor;
+
+    /**
+     * memoryBase is the address of the beginning of framebuffer memory.
+     * The visible screen should be within memoryBase to memoryBase +
+     * memorySize.
+     */
+    CARD8         *memoryBase;
+
+    /**
+     * offScreenBase is the offset from memoryBase of the beginning of the area
+     * to be managed by EXA's linear offscreen memory manager.
+     *
+     * In XFree86 DDX drivers, this is probably:
+     *   (pScrn->displayWidth * cpp * pScrn->virtualY)
+     */
+    unsigned long  offScreenBase;
+
+    /**
+     * memorySize is the length (in bytes) of framebuffer memory beginning
+     * from memoryBase.
+     *
+     * The offscreen memory manager will manage the area beginning at
+     * (memoryBase + offScreenBase), with a length of (memorySize -
+     * offScreenBase)
+     *
+     * In XFree86 DDX drivers, this is probably (pScrn->videoRam * 1024)
+     */
+    unsigned long memorySize;
+
+    /**
+     * pixmapOffsetAlign is the byte alignment necessary for pixmap offsets
+     * within framebuffer.
+     *
+     * Hardware typically has a required alignment of offsets, which may or may
+     * not be a power of two.  EXA will ensure that pixmaps managed by the
+     * offscreen memory manager meet this alignment requirement.
+     */
+    int pixmapOffsetAlign;
+
+    /**
+     * pixmapPitchAlign is the byte alignment necessary for pixmap pitches
+     * within the framebuffer.
+     *
+     * Hardware typically has a required alignment of pitches for acceleration.
+     * For 3D hardware, Composite acceleration often requires that source and
+     * mask pixmaps (textures) have a power-of-two pitch, which can be demanded
+     * using EXA_OFFSCREEN_ALIGN_POT.  These pitch requirements only apply to
+     * pixmaps managed by the offscreen memory manager.  Thus, it is up to the
+     * driver to ensure that the visible screen has an appropriate pitch for
+     * acceleration.
+     */
+    int pixmapPitchAlign;
+
+    /**
+     * The flags field is bitfield of boolean values controlling EXA's behavior.
+     *
+     * The flags in clude EXA_OFFSCREEN_PIXMAPS, EXA_OFFSCREEN_ALIGN_POT, and
+     * EXA_TWO_BITBLT_DIRECTIONS.
+     */
+    int flags;
+
+    /** @{ */
+    /**
+     * maxX controls the X coordinate limitation for rendering from the card.
+     * The driver should never receive a request for rendering beyond maxX
+     * in the X direction from the origin of a pixmap.
+     */
+    int maxX;
+
+    /**
+     * maxY controls the Y coordinate limitation for rendering from the card.
+     * The driver should never receive a request for rendering beyond maxY
+     * in the Y direction from the origin of a pixmap.
+     */
+    int maxY;
+    /** @} */
+
+    /* private */
+    ExaOffscreenArea *offScreenAreas;
+    Bool              needsSync;
+    int               lastMarker;
+
+    /** @name Solid
+     * @{
+     */
+    /**
+     * PrepareSolid() sets up the driver for doing a solid fill.
+     * @param pPixmap Destination pixmap
+     * @param alu raster operation
+     * @param planemask write mask for the fill
+     * @param fg "foreground" color for the fill
+     *
+     * This call should set up the driver for doing a series of solid fills
+     * through the Solid() call.  The alu raster op is one of the GX*
+     * graphics functions listed in X.h, and typically maps to a similar
+     * single-byte "ROP" setting in all hardware.  The planemask controls
+     * which bits of the destination should be affected, and will only represent
+     * the bits up to the depth of pPixmap.  The fg is the pixel value of the
+     * foreground color referred to in ROP descriptions.
+     *
+     * Note that many drivers will need to store some of the data in the driver
+     * private record, for sending to the hardware with each drawing command.
+     *
+     * The PrepareSolid() call is required of all drivers, but it may fail for any
+     * reason.  Failure results in a fallback to software rendering.
+     */
+    Bool        (*PrepareSolid) (PixmapPtr      pPixmap,
+                                 int            alu,
+                                 Pixel          planemask,
+                                 Pixel          fg);
+
+    /**
+     * Solid() performs a solid fill set up in the last PrepareSolid() call.
+     *
+     * @param pPixmap destination pixmap
+     * @param x1 left coordinate
+     * @param y1 top coordinate
+     * @param x2 right coordinate
+     * @param y2 bottom coordinate
+     *
+     * Performs the fill set up by the last PrepareSolid() call, covering the
+     * area from (x1,y1) to (x2,y2) in pPixmap.  Note that the coordinates are
+     * in the coordinate space of the destination pixmap, so the driver will
+     * need to set up the hardware's offset and pitch for the destination
+     * coordinates according to the pixmap's offset and pitch within
+     * framebuffer.  This likely means using exaGetPixmapOffset() and
+     * exaGetPixmapPitch().
+     *
+     * This call is required if PrepareSolid() ever succeeds.
+     */
+    void        (*Solid) (PixmapPtr      pPixmap, int x1, int y1, int x2, int y2);
+
+    /**
+     * DoneSolid() finishes a set of solid fills.
+     *
+     * @param pPixmap destination pixmap.
+     *
+     * The DoneSolid() call is called at the end of a series of consecutive
+     * Solid() calls following a successful PrepareSolid().  This allows drivers
+     * to finish up emitting drawing commands that were buffered, or clean up
+     * state from PrepareSolid().
+     *
+     * This call is required if PrepareSolid() ever succeeds.
+     */
+    void        (*DoneSolid) (PixmapPtr      pPixmap);
+    /** @} */
+
+    /** @name Copy
+     * @{
+     */
+    /**
+     * PrepareCopy() sets up the driver for doing a copy within video 
+     * memory.
+     *
+     * @param pSrcPixmap source pixmap
+     * @param pDstPixmap destination pixmap
+     * @param dx X copy direction
+     * @param dy Y copy direction
+     * @param alu raster operation
+     * @param planemask write mask for the fill
+     *
+     * This call should set up the driver for doing a series of copies from the
+     * the pSrcPixmap to the pDstPixmap.  The dx flag will be positive if the
+     * hardware should do the copy from the left to the right, and dy will be
+     * positive if the copy should be done from the top to the bottom.  This
+     * is to deal with self-overlapping copies when pSrcPixmap == pDstPixmap.
+     * If your hardware can only support blits that are (left to right, top to
+     * bottom) or (right to left, bottom to top), then you should set
+     * #EXA_TWO_BITBLT_DIRECTIONS, and EXA will break down Copy operations to
+     * ones that meet those requirements.  The alu raster op is one of the GX*
+     * graphics functions listed in X.h, and typically maps to a similar
+     * single-byte "ROP" setting in all hardware.  The planemask controls which
+     * bits of the destination should be affected, and will only represent the
+     * bits up to the depth of pPixmap.
+     *
+     * Note that many drivers will need to store some of the data in the driver
+     * private record, for sending to the hardware with each drawing command.
+     *
+     * The PrepareCopy() call is required of all drivers, but it may fail for any
+     * reason.  Failure results in a fallback to software rendering.
+     */
+    Bool        (*PrepareCopy) (PixmapPtr       pSrcPixmap,
+                                PixmapPtr       pDstPixmap,
+                                int             dx,
+                                int             dy,
+                                int             alu,
+                                Pixel           planemask);
+
+    /**
+     * Copy() performs a copy set up in the last PrepareCopy call.
+     *
+     * @param pDstPixmap destination pixmap
+     * @param srcX source X coordinate
+     * @param srcY source Y coordinate
+     * @param dstX destination X coordinate
+     * @param dstY destination Y coordinate
+     * @param width width of the rectangle to be copied
+     * @param height height of the rectangle to be copied.
+     *
+     * Performs the copy set up by the last PrepareCopy() call, copying the
+     * rectangle from (srcX, srcY) to (srcX + width, srcY + width) in the source
+     * pixmap to the same-sized rectangle at (dstX, dstY) in the destination
+     * pixmap.  Those rectangles may overlap in memory, if
+     * pSrcPixmap == pDstPixmap.  Note that this call does not receive the
+     * pSrcPixmap as an argument -- if it's needed in this function, it should
+     * be stored in the driver private during PrepareCopy().  As with Solid(),
+     * the coordinates are in the coordinate space of each pixmap, so the driver
+     * will need to set up source and destination pitches and offsets from those
+     * pixmaps, probably using exaGetPixmapOffset() and exaGetPixmapPitch().
+     *
+     * This call is required if PrepareCopy ever succeeds.
+     */
+    void        (*Copy) (PixmapPtr       pDstPixmap,
+                         int    srcX,
+                         int    srcY,
+                         int    dstX,
+                         int    dstY,
+                         int    width,
+                         int    height);
+
+    /**
+     * DoneCopy() finishes a set of copies.
+     *
+     * @param pPixmap destination pixmap.
+     *
+     * The DoneCopy() call is called at the end of a series of consecutive
+     * Copy() calls following a successful PrepareCopy().  This allows drivers
+     * to finish up emitting drawing commands that were buffered, or clean up
+     * state from PrepareCopy().
+     *
+     * This call is required if PrepareCopy() ever succeeds.
+     */
+    void        (*DoneCopy) (PixmapPtr       pDstPixmap);
+    /** @} */
+
+    /** @name Composite
+     * @{
+     */
+    /**
+     * CheckComposite() checks to see if a composite operation could be
+     * accelerated.
+     *
+     * @param op Render operation
+     * @param pSrcPicture source Picture
+     * @param pMaskPicture mask picture
+     * @param pDstPicture destination Picture
+     *
+     * The CheckComposite() call checks if the driver could handle acceleration
+     * of op with the given source, mask, and destination pictures.  This allows
+     * drivers to check source and destination formats, supported operations,
+     * transformations, and component alpha state, and send operations it can't
+     * support to software rendering early on.  This avoids costly pixmap
+     * migration to the wrong places when the driver can't accelerate
+     * operations.  Note that because migration hasn't happened, the driver
+     * can't know during CheckComposite() what the offsets and pitches of the
+     * pixmaps are going to be.
+     *
+     * See PrepareComposite() for more details on likely issues that drivers
+     * will have in accelerating Composite operations.
+     *
+     * The CheckComposite() call is recommended if PrepareComposite() is
+     * implemented, but is not required.
+     */
+    Bool        (*CheckComposite) (int          op,
+                                   PicturePtr   pSrcPicture,
+                                   PicturePtr   pMaskPicture,
+                                   PicturePtr   pDstPicture);
+
+    /**
+     * PrepareComposite() sets up the driver for doing a Composite operation
+     * described in the Render extension protocol spec.
+     *
+     * @param op Render operation
+     * @param pSrcPicture source Picture
+     * @param pMaskPicture mask picture
+     * @param pDstPicture destination Picture
+     * @param pSrc source pixmap
+     * @param pMask mask pixmap
+     * @param pDst destination pixmap
+     *
+     * This call should set up the driver for doing a series of Composite
+     * operations, as described in the Render protocol spec, with the given
+     * pSrcPicture, pMaskPicture, and pDstPicture.  The pSrc, pMask, and
+     * pDst are the pixmaps containing the pixel data, and should be used for
+     * setting the offset and pitch used for the coordinate spaces for each of
+     * the Pictures.
+     *
+     * Notes on interpreting Picture structures:
+     * - The Picture structures will always have a valid pDrawable.
+     * - The Picture structures will never have alphaMap set.
+     * - The mask Picture (and therefore pMask) may be NULL, in which case the
+     *   operation is simply src OP dst instead of src IN mask OP dst, and
+     *   mask coordinates should be ignored.
+     * - pMarkPicture may have componentAlpha set, which greatly changes
+     *   the behavior of the Composite operation.  componentAlpha has no effect
+     *   when set on pSrcPicture or pDstPicture.
+     * - The source and mask Pictures may have a transformation set
+     *   (Picture->transform != NULL), which means that the source coordinates
+     *   should be transformed by that transformation, resulting in scaling,
+     *   rotation, etc.  The PictureTransformPoint() call can transform
+     *   coordinates for you.  Transforms have no effect on Pictures when used
+     *   as a destination.
+     * - The source and mask pictures may have a filter set.  PictFilterNearest
+     *   and PictFilterBilinear are defined in the Render protocol, but others
+     *   may be encountered, and must be handled correctly (usually by
+     *   PrepareComposite failing, and falling back to software).  Filters have
+     *   no effect on Pictures when used as a destination.
+     * - The source and mask Pictures may have repeating set, which must be
+     *   respected.  Many chipsets will be unable to support repeating on
+     *   pixmaps that have a width or height that is not a power of two.
+     *
+     * If your hardware can't support source pictures (textures) with
+     * non-power-of-two pitches, you should set #EXA_OFFSCREEN_ALIGN_POT.
+     *
+     * Note that many drivers will need to store some of the data in the driver
+     * private record, for sending to the hardware with each drawing command.
+     *
+     * The PrepareComposite() call is not required.  However, it is highly
+     * recommended for performance of antialiased font rendering and performance
+     * of cairo applications.  Failure results in a fallback to software
+     * rendering.
+     */
+    Bool        (*PrepareComposite) (int                op,
+                                     PicturePtr         pSrcPicture,
+                                     PicturePtr         pMaskPicture,
+                                     PicturePtr         pDstPicture,
+                                     PixmapPtr          pSrc,
+                                     PixmapPtr          pMask,
+                                     PixmapPtr          pDst);
+
+    /**
+     * Composite() performs a Composite operation set up in the last
+     * PrepareComposite() call.
+     *
+     * @param pDstPixmap destination pixmap
+     * @param srcX source X coordinate
+     * @param srcY source Y coordinate
+     * @param maskX source X coordinate
+     * @param maskY source Y coordinate
+     * @param dstX destination X coordinate
+     * @param dstY destination Y coordinate
+     * @param width destination rectangle width
+     * @param height destination rectangle height
+     *
+     * Performs the Composite operation set up by the last PrepareComposite()
+     * call, to the rectangle from (dstX, dstY) to (dstX + width, dstY + height)
+     * in the destination Pixmap.  Note that if a transformation was set on
+     * the source or mask Pictures, the source rectangles may not be the same
+     * size as the destination rectangles and filtering.  Getting the coordinate
+     * transformation right at the subpixel level can be tricky, and rendercheck
+     * can test this for you.
+     *
+     * This call is required if PrepareComposite() ever succeeds.
+     */
+    void        (*Composite) (PixmapPtr         pDst,
+                              int       srcX,
+                              int        srcY,
+                              int        maskX,
+                              int        maskY,
+                              int        dstX,
+                              int        dstY,
+                              int        width,
+                              int        height);
+
+    /**
+     * DoneComposite() finishes a set of Composite operations.
+     *
+     * @param pPixmap destination pixmap.
+     *
+     * The DoneComposite() call is called at the end of a series of consecutive
+     * Composite() calls following a successful PrepareComposite().  This allows
+     * drivers to finish up emitting drawing commands that were buffered, or
+     * clean up state from PrepareComposite().
+     *
+     * This call is required if PrepareComposite() ever succeeds.
+     */
+    void        (*DoneComposite) (PixmapPtr         pDst);
+    /** @} */
+
+    /**
+     * UploadToScreen() loads a rectangle of data from src into pDst.
+     *
+     * @param pDst destination pixmap
+     * @param x destination X coordinate.
+     * @param y destination Y coordinate
+     * @param width width of the rectangle to be copied
+     * @param height height of the rectangle to be copied
+     * @param src pointer to the beginning of the source data
+     * @param src_pitch pitch (in bytes) of the lines of source data.
+     *
+     * UploadToScreen() copies data in system memory beginning at src (with
+     * pitch src_pitch) into the destination pixmap from (x, y) to
+     * (x + width, y + height).  This is typically done with hostdata uploads,
+     * where the CPU sets up a blit command on the hardware with instructions
+     * that the blit data will be fed through some sort of aperture on the card.
+     *
+     * If UploadToScreen() is performed asynchronously, it is up to the driver
+     * to call exaMarkSync().  This is in contrast to most other acceleration
+     * calls in EXA.
+     *
+     * UploadToScreen() can aid in pixmap migration, but is most important for
+     * the performance of exaGlyphs() (antialiased font drawing) by allowing
+     * pipelining of data uploads, avoiding a sync of the card after each glyph.
+     * 
+     * @return TRUE if the driver successfully uploaded the data.  FALSE
+     * indicates that EXA should fall back to doing the upload in software.
+     *
+     * UploadToScreen() is not required, but is recommended if Composite
+     * acceleration is supported.
+     */
+    Bool        (*UploadToScreen) (PixmapPtr            pDst,
+				   int                  x,
+				   int                  y,
+				   int                  w,
+				   int                  h,
+                                   char                 *src,
+                                   int                  src_pitch);
+
+    /**
+     * UploadToScratch() is no longer used and will be removed next time the EXA
+     * major version needs to be bumped.
+     */
+    Bool        (*UploadToScratch) (PixmapPtr           pSrc,
+                                    PixmapPtr           pDst);
+
+    /**
+     * DownloadFromScreen() loads a rectangle of data from pSrc into dst
+     *
+     * @param pSrc source pixmap
+     * @param x source X coordinate.
+     * @param y source Y coordinate
+     * @param width width of the rectangle to be copied
+     * @param height height of the rectangle to be copied
+     * @param dst pointer to the beginning of the destination data
+     * @param dst_pitch pitch (in bytes) of the lines of destination data.
+     *
+     * DownloadFromScreen() copies data from offscreen memory in pSrc from
+     * (x, y) to (x + width, y + height), to system memory starting at
+     * dst (with pitch dst_pitch).  This would usually be done
+     * using scatter-gather DMA, supported by a DRM call, or by blitting to AGP
+     * and then synchronously reading from AGP.  Because the implementation
+     * might be synchronous, EXA leaves it up to the driver to call
+     * exaMarkSync() if DownloadFromScreen() was asynchronous.  This is in
+     * contrast to most other acceleration calls in EXA.
+     *
+     * DownloadFromScreen() can aid in the largest bottleneck in pixmap
+     * migration, which is the read from framebuffer when evicting pixmaps from
+     * framebuffer memory.  Thus, it is highly recommended, even though
+     * implementations are typically complicated.
+     * 
+     * @return TRUE if the driver successfully downloaded the data.  FALSE
+     * indicates that EXA should fall back to doing the download in software.
+     *
+     * DownloadFromScreen() is not required, but is highly recommended.
+     */
+    Bool (*DownloadFromScreen)(PixmapPtr pSrc,
+                               int x,  int y,
+                               int w,  int h,
+                               char *dst,  int dst_pitch);
+
+    /**
+     * MarkSync() requests that the driver mark a synchronization point,
+     * returning an driver-defined integer marker which could be requested for
+     * synchronization to later in WaitMarker().  This might be used in the
+     * future to avoid waiting for full hardware stalls before accessing pixmap
+     * data with the CPU, but is not important in the current incarnation of
+     * EXA.
+     *
+     * Note that drivers should call exaMarkSync() when they have done some
+     * acceleration, rather than their own MarkSync() handler, as otherwise EXA
+     * will be unaware of the driver's acceleration and not sync to it during
+     * fallbacks.
+     *
+     * MarkSync() is optional.
+     */
+    int		(*MarkSync)   (ScreenPtr pScreen);
+
+    /**
+     * WaitMarker() waits for all rendering before the given marker to have
+     * completed.  If the driver does not implement MarkSync(), marker is
+     * meaningless, and all rendering by the hardware should be completed before
+     * WaitMarker() returns.
+     *
+     * Note that drivers should call exaWaitSync() to wait for all acceleration
+     * to finish, as otherwise EXA will be unaware of the driver having
+     * synchronized, resulting in excessive WaitMarker() calls.
+     *
+     * WaitMarker() is required of all drivers.
+     */
+    void	(*WaitMarker) (ScreenPtr pScreen, int marker);
+
+    /** @{ */
+    /**
+     * PrepareAccess() is called before CPU access to an offscreen pixmap.
+     *
+     * @param pPix the pixmap being accessed
+     * @param index the index of the pixmap being accessed.
+     *
+     * PrepareAccess() will be called before CPU access to an offscreen pixmap.
+     * This can be used to set up hardware surfaces for byteswapping or
+     * untiling, or to adjust the pixmap's devPrivate.ptr for the purpose of
+     * making CPU access use a different aperture.
+     *
+     * The index is one of #EXA_PREPARE_DEST, #EXA_PREPARE_SRC,
+     * #EXA_PREPARE_MASK, #EXA_PREPARE_AUX_DEST, #EXA_PREPARE_AUX_SRC, or
+     * #EXA_PREPARE_AUX_MASK. Since only up to #EXA_NUM_PREPARE_INDICES pixmaps
+     * will have PrepareAccess() called on them per operation, drivers can have
+     * a small, statically-allocated space to maintain state for PrepareAccess()
+     * and FinishAccess() in.  Note that PrepareAccess() is only called once per
+     * pixmap and operation, regardless of whether the pixmap is used as a
+     * destination and/or source, and the index may not reflect the usage.
+     *
+     * PrepareAccess() may fail.  An example might be the case of hardware that
+     * can set up 1 or 2 surfaces for CPU access, but not 3.  If PrepareAccess()
+     * fails, EXA will migrate the pixmap to system memory.
+     * DownloadFromScreen() must be implemented and must not fail if a driver
+     * wishes to fail in PrepareAccess().  PrepareAccess() must not fail when
+     * pPix is the visible screen, because the visible screen can not be
+     * migrated.
+     *
+     * @return TRUE if PrepareAccess() successfully prepared the pixmap for CPU
+     * drawing.
+     * @return FALSE if PrepareAccess() is unsuccessful and EXA should use
+     * DownloadFromScreen() to migate the pixmap out.
+     */
+    Bool	(*PrepareAccess)(PixmapPtr pPix, int index);
+
+    /**
+     * FinishAccess() is called after CPU access to an offscreen pixmap.
+     *
+     * @param pPix the pixmap being accessed
+     * @param index the index of the pixmap being accessed.
+     *
+     * FinishAccess() will be called after finishing CPU access of an offscreen
+     * pixmap set up by PrepareAccess().  Note that the FinishAccess() will not be
+     * called if PrepareAccess() failed and the pixmap was migrated out.
+     */
+    void	(*FinishAccess)(PixmapPtr pPix, int index);
+
+    /**
+     * PixmapIsOffscreen() is an optional driver replacement to
+     * exaPixmapHasGpuCopy(). Set to NULL if you want the standard behaviour
+     * of exaPixmapHasGpuCopy().
+     *
+     * @param pPix the pixmap
+     * @return TRUE if the given drawable is in framebuffer memory.
+     *
+     * exaPixmapHasGpuCopy() is used to determine if a pixmap is in offscreen
+     * memory, meaning that acceleration could probably be done to it, and that it
+     * will need to be wrapped by PrepareAccess()/FinishAccess() when accessing it
+     * with the CPU.
+     *
+     *
+     */
+    Bool	(*PixmapIsOffscreen)(PixmapPtr pPix);
+
+	/** @name PrepareAccess() and FinishAccess() indices
+	 * @{
+	 */
+	/**
+	 * EXA_PREPARE_DEST is the index for a pixmap that may be drawn to or
+	 * read from.
+	 */ 
+	#define EXA_PREPARE_DEST	0
+	/**
+	 * EXA_PREPARE_SRC is the index for a pixmap that may be read from
+	 */
+	#define EXA_PREPARE_SRC		1
+	/**
+	 * EXA_PREPARE_SRC is the index for a second pixmap that may be read
+	 * from.
+	 */
+	#define EXA_PREPARE_MASK	2
+	/**
+	 * EXA_PREPARE_AUX* are additional indices for other purposes, e.g.
+	 * separate alpha maps with Composite operations.
+	 */
+	#define EXA_PREPARE_AUX_DEST	3
+	#define EXA_PREPARE_AUX_SRC	4
+	#define EXA_PREPARE_AUX_MASK	5
+	#define EXA_NUM_PREPARE_INDICES	6
+	/** @} */
+
+    /**
+     * maxPitchPixels controls the pitch limitation for rendering from
+     * the card.
+     * The driver should never receive a request for rendering a pixmap
+     * that has a pitch (in pixels) beyond maxPitchPixels.
+     *
+     * Setting this field is optional -- if your hardware doesn't have
+     * a pitch limitation in pixels, don't set this. If neither this value
+     * nor maxPitchBytes is set, then maxPitchPixels is set to maxX.
+     * If set, it must not be smaller than maxX.
+     *
+     * @sa maxPitchBytes
+     */
+    int maxPitchPixels;
+
+    /**
+     * maxPitchBytes controls the pitch limitation for rendering from
+     * the card.
+     * The driver should never receive a request for rendering a pixmap
+     * that has a pitch (in bytes) beyond maxPitchBytes.
+     *
+     * Setting this field is optional -- if your hardware doesn't have
+     * a pitch limitation in bytes, don't set this.
+     * If set, it must not be smaller than maxX * 4.
+     * There's no default value for maxPitchBytes.
+     *
+     * @sa maxPitchPixels
+     */
+    int maxPitchBytes;
+
+    /* Hooks to allow driver to its own pixmap memory management */
+    void *(*CreatePixmap)(ScreenPtr pScreen, int size, int align);
+    void (*DestroyPixmap)(ScreenPtr pScreen, void *driverPriv);
+    /**
+     * Returning a pixmap with non-NULL devPrivate.ptr implies a pixmap which is
+     * not offscreen, which will never be accelerated and Prepare/FinishAccess won't
+     * be called.
+     */
+    Bool (*ModifyPixmapHeader)(PixmapPtr pPixmap, int width, int height,
+                              int depth, int bitsPerPixel, int devKind,
+                              pointer pPixData);
+
+    /* hooks for drivers with tiling support:
+     * driver MUST fill out new_fb_pitch with valid pitch of pixmap
+     */
+    void *(*CreatePixmap2)(ScreenPtr pScreen, int width, int height,
+			   int depth, int usage_hint, int bitsPerPixel,
+			   int *new_fb_pitch);
+    /** @} */
+} ExaDriverRec, *ExaDriverPtr;
+
+/** @name EXA driver flags
+ * @{
+ */
+/**
+ * EXA_OFFSCREEN_PIXMAPS indicates to EXA that the driver can support 
+ * offscreen pixmaps.
+ */
+#define EXA_OFFSCREEN_PIXMAPS		(1 << 0)
+
+/**
+ * EXA_OFFSCREEN_ALIGN_POT indicates to EXA that the driver needs pixmaps
+ * to have a power-of-two pitch.
+ */
+#define EXA_OFFSCREEN_ALIGN_POT		(1 << 1)
+
+/**
+ * EXA_TWO_BITBLT_DIRECTIONS indicates to EXA that the driver can only
+ * support copies that are (left-to-right, top-to-bottom) or
+ * (right-to-left, bottom-to-top).
+ */
+#define EXA_TWO_BITBLT_DIRECTIONS	(1 << 2)
+
+/**
+ * EXA_HANDLES_PIXMAPS indicates to EXA that the driver can handle
+ * all pixmap addressing and migration.
+ */
+#define EXA_HANDLES_PIXMAPS             (1 << 3)
+
+/**
+ * EXA_SUPPORTS_PREPARE_AUX indicates to EXA that the driver can handle the
+ * EXA_PREPARE_AUX* indices in the Prepare/FinishAccess hooks. If there are no
+ * such hooks, this flag has no effect.
+ */
+#define EXA_SUPPORTS_PREPARE_AUX        (1 << 4)
+
+/**
+ * EXA_SUPPORTS_OFFSCREEN_OVERLAPS indicates to EXA that the driver Copy hooks
+ * can handle the source and destination occupying overlapping offscreen memory
+ * areas. This allows the offscreen memory defragmentation code to defragment
+ * areas where the defragmented position overlaps the fragmented position.
+ *
+ * Typically this is supported by traditional 2D engines but not by 3D engines.
+ */
+#define EXA_SUPPORTS_OFFSCREEN_OVERLAPS (1 << 5)
+
+/**
+ * EXA_MIXED_PIXMAPS will hide unacceleratable pixmaps from drivers and manage the
+ * problem known software fallbacks like trapezoids. This only migrates pixmaps one way
+ * into a driver pixmap and then pins it.
+ */
+#define EXA_MIXED_PIXMAPS (1 << 6)
+
+/** @} */
+
+/* in exa.c */
+extern _X_EXPORT ExaDriverPtr
+exaDriverAlloc(void);
+
+extern _X_EXPORT Bool
+exaDriverInit(ScreenPtr      pScreen,
+              ExaDriverPtr   pScreenInfo);
+
+extern _X_EXPORT void
+exaDriverFini(ScreenPtr      pScreen);
+
+extern _X_EXPORT void
+exaMarkSync(ScreenPtr pScreen);
+extern _X_EXPORT void
+exaWaitSync(ScreenPtr pScreen);
+
+extern _X_EXPORT unsigned long
+exaGetPixmapOffset(PixmapPtr pPix);
+
+extern _X_EXPORT unsigned long
+exaGetPixmapPitch(PixmapPtr pPix);
+
+extern _X_EXPORT unsigned long
+exaGetPixmapSize(PixmapPtr pPix);
+
+extern _X_EXPORT void *
+exaGetPixmapDriverPrivate(PixmapPtr p);
+
+
+/* in exa_offscreen.c */
+extern _X_EXPORT ExaOffscreenArea *
+exaOffscreenAlloc(ScreenPtr pScreen, int size, int align,
+                  Bool locked,
+                  ExaOffscreenSaveProc save,
+                  pointer privData);
+
+extern _X_EXPORT ExaOffscreenArea *
+exaOffscreenFree(ScreenPtr pScreen, ExaOffscreenArea *area);
+
+extern _X_EXPORT void
+ExaOffscreenMarkUsed (PixmapPtr pPixmap);
+
+extern _X_EXPORT void
+exaEnableDisableFBAccess (int index, Bool enable);
+
+extern _X_EXPORT Bool
+exaDrawableIsOffscreen (DrawablePtr pDrawable);
+
+/* in exa.c */
+extern _X_EXPORT void
+exaMoveInPixmap (PixmapPtr pPixmap);
+
+extern _X_EXPORT void
+exaMoveOutPixmap (PixmapPtr pPixmap);
+
+
+/* in exa_unaccel.c */
+extern _X_EXPORT CARD32
+exaGetPixmapFirstPixel (PixmapPtr pPixmap);
+
+
+/**
+ * Returns TRUE if the given planemask covers all the significant bits in the
+ * pixel values for pDrawable.
+ */
+#define EXA_PM_IS_SOLID(_pDrawable, _pm) \
+	(((_pm) & FbFullMask((_pDrawable)->depth)) == \
+	 FbFullMask((_pDrawable)->depth))
+
+#endif /* EXA_H */
diff --git a/exa/exa_accel.c b/exa/exa_accel.c
new file mode 100644
index 0000000..b4c0f83
--- /dev/null
+++ b/exa/exa_accel.c
@@ -0,0 +1,1306 @@
+/*
+ * Copyright © 2001 Keith Packard
+ *
+ * Partly based on code that is Copyright © The XFree86 Project Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *    Michel Dänzer <michel@tungstengraphics.com>
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+#include "exa_priv.h"
+#include <X11/fonts/fontstruct.h>
+#include "dixfontstr.h"
+#include "exa.h"
+
+static void
+exaFillSpans(DrawablePtr pDrawable, GCPtr pGC, int n,
+	     DDXPointPtr ppt, int *pwidth, int fSorted)
+{
+    ScreenPtr	    pScreen = pDrawable->pScreen;
+    ExaScreenPriv (pScreen);
+    RegionPtr	    pClip = fbGetCompositeClip(pGC);
+    PixmapPtr	    pPixmap = exaGetDrawablePixmap (pDrawable);
+    ExaPixmapPriv (pPixmap);
+    BoxPtr	    pextent, pbox;
+    int		    nbox;
+    int		    extentX1, extentX2, extentY1, extentY2;
+    int		    fullX1, fullX2, fullY1;
+    int		    partX1, partX2;
+    int		    off_x, off_y;
+
+    if (pExaScr->fallback_counter ||
+	pExaScr->swappedOut ||
+	pGC->fillStyle != FillSolid ||
+	pExaPixmap->accel_blocked)
+    {
+	ExaCheckFillSpans (pDrawable, pGC, n, ppt, pwidth, fSorted);
+	return;
+    }
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pPixmap;
+	pixmaps[0].pReg = NULL;
+
+	exaDoMigration (pixmaps, 1, TRUE);
+    }
+
+    if (!(pPixmap = exaGetOffscreenPixmap (pDrawable, &off_x, &off_y)) ||
+	!(*pExaScr->info->PrepareSolid) (pPixmap,
+					 pGC->alu,
+					 pGC->planemask,
+					 pGC->fgPixel))
+    {
+	ExaCheckFillSpans (pDrawable, pGC, n, ppt, pwidth, fSorted);
+	return;
+    }
+
+    pextent = RegionExtents(pClip);
+    extentX1 = pextent->x1;
+    extentY1 = pextent->y1;
+    extentX2 = pextent->x2;
+    extentY2 = pextent->y2;
+    while (n--)
+    {
+	fullX1 = ppt->x;
+	fullY1 = ppt->y;
+	fullX2 = fullX1 + (int) *pwidth;
+	ppt++;
+	pwidth++;
+
+	if (fullY1 < extentY1 || extentY2 <= fullY1)
+	    continue;
+
+	if (fullX1 < extentX1)
+	    fullX1 = extentX1;
+
+	if (fullX2 > extentX2)
+	    fullX2 = extentX2;
+
+	if (fullX1 >= fullX2)
+	    continue;
+
+	nbox = RegionNumRects (pClip);
+	if (nbox == 1)
+	{
+	    (*pExaScr->info->Solid) (pPixmap,
+				     fullX1 + off_x, fullY1 + off_y,
+				     fullX2 + off_x, fullY1 + 1 + off_y);
+	}
+	else
+	{
+	    pbox = RegionRects(pClip);
+	    while(nbox--)
+	    {
+		if (pbox->y1 <= fullY1 && fullY1 < pbox->y2)
+		{
+		    partX1 = pbox->x1;
+		    if (partX1 < fullX1)
+			partX1 = fullX1;
+		    partX2 = pbox->x2;
+		    if (partX2 > fullX2)
+			partX2 = fullX2;
+		    if (partX2 > partX1) {
+			(*pExaScr->info->Solid) (pPixmap,
+						 partX1 + off_x, fullY1 + off_y,
+						 partX2 + off_x, fullY1 + 1 + off_y);
+		    }
+		}
+		pbox++;
+	    }
+	}
+    }
+    (*pExaScr->info->DoneSolid) (pPixmap);
+    exaMarkSync(pScreen);
+}
+
+static Bool
+exaDoPutImage (DrawablePtr pDrawable, GCPtr pGC, int depth, int x, int y,
+	       int w, int h, int format, char *bits, int src_stride)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    PixmapPtr pPix = exaGetDrawablePixmap (pDrawable);
+    ExaPixmapPriv(pPix);
+    RegionPtr pClip;
+    BoxPtr pbox;
+    int nbox;
+    int xoff, yoff;
+    int bpp = pDrawable->bitsPerPixel;
+    Bool ret = TRUE;
+
+    if (pExaScr->fallback_counter || pExaPixmap->accel_blocked || !pExaScr->info->UploadToScreen)
+	return FALSE;
+
+    /* If there's a system copy, we want to save the result there */
+    if (pExaPixmap->pDamage)
+	return FALSE;
+
+    /* Don't bother with under 8bpp, XYPixmaps. */
+    if (format != ZPixmap || bpp < 8)
+	return FALSE;
+
+    /* Only accelerate copies: no rop or planemask. */
+    if (!EXA_PM_IS_SOLID(pDrawable, pGC->planemask) || pGC->alu != GXcopy)
+	return FALSE;
+
+    if (pExaScr->swappedOut)
+	return FALSE;
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pPix;
+	pixmaps[0].pReg = DamagePendingRegion(pExaPixmap->pDamage);
+
+	exaDoMigration (pixmaps, 1, TRUE);
+    }
+
+    pPix = exaGetOffscreenPixmap (pDrawable, &xoff, &yoff);
+
+    if (!pPix)
+	return FALSE;
+
+    x += pDrawable->x;
+    y += pDrawable->y;
+
+    pClip = fbGetCompositeClip(pGC);
+    for (nbox = RegionNumRects(pClip),
+	 pbox = RegionRects(pClip);
+	 nbox--;
+	 pbox++)
+    {
+	int x1 = x;
+	int y1 = y;
+	int x2 = x + w;
+	int y2 = y + h;
+	char *src;
+	Bool ok;
+
+	if (x1 < pbox->x1)
+	    x1 = pbox->x1;
+	if (y1 < pbox->y1)
+	    y1 = pbox->y1;
+	if (x2 > pbox->x2)
+	    x2 = pbox->x2;
+	if (y2 > pbox->y2)
+	    y2 = pbox->y2;
+	if (x1 >= x2 || y1 >= y2)
+	    continue;
+
+	src = bits + (y1 - y) * src_stride + (x1 - x) * (bpp / 8);
+	ok = pExaScr->info->UploadToScreen(pPix, x1 + xoff, y1 + yoff,
+					   x2 - x1, y2 - y1, src, src_stride);
+	/* We have to fall back completely, and ignore what has already been completed.
+	 * Messing with the fb layer directly like we used to is completely unacceptable.
+	 */
+	if (!ok) {
+	    ret = FALSE;
+	    break;
+	}
+    }
+
+    if (ret)
+	exaMarkSync(pDrawable->pScreen);
+
+    return ret;
+}
+
+static void
+exaPutImage (DrawablePtr pDrawable, GCPtr pGC, int depth, int x, int y,
+	     int w, int h, int leftPad, int format, char *bits)
+{
+    if (!exaDoPutImage(pDrawable, pGC, depth, x, y, w, h, format, bits,
+		       PixmapBytePad(w, pDrawable->depth)))
+	ExaCheckPutImage(pDrawable, pGC, depth, x, y, w, h, leftPad, format,
+			 bits);
+}
+
+static Bool inline
+exaCopyNtoNTwoDir (DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable,
+		   GCPtr pGC, BoxPtr pbox, int nbox, int dx, int dy)
+{
+    ExaScreenPriv (pDstDrawable->pScreen);
+    PixmapPtr pSrcPixmap, pDstPixmap;
+    int src_off_x, src_off_y, dst_off_x, dst_off_y;
+    int dirsetup;
+
+    /* Need to get both pixmaps to call the driver routines */
+    pSrcPixmap = exaGetOffscreenPixmap (pSrcDrawable, &src_off_x, &src_off_y);
+    pDstPixmap = exaGetOffscreenPixmap (pDstDrawable, &dst_off_x, &dst_off_y);
+    if (!pSrcPixmap || !pDstPixmap)
+	return FALSE;
+
+    /*
+     * Now the case of a chip that only supports xdir = ydir = 1 or
+     * xdir = ydir = -1, but we have xdir != ydir.
+     */
+    dirsetup = 0;	/* No direction set up yet. */
+    for (; nbox; pbox++, nbox--) {
+	if (dx >= 0 && (src_off_y + pbox->y1 + dy) != pbox->y1) {
+	    /* Do a xdir = ydir = -1 blit instead. */
+	    if (dirsetup != -1) {
+		if (dirsetup != 0)
+		    pExaScr->info->DoneCopy(pDstPixmap);
+		dirsetup = -1;
+		if (!(*pExaScr->info->PrepareCopy)(pSrcPixmap,
+						   pDstPixmap,
+						   -1, -1,
+						   pGC ? pGC->alu : GXcopy,
+						   pGC ? pGC->planemask :
+							 FB_ALLONES))
+		    return FALSE;
+	    }
+	    (*pExaScr->info->Copy)(pDstPixmap,
+				   src_off_x + pbox->x1 + dx,
+				   src_off_y + pbox->y1 + dy,
+				   dst_off_x + pbox->x1,
+				   dst_off_y + pbox->y1,
+				   pbox->x2 - pbox->x1,
+				   pbox->y2 - pbox->y1);
+	} else if (dx < 0 && (src_off_y + pbox->y1 + dy) != pbox->y1) {
+	    /* Do a xdir = ydir = 1 blit instead. */
+	    if (dirsetup != 1) {
+		if (dirsetup != 0)
+		    pExaScr->info->DoneCopy(pDstPixmap);
+		dirsetup = 1;
+		if (!(*pExaScr->info->PrepareCopy)(pSrcPixmap,
+						   pDstPixmap,
+						   1, 1,
+						   pGC ? pGC->alu : GXcopy,
+						   pGC ? pGC->planemask :
+							 FB_ALLONES))
+		    return FALSE;
+	    }
+	    (*pExaScr->info->Copy)(pDstPixmap,
+				   src_off_x + pbox->x1 + dx,
+				   src_off_y + pbox->y1 + dy,
+				   dst_off_x + pbox->x1,
+				   dst_off_y + pbox->y1,
+				   pbox->x2 - pbox->x1,
+				   pbox->y2 - pbox->y1);
+	} else if (dx >= 0) {
+	    /*
+	     * xdir = 1, ydir = -1.
+	     * Perform line-by-line xdir = ydir = 1 blits, going up.
+	     */
+	    int i;
+	    if (dirsetup != 1) {
+		if (dirsetup != 0)
+		    pExaScr->info->DoneCopy(pDstPixmap);
+		dirsetup = 1;
+		if (!(*pExaScr->info->PrepareCopy)(pSrcPixmap,
+						   pDstPixmap,
+						   1, 1,
+						   pGC ? pGC->alu : GXcopy,
+						   pGC ? pGC->planemask :
+							 FB_ALLONES))
+		    return FALSE;
+	    }
+	    for (i = pbox->y2 - pbox->y1 - 1; i >= 0; i--)
+		(*pExaScr->info->Copy)(pDstPixmap,
+				       src_off_x + pbox->x1 + dx,
+				       src_off_y + pbox->y1 + dy + i,
+				       dst_off_x + pbox->x1,
+				       dst_off_y + pbox->y1 + i,
+				       pbox->x2 - pbox->x1, 1);
+	} else {
+	    /*
+	     * xdir = -1, ydir = 1.
+	     * Perform line-by-line xdir = ydir = -1 blits, going down.
+	     */
+	    int i;
+	    if (dirsetup != -1) {
+		if (dirsetup != 0)
+		    pExaScr->info->DoneCopy(pDstPixmap);
+		dirsetup = -1;
+		if (!(*pExaScr->info->PrepareCopy)(pSrcPixmap,
+						   pDstPixmap,
+						   -1, -1,
+						   pGC ? pGC->alu : GXcopy,
+						   pGC ? pGC->planemask :
+							 FB_ALLONES))
+		    return FALSE;
+	    }
+	    for (i = 0; i < pbox->y2 - pbox->y1; i++)
+		(*pExaScr->info->Copy)(pDstPixmap,
+				       src_off_x + pbox->x1 + dx,
+				       src_off_y + pbox->y1 + dy + i,
+				       dst_off_x + pbox->x1,
+				       dst_off_y + pbox->y1 + i,
+				       pbox->x2 - pbox->x1, 1);
+	}
+    }
+    if (dirsetup != 0)
+	pExaScr->info->DoneCopy(pDstPixmap);
+    exaMarkSync(pDstDrawable->pScreen);
+    return TRUE;
+}
+
+Bool
+exaHWCopyNtoN (DrawablePtr    pSrcDrawable,
+	     DrawablePtr    pDstDrawable,
+	     GCPtr	    pGC,
+	     BoxPtr	    pbox,
+	     int	    nbox,
+	     int	    dx,
+	     int	    dy,
+	     Bool	    reverse,
+	     Bool	    upsidedown)
+{
+    ExaScreenPriv (pDstDrawable->pScreen);
+    PixmapPtr pSrcPixmap, pDstPixmap;
+    ExaPixmapPrivPtr pSrcExaPixmap, pDstExaPixmap;
+    int	    src_off_x, src_off_y;
+    int	    dst_off_x, dst_off_y;
+    RegionPtr srcregion = NULL, dstregion = NULL;
+    xRectangle *rects;
+    Bool ret = TRUE;
+
+    /* avoid doing copy operations if no boxes */
+    if (nbox == 0)
+	return TRUE;
+
+    pSrcPixmap = exaGetDrawablePixmap (pSrcDrawable);
+    pDstPixmap = exaGetDrawablePixmap (pDstDrawable);
+
+    exaGetDrawableDeltas (pSrcDrawable, pSrcPixmap, &src_off_x, &src_off_y);
+    exaGetDrawableDeltas (pDstDrawable, pDstPixmap, &dst_off_x, &dst_off_y);
+
+    rects = malloc(nbox * sizeof(xRectangle));
+
+    if (rects) {
+	int i;
+	int ordering;
+
+	for (i = 0; i < nbox; i++) {
+	    rects[i].x = pbox[i].x1 + dx + src_off_x;
+	    rects[i].y = pbox[i].y1 + dy + src_off_y;
+	    rects[i].width = pbox[i].x2 - pbox[i].x1;
+	    rects[i].height = pbox[i].y2 - pbox[i].y1;
+	}
+
+	/* This must match the RegionCopy() logic for reversing rect order */
+	if (nbox == 1 || (dx > 0 && dy > 0) ||
+	    (pDstDrawable != pSrcDrawable &&
+	     (pDstDrawable->type != DRAWABLE_WINDOW ||
+	      pSrcDrawable->type != DRAWABLE_WINDOW)))
+	    ordering = CT_YXBANDED;
+	else
+	    ordering = CT_UNSORTED;
+
+	srcregion  = RegionFromRects(nbox, rects, ordering);
+	free(rects);
+
+	if (!pGC || !exaGCReadsDestination(pDstDrawable, pGC->planemask,
+					   pGC->fillStyle, pGC->alu,
+					   pGC->clientClipType)) {
+	    dstregion = RegionCreate(NullBox, 0);
+	    RegionCopy(dstregion, srcregion);
+	    RegionTranslate(dstregion, dst_off_x - dx - src_off_x,
+			     dst_off_y - dy - src_off_y);
+	}
+    }
+
+
+    pSrcExaPixmap = ExaGetPixmapPriv (pSrcPixmap);
+    pDstExaPixmap = ExaGetPixmapPriv (pDstPixmap);
+
+    /* Check whether the accelerator can use this pixmap.
+     * If the pitch of the pixmaps is out of range, there's nothing
+     * we can do but fall back to software rendering.
+     */
+    if (pSrcExaPixmap->accel_blocked & EXA_RANGE_PITCH ||
+        pDstExaPixmap->accel_blocked & EXA_RANGE_PITCH)
+	goto fallback;
+
+    /* If the width or the height of either of the pixmaps
+     * is out of range, check whether the boxes are actually out of the
+     * addressable range as well. If they aren't, we can still do
+     * the copying in hardware.
+     */
+    if (pSrcExaPixmap->accel_blocked || pDstExaPixmap->accel_blocked) {
+        int i;
+
+        for (i = 0; i < nbox; i++) {
+            /* src */
+            if ((pbox[i].x2 + dx + src_off_x) >= pExaScr->info->maxX ||
+                (pbox[i].y2 + dy + src_off_y) >= pExaScr->info->maxY)
+                goto fallback;
+
+            /* dst */
+            if ((pbox[i].x2 + dst_off_x) >= pExaScr->info->maxX ||
+                (pbox[i].y2 + dst_off_y) >= pExaScr->info->maxY)
+                goto fallback;
+        }
+    }
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[2];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pDstPixmap;
+	pixmaps[0].pReg = dstregion;
+	pixmaps[1].as_dst = FALSE;
+	pixmaps[1].as_src = TRUE;
+	pixmaps[1].pPix = pSrcPixmap;
+	pixmaps[1].pReg = srcregion;
+
+	exaDoMigration (pixmaps, 2, TRUE);
+    }
+
+    /* Mixed directions must be handled specially if the card is lame */
+    if ((pExaScr->info->flags & EXA_TWO_BITBLT_DIRECTIONS) &&
+	reverse != upsidedown) {
+	if (exaCopyNtoNTwoDir(pSrcDrawable, pDstDrawable, pGC, pbox, nbox,
+			       dx, dy))
+	    goto out;
+	goto fallback;
+    }
+
+    if (exaPixmapHasGpuCopy(pDstPixmap)) {
+	/* Normal blitting. */
+	if (exaPixmapHasGpuCopy(pSrcPixmap)) {
+	    if (!(*pExaScr->info->PrepareCopy) (pSrcPixmap, pDstPixmap, reverse ? -1 : 1,
+						upsidedown ? -1 : 1,
+						pGC ? pGC->alu : GXcopy,
+						pGC ? pGC->planemask : FB_ALLONES)) {
+		goto fallback;
+	    }
+
+	    while (nbox--)
+	    {
+		(*pExaScr->info->Copy) (pDstPixmap,
+					pbox->x1 + dx + src_off_x,
+					pbox->y1 + dy + src_off_y,
+					pbox->x1 + dst_off_x, pbox->y1 + dst_off_y,
+					pbox->x2 - pbox->x1, pbox->y2 - pbox->y1);
+		pbox++;
+	    }
+
+	    (*pExaScr->info->DoneCopy) (pDstPixmap);
+	    exaMarkSync (pDstDrawable->pScreen);
+	/* UTS: mainly for SHM PutImage's secondary path.
+	 *
+	 * Only taking this path for directly accessible pixmaps.
+	 */
+	} else if (!pDstExaPixmap->pDamage && pSrcExaPixmap->sys_ptr) {
+	    int bpp = pSrcDrawable->bitsPerPixel;
+	    int src_stride = exaGetPixmapPitch(pSrcPixmap);
+	    CARD8 *src = NULL;
+
+	    if (!pExaScr->info->UploadToScreen)
+		goto fallback;
+
+	    if (pSrcDrawable->bitsPerPixel != pDstDrawable->bitsPerPixel)
+		goto fallback;
+
+	    if (pSrcDrawable->bitsPerPixel < 8)
+		goto fallback;
+
+	    if (pGC && !(pGC->alu == GXcopy && EXA_PM_IS_SOLID(pSrcDrawable,  pGC->planemask)))
+		goto fallback;
+
+	    while (nbox--)
+	    {
+		src = pSrcExaPixmap->sys_ptr + (pbox->y1 + dy + src_off_y) * src_stride + (pbox->x1 + dx + src_off_x) * (bpp / 8);
+		if (!pExaScr->info->UploadToScreen(pDstPixmap, pbox->x1 + dst_off_x,
+				pbox->y1 + dst_off_y, pbox->x2 - pbox->x1, pbox->y2 - pbox->y1,
+				(char *) src, src_stride))
+		    goto fallback;
+
+		pbox++;
+	    }
+	} else
+	    goto fallback;
+    } else
+	goto fallback;
+
+    goto out;
+
+fallback:
+    ret = FALSE;
+
+out:
+    if (dstregion) {
+	RegionUninit(dstregion);
+	RegionDestroy(dstregion);
+    }
+    if (srcregion) {
+	RegionUninit(srcregion);
+	RegionDestroy(srcregion);
+    }
+
+    return ret;
+}
+
+void
+exaCopyNtoN (DrawablePtr    pSrcDrawable,
+	     DrawablePtr    pDstDrawable,
+	     GCPtr	    pGC,
+	     BoxPtr	    pbox,
+	     int	    nbox,
+	     int	    dx,
+	     int	    dy,
+	     Bool	    reverse,
+	     Bool	    upsidedown,
+	     Pixel	    bitplane,
+	     void	    *closure)
+{
+    ExaScreenPriv(pDstDrawable->pScreen);
+
+    if (pExaScr->fallback_counter ||
+	    (pExaScr->fallback_flags & EXA_FALLBACK_COPYWINDOW))
+	return;
+
+    if (exaHWCopyNtoN(pSrcDrawable, pDstDrawable, pGC, pbox, nbox, dx, dy, reverse, upsidedown))
+	return;
+
+    /* This is a CopyWindow, it's cleaner to fallback at the original call. */
+    if (pExaScr->fallback_flags & EXA_ACCEL_COPYWINDOW) {
+	pExaScr->fallback_flags |= EXA_FALLBACK_COPYWINDOW;
+	return;
+    }
+
+    /* fallback */
+    ExaCheckCopyNtoN(pSrcDrawable, pDstDrawable, pGC, pbox, nbox, dx, dy, reverse, upsidedown, bitplane, closure);
+}
+
+RegionPtr
+exaCopyArea(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable, GCPtr pGC,
+	    int srcx, int srcy, int width, int height, int dstx, int dsty)
+{
+    ExaScreenPriv (pDstDrawable->pScreen);
+
+    if (pExaScr->fallback_counter || pExaScr->swappedOut) {
+        return  ExaCheckCopyArea(pSrcDrawable, pDstDrawable, pGC,
+                                 srcx, srcy, width, height, dstx, dsty);
+    }
+
+    return  miDoCopy (pSrcDrawable, pDstDrawable, pGC,
+                      srcx, srcy, width, height,
+                      dstx, dsty, exaCopyNtoN, 0, NULL);
+}
+
+static void
+exaPolyPoint(DrawablePtr pDrawable, GCPtr pGC, int mode, int npt,
+	     DDXPointPtr ppt)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    int i;
+    xRectangle *prect;
+
+    /* If we can't reuse the current GC as is, don't bother accelerating the
+     * points.
+     */
+    if (pExaScr->fallback_counter || pGC->fillStyle != FillSolid) {
+	ExaCheckPolyPoint(pDrawable, pGC, mode, npt, ppt);
+	return;
+    }
+
+    prect = malloc(sizeof(xRectangle) * npt);
+    for (i = 0; i < npt; i++) {
+	prect[i].x = ppt[i].x;
+	prect[i].y = ppt[i].y;
+	if (i > 0 && mode == CoordModePrevious) {
+	    prect[i].x += prect[i - 1].x;
+	    prect[i].y += prect[i - 1].y;
+	}
+	prect[i].width = 1;
+	prect[i].height = 1;
+    }
+    pGC->ops->PolyFillRect(pDrawable, pGC, npt, prect);
+    free(prect);
+}
+
+/**
+ * exaPolylines() checks if it can accelerate the lines as a group of
+ * horizontal or vertical lines (rectangles), and uses existing rectangle fill
+ * acceleration if so.
+ */
+static void
+exaPolylines(DrawablePtr pDrawable, GCPtr pGC, int mode, int npt,
+	     DDXPointPtr ppt)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    xRectangle *prect;
+    int x1, x2, y1, y2;
+    int i;
+
+    if (pExaScr->fallback_counter) {
+	ExaCheckPolylines(pDrawable, pGC, mode, npt, ppt);
+	return;
+    }
+
+    /* Don't try to do wide lines or non-solid fill style. */
+    if (pGC->lineWidth != 0 || pGC->lineStyle != LineSolid ||
+	pGC->fillStyle != FillSolid) {
+	ExaCheckPolylines(pDrawable, pGC, mode, npt, ppt);
+	return;
+    }
+
+    prect = malloc(sizeof(xRectangle) * (npt - 1));
+    x1 = ppt[0].x;
+    y1 = ppt[0].y;
+    /* If we have any non-horizontal/vertical, fall back. */
+    for (i = 0; i < npt - 1; i++) {
+	if (mode == CoordModePrevious) {
+	    x2 = x1 + ppt[i + 1].x;
+	    y2 = y1 + ppt[i + 1].y;
+	} else {
+	    x2 = ppt[i + 1].x;
+	    y2 = ppt[i + 1].y;
+	}
+
+	if (x1 != x2 && y1 != y2) {
+	    free(prect);
+	    ExaCheckPolylines(pDrawable, pGC, mode, npt, ppt);
+	    return;
+	}
+
+	if (x1 < x2) {
+	    prect[i].x = x1;
+	    prect[i].width = x2 - x1 + 1;
+	} else {
+	    prect[i].x = x2;
+	    prect[i].width = x1 - x2 + 1;
+	}
+	if (y1 < y2) {
+	    prect[i].y = y1;
+	    prect[i].height = y2 - y1 + 1;
+	} else {
+	    prect[i].y = y2;
+	    prect[i].height = y1 - y2 + 1;
+	}
+
+	x1 = x2;
+	y1 = y2;
+    }
+    pGC->ops->PolyFillRect(pDrawable, pGC, npt - 1, prect);
+    free(prect);
+}
+
+/**
+ * exaPolySegment() checks if it can accelerate the lines as a group of
+ * horizontal or vertical lines (rectangles), and uses existing rectangle fill
+ * acceleration if so.
+ */
+static void
+exaPolySegment (DrawablePtr pDrawable, GCPtr pGC, int nseg,
+		xSegment *pSeg)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    xRectangle *prect;
+    int i;
+
+    /* Don't try to do wide lines or non-solid fill style. */
+    if (pExaScr->fallback_counter || pGC->lineWidth != 0 ||
+	pGC->lineStyle != LineSolid || pGC->fillStyle != FillSolid)
+    {
+	ExaCheckPolySegment(pDrawable, pGC, nseg, pSeg);
+	return;
+    }
+
+    /* If we have any non-horizontal/vertical, fall back. */
+    for (i = 0; i < nseg; i++) {
+	if (pSeg[i].x1 != pSeg[i].x2 && pSeg[i].y1 != pSeg[i].y2) {
+	    ExaCheckPolySegment(pDrawable, pGC, nseg, pSeg);
+	    return;
+	}
+    }
+
+    prect = malloc(sizeof(xRectangle) * nseg);
+    for (i = 0; i < nseg; i++) {
+	if (pSeg[i].x1 < pSeg[i].x2) {
+	    prect[i].x = pSeg[i].x1;
+	    prect[i].width = pSeg[i].x2 - pSeg[i].x1 + 1;
+	} else {
+	    prect[i].x = pSeg[i].x2;
+	    prect[i].width = pSeg[i].x1 - pSeg[i].x2 + 1;
+	}
+	if (pSeg[i].y1 < pSeg[i].y2) {
+	    prect[i].y = pSeg[i].y1;
+	    prect[i].height = pSeg[i].y2 - pSeg[i].y1 + 1;
+	} else {
+	    prect[i].y = pSeg[i].y2;
+	    prect[i].height = pSeg[i].y1 - pSeg[i].y2 + 1;
+	}
+
+	/* don't paint last pixel */
+	if (pGC->capStyle == CapNotLast) {
+	    if (prect[i].width == 1)
+		prect[i].height--;
+	    else
+		prect[i].width--;
+	}
+    }
+    pGC->ops->PolyFillRect(pDrawable, pGC, nseg, prect);
+    free(prect);
+}
+
+static Bool exaFillRegionSolid (DrawablePtr pDrawable, RegionPtr pRegion,
+				Pixel pixel, CARD32 planemask, CARD32 alu,
+				unsigned int clientClipType);
+
+static void
+exaPolyFillRect(DrawablePtr pDrawable,
+		GCPtr	    pGC,
+		int	    nrect,
+		xRectangle  *prect)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    RegionPtr	    pClip = fbGetCompositeClip(pGC);
+    PixmapPtr	    pPixmap = exaGetDrawablePixmap(pDrawable);
+    ExaPixmapPriv (pPixmap);
+    register BoxPtr pbox;
+    BoxPtr	    pextent;
+    int		    extentX1, extentX2, extentY1, extentY2;
+    int		    fullX1, fullX2, fullY1, fullY2;
+    int		    partX1, partX2, partY1, partY2;
+    int		    xoff, yoff;
+    int		    xorg, yorg;
+    int		    n;
+    RegionPtr pReg = RegionFromRects(nrect, prect, CT_UNSORTED);
+
+    /* Compute intersection of rects and clip region */
+    RegionTranslate(pReg, pDrawable->x, pDrawable->y);
+    RegionIntersect(pReg, pClip, pReg);
+
+    if (!RegionNumRects(pReg)) {
+	goto out;
+    }
+
+    exaGetDrawableDeltas(pDrawable, pPixmap, &xoff, &yoff);
+
+    if (pExaScr->fallback_counter || pExaScr->swappedOut ||
+	    pExaPixmap->accel_blocked)
+    {
+	goto fallback;
+    }
+
+    /* For ROPs where overlaps don't matter, convert rectangles to region and
+     * call exaFillRegion{Solid,Tiled}.
+     */
+    if ((pGC->fillStyle == FillSolid || pGC->fillStyle == FillTiled) &&
+	(nrect == 1 || pGC->alu == GXcopy || pGC->alu == GXclear ||
+	 pGC->alu == GXnoop || pGC->alu == GXcopyInverted ||
+	 pGC->alu == GXset)) {
+	if (((pGC->fillStyle == FillSolid || pGC->tileIsPixel) &&
+	     exaFillRegionSolid(pDrawable, pReg, pGC->fillStyle == FillSolid ?
+				pGC->fgPixel : pGC->tile.pixel,	pGC->planemask,
+				pGC->alu, pGC->clientClipType)) ||
+	    (pGC->fillStyle == FillTiled && !pGC->tileIsPixel &&
+	     exaFillRegionTiled(pDrawable, pReg, pGC->tile.pixmap, &pGC->patOrg,
+				pGC->planemask, pGC->alu,
+				pGC->clientClipType))) {
+	    goto out;
+	}
+    }
+
+    if (pGC->fillStyle != FillSolid &&
+	!(pGC->tileIsPixel && pGC->fillStyle == FillTiled))
+    {
+	goto fallback;
+    }
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pPixmap;
+	pixmaps[0].pReg = NULL;
+
+	exaDoMigration (pixmaps, 1, TRUE);
+    }
+
+    if (!exaPixmapHasGpuCopy (pPixmap) ||
+	!(*pExaScr->info->PrepareSolid) (pPixmap,
+					 pGC->alu,
+					 pGC->planemask,
+					 pGC->fgPixel))
+    {
+fallback:
+	ExaCheckPolyFillRect (pDrawable, pGC, nrect, prect);
+	goto out;
+    }
+
+    xorg = pDrawable->x;
+    yorg = pDrawable->y;
+
+    pextent = RegionExtents(pClip);
+    extentX1 = pextent->x1;
+    extentY1 = pextent->y1;
+    extentX2 = pextent->x2;
+    extentY2 = pextent->y2;
+    while (nrect--)
+    {
+	fullX1 = prect->x + xorg;
+	fullY1 = prect->y + yorg;
+	fullX2 = fullX1 + (int) prect->width;
+	fullY2 = fullY1 + (int) prect->height;
+	prect++;
+
+	if (fullX1 < extentX1)
+	    fullX1 = extentX1;
+
+	if (fullY1 < extentY1)
+	    fullY1 = extentY1;
+
+	if (fullX2 > extentX2)
+	    fullX2 = extentX2;
+
+	if (fullY2 > extentY2)
+	    fullY2 = extentY2;
+
+	if ((fullX1 >= fullX2) || (fullY1 >= fullY2))
+	    continue;
+	n = RegionNumRects (pClip);
+	if (n == 1)
+	{
+	    (*pExaScr->info->Solid) (pPixmap,
+				     fullX1 + xoff, fullY1 + yoff,
+				     fullX2 + xoff, fullY2 + yoff);
+	}
+	else
+	{
+	    pbox = RegionRects(pClip);
+	    /*
+	     * clip the rectangle to each box in the clip region
+	     * this is logically equivalent to calling Intersect(),
+	     * but rectangles may overlap each other here.
+	     */
+	    while(n--)
+	    {
+		partX1 = pbox->x1;
+		if (partX1 < fullX1)
+		    partX1 = fullX1;
+		partY1 = pbox->y1;
+		if (partY1 < fullY1)
+		    partY1 = fullY1;
+		partX2 = pbox->x2;
+		if (partX2 > fullX2)
+		    partX2 = fullX2;
+		partY2 = pbox->y2;
+		if (partY2 > fullY2)
+		    partY2 = fullY2;
+
+		pbox++;
+
+		if (partX1 < partX2 && partY1 < partY2) {
+		    (*pExaScr->info->Solid) (pPixmap,
+					     partX1 + xoff, partY1 + yoff,
+					     partX2 + xoff, partY2 + yoff);
+		}
+	    }
+	}
+    }
+    (*pExaScr->info->DoneSolid) (pPixmap);
+    exaMarkSync(pDrawable->pScreen);
+
+out:
+    RegionUninit(pReg);
+    RegionDestroy(pReg);
+}
+
+const GCOps exaOps = {
+    exaFillSpans,
+    ExaCheckSetSpans,
+    exaPutImage,
+    exaCopyArea,
+    ExaCheckCopyPlane,
+    exaPolyPoint,
+    exaPolylines,
+    exaPolySegment,
+    miPolyRectangle,
+    ExaCheckPolyArc,
+    miFillPolygon,
+    exaPolyFillRect,
+    miPolyFillArc,
+    miPolyText8,
+    miPolyText16,
+    miImageText8,
+    miImageText16,
+    ExaCheckImageGlyphBlt,
+    ExaCheckPolyGlyphBlt,
+    ExaCheckPushPixels,
+};
+
+void
+exaCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
+{
+    RegionRec	rgnDst;
+    int		dx, dy;
+    PixmapPtr	pPixmap = (*pWin->drawable.pScreen->GetWindowPixmap) (pWin);
+    ExaScreenPriv(pWin->drawable.pScreen);
+
+    dx = ptOldOrg.x - pWin->drawable.x;
+    dy = ptOldOrg.y - pWin->drawable.y;
+    RegionTranslate(prgnSrc, -dx, -dy);
+
+    RegionInit(&rgnDst, NullBox, 0);
+
+    RegionIntersect(&rgnDst, &pWin->borderClip, prgnSrc);
+#ifdef COMPOSITE
+    if (pPixmap->screen_x || pPixmap->screen_y)
+	RegionTranslate(&rgnDst,
+			  -pPixmap->screen_x, -pPixmap->screen_y);
+#endif
+
+    if (pExaScr->fallback_counter) {
+	pExaScr->fallback_flags |= EXA_FALLBACK_COPYWINDOW;
+	goto fallback;
+    }
+
+    pExaScr->fallback_flags |= EXA_ACCEL_COPYWINDOW;
+    miCopyRegion (&pPixmap->drawable, &pPixmap->drawable,
+		  NULL,
+		  &rgnDst, dx, dy, exaCopyNtoN, 0, NULL);
+    pExaScr->fallback_flags &= ~EXA_ACCEL_COPYWINDOW;
+
+fallback:
+    RegionUninit(&rgnDst);
+
+    if (pExaScr->fallback_flags & EXA_FALLBACK_COPYWINDOW) {
+	pExaScr->fallback_flags &= ~EXA_FALLBACK_COPYWINDOW;
+	RegionTranslate(prgnSrc, dx, dy);
+	ExaCheckCopyWindow(pWin, ptOldOrg, prgnSrc);
+    }
+}
+
+static Bool
+exaFillRegionSolid (DrawablePtr	pDrawable, RegionPtr pRegion, Pixel pixel,
+		    CARD32 planemask, CARD32 alu, unsigned int clientClipType)
+{
+    ExaScreenPriv(pDrawable->pScreen);
+    PixmapPtr pPixmap = exaGetDrawablePixmap (pDrawable);
+    ExaPixmapPriv (pPixmap);
+    int xoff, yoff;
+    Bool ret = FALSE;
+
+    exaGetDrawableDeltas(pDrawable, pPixmap, &xoff, &yoff);
+    RegionTranslate(pRegion, xoff, yoff);
+
+    if (pExaScr->fallback_counter || pExaPixmap->accel_blocked)
+	goto out;
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pPixmap;
+	pixmaps[0].pReg = exaGCReadsDestination(pDrawable, planemask, FillSolid,
+						alu, clientClipType) ? NULL : pRegion;
+
+	exaDoMigration (pixmaps, 1, TRUE);
+    }
+
+    if (exaPixmapHasGpuCopy (pPixmap) &&
+	(*pExaScr->info->PrepareSolid) (pPixmap, alu, planemask, pixel))
+    {
+	int nbox;
+	BoxPtr pBox;
+
+	nbox = RegionNumRects (pRegion);
+	pBox = RegionRects (pRegion);
+
+	while (nbox--)
+	{
+	    (*pExaScr->info->Solid) (pPixmap, pBox->x1, pBox->y1, pBox->x2,
+				     pBox->y2);
+	    pBox++;
+	}
+	(*pExaScr->info->DoneSolid) (pPixmap);
+	exaMarkSync(pDrawable->pScreen);
+
+	if (pExaPixmap->pDamage &&
+	    pExaPixmap->sys_ptr && pDrawable->type == DRAWABLE_PIXMAP &&
+	    pDrawable->width == 1 && pDrawable->height == 1 &&
+	    pDrawable->bitsPerPixel != 24) {
+	    ExaPixmapPriv(pPixmap);
+	    RegionPtr pending_damage = DamagePendingRegion(pExaPixmap->pDamage);
+
+	    switch (pDrawable->bitsPerPixel) {
+	    case 32:
+		*(CARD32*)pExaPixmap->sys_ptr = pixel;
+		break;
+	    case 16:
+		*(CARD16*)pExaPixmap->sys_ptr = pixel;
+		break;
+	    case 8:
+	    case 4:
+	    case 1:
+		*(CARD8*)pExaPixmap->sys_ptr = pixel;
+	    }
+
+	    RegionUnion(&pExaPixmap->validSys, &pExaPixmap->validSys,
+			 pRegion);
+	    RegionUnion(&pExaPixmap->validFB, &pExaPixmap->validFB,
+			 pRegion);
+	    RegionSubtract(pending_damage, pending_damage, pRegion);
+	}
+
+	ret = TRUE;
+    }
+
+out:
+    RegionTranslate(pRegion, -xoff, -yoff);
+
+    return ret;
+}
+
+/* Try to do an accelerated tile of the pTile into pRegion of pDrawable.
+ * Based on fbFillRegionTiled(), fbTile().
+ */
+Bool
+exaFillRegionTiled (DrawablePtr pDrawable, RegionPtr pRegion, PixmapPtr pTile,
+		    DDXPointPtr pPatOrg, CARD32 planemask, CARD32 alu,
+		    unsigned int clientClipType)
+{
+    ExaScreenPriv(pDrawable->pScreen);
+    PixmapPtr pPixmap;
+    ExaPixmapPrivPtr pExaPixmap;
+    ExaPixmapPrivPtr pTileExaPixmap = ExaGetPixmapPriv(pTile);
+    int xoff, yoff;
+    int tileWidth, tileHeight;
+    int nbox = RegionNumRects (pRegion);
+    BoxPtr pBox = RegionRects (pRegion);
+    Bool ret = FALSE;
+    int i;
+
+    tileWidth = pTile->drawable.width;
+    tileHeight = pTile->drawable.height;
+
+    /* If we're filling with a solid color, grab it out and go to
+     * FillRegionSolid, saving numerous copies.
+     */
+    if (tileWidth == 1 && tileHeight == 1)
+	return exaFillRegionSolid(pDrawable, pRegion,
+				  exaGetPixmapFirstPixel (pTile), planemask,
+				  alu, clientClipType);
+
+    pPixmap = exaGetDrawablePixmap (pDrawable);
+    pExaPixmap = ExaGetPixmapPriv (pPixmap);
+
+    if (pExaScr->fallback_counter || pExaPixmap->accel_blocked ||
+	    pTileExaPixmap->accel_blocked)
+	return FALSE;
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[2];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pPixmap;
+	pixmaps[0].pReg = exaGCReadsDestination(pDrawable, planemask, FillTiled,
+						alu, clientClipType) ? NULL : pRegion;
+	pixmaps[1].as_dst = FALSE;
+	pixmaps[1].as_src = TRUE;
+	pixmaps[1].pPix = pTile;
+	pixmaps[1].pReg = NULL;
+
+	exaDoMigration (pixmaps, 2, TRUE);
+    }
+
+    pPixmap = exaGetOffscreenPixmap (pDrawable, &xoff, &yoff);
+
+    if (!pPixmap || !exaPixmapHasGpuCopy(pTile))
+	return FALSE;
+
+    if ((*pExaScr->info->PrepareCopy) (pTile, pPixmap, 1, 1, alu, planemask))
+    {
+	if (xoff || yoff)
+	    RegionTranslate(pRegion, xoff, yoff);
+
+	for (i = 0; i < nbox; i++)
+	{
+	    int height = pBox[i].y2 - pBox[i].y1;
+	    int dstY = pBox[i].y1;
+	    int tileY;
+
+	    if (alu == GXcopy)
+		height = min(height, tileHeight);
+
+	    modulus(dstY - yoff - pDrawable->y - pPatOrg->y, tileHeight, tileY);
+
+	    while (height > 0) {
+		int width = pBox[i].x2 - pBox[i].x1;
+		int dstX = pBox[i].x1;
+		int tileX;
+		int h = tileHeight - tileY;
+
+		if (alu == GXcopy)
+		    width = min(width, tileWidth);
+
+		if (h > height)
+		    h = height;
+		height -= h;
+
+		modulus(dstX - xoff - pDrawable->x - pPatOrg->x, tileWidth,
+			tileX);
+
+		while (width > 0) {
+		    int w = tileWidth - tileX;
+		    if (w > width)
+			w = width;
+		    width -= w;
+
+		    (*pExaScr->info->Copy) (pPixmap, tileX, tileY, dstX, dstY,
+					    w, h);
+		    dstX += w;
+		    tileX = 0;
+		}
+		dstY += h;
+		tileY = 0;
+	    }
+	}
+	(*pExaScr->info->DoneCopy) (pPixmap);
+
+	/* With GXcopy, we only need to do the basic algorithm up to the tile
+	 * size; then, we can just keep doubling the destination in each
+	 * direction until it fills the box. This way, the number of copy
+	 * operations is O(log(rx)) + O(log(ry)) instead of O(rx * ry), where
+	 * rx/ry is the ratio between box and tile width/height. This can make
+	 * a big difference if each driver copy incurs a significant constant
+	 * overhead.
+	 */
+	if (alu != GXcopy)
+	    ret = TRUE;
+	else {
+	    Bool more_copy = FALSE;
+
+	    for (i = 0; i < nbox; i++) {
+		int dstX = pBox[i].x1 + tileWidth;
+		int dstY = pBox[i].y1 + tileHeight;
+
+		if ((dstX < pBox[i].x2) || (dstY < pBox[i].y2)) {
+		    more_copy = TRUE;
+		    break;
+		}
+	    }
+
+	    if (more_copy == FALSE)
+		ret = TRUE;
+
+	    if (more_copy && (*pExaScr->info->PrepareCopy) (pPixmap, pPixmap,
+							    1, 1, alu, planemask)) {
+		for (i = 0; i < nbox; i++)
+		{
+		    int dstX = pBox[i].x1 + tileWidth;
+		    int dstY = pBox[i].y1 + tileHeight;
+		    int width = min(pBox[i].x2 - dstX, tileWidth);
+		    int height = min(pBox[i].y2 - pBox[i].y1, tileHeight);
+
+		    while (dstX < pBox[i].x2) {
+			(*pExaScr->info->Copy) (pPixmap, pBox[i].x1, pBox[i].y1,
+						dstX, pBox[i].y1, width, height);
+			dstX += width;
+			width = min(pBox[i].x2 - dstX, width * 2);
+		    }
+
+		    width = pBox[i].x2 - pBox[i].x1;
+		    height = min(pBox[i].y2 - dstY, tileHeight);
+
+		    while (dstY < pBox[i].y2) {
+			(*pExaScr->info->Copy) (pPixmap, pBox[i].x1, pBox[i].y1,
+						pBox[i].x1, dstY, width, height);
+			dstY += height;
+			height = min(pBox[i].y2 - dstY, height * 2);
+		    }
+		}
+
+		(*pExaScr->info->DoneCopy) (pPixmap);
+
+		ret = TRUE;
+	    }
+	}
+
+	exaMarkSync(pDrawable->pScreen);
+
+	if (xoff || yoff)
+	    RegionTranslate(pRegion, -xoff, -yoff);
+    }
+
+    return ret;
+}
+
+
+/**
+ * Accelerates GetImage for solid ZPixmap downloads from framebuffer memory.
+ *
+ * This is probably the only case we actually care about.  The rest fall through
+ * to migration and fbGetImage, which hopefully will result in migration pushing
+ * the pixmap out of framebuffer.
+ */
+void
+exaGetImage (DrawablePtr pDrawable, int x, int y, int w, int h,
+	     unsigned int format, unsigned long planeMask, char *d)
+{
+    ExaScreenPriv (pDrawable->pScreen);
+    PixmapPtr pPix = exaGetDrawablePixmap (pDrawable);
+    ExaPixmapPriv(pPix);
+    int xoff, yoff;
+    Bool ok;
+
+    if (pExaScr->fallback_counter || pExaScr->swappedOut)
+	goto fallback;
+
+    /* If there's a system copy, we want to save the result there */
+    if (pExaPixmap->pDamage)
+	goto fallback;
+
+    pPix = exaGetOffscreenPixmap (pDrawable, &xoff, &yoff);
+
+    if (pPix == NULL || pExaScr->info->DownloadFromScreen == NULL)
+	goto fallback;
+
+    /* Only cover the ZPixmap, solid copy case. */
+    if (format != ZPixmap || !EXA_PM_IS_SOLID(pDrawable, planeMask))
+	goto fallback;
+
+    /* Only try to handle the 8bpp and up cases, since we don't want to think
+     * about <8bpp.
+     */
+    if (pDrawable->bitsPerPixel < 8)
+	goto fallback;
+
+    ok = pExaScr->info->DownloadFromScreen(pPix, pDrawable->x + x + xoff,
+					   pDrawable->y + y + yoff, w, h, d,
+					   PixmapBytePad(w, pDrawable->depth));
+    if (ok) {
+	exaWaitSync(pDrawable->pScreen);
+	return;
+    }
+
+fallback:
+    ExaCheckGetImage(pDrawable, x, y, w, h, format, planeMask, d);
+}
diff --git a/exa/exa_classic.c b/exa/exa_classic.c
new file mode 100644
index 0000000..169ce3a
--- /dev/null
+++ b/exa/exa_classic.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright © 2009 Maarten Maathuis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+/* This file holds the classic exa specific implementation. */
+
+static _X_INLINE void*
+ExaGetPixmapAddress(PixmapPtr p)
+{
+    ExaPixmapPriv(p);
+
+    if (pExaPixmap->use_gpu_copy && pExaPixmap->fb_ptr)
+	return pExaPixmap->fb_ptr;
+    else
+	return pExaPixmap->sys_ptr;
+}
+
+/**
+ * exaCreatePixmap() creates a new pixmap.
+ *
+ * If width and height are 0, this won't be a full-fledged pixmap and it will
+ * get ModifyPixmapHeader() called on it later.  So, we mark it as pinned, because
+ * ModifyPixmapHeader() would break migration.  These types of pixmaps are used
+ * for scratch pixmaps, or to represent the visible screen.
+ */
+PixmapPtr
+exaCreatePixmap_classic(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint)
+{
+    PixmapPtr pPixmap;
+    ExaPixmapPrivPtr	pExaPixmap;
+    BoxRec box;
+    int bpp;
+    ExaScreenPriv(pScreen);
+
+    if (w > 32767 || h > 32767)
+	return NullPixmap;
+
+    swap(pExaScr, pScreen, CreatePixmap);
+    pPixmap = pScreen->CreatePixmap (pScreen, w, h, depth, usage_hint);
+    swap(pExaScr, pScreen, CreatePixmap);
+
+    if (!pPixmap)
+        return NULL;
+
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+    pExaPixmap->driverPriv = NULL;
+
+    bpp = pPixmap->drawable.bitsPerPixel;
+
+    pExaPixmap->driverPriv = NULL;
+    /* Scratch pixmaps may have w/h equal to zero, and may not be
+     * migrated.
+     */
+    if (!w || !h)
+	pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
+    else
+	pExaPixmap->score = EXA_PIXMAP_SCORE_INIT;
+
+    pExaPixmap->sys_ptr = pPixmap->devPrivate.ptr;
+    pExaPixmap->sys_pitch = pPixmap->devKind;
+
+    pPixmap->devPrivate.ptr = NULL;
+    pExaPixmap->use_gpu_copy = FALSE;
+
+    pExaPixmap->fb_ptr = NULL;
+    exaSetFbPitch(pExaScr, pExaPixmap, w, h, bpp);
+    pExaPixmap->fb_size = pExaPixmap->fb_pitch * h;
+
+    if (pExaPixmap->fb_pitch > 131071) {
+	swap(pExaScr, pScreen, DestroyPixmap);
+	pScreen->DestroyPixmap (pPixmap);
+	swap(pExaScr, pScreen, DestroyPixmap);
+	return NULL;
+    }
+
+    /* Set up damage tracking */
+    pExaPixmap->pDamage = DamageCreate (NULL, NULL,
+					DamageReportNone, TRUE,
+					pScreen, pPixmap);
+
+    if (pExaPixmap->pDamage == NULL) {
+	swap(pExaScr, pScreen, DestroyPixmap);
+	pScreen->DestroyPixmap (pPixmap);
+	swap(pExaScr, pScreen, DestroyPixmap);
+	return NULL;
+    }
+
+    DamageRegister (&pPixmap->drawable, pExaPixmap->pDamage);
+    /* This ensures that pending damage reflects the current operation. */
+    /* This is used by exa to optimize migration. */
+    DamageSetReportAfterOp (pExaPixmap->pDamage, TRUE);
+
+    pExaPixmap->area = NULL;
+
+    /* We set the initial pixmap as completely valid for a simple reason.
+     * Imagine a 1000x1000 pixmap, it has 1 million pixels, 250000 of which
+     * could form single pixel rects as part of a region. Setting the complete region
+     * as valid is a natural defragmentation of the region.
+     */
+    box.x1 = 0;
+    box.y1 = 0;
+    box.x2 = w;
+    box.y2 = h;
+    RegionInit(&pExaPixmap->validSys, &box, 0);
+    RegionInit(&pExaPixmap->validFB, &box, 0);
+
+    exaSetAccelBlock(pExaScr, pExaPixmap,
+                     w, h, bpp);
+
+    /* During a fallback we must prepare access. */
+    if (pExaScr->fallback_counter)
+	exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_AUX_DEST);
+
+    return pPixmap;
+}
+
+Bool
+exaModifyPixmapHeader_classic(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData)
+{
+    ScreenPtr pScreen;
+    ExaScreenPrivPtr pExaScr;
+    ExaPixmapPrivPtr pExaPixmap;
+    Bool ret;
+
+    if (!pPixmap)
+        return FALSE;
+
+    pScreen = pPixmap->drawable.pScreen;
+    pExaScr = ExaGetScreenPriv(pScreen);
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+
+    if (pExaPixmap) {
+        if (pPixData)
+            pExaPixmap->sys_ptr = pPixData;
+
+        if (devKind > 0)
+            pExaPixmap->sys_pitch = devKind;
+
+	/* Classic EXA:
+	 * - Framebuffer.
+	 * - Scratch pixmap with gpu memory.
+	 */
+	if (pExaScr->info->memoryBase && pPixData) {
+	    if ((CARD8 *)pPixData >= pExaScr->info->memoryBase &&
+		((CARD8 *)pPixData - pExaScr->info->memoryBase) <
+				pExaScr->info->memorySize) {
+		pExaPixmap->fb_ptr = pPixData;
+		pExaPixmap->fb_pitch = devKind;
+		pExaPixmap->use_gpu_copy = TRUE;
+	    }
+	}
+
+        if (width > 0 && height > 0 && bitsPerPixel > 0) {
+            exaSetFbPitch(pExaScr, pExaPixmap,
+                          width, height, bitsPerPixel);
+
+            exaSetAccelBlock(pExaScr, pExaPixmap,
+                             width, height, bitsPerPixel);
+        }
+
+	/* Pixmaps subject to ModifyPixmapHeader will be pinned to system or
+	 * gpu memory, so there's no need to track damage.
+	 */
+	if (pExaPixmap->pDamage) {
+	    DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    DamageDestroy(pExaPixmap->pDamage);
+	    pExaPixmap->pDamage = NULL;
+	}
+    }
+
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+    ret = pScreen->ModifyPixmapHeader(pPixmap, width, height, depth,
+					    bitsPerPixel, devKind, pPixData);
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+
+    /* Always NULL this, we don't want lingering pointers. */
+    pPixmap->devPrivate.ptr = NULL;
+
+    return ret;
+}
+
+Bool
+exaDestroyPixmap_classic (PixmapPtr pPixmap)
+{
+    ScreenPtr	pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    Bool ret;
+
+    if (pPixmap->refcnt == 1)
+    {
+	ExaPixmapPriv (pPixmap);
+
+	exaDestroyPixmap(pPixmap);
+
+	if (pExaPixmap->area)
+	{
+	    DBG_PIXMAP(("-- 0x%p (0x%x) (%dx%d)\n",
+                        (void*)pPixmap->drawable.id,
+			 ExaGetPixmapPriv(pPixmap)->area->offset,
+			 pPixmap->drawable.width,
+			 pPixmap->drawable.height));
+	    /* Free the offscreen area */
+	    exaOffscreenFree (pPixmap->drawable.pScreen, pExaPixmap->area);
+	    pPixmap->devPrivate.ptr = pExaPixmap->sys_ptr;
+	    pPixmap->devKind = pExaPixmap->sys_pitch;
+	}
+	RegionUninit(&pExaPixmap->validSys);
+	RegionUninit(&pExaPixmap->validFB);
+    }
+
+    swap(pExaScr, pScreen, DestroyPixmap);
+    ret = pScreen->DestroyPixmap (pPixmap);
+    swap(pExaScr, pScreen, DestroyPixmap);
+
+    return ret;
+}
+
+Bool
+exaPixmapHasGpuCopy_classic(PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    ExaPixmapPriv(pPixmap);
+    Bool ret;
+
+    if (pExaScr->info->PixmapIsOffscreen) {
+	void* old_ptr = pPixmap->devPrivate.ptr;
+	pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
+	ret = pExaScr->info->PixmapIsOffscreen(pPixmap);
+	pPixmap->devPrivate.ptr = old_ptr;
+    } else
+	ret = (pExaPixmap->use_gpu_copy && pExaPixmap->fb_ptr);
+
+    return ret;
+}
diff --git a/exa/exa_driver.c b/exa/exa_driver.c
new file mode 100644
index 0000000..b9903d1
--- /dev/null
+++ b/exa/exa_driver.c
@@ -0,0 +1,226 @@
+/*
+ * Copyright © 2009 Maarten Maathuis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+/* This file holds the driver allocated pixmaps specific implementation. */
+
+static _X_INLINE void*
+ExaGetPixmapAddress(PixmapPtr p)
+{
+    ExaPixmapPriv(p);
+
+    return pExaPixmap->sys_ptr;
+}
+
+/**
+ * exaCreatePixmap() creates a new pixmap.
+ *
+ * Pixmaps are always marked as pinned, because exa has no control over them.
+ */
+PixmapPtr
+exaCreatePixmap_driver(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint)
+{
+    PixmapPtr pPixmap;
+    ExaPixmapPrivPtr	pExaPixmap;
+    int bpp;
+    size_t paddedWidth, datasize;
+    ExaScreenPriv(pScreen);
+
+    if (w > 32767 || h > 32767)
+	return NullPixmap;
+
+    swap(pExaScr, pScreen, CreatePixmap);
+    pPixmap = pScreen->CreatePixmap(pScreen, 0, 0, depth, usage_hint);
+    swap(pExaScr, pScreen, CreatePixmap);
+
+    if (!pPixmap)
+        return NULL;
+
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+    pExaPixmap->driverPriv = NULL;
+
+    bpp = pPixmap->drawable.bitsPerPixel;
+
+    /* Set this before driver hooks, to allow for driver pixmaps without gpu
+     * memory to back it. These pixmaps have a valid pointer at all times.
+     */
+    pPixmap->devPrivate.ptr = NULL;
+
+    if (pExaScr->info->CreatePixmap2) {
+	int new_pitch = 0;
+	pExaPixmap->driverPriv = pExaScr->info->CreatePixmap2(pScreen, w, h, depth, usage_hint, bpp, &new_pitch);
+	paddedWidth = pExaPixmap->fb_pitch = new_pitch;
+    }
+    else {
+	paddedWidth = ((w * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
+	if (paddedWidth / 4 > 32767 || h > 32767)
+	    return NullPixmap;
+
+	exaSetFbPitch(pExaScr, pExaPixmap, w, h, bpp);
+
+	if (paddedWidth < pExaPixmap->fb_pitch)
+	    paddedWidth = pExaPixmap->fb_pitch;
+	datasize = h * paddedWidth;
+	pExaPixmap->driverPriv = pExaScr->info->CreatePixmap(pScreen, datasize, 0);
+    }
+
+    if (!pExaPixmap->driverPriv) {
+	swap(pExaScr, pScreen, DestroyPixmap);
+	pScreen->DestroyPixmap (pPixmap);
+	swap(pExaScr, pScreen, DestroyPixmap);
+	return NULL;
+    }
+
+    /* Allow ModifyPixmapHeader to set sys_ptr appropriately. */
+    pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
+    pExaPixmap->fb_ptr = NULL;
+    pExaPixmap->pDamage = NULL;
+    pExaPixmap->sys_ptr = NULL;
+
+    (*pScreen->ModifyPixmapHeader)(pPixmap, w, h, 0, 0,
+				    paddedWidth, NULL);
+
+    pExaPixmap->area = NULL;
+
+    exaSetAccelBlock(pExaScr, pExaPixmap,
+                     w, h, bpp);
+
+    pExaPixmap->use_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+
+    /* During a fallback we must prepare access. */
+    if (pExaScr->fallback_counter)
+	exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_AUX_DEST);
+
+    return pPixmap;
+}
+
+Bool
+exaModifyPixmapHeader_driver(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData)
+{
+    ScreenPtr pScreen;
+    ExaScreenPrivPtr pExaScr;
+    ExaPixmapPrivPtr pExaPixmap;
+    Bool ret;
+
+    if (!pPixmap)
+        return FALSE;
+
+    pScreen = pPixmap->drawable.pScreen;
+    pExaScr = ExaGetScreenPriv(pScreen);
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+
+    if (pExaPixmap) {
+        if (pPixData)
+            pExaPixmap->sys_ptr = pPixData;
+
+        if (devKind > 0)
+            pExaPixmap->sys_pitch = devKind;
+
+        if (width > 0 && height > 0 && bitsPerPixel > 0) {
+            exaSetFbPitch(pExaScr, pExaPixmap,
+                          width, height, bitsPerPixel);
+
+            exaSetAccelBlock(pExaScr, pExaPixmap,
+                             width, height, bitsPerPixel);
+        }
+    }
+
+    if (pExaScr->info->ModifyPixmapHeader) {
+	ret = pExaScr->info->ModifyPixmapHeader(pPixmap, width, height, depth,
+						bitsPerPixel, devKind, pPixData);
+	/* For EXA_HANDLES_PIXMAPS, we set pPixData to NULL.
+	 * If pPixmap->devPrivate.ptr is non-NULL, then we've got a
+	 * !has_gpu_copy pixmap. We need to store the pointer,
+	 * because PrepareAccess won't be called.
+	 */
+	if (!pPixData && pPixmap->devPrivate.ptr && pPixmap->devKind) {
+	    pExaPixmap->sys_ptr = pPixmap->devPrivate.ptr;
+	    pExaPixmap->sys_pitch = pPixmap->devKind;
+	}
+	if (ret == TRUE)
+	    goto out;
+    }
+
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+    ret = pScreen->ModifyPixmapHeader(pPixmap, width, height, depth,
+					    bitsPerPixel, devKind, pPixData);
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+
+out:
+    /* Always NULL this, we don't want lingering pointers. */
+    pPixmap->devPrivate.ptr = NULL;
+
+    return ret;
+}
+
+Bool
+exaDestroyPixmap_driver (PixmapPtr pPixmap)
+{
+    ScreenPtr	pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    Bool ret;
+
+    if (pPixmap->refcnt == 1)
+    {
+	ExaPixmapPriv (pPixmap);
+
+	exaDestroyPixmap(pPixmap);
+
+	if (pExaPixmap->driverPriv)
+	    pExaScr->info->DestroyPixmap(pScreen, pExaPixmap->driverPriv);
+	pExaPixmap->driverPriv = NULL;
+    }
+
+    swap(pExaScr, pScreen, DestroyPixmap);
+    ret = pScreen->DestroyPixmap (pPixmap);
+    swap(pExaScr, pScreen, DestroyPixmap);
+
+    return ret;
+}
+
+Bool
+exaPixmapHasGpuCopy_driver(PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    pointer saved_ptr;
+    Bool ret;
+
+    saved_ptr = pPixmap->devPrivate.ptr;
+    pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
+    ret = pExaScr->info->PixmapIsOffscreen(pPixmap);
+    pPixmap->devPrivate.ptr = saved_ptr;
+
+    return ret;
+}
diff --git a/exa/exa_glyphs.c b/exa/exa_glyphs.c
new file mode 100644
index 0000000..5c46ec9
--- /dev/null
+++ b/exa/exa_glyphs.c
@@ -0,0 +1,863 @@
+/*
+ * Copyright © 2008 Red Hat, Inc.
+ * Partly based on code Copyright © 2000 SuSE, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Red Hat not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  Red Hat makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * Red Hat DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL Red Hat
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of SuSE not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  SuSE makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Owen Taylor <otaylor@fishsoup.net>
+ * Based on code by: Keith Packard
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "exa_priv.h"
+
+#include "mipict.h"
+
+#if DEBUG_GLYPH_CACHE
+#define DBG_GLYPH_CACHE(a) ErrorF a
+#else
+#define DBG_GLYPH_CACHE(a)
+#endif
+
+/* Width of the pixmaps we use for the caches; this should be less than
+ * max texture size of the driver; this may need to actually come from
+ * the driver.
+ */
+#define CACHE_PICTURE_WIDTH 1024
+
+/* Maximum number of glyphs we buffer on the stack before flushing
+ * rendering to the mask or destination surface.
+ */
+#define GLYPH_BUFFER_SIZE 256
+
+typedef struct {
+    PicturePtr mask;
+    ExaCompositeRectRec rects[GLYPH_BUFFER_SIZE];
+    int count;
+} ExaGlyphBuffer, *ExaGlyphBufferPtr;
+
+typedef enum {
+    ExaGlyphSuccess,    /* Glyph added to render buffer */
+    ExaGlyphFail,       /* out of memory, etc */
+    ExaGlyphNeedFlush,  /* would evict a glyph already in the buffer */
+} ExaGlyphCacheResult;
+
+void
+exaGlyphsInit(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    int i = 0;
+
+    memset(pExaScr->glyphCaches, 0, sizeof(pExaScr->glyphCaches));
+
+    pExaScr->glyphCaches[i].format = PICT_a8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 16;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 32;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 16;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 32;
+    i++;
+
+    assert(i == EXA_NUM_GLYPH_CACHES);
+    
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	pExaScr->glyphCaches[i].columns = CACHE_PICTURE_WIDTH / pExaScr->glyphCaches[i].glyphWidth;
+	pExaScr->glyphCaches[i].size = 256;
+	pExaScr->glyphCaches[i].hashSize = 557;
+    }
+}
+
+static void
+exaUnrealizeGlyphCaches(ScreenPtr    pScreen,
+			unsigned int format)
+{
+    ExaScreenPriv(pScreen);
+    int i;
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+	
+	if (cache->format != format)
+	    continue;
+
+	if (cache->picture) {
+	    FreePicture ((pointer) cache->picture, (XID) 0);
+	    cache->picture = NULL;
+	}
+
+	free(cache->hashEntries);
+	cache->hashEntries = NULL;
+	
+	free(cache->glyphs);
+	cache->glyphs = NULL;
+	cache->glyphCount = 0;
+    }
+}
+
+#define NeedsComponent(f) (PICT_FORMAT_A(f) != 0 && PICT_FORMAT_RGB(f) != 0)
+
+/* All caches for a single format share a single pixmap for glyph storage,
+ * allowing mixing glyphs of different sizes without paying a penalty
+ * for switching between mask pixmaps. (Note that for a size of font
+ * right at the border between two sizes, we might be switching for almost
+ * every glyph.)
+ *
+ * This function allocates the storage pixmap, and then fills in the
+ * rest of the allocated structures for all caches with the given format.
+ */
+static Bool
+exaRealizeGlyphCaches(ScreenPtr    pScreen,
+		      unsigned int format)
+{
+    ExaScreenPriv(pScreen);
+
+    int depth = PIXMAN_FORMAT_DEPTH(format);
+    PictFormatPtr pPictFormat;
+    PixmapPtr pPixmap;
+    PicturePtr pPicture;
+    CARD32 component_alpha;
+    int height;
+    int i;
+    int	error;
+
+    pPictFormat = PictureMatchFormat(pScreen, depth, format);
+    if (!pPictFormat)
+	return FALSE;
+    
+    /* Compute the total vertical size needed for the format */
+
+    height = 0;
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+	int rows;
+
+	if (cache->format != format)
+	    continue;
+
+	cache->yOffset = height;
+
+	rows = (cache->size + cache->columns - 1) / cache->columns;
+	height += rows * cache->glyphHeight;
+    }
+
+    /* Now allocate the pixmap and picture */
+    pPixmap = (*pScreen->CreatePixmap) (pScreen,
+					CACHE_PICTURE_WIDTH,
+					height, depth, 0);
+    if (!pPixmap)
+	return FALSE;
+
+    component_alpha = NeedsComponent(pPictFormat->format);
+    pPicture = CreatePicture(0, &pPixmap->drawable, pPictFormat,
+			     CPComponentAlpha, &component_alpha, serverClient,
+			     &error);
+
+    (*pScreen->DestroyPixmap) (pPixmap); /* picture holds a refcount */
+
+    if (!pPicture)
+	return FALSE;
+
+    /* And store the picture in all the caches for the format */
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+	int j;
+
+	if (cache->format != format)
+	    continue;
+
+	cache->picture = pPicture;
+	cache->picture->refcnt++;
+	cache->hashEntries = malloc(sizeof(int) * cache->hashSize);
+	cache->glyphs = malloc(sizeof(ExaCachedGlyphRec) * cache->size);
+	cache->glyphCount = 0;
+
+	if (!cache->hashEntries || !cache->glyphs)
+	    goto bail;
+
+	for (j = 0; j < cache->hashSize; j++)
+	    cache->hashEntries[j] = -1;
+	
+	cache->evictionPosition = rand() % cache->size;
+    }
+
+    /* Each cache references the picture individually */
+    FreePicture ((pointer) pPicture, (XID) 0);
+    return TRUE;
+
+bail:
+    exaUnrealizeGlyphCaches(pScreen, format);
+    return FALSE;
+}
+
+void
+exaGlyphsFini (ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    int i;
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+
+	if (cache->picture)
+	    exaUnrealizeGlyphCaches(pScreen, cache->format);
+    }
+}
+
+static int
+exaGlyphCacheHashLookup(ExaGlyphCachePtr cache,
+			GlyphPtr         pGlyph)
+{
+    int slot;
+
+    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;
+    
+    while (TRUE) { /* hash table can never be full */
+	int entryPos = cache->hashEntries[slot];
+	if (entryPos == -1)
+	    return -1;
+
+	if (memcmp(pGlyph->sha1, cache->glyphs[entryPos].sha1, sizeof(pGlyph->sha1)) == 0){
+	    return entryPos;
+	}
+	    
+	slot--;
+	if (slot < 0)
+	    slot = cache->hashSize - 1;
+    }
+}
+
+static void
+exaGlyphCacheHashInsert(ExaGlyphCachePtr cache,
+			GlyphPtr         pGlyph,
+			int              pos)
+{
+    int slot;
+
+    memcpy(cache->glyphs[pos].sha1, pGlyph->sha1, sizeof(pGlyph->sha1));
+    
+    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;
+    
+    while (TRUE) { /* hash table can never be full */
+	if (cache->hashEntries[slot] == -1) {
+	    cache->hashEntries[slot] = pos;
+	    return;
+	}
+	    
+	slot--;
+	if (slot < 0)
+	    slot = cache->hashSize - 1;
+    }
+}
+
+static void
+exaGlyphCacheHashRemove(ExaGlyphCachePtr cache,
+			int              pos)
+{
+    int slot;
+    int emptiedSlot = -1;
+
+    slot = (*(CARD32 *) cache->glyphs[pos].sha1) % cache->hashSize;
+
+    while (TRUE) { /* hash table can never be full */
+	int entryPos = cache->hashEntries[slot];
+	
+	if (entryPos == -1)
+	    return;
+
+	if (entryPos == pos) {
+	    cache->hashEntries[slot] = -1;
+	    emptiedSlot = slot;
+	} else if (emptiedSlot != -1) {
+	    /* See if we can move this entry into the emptied slot, we can't
+	     * do that if if entry would have hashed between the current position
+	     * and the emptied slot. (taking wrapping into account). Bad positions
+	     * are:
+	     *
+	     * |   XXXXXXXXXX             |
+	     *     i         j            
+	     *                            
+	     * |XXX                   XXXX|
+	     *     j                  i
+	     *
+	     * i - slot, j - emptiedSlot
+	     *
+	     * (Knuth 6.4R)
+	     */
+	    
+	    int entrySlot = (*(CARD32 *) cache->glyphs[entryPos].sha1) % cache->hashSize;
+
+	    if (!((entrySlot >= slot && entrySlot < emptiedSlot) ||
+		  (emptiedSlot < slot && (entrySlot < emptiedSlot || entrySlot >= slot)))) 
+	    {
+		cache->hashEntries[emptiedSlot] = entryPos;
+		cache->hashEntries[slot] = -1;
+		emptiedSlot = slot;
+	    }
+	}
+	
+	slot--;
+	if (slot < 0)
+	    slot = cache->hashSize - 1;
+    }
+}
+
+#define CACHE_X(pos) (((pos) % cache->columns) * cache->glyphWidth)
+#define CACHE_Y(pos) (cache->yOffset + ((pos) / cache->columns) * cache->glyphHeight)
+
+/* The most efficient thing to way to upload the glyph to the screen
+ * is to use the UploadToScreen() driver hook; this allows us to
+ * pipeline glyph uploads and to avoid creating gpu backed pixmaps for
+ * glyphs that we'll never use again.
+ *
+ * If we can't do it with UploadToScreen (because the glyph has a gpu copy,
+ * etc), we fall back to CompositePicture.
+ *
+ * We need to damage the cache pixmap manually in either case because the damage
+ * layer unwrapped the picture screen before calling exaGlyphs.
+ */
+static void
+exaGlyphCacheUploadGlyph(ScreenPtr         pScreen,
+			 ExaGlyphCachePtr  cache,
+			 int               x,
+			 int               y,
+			 GlyphPtr          pGlyph)
+{
+    ExaScreenPriv(pScreen);
+    PicturePtr pGlyphPicture = GlyphPicture(pGlyph)[pScreen->myNum];
+    PixmapPtr pGlyphPixmap = (PixmapPtr)pGlyphPicture->pDrawable;
+    ExaPixmapPriv(pGlyphPixmap);
+    PixmapPtr pCachePixmap = (PixmapPtr)cache->picture->pDrawable;
+
+    if (!pExaScr->info->UploadToScreen || pExaScr->swappedOut || pExaPixmap->accel_blocked)
+	goto composite;
+
+    /* If the glyph pixmap is already uploaded, no point in doing
+     * things this way */
+    if (exaPixmapHasGpuCopy(pGlyphPixmap))
+	goto composite;
+
+    /* UploadToScreen only works if bpp match */
+    if (pGlyphPixmap->drawable.bitsPerPixel != pCachePixmap->drawable.bitsPerPixel)
+	goto composite;
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	/* cache pixmap must have a gpu copy. */
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pCachePixmap;
+	pixmaps[0].pReg = NULL;
+	exaDoMigration (pixmaps, 1, TRUE);
+    }
+
+    if (!exaPixmapHasGpuCopy(pCachePixmap))
+	goto composite;
+
+    /* x,y are in pixmap coordinates, no need for cache{X,Y}off */
+    if (pExaScr->info->UploadToScreen(pCachePixmap,
+				      x,
+				      y,
+				      pGlyph->info.width,
+				      pGlyph->info.height,
+				      (char *)pExaPixmap->sys_ptr,
+				      pExaPixmap->sys_pitch))
+	goto damage;
+
+composite:
+    CompositePicture (PictOpSrc,
+		      pGlyphPicture,
+		      None,
+		      cache->picture,
+		      0, 0,
+		      0, 0,
+		      x,
+		      y,
+		      pGlyph->info.width,
+		      pGlyph->info.height);
+
+damage:
+    /* The cache pixmap isn't a window, so no need to offset coordinates. */
+    exaPixmapDirty (pCachePixmap,
+		    x,
+		    y,
+		    x + cache->glyphWidth,
+		    y + cache->glyphHeight);
+}
+
+static ExaGlyphCacheResult
+exaGlyphCacheBufferGlyph(ScreenPtr         pScreen,
+			 ExaGlyphCachePtr  cache,
+			 ExaGlyphBufferPtr buffer,
+			 GlyphPtr          pGlyph,
+			 PicturePtr        pSrc,
+			 PicturePtr        pDst,
+			 INT16             xSrc,
+			 INT16             ySrc,
+			 INT16             xMask,
+			 INT16             yMask,
+			 INT16             xDst,
+			 INT16             yDst)
+{
+    ExaCompositeRectPtr rect;
+    int pos;
+    int x, y;
+    
+    if (buffer->mask && buffer->mask != cache->picture)
+	return ExaGlyphNeedFlush;
+
+    if (!cache->picture) {
+	if (!exaRealizeGlyphCaches(pScreen, cache->format))
+	    return ExaGlyphFail;
+    }
+
+    DBG_GLYPH_CACHE(("(%d,%d,%s): buffering glyph %lx\n",
+		     cache->glyphWidth, cache->glyphHeight, cache->format == PICT_a8 ? "A" : "ARGB",
+		     (long)*(CARD32 *) pGlyph->sha1));
+   
+    pos = exaGlyphCacheHashLookup(cache, pGlyph);
+    if (pos != -1) {
+	DBG_GLYPH_CACHE(("  found existing glyph at %d\n", pos));
+	x = CACHE_X(pos);
+	y = CACHE_Y(pos);
+    } else {
+	if (cache->glyphCount < cache->size) {
+	    /* Space remaining; we fill from the start */
+	    pos = cache->glyphCount;
+	    x = CACHE_X(pos);
+	    y = CACHE_Y(pos);
+	    cache->glyphCount++;
+	    DBG_GLYPH_CACHE(("  storing glyph in free space at %d\n", pos));
+
+	    exaGlyphCacheHashInsert(cache, pGlyph, pos);
+
+	} else {
+	    /* Need to evict an entry. We have to see if any glyphs
+	     * already in the output buffer were at this position in
+	     * the cache
+	     */
+	    pos = cache->evictionPosition;
+	    x = CACHE_X(pos);
+	    y = CACHE_Y(pos);
+	    DBG_GLYPH_CACHE(("  evicting glyph at %d\n", pos));
+	    if (buffer->count) {
+		int i;
+
+		for (i = 0; i < buffer->count; i++) {
+		    if (pSrc ?
+			(buffer->rects[i].xMask == x && buffer->rects[i].yMask == y) :
+			(buffer->rects[i].xSrc == x && buffer->rects[i].ySrc == y)) {
+			DBG_GLYPH_CACHE(("  must flush buffer\n"));
+			return ExaGlyphNeedFlush;
+		    }
+		}
+	    }
+
+	    /* OK, we're all set, swap in the new glyph */
+	    exaGlyphCacheHashRemove(cache, pos);
+	    exaGlyphCacheHashInsert(cache, pGlyph, pos);
+
+	    /* And pick a new eviction position */
+	    cache->evictionPosition = rand() % cache->size;
+	}
+
+	exaGlyphCacheUploadGlyph(pScreen, cache, x, y, pGlyph);
+    }
+
+    buffer->mask = cache->picture;
+	    
+    rect = &buffer->rects[buffer->count];
+
+    if (pSrc)
+    {
+	rect->xSrc = xSrc;
+	rect->ySrc = ySrc;
+	rect->xMask = x;
+	rect->yMask = y;
+    }
+    else
+    {
+	rect->xSrc = x;
+	rect->ySrc = y;
+	rect->xMask = 0;
+	rect->yMask = 0;
+    }
+
+    rect->pDst = pDst;
+    rect->xDst = xDst;
+    rect->yDst = yDst;
+    rect->width = pGlyph->info.width;
+    rect->height = pGlyph->info.height;
+
+    buffer->count++;
+
+    return ExaGlyphSuccess;
+}
+
+#undef CACHE_X
+#undef CACHE_Y
+
+static ExaGlyphCacheResult
+exaBufferGlyph(ScreenPtr         pScreen,
+	       ExaGlyphBufferPtr buffer,
+	       GlyphPtr          pGlyph,
+	       PicturePtr        pSrc,
+	       PicturePtr        pDst,
+	       INT16             xSrc,
+	       INT16             ySrc,
+	       INT16             xMask,
+	       INT16             yMask,
+	       INT16             xDst,
+	       INT16             yDst)
+{
+    ExaScreenPriv(pScreen);
+    unsigned int format = (GlyphPicture(pGlyph)[pScreen->myNum])->format;
+    int width = pGlyph->info.width;
+    int height = pGlyph->info.height;
+    ExaCompositeRectPtr rect;
+    PicturePtr mask;
+    int i;
+
+    if (buffer->count == GLYPH_BUFFER_SIZE)
+	return ExaGlyphNeedFlush;
+
+    if (PICT_FORMAT_BPP(format) == 1)
+	format = PICT_a8;
+    
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+
+	if (format == cache->format &&
+	    width <= cache->glyphWidth &&
+	    height <= cache->glyphHeight) {
+	    ExaGlyphCacheResult result = exaGlyphCacheBufferGlyph(pScreen,
+								  &pExaScr->glyphCaches[i],
+								  buffer,
+								  pGlyph,
+								  pSrc,
+								  pDst,
+								  xSrc, ySrc,
+								  xMask, yMask,
+								  xDst, yDst);
+	    switch (result) {
+	    case ExaGlyphFail:
+		break;
+	    case ExaGlyphSuccess:
+	    case ExaGlyphNeedFlush:
+		return result;
+	    }
+	}
+    }
+
+    /* Couldn't find the glyph in the cache, use the glyph picture directly */
+
+    mask = GlyphPicture(pGlyph)[pScreen->myNum];
+    if (buffer->mask && buffer->mask != mask)
+	return ExaGlyphNeedFlush;
+
+    buffer->mask = mask;
+
+    rect = &buffer->rects[buffer->count];
+    rect->xSrc = xSrc;
+    rect->ySrc = ySrc;
+    rect->xMask = xMask;
+    rect->yMask = yMask;
+    rect->xDst = xDst;
+    rect->yDst = yDst;
+    rect->width = width;
+    rect->height = height;
+
+    buffer->count++;
+
+    return ExaGlyphSuccess;
+}
+
+static void
+exaGlyphsToMask(PicturePtr        pMask,
+		ExaGlyphBufferPtr buffer)
+{
+    exaCompositeRects(PictOpAdd, buffer->mask, NULL, pMask,
+		      buffer->count, buffer->rects);
+    
+    buffer->count = 0;
+    buffer->mask = NULL;
+}
+
+static void
+exaGlyphsToDst(PicturePtr	 pSrc,
+	       PicturePtr	 pDst,
+	       ExaGlyphBufferPtr buffer)
+{
+    exaCompositeRects(PictOpOver, pSrc, buffer->mask, pDst, buffer->count,
+		      buffer->rects);
+    
+    buffer->count = 0;
+    buffer->mask = NULL;
+}
+
+/* Cut and paste from render/glyph.c - probably should export it instead */
+static void
+GlyphExtents (int		nlist,
+	      GlyphListPtr	list,
+	      GlyphPtr	       *glyphs,
+	      BoxPtr		extents)
+{
+    int		x1, x2, y1, y2;
+    int		n;
+    GlyphPtr	glyph;
+    int		x, y;
+    
+    x = 0;
+    y = 0;
+    extents->x1 = MAXSHORT;
+    extents->x2 = MINSHORT;
+    extents->y1 = MAXSHORT;
+    extents->y2 = MINSHORT;
+    while (nlist--)
+    {
+	x += list->xOff;
+	y += list->yOff;
+	n = list->len;
+	list++;
+	while (n--)
+	{
+	    glyph = *glyphs++;
+	    x1 = x - glyph->info.x;
+	    if (x1 < MINSHORT)
+		x1 = MINSHORT;
+	    y1 = y - glyph->info.y;
+	    if (y1 < MINSHORT)
+		y1 = MINSHORT;
+	    x2 = x1 + glyph->info.width;
+	    if (x2 > MAXSHORT)
+		x2 = MAXSHORT;
+	    y2 = y1 + glyph->info.height;
+	    if (y2 > MAXSHORT)
+		y2 = MAXSHORT;
+	    if (x1 < extents->x1)
+		extents->x1 = x1;
+	    if (x2 > extents->x2)
+		extents->x2 = x2;
+	    if (y1 < extents->y1)
+		extents->y1 = y1;
+	    if (y2 > extents->y2)
+		extents->y2 = y2;
+	    x += glyph->info.xOff;
+	    y += glyph->info.yOff;
+	}
+    }
+}
+
+void
+exaGlyphs (CARD8 	 op,
+	   PicturePtr	 pSrc,
+	   PicturePtr	 pDst,
+	   PictFormatPtr maskFormat,
+	   INT16	 xSrc,
+	   INT16	 ySrc,
+	   int		 nlist,
+	   GlyphListPtr	 list,
+	   GlyphPtr	*glyphs)
+{
+    PixmapPtr   pMaskPixmap = 0;
+    PicturePtr  pMask = NULL;
+    ScreenPtr   pScreen = pDst->pDrawable->pScreen;
+    int		width = 0, height = 0;
+    int		x, y;
+    int		first_xOff = list->xOff, first_yOff = list->yOff;
+    int		n;
+    GlyphPtr	glyph;
+    int		error;
+    BoxRec	extents = {0, 0, 0, 0};
+    CARD32	component_alpha;
+    ExaGlyphBuffer buffer;
+
+    if (maskFormat)
+    {
+	ExaScreenPriv(pScreen);
+	GCPtr	    pGC;
+	xRectangle  rect;
+
+	GlyphExtents (nlist, list, glyphs, &extents);
+
+	if (extents.x2 <= extents.x1 || extents.y2 <= extents.y1)
+	    return;
+	width = extents.x2 - extents.x1;
+	height = extents.y2 - extents.y1;
+
+	if (maskFormat->depth == 1) {
+	    PictFormatPtr a8Format = PictureMatchFormat (pScreen, 8, PICT_a8);
+
+	    if (a8Format)
+		maskFormat = a8Format;
+	}
+
+	pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+						maskFormat->depth,
+						CREATE_PIXMAP_USAGE_SCRATCH);
+	if (!pMaskPixmap)
+	    return;
+	component_alpha = NeedsComponent(maskFormat->format);
+	pMask = CreatePicture (0, &pMaskPixmap->drawable,
+			       maskFormat, CPComponentAlpha, &component_alpha,
+			       serverClient, &error);
+	if (!pMask ||
+	    (!component_alpha && pExaScr->info->CheckComposite &&
+	     !(*pExaScr->info->CheckComposite) (PictOpAdd, pSrc, NULL, pMask)))
+	{
+	    PictFormatPtr argbFormat;
+
+	    (*pScreen->DestroyPixmap) (pMaskPixmap);
+
+	    if (!pMask)
+		return;
+
+	    /* The driver can't seem to composite to a8, let's try argb (but
+	     * without component-alpha) */
+	    FreePicture ((pointer) pMask, (XID) 0);
+
+	    argbFormat = PictureMatchFormat (pScreen, 32, PICT_a8r8g8b8);
+
+	    if (argbFormat)
+		maskFormat = argbFormat;
+	    
+	    pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+						    maskFormat->depth,
+						    CREATE_PIXMAP_USAGE_SCRATCH);
+	    if (!pMaskPixmap)
+		return;
+
+	    pMask = CreatePicture (0, &pMaskPixmap->drawable, maskFormat, 0, 0,
+				   serverClient, &error);
+	    if (!pMask) {
+		(*pScreen->DestroyPixmap) (pMaskPixmap);
+		return;
+	    }
+	}
+	pGC = GetScratchGC (pMaskPixmap->drawable.depth, pScreen);
+	ValidateGC (&pMaskPixmap->drawable, pGC);
+	rect.x = 0;
+	rect.y = 0;
+	rect.width = width;
+	rect.height = height;
+	(*pGC->ops->PolyFillRect) (&pMaskPixmap->drawable, pGC, 1, &rect);
+	FreeScratchGC (pGC);
+	x = -extents.x1;
+	y = -extents.y1;
+    }
+    else
+    {
+	x = 0;
+	y = 0;
+    }
+    buffer.count = 0;
+    buffer.mask = NULL;
+    while (nlist--)
+    {
+	x += list->xOff;
+	y += list->yOff;
+	n = list->len;
+	while (n--)
+	{
+	    glyph = *glyphs++;
+
+	    if (glyph->info.width > 0 && glyph->info.height > 0)
+	    {
+		/* pGlyph->info.{x,y} compensate for empty space in the glyph. */
+		if (maskFormat)
+		{
+		    if (exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,
+				       0, 0, 0, 0, x - glyph->info.x, y - glyph->info.y) == ExaGlyphNeedFlush)
+		    {
+			exaGlyphsToMask(pMask, &buffer);
+			exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,
+				       0, 0, 0, 0, x - glyph->info.x, y - glyph->info.y);
+		    }
+		}
+		else
+		{
+		    if (exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,
+				       xSrc + (x - glyph->info.x) - first_xOff, ySrc + (y - glyph->info.y) - first_yOff,
+				       0, 0, x - glyph->info.x, y - glyph->info.y)
+			== ExaGlyphNeedFlush)
+		    {
+			exaGlyphsToDst(pSrc, pDst, &buffer);
+			exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,
+				       xSrc + (x - glyph->info.x) - first_xOff, ySrc + (y - glyph->info.y) - first_yOff,
+				       0, 0, x - glyph->info.x, y - glyph->info.y);
+		    }
+		}
+	    }
+
+	    x += glyph->info.xOff;
+	    y += glyph->info.yOff;
+	}
+	list++;
+    }
+    
+    if (buffer.count) {
+        if (maskFormat)
+	    exaGlyphsToMask(pMask, &buffer);
+        else
+	    exaGlyphsToDst(pSrc, pDst, &buffer);
+    }
+
+    if (maskFormat)
+    {
+	x = extents.x1;
+	y = extents.y1;
+	CompositePicture (op,
+			  pSrc,
+			  pMask,
+			  pDst,
+			  xSrc + x - first_xOff,
+			  ySrc + y - first_yOff,
+			  0, 0,
+			  x, y,
+			  width, height);
+	FreePicture ((pointer) pMask, (XID) 0);
+	(*pScreen->DestroyPixmap) (pMaskPixmap);
+    }
+}
diff --git a/exa/exa_migration_classic.c b/exa/exa_migration_classic.c
new file mode 100644
index 0000000..6c49fb7
--- /dev/null
+++ b/exa/exa_migration_classic.c
@@ -0,0 +1,745 @@
+/*
+ * Copyright © 2006 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *    Michel Dänzer <michel@tungstengraphics.com>
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+#if DEBUG_MIGRATE
+#define DBG_MIGRATE(a) ErrorF a
+#else
+#define DBG_MIGRATE(a)
+#endif
+
+/**
+ * The fallback path for UTS/DFS failing is to just memcpy.  exaCopyDirtyToSys
+ * and exaCopyDirtyToFb both needed to do this loop.
+ */
+static void
+exaMemcpyBox (PixmapPtr pPixmap, BoxPtr pbox, CARD8 *src, int src_pitch,
+	      CARD8 *dst, int dst_pitch)
+ {
+    int i, cpp = pPixmap->drawable.bitsPerPixel / 8;
+    int bytes = (pbox->x2 - pbox->x1) * cpp;
+
+    src += pbox->y1 * src_pitch + pbox->x1 * cpp;
+    dst += pbox->y1 * dst_pitch + pbox->x1 * cpp;
+
+    for (i = pbox->y2 - pbox->y1; i; i--) {
+	memcpy (dst, src, bytes);
+	src += src_pitch;
+	dst += dst_pitch;
+    }
+}
+
+/**
+ * Returns TRUE if the pixmap is dirty (has been modified in its current
+ * location compared to the other), or lacks a private for tracking
+ * dirtiness.
+ */
+static Bool
+exaPixmapIsDirty (PixmapPtr pPix)
+{
+    ExaPixmapPriv (pPix);
+
+    if (pExaPixmap == NULL)
+	EXA_FatalErrorDebugWithRet(("EXA bug: exaPixmapIsDirty was called on a non-exa pixmap.\n"), TRUE);
+
+    if (!pExaPixmap->pDamage)
+	return FALSE;
+
+    return RegionNotEmpty(DamageRegion(pExaPixmap->pDamage)) ||
+	!RegionEqual(&pExaPixmap->validSys, &pExaPixmap->validFB);
+}
+
+/**
+ * Returns TRUE if the pixmap is either pinned in FB, or has a sufficient score
+ * to be considered "should be in framebuffer".  That's just anything that has
+ * had more acceleration than fallbacks, or has no score yet.
+ *
+ * Only valid if using a migration scheme that tracks score.
+ */
+static Bool
+exaPixmapShouldBeInFB (PixmapPtr pPix)
+{
+    ExaPixmapPriv (pPix);
+
+    if (exaPixmapIsPinned (pPix))
+	return TRUE;
+
+    return pExaPixmap->score >= 0;
+}
+
+/**
+ * If the pixmap is currently dirty, this copies at least the dirty area from
+ * FB to system or vice versa.  Both areas must be allocated.
+ */
+static void
+exaCopyDirty(ExaMigrationPtr migrate, RegionPtr pValidDst, RegionPtr pValidSrc,
+	     Bool (*transfer) (PixmapPtr pPix, int x, int y, int w, int h,
+			       char *sys, int sys_pitch), int fallback_index,
+	     void (*sync) (ScreenPtr pScreen))
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaPixmapPriv (pPixmap);
+    RegionPtr damage = DamageRegion (pExaPixmap->pDamage);
+    RegionRec CopyReg;
+    Bool save_use_gpu_copy;
+    int save_pitch;
+    BoxPtr pBox;
+    int nbox;
+    Bool access_prepared = FALSE;
+    Bool need_sync = FALSE;
+
+    /* Damaged bits are valid in current copy but invalid in other one */
+    if (pExaPixmap->use_gpu_copy) {
+	RegionUnion(&pExaPixmap->validFB, &pExaPixmap->validFB,
+		     damage);
+	RegionSubtract(&pExaPixmap->validSys, &pExaPixmap->validSys,
+			damage);
+    } else {
+	RegionUnion(&pExaPixmap->validSys, &pExaPixmap->validSys,
+		     damage);
+	RegionSubtract(&pExaPixmap->validFB, &pExaPixmap->validFB,
+			damage);
+    }
+
+    RegionEmpty(damage);
+
+    /* Copy bits valid in source but not in destination */
+    RegionNull(&CopyReg);
+    RegionSubtract(&CopyReg, pValidSrc, pValidDst);
+
+    if (migrate->as_dst) {
+	ExaScreenPriv (pPixmap->drawable.pScreen);
+
+	/* XXX: The pending damage region will be marked as damaged after the
+	 * operation, so it should serve as an upper bound for the region that
+	 * needs to be synchronized for the operation. Unfortunately, this
+	 * causes corruption in some cases, e.g. when starting compiz. See
+	 * https://bugs.freedesktop.org/show_bug.cgi?id=12916 .
+	 */
+	if (pExaScr->optimize_migration) {
+	    RegionPtr pending_damage = DamagePendingRegion(pExaPixmap->pDamage);
+
+#if DEBUG_MIGRATE
+	    if (RegionNil(pending_damage)) {
+		static Bool firsttime = TRUE;
+
+		if (firsttime) {
+		    ErrorF("%s: Pending damage region empty!\n", __func__);
+		    firsttime = FALSE;
+		}
+	    }
+#endif
+
+	    /* Try to prevent destination valid region from growing too many
+	     * rects by filling it up to the extents of the union of the
+	     * destination valid region and the pending damage region.
+	     */
+	    if (RegionNumRects(pValidDst) > 10) {
+		BoxRec box;
+		BoxPtr pValidExt, pDamageExt;
+		RegionRec closure;
+
+		pValidExt = RegionExtents(pValidDst);
+		pDamageExt = RegionExtents(pending_damage);
+
+		box.x1 = min(pValidExt->x1, pDamageExt->x1);
+		box.y1 = min(pValidExt->y1, pDamageExt->y1);
+		box.x2 = max(pValidExt->x2, pDamageExt->x2);
+		box.y2 = max(pValidExt->y2, pDamageExt->y2);
+
+		RegionInit(&closure, &box, 0);
+		RegionIntersect(&CopyReg, &CopyReg, &closure);
+	    } else
+		RegionIntersect(&CopyReg, &CopyReg, pending_damage);
+	}
+
+	/* The caller may provide a region to be subtracted from the calculated
+	 * dirty region. This is to avoid migration of bits that don't
+	 * contribute to the result of the operation.
+	 */
+	if (migrate->pReg)
+	    RegionSubtract(&CopyReg, &CopyReg, migrate->pReg);
+    } else {
+	/* The caller may restrict the region to be migrated for source pixmaps
+	 * to what's relevant for the operation.
+	 */
+	if (migrate->pReg)
+	    RegionIntersect(&CopyReg, &CopyReg, migrate->pReg);
+    }
+
+    pBox = RegionRects(&CopyReg);
+    nbox = RegionNumRects(&CopyReg);
+
+    save_use_gpu_copy = pExaPixmap->use_gpu_copy;
+    save_pitch = pPixmap->devKind;
+    pExaPixmap->use_gpu_copy = TRUE;
+    pPixmap->devKind = pExaPixmap->fb_pitch;
+
+    while (nbox--) {
+	pBox->x1 = max(pBox->x1, 0);
+	pBox->y1 = max(pBox->y1, 0);
+	pBox->x2 = min(pBox->x2, pPixmap->drawable.width);
+	pBox->y2 = min(pBox->y2, pPixmap->drawable.height);
+
+	if (pBox->x1 >= pBox->x2 || pBox->y1 >= pBox->y2)
+	    continue;
+
+	if (!transfer || !transfer (pPixmap,
+				    pBox->x1, pBox->y1,
+				    pBox->x2 - pBox->x1,
+				    pBox->y2 - pBox->y1,
+				    (char *) (pExaPixmap->sys_ptr
+				    + pBox->y1 * pExaPixmap->sys_pitch
+				    + pBox->x1 * pPixmap->drawable.bitsPerPixel / 8),
+				    pExaPixmap->sys_pitch))
+	{
+	    if (!access_prepared) {
+		ExaDoPrepareAccess(pPixmap, fallback_index);
+		access_prepared = TRUE;
+	    }
+	    if (fallback_index == EXA_PREPARE_DEST) {
+		exaMemcpyBox (pPixmap, pBox,
+			      pExaPixmap->sys_ptr, pExaPixmap->sys_pitch,
+			      pPixmap->devPrivate.ptr, pPixmap->devKind);
+	    } else {
+		exaMemcpyBox (pPixmap, pBox,
+			      pPixmap->devPrivate.ptr, pPixmap->devKind,
+			      pExaPixmap->sys_ptr, pExaPixmap->sys_pitch);
+	    }
+	} else
+	    need_sync = TRUE;
+
+	pBox++;
+    }
+
+    pExaPixmap->use_gpu_copy = save_use_gpu_copy;
+    pPixmap->devKind = save_pitch;
+
+    /* Try to prevent source valid region from growing too many rects by
+     * removing parts of it which are also in the destination valid region.
+     * Removing anything beyond that would lead to data loss.
+     */
+    if (RegionNumRects(pValidSrc) > 20)
+	RegionSubtract(pValidSrc, pValidSrc, pValidDst);
+
+    /* The copied bits are now valid in destination */
+    RegionUnion(pValidDst, pValidDst, &CopyReg);
+
+    RegionUninit(&CopyReg);
+
+    if (access_prepared)
+	exaFinishAccess(&pPixmap->drawable, fallback_index);
+    else if (need_sync && sync)
+	sync (pPixmap->drawable.pScreen);
+}
+
+/**
+ * If the pixmap is currently dirty, this copies at least the dirty area from
+ * the framebuffer  memory copy to the system memory copy.  Both areas must be
+ * allocated.
+ */
+void
+exaCopyDirtyToSys (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaScreenPriv (pPixmap->drawable.pScreen);
+    ExaPixmapPriv (pPixmap);
+
+    exaCopyDirty(migrate, &pExaPixmap->validSys, &pExaPixmap->validFB,
+		 pExaScr->info->DownloadFromScreen, EXA_PREPARE_SRC,
+		 exaWaitSync);
+}
+
+/**
+ * If the pixmap is currently dirty, this copies at least the dirty area from
+ * the system memory copy to the framebuffer memory copy.  Both areas must be
+ * allocated.
+ */
+void
+exaCopyDirtyToFb (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaScreenPriv (pPixmap->drawable.pScreen);
+    ExaPixmapPriv (pPixmap);
+
+    exaCopyDirty(migrate, &pExaPixmap->validFB, &pExaPixmap->validSys,
+		 pExaScr->info->UploadToScreen, EXA_PREPARE_DEST, NULL);
+}
+
+/**
+ * Allocates a framebuffer copy of the pixmap if necessary, and then copies
+ * any necessary pixmap data into the framebuffer copy and points the pixmap at
+ * it.
+ *
+ * Note that when first allocated, a pixmap will have FALSE dirty flag.
+ * This is intentional because pixmap data starts out undefined.  So if we move
+ * it in due to the first operation against it being accelerated, it will have
+ * undefined framebuffer contents that we didn't have to upload.  If we do
+ * moveouts (and moveins) after the first movein, then we will only have to copy
+ * back and forth if the pixmap was written to after the last synchronization of
+ * the two copies.  Then, at exaPixmapSave (when the framebuffer copy goes away)
+ * we mark the pixmap dirty, so that the next exaMoveInPixmap will actually move
+ * all the data, since it's almost surely all valid now.
+ */
+static void
+exaDoMoveInPixmap (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv (pScreen);
+    ExaPixmapPriv (pPixmap);
+
+    /* If we're VT-switched away, no touching card memory allowed. */
+    if (pExaScr->swappedOut)
+	return;
+
+    /* If we're not allowed to move, then fail. */
+    if (exaPixmapIsPinned(pPixmap))
+	return;
+
+    /* Don't migrate in pixmaps which are less than 8bpp.  This avoids a lot of
+     * fragility in EXA, and <8bpp is probably not used enough any more to care
+     * (at least, not in acceleratd paths).
+     */
+    if (pPixmap->drawable.bitsPerPixel < 8)
+	return;
+
+    if (pExaPixmap->accel_blocked)
+	return;
+
+    if (pExaPixmap->area == NULL) {
+	pExaPixmap->area =
+	    exaOffscreenAlloc (pScreen, pExaPixmap->fb_size,
+			       pExaScr->info->pixmapOffsetAlign, FALSE,
+                               exaPixmapSave, (pointer) pPixmap);
+	if (pExaPixmap->area == NULL)
+	    return;
+
+	pExaPixmap->fb_ptr = (CARD8 *) pExaScr->info->memoryBase +
+				       pExaPixmap->area->offset;
+    }
+
+    exaCopyDirtyToFb (migrate);
+
+    if (exaPixmapHasGpuCopy(pPixmap))
+	return;
+
+    DBG_MIGRATE (("-> %p (0x%x) (%dx%d) (%c)\n", pPixmap,
+		  (ExaGetPixmapPriv(pPixmap)->area ?
+                   ExaGetPixmapPriv(pPixmap)->area->offset : 0),
+		  pPixmap->drawable.width,
+		  pPixmap->drawable.height,
+		  exaPixmapIsDirty(pPixmap) ? 'd' : 'c'));
+
+    pExaPixmap->use_gpu_copy = TRUE;
+
+    pPixmap->devKind = pExaPixmap->fb_pitch;
+    pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+}
+
+void
+exaMoveInPixmap_classic (PixmapPtr pPixmap)
+{
+    static ExaMigrationRec migrate = { .as_dst = FALSE, .as_src = TRUE,
+				       .pReg = NULL };
+
+    migrate.pPix = pPixmap;
+    exaDoMoveInPixmap (&migrate);
+}
+
+/**
+ * Switches the current active location of the pixmap to system memory, copying
+ * updated data out if necessary.
+ */
+static void
+exaDoMoveOutPixmap (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaPixmapPriv (pPixmap);
+
+    if (!pExaPixmap->area || exaPixmapIsPinned(pPixmap))
+	return;
+
+    exaCopyDirtyToSys (migrate);
+
+    if (exaPixmapHasGpuCopy(pPixmap)) {
+
+	DBG_MIGRATE (("<- %p (%p) (%dx%d) (%c)\n", pPixmap,
+		      (void*)(ExaGetPixmapPriv(pPixmap)->area ?
+			      ExaGetPixmapPriv(pPixmap)->area->offset : 0),
+		      pPixmap->drawable.width,
+		      pPixmap->drawable.height,
+		      exaPixmapIsDirty(pPixmap) ? 'd' : 'c'));
+
+	pExaPixmap->use_gpu_copy = FALSE;
+
+	pPixmap->devKind = pExaPixmap->sys_pitch;
+	pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+    }
+}
+
+void
+exaMoveOutPixmap_classic (PixmapPtr pPixmap)
+{
+    static ExaMigrationRec migrate = { .as_dst = FALSE, .as_src = TRUE,
+				       .pReg = NULL };
+
+    migrate.pPix = pPixmap;
+    exaDoMoveOutPixmap (&migrate);
+}
+
+
+/**
+ * Copies out important pixmap data and removes references to framebuffer area.
+ * Called when the memory manager decides it's time to kick the pixmap out of
+ * framebuffer entirely.
+ */
+void
+exaPixmapSave (ScreenPtr pScreen, ExaOffscreenArea *area)
+{
+    PixmapPtr pPixmap = area->privData;
+    ExaPixmapPriv(pPixmap);
+
+    exaMoveOutPixmap(pPixmap);
+
+    pExaPixmap->fb_ptr = NULL;
+    pExaPixmap->area = NULL;
+
+    /* Mark all FB bits as invalid, so all valid system bits get copied to FB
+     * next time */
+    RegionEmpty(&pExaPixmap->validFB);
+}
+
+/**
+ * For the "greedy" migration scheme, pushes the pixmap toward being located in
+ * framebuffer memory.
+ */
+static void
+exaMigrateTowardFb (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaPixmapPriv (pPixmap);
+
+    if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED) {
+	DBG_MIGRATE(("UseScreen: not migrating pinned pixmap %p\n",
+		     (pointer)pPixmap));
+	return;
+    }
+
+    DBG_MIGRATE(("UseScreen %p score %d\n",
+		 (pointer)pPixmap, pExaPixmap->score));
+
+    if (pExaPixmap->score == EXA_PIXMAP_SCORE_INIT) {
+	exaDoMoveInPixmap(migrate);
+	pExaPixmap->score = 0;
+    }
+
+    if (pExaPixmap->score < EXA_PIXMAP_SCORE_MAX)
+	pExaPixmap->score++;
+
+    if (pExaPixmap->score >= EXA_PIXMAP_SCORE_MOVE_IN &&
+	!exaPixmapHasGpuCopy(pPixmap))
+    {
+	exaDoMoveInPixmap(migrate);
+    }
+
+    if (exaPixmapHasGpuCopy(pPixmap)) {
+	exaCopyDirtyToFb (migrate);
+	ExaOffscreenMarkUsed (pPixmap);
+    } else
+	exaCopyDirtyToSys (migrate);
+}
+
+/**
+ * For the "greedy" migration scheme, pushes the pixmap toward being located in
+ * system memory.
+ */
+static void
+exaMigrateTowardSys (ExaMigrationPtr migrate)
+{
+    PixmapPtr pPixmap = migrate->pPix;
+    ExaPixmapPriv (pPixmap);
+
+    DBG_MIGRATE(("UseMem: %p score %d\n", (pointer)pPixmap, pExaPixmap->score));
+
+    if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
+	return;
+
+    if (pExaPixmap->score == EXA_PIXMAP_SCORE_INIT)
+	pExaPixmap->score = 0;
+
+    if (pExaPixmap->score > EXA_PIXMAP_SCORE_MIN)
+	pExaPixmap->score--;
+
+    if (pExaPixmap->score <= EXA_PIXMAP_SCORE_MOVE_OUT && pExaPixmap->area)
+	exaDoMoveOutPixmap(migrate);
+
+    if (exaPixmapHasGpuCopy(pPixmap)) {
+	exaCopyDirtyToFb (migrate);
+	ExaOffscreenMarkUsed (pPixmap);
+    } else
+	exaCopyDirtyToSys (migrate);
+}
+
+/**
+ * If the pixmap has both a framebuffer and system memory copy, this function
+ * asserts that both of them are the same.
+ */
+static Bool
+exaAssertNotDirty (PixmapPtr pPixmap)
+{
+    ExaPixmapPriv (pPixmap);
+    CARD8 *dst, *src;
+    RegionRec ValidReg;
+    int dst_pitch, src_pitch, cpp, y, nbox, save_pitch;
+    BoxPtr pBox;
+    Bool ret = TRUE, save_use_gpu_copy;
+
+    if (exaPixmapIsPinned(pPixmap) || pExaPixmap->area == NULL)
+	return ret;
+
+    RegionNull(&ValidReg);
+    RegionIntersect(&ValidReg, &pExaPixmap->validFB,
+		     &pExaPixmap->validSys);
+    nbox = RegionNumRects(&ValidReg);
+
+    if (!nbox)
+	goto out;
+
+    pBox = RegionRects(&ValidReg);
+
+    dst_pitch = pExaPixmap->sys_pitch;
+    src_pitch = pExaPixmap->fb_pitch;
+    cpp = pPixmap->drawable.bitsPerPixel / 8;
+
+    save_use_gpu_copy = pExaPixmap->use_gpu_copy;
+    save_pitch = pPixmap->devKind;
+    pExaPixmap->use_gpu_copy = TRUE;
+    pPixmap->devKind = pExaPixmap->fb_pitch;
+
+    if (!ExaDoPrepareAccess(pPixmap, EXA_PREPARE_SRC))
+	goto skip;
+
+    while (nbox--) {
+	    int rowbytes;
+
+	    pBox->x1 = max(pBox->x1, 0);
+	    pBox->y1 = max(pBox->y1, 0);
+	    pBox->x2 = min(pBox->x2, pPixmap->drawable.width);
+	    pBox->y2 = min(pBox->y2, pPixmap->drawable.height);
+
+	    if (pBox->x1 >= pBox->x2 || pBox->y1 >= pBox->y2)
+		continue;
+
+	    rowbytes = (pBox->x2 - pBox->x1) * cpp;
+	    src = (CARD8 *) pPixmap->devPrivate.ptr + pBox->y1 * src_pitch + pBox->x1 * cpp;
+	    dst = pExaPixmap->sys_ptr + pBox->y1 * dst_pitch + pBox->x1 * cpp;
+
+	    for (y = pBox->y1; y < pBox->y2;
+		 y++, src += src_pitch, dst += dst_pitch) {
+		if (memcmp(dst, src, rowbytes) != 0) {
+		    ret = FALSE;
+		    exaPixmapDirty(pPixmap, pBox->x1, pBox->y1, pBox->x2,
+				   pBox->y2);
+		    break;
+		}
+	    }
+    }
+
+skip:
+    exaFinishAccess(&pPixmap->drawable, EXA_PREPARE_SRC);
+
+    pExaPixmap->use_gpu_copy = save_use_gpu_copy;
+    pPixmap->devKind = save_pitch;
+
+out:
+    RegionUninit(&ValidReg);
+    return ret;
+}
+
+/**
+ * Performs migration of the pixmaps according to the operation information
+ * provided in pixmaps and can_accel and the migration scheme chosen in the
+ * config file.
+ */
+void
+exaDoMigration_classic (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel)
+{
+    ScreenPtr pScreen = pixmaps[0].pPix->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    int i, j;
+
+    /* If this debugging flag is set, check each pixmap for whether it is marked
+     * as clean, and if so, actually check if that's the case.  This should help
+     * catch issues with failing to mark a drawable as dirty.  While it will
+     * catch them late (after the operation happened), it at least explains what
+     * went wrong, and instrumenting the code to find what operation happened
+     * to the pixmap last shouldn't be hard.
+     */
+    if (pExaScr->checkDirtyCorrectness) {
+	for (i = 0; i < npixmaps; i++) {
+	    if (!exaPixmapIsDirty (pixmaps[i].pPix) &&
+		!exaAssertNotDirty (pixmaps[i].pPix))
+		ErrorF("%s: Pixmap %d dirty but not marked as such!\n", __func__, i);
+	}
+    }
+    /* If anything is pinned in system memory, we won't be able to
+     * accelerate.
+     */
+    for (i = 0; i < npixmaps; i++) {
+	if (exaPixmapIsPinned (pixmaps[i].pPix) &&
+	    !exaPixmapHasGpuCopy (pixmaps[i].pPix))
+	{
+	    EXA_FALLBACK(("Pixmap %p (%dx%d) pinned in sys\n", pixmaps[i].pPix,
+		      pixmaps[i].pPix->drawable.width,
+		      pixmaps[i].pPix->drawable.height));
+	    can_accel = FALSE;
+	    break;
+	}
+    }
+
+    if (pExaScr->migration == ExaMigrationSmart) {
+	/* If we've got something as a destination that we shouldn't cause to
+	 * become newly dirtied, take the unaccelerated route.
+	 */
+	for (i = 0; i < npixmaps; i++) {
+	    if (pixmaps[i].as_dst && !exaPixmapShouldBeInFB (pixmaps[i].pPix) &&
+		!exaPixmapIsDirty (pixmaps[i].pPix))
+	    {
+		for (i = 0; i < npixmaps; i++) {
+		    if (!exaPixmapIsDirty (pixmaps[i].pPix))
+			exaDoMoveOutPixmap (pixmaps + i);
+		}
+		return;
+	    }
+	}
+
+	/* If we aren't going to accelerate, then we migrate everybody toward
+	 * system memory, and kick out if it's free.
+	 */
+	if (!can_accel) {
+	    for (i = 0; i < npixmaps; i++) {
+		exaMigrateTowardSys (pixmaps + i);
+		if (!exaPixmapIsDirty (pixmaps[i].pPix))
+		    exaDoMoveOutPixmap (pixmaps + i);
+	    }
+	    return;
+	}
+
+	/* Finally, the acceleration path.  Move them all in. */
+	for (i = 0; i < npixmaps; i++) {
+	    exaMigrateTowardFb(pixmaps + i);
+	    exaDoMoveInPixmap(pixmaps + i);
+	}
+    } else if (pExaScr->migration == ExaMigrationGreedy) {
+	/* If we can't accelerate, either because the driver can't or because one of
+	 * the pixmaps is pinned in system memory, then we migrate everybody toward
+	 * system memory.
+	 *
+	 * We also migrate toward system if all pixmaps involved are currently in
+	 * system memory -- this can mitigate thrashing when there are significantly
+	 * more pixmaps active than would fit in memory.
+	 *
+	 * If not, then we migrate toward FB so that hopefully acceleration can
+	 * happen.
+	 */
+	if (!can_accel) {
+	    for (i = 0; i < npixmaps; i++)
+		exaMigrateTowardSys (pixmaps + i);
+	    return;
+	}
+
+	for (i = 0; i < npixmaps; i++) {
+	    if (exaPixmapHasGpuCopy(pixmaps[i].pPix)) {
+		/* Found one in FB, so move all to FB. */
+		for (j = 0; j < npixmaps; j++)
+		    exaMigrateTowardFb(pixmaps + i);
+		return;
+	    }
+	}
+
+	/* Nobody's in FB, so move all away from FB. */
+	for (i = 0; i < npixmaps; i++)
+	    exaMigrateTowardSys(pixmaps + i);
+    } else if (pExaScr->migration == ExaMigrationAlways) {
+	/* Always move the pixmaps out if we can't accelerate.  If we can
+	 * accelerate, try to move them all in.  If that fails, then move them
+	 * back out.
+	 */
+	if (!can_accel) {
+	    for (i = 0; i < npixmaps; i++)
+		exaDoMoveOutPixmap(pixmaps + i);
+	    return;
+	}
+
+	/* Now, try to move them all into FB */
+	for (i = 0; i < npixmaps; i++) {
+	    exaDoMoveInPixmap(pixmaps + i);
+	}
+
+	/* If we couldn't fit everything in, abort */
+	for (i = 0; i < npixmaps; i++) {
+	    if (!exaPixmapHasGpuCopy(pixmaps[i].pPix)) {
+		return;
+	    }
+	}
+
+	/* Yay, everything has a gpu copy, mark memory as used */
+	for (i = 0; i < npixmaps; i++) {
+	    ExaOffscreenMarkUsed (pixmaps[i].pPix);
+	}
+    }
+}
+
+void
+exaPrepareAccessReg_classic(PixmapPtr pPixmap, int index, RegionPtr pReg)
+{
+    ExaMigrationRec pixmaps[1];
+
+    if (index == EXA_PREPARE_DEST || index == EXA_PREPARE_AUX_DEST) {
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+    } else {
+	pixmaps[0].as_dst = FALSE;
+	pixmaps[0].as_src = TRUE;
+    }
+    pixmaps[0].pPix = pPixmap;
+    pixmaps[0].pReg = pReg;
+
+    exaDoMigration(pixmaps, 1, FALSE);
+
+    (void)ExaDoPrepareAccess(pPixmap, index);
+}
diff --git a/exa/exa_migration_mixed.c b/exa/exa_migration_mixed.c
new file mode 100644
index 0000000..fb47151
--- /dev/null
+++ b/exa/exa_migration_mixed.c
@@ -0,0 +1,261 @@
+/*
+ * Copyright © 2009 Maarten Maathuis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+void
+exaCreateDriverPixmap_mixed(PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    ExaPixmapPriv(pPixmap);
+    int w = pPixmap->drawable.width, h = pPixmap->drawable.height;
+    int depth = pPixmap->drawable.depth, bpp = pPixmap->drawable.bitsPerPixel;
+    int usage_hint = pPixmap->usage_hint;
+    int paddedWidth = pExaPixmap->sys_pitch;
+
+    /* Already done. */
+    if (pExaPixmap->driverPriv)
+	return;
+
+    if (exaPixmapIsPinned(pPixmap))
+	return;
+
+    /* Can't accel 1/4 bpp. */
+    if (pExaPixmap->accel_blocked || bpp < 8)
+	return;
+
+    if (pExaScr->info->CreatePixmap2) {
+	int new_pitch = 0;
+        pExaPixmap->driverPriv = pExaScr->info->CreatePixmap2(pScreen, w, h, depth, usage_hint, bpp, &new_pitch);
+	paddedWidth = pExaPixmap->fb_pitch = new_pitch;
+    } else {
+	if (paddedWidth < pExaPixmap->fb_pitch)
+	    paddedWidth = pExaPixmap->fb_pitch;
+	pExaPixmap->driverPriv = pExaScr->info->CreatePixmap(pScreen, paddedWidth*h, 0);
+    }
+
+    if (!pExaPixmap->driverPriv)
+	return;
+
+    (*pScreen->ModifyPixmapHeader)(pPixmap, w, h, 0, 0,
+				paddedWidth, NULL);
+}
+
+void
+exaDoMigration_mixed(ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel)
+{
+    int i;
+
+    /* If anything is pinned in system memory, we won't be able to
+     * accelerate.
+     */
+    for (i = 0; i < npixmaps; i++) {
+	if (exaPixmapIsPinned (pixmaps[i].pPix) &&
+	    !exaPixmapHasGpuCopy (pixmaps[i].pPix))
+	{
+	    can_accel = FALSE;
+	    break;
+	}
+    }
+
+    /* We can do nothing. */
+    if (!can_accel)
+	return;
+
+    for (i = 0; i < npixmaps; i++) {
+	PixmapPtr pPixmap = pixmaps[i].pPix;
+	ExaPixmapPriv(pPixmap);
+
+	if (!pExaPixmap->driverPriv)
+	    exaCreateDriverPixmap_mixed(pPixmap);
+
+	if (pExaPixmap->pDamage && exaPixmapHasGpuCopy(pPixmap)) {
+	    ExaScreenPriv(pPixmap->drawable.pScreen);
+
+	    /* This pitch is needed for proper acceleration. For some reason
+	     * there are pixmaps without pDamage and a bad fb_pitch value.
+	     * So setting devKind when only exaPixmapHasGpuCopy() is true
+	     * causes corruption. Pixmaps without pDamage are not migrated
+	     * and should have a valid devKind at all times, so that's why this
+	     * isn't causing problems. Pixmaps have their gpu pitch set the
+	     * first time in the MPH call from exaCreateDriverPixmap_mixed().
+	     */
+	    pPixmap->devKind = pExaPixmap->fb_pitch;
+	    exaCopyDirtyToFb(pixmaps + i);
+
+	    if (pExaScr->deferred_mixed_pixmap == pPixmap &&
+		!pixmaps[i].as_dst && !pixmaps[i].pReg)
+		pExaScr->deferred_mixed_pixmap = NULL;
+	}
+
+	pExaPixmap->use_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+    }
+}
+
+void
+exaMoveInPixmap_mixed(PixmapPtr pPixmap)
+{
+    ExaMigrationRec pixmaps[1];
+
+    pixmaps[0].as_dst = FALSE;
+    pixmaps[0].as_src = TRUE;
+    pixmaps[0].pPix = pPixmap;
+    pixmaps[0].pReg = NULL;
+
+    exaDoMigration(pixmaps, 1, TRUE);
+}
+
+void
+exaDamageReport_mixed(DamagePtr pDamage, RegionPtr pRegion, void *closure)
+{
+    PixmapPtr pPixmap = closure;
+    ExaPixmapPriv(pPixmap);
+
+    /* Move back results of software rendering on system memory copy of mixed driver
+     * pixmap (see exaPrepareAccessReg_mixed).
+     *
+     * Defer moving the destination back into the driver pixmap, to try and save
+     * overhead on multiple subsequent software fallbacks.
+     */
+    if (!pExaPixmap->use_gpu_copy && exaPixmapHasGpuCopy(pPixmap)) {
+	ExaScreenPriv(pPixmap->drawable.pScreen);
+
+	if (pExaScr->deferred_mixed_pixmap &&
+	    pExaScr->deferred_mixed_pixmap != pPixmap)
+	    exaMoveInPixmap_mixed(pExaScr->deferred_mixed_pixmap);
+	pExaScr->deferred_mixed_pixmap = pPixmap;
+    }
+}
+
+/* With mixed pixmaps, if we fail to get direct access to the driver pixmap, we
+ * use the DownloadFromScreen hook to retrieve contents to a copy in system
+ * memory, perform software rendering on that and move back the results with the
+ * UploadToScreen hook (see exaDamageReport_mixed).
+ */
+void
+exaPrepareAccessReg_mixed(PixmapPtr pPixmap, int index, RegionPtr pReg)
+{
+    ExaPixmapPriv(pPixmap);
+    Bool has_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+    Bool success;
+
+    success = ExaDoPrepareAccess(pPixmap, index);
+
+    if (success && has_gpu_copy && pExaPixmap->pDamage) {
+	/* You cannot do accelerated operations while a buffer is mapped. */
+	exaFinishAccess(&pPixmap->drawable, index);
+	/* Update the gpu view of both deferred destination pixmaps and of
+	 * source pixmaps that were migrated with a bounding region.
+	 */
+	exaMoveInPixmap_mixed(pPixmap);
+	success = ExaDoPrepareAccess(pPixmap, index);
+
+	if (success) {
+	    /* We have a gpu pixmap that can be accessed, we don't need the cpu
+	     * copy anymore. Drivers that prefer DFS, should fail prepare
+	     * access.
+	     */
+	    DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    DamageDestroy(pExaPixmap->pDamage);
+	    pExaPixmap->pDamage = NULL;
+
+	    free(pExaPixmap->sys_ptr);
+	    pExaPixmap->sys_ptr = NULL;
+
+	    return;
+	}
+    }
+
+    if (!success) {
+	ExaMigrationRec pixmaps[1];
+
+	/* Do we need to allocate our system buffer? */
+	if (!pExaPixmap->sys_ptr) {
+	    pExaPixmap->sys_ptr = malloc(pExaPixmap->sys_pitch *
+					 pPixmap->drawable.height);
+	    if (!pExaPixmap->sys_ptr)
+		FatalError("EXA: malloc failed for size %d bytes\n",
+			   pExaPixmap->sys_pitch * pPixmap->drawable.height);
+	}
+
+	if (index == EXA_PREPARE_DEST || index == EXA_PREPARE_AUX_DEST) {
+	    pixmaps[0].as_dst = TRUE;
+	    pixmaps[0].as_src = FALSE;
+	} else {
+	    pixmaps[0].as_dst = FALSE;
+	    pixmaps[0].as_src = TRUE;
+	}
+	pixmaps[0].pPix = pPixmap;
+	pixmaps[0].pReg = pReg;
+
+	if (!pExaPixmap->pDamage &&
+		(has_gpu_copy || !exaPixmapIsPinned(pPixmap))) {
+	    Bool as_dst = pixmaps[0].as_dst;
+
+	    /* Set up damage tracking */
+	    pExaPixmap->pDamage = DamageCreate(exaDamageReport_mixed, NULL,
+					       DamageReportNonEmpty, TRUE,
+					       pPixmap->drawable.pScreen,
+					       pPixmap);
+
+	    DamageRegister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    /* This ensures that pending damage reflects the current operation. */
+	    /* This is used by exa to optimize migration. */
+	    DamageSetReportAfterOp(pExaPixmap->pDamage, TRUE);
+
+	    if (has_gpu_copy) {
+		exaPixmapDirty(pPixmap, 0, 0, pPixmap->drawable.width,
+			       pPixmap->drawable.height);
+
+		/* We don't know which region of the destination will be damaged,
+		 * have to assume all of it
+		 */
+		if (as_dst) {
+		    pixmaps[0].as_dst = FALSE;
+		    pixmaps[0].as_src = TRUE;
+		    pixmaps[0].pReg = NULL;
+		}
+		exaCopyDirtyToSys(pixmaps);
+	    }
+
+	    if (as_dst)
+		exaPixmapDirty(pPixmap, 0, 0, pPixmap->drawable.width,
+			       pPixmap->drawable.height);
+	} else if (has_gpu_copy)
+	    exaCopyDirtyToSys(pixmaps);
+
+	pPixmap->devPrivate.ptr = pExaPixmap->sys_ptr;
+	pPixmap->devKind = pExaPixmap->sys_pitch;
+	pExaPixmap->use_gpu_copy = FALSE;
+    }
+}
+
diff --git a/exa/exa_mixed.c b/exa/exa_mixed.c
new file mode 100644
index 0000000..fd1afb2
--- /dev/null
+++ b/exa/exa_mixed.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright © 2009 Maarten Maathuis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+
+#include "exa_priv.h"
+#include "exa.h"
+
+/* This file holds the driver allocated pixmaps + better initial placement code.
+ */
+
+static _X_INLINE void*
+ExaGetPixmapAddress(PixmapPtr p)
+{
+    ExaPixmapPriv(p);
+
+    return pExaPixmap->sys_ptr;
+}
+
+/**
+ * exaCreatePixmap() creates a new pixmap.
+ */
+PixmapPtr
+exaCreatePixmap_mixed(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint)
+{
+    PixmapPtr pPixmap;
+    ExaPixmapPrivPtr	pExaPixmap;
+    int bpp;
+    size_t paddedWidth;
+    ExaScreenPriv(pScreen);
+
+    if (w > 32767 || h > 32767)
+	return NullPixmap;
+
+    swap(pExaScr, pScreen, CreatePixmap);
+    pPixmap = pScreen->CreatePixmap(pScreen, 0, 0, depth, usage_hint);
+    swap(pExaScr, pScreen, CreatePixmap);
+
+    if (!pPixmap)
+        return NULL;
+
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+    pExaPixmap->driverPriv = NULL;
+
+    bpp = pPixmap->drawable.bitsPerPixel;
+
+    paddedWidth = ((w * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
+    if (paddedWidth / 4 > 32767 || h > 32767)
+        return NullPixmap;
+
+    /* We will allocate the system pixmap later if needed. */
+    pPixmap->devPrivate.ptr = NULL;
+    pExaPixmap->sys_ptr = NULL;
+    pExaPixmap->sys_pitch = paddedWidth;
+
+    pExaPixmap->area = NULL;
+    pExaPixmap->fb_ptr = NULL;
+    pExaPixmap->pDamage = NULL;
+
+    exaSetFbPitch(pExaScr, pExaPixmap, w, h, bpp);
+    exaSetAccelBlock(pExaScr, pExaPixmap,
+	w, h, bpp);
+
+    (*pScreen->ModifyPixmapHeader)(pPixmap, w, h, 0, 0,
+				    paddedWidth, NULL);
+
+    /* A scratch pixmap will become a driver pixmap right away. */
+    if (!w || !h) {
+	exaCreateDriverPixmap_mixed(pPixmap);
+	pExaPixmap->use_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+    } else {
+	pExaPixmap->use_gpu_copy = FALSE;
+
+	if (w == 1 && h == 1) {
+	    pExaPixmap->sys_ptr = malloc(paddedWidth);
+
+	    /* Set up damage tracking */
+	    pExaPixmap->pDamage = DamageCreate(exaDamageReport_mixed, NULL,
+					       DamageReportNonEmpty, TRUE,
+					       pPixmap->drawable.pScreen,
+					       pPixmap);
+
+	    DamageRegister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    /* This ensures that pending damage reflects the current operation. */
+	    /* This is used by exa to optimize migration. */
+	    DamageSetReportAfterOp(pExaPixmap->pDamage, TRUE);
+	}
+    }
+
+    /* During a fallback we must prepare access. */
+    if (pExaScr->fallback_counter)
+	exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_AUX_DEST);
+
+    return pPixmap;
+}
+
+Bool
+exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData)
+{
+    ScreenPtr pScreen;
+    ExaScreenPrivPtr pExaScr;
+    ExaPixmapPrivPtr pExaPixmap;
+    Bool ret, has_gpu_copy;
+
+    if (!pPixmap)
+        return FALSE;
+
+    pScreen = pPixmap->drawable.pScreen;
+    pExaScr = ExaGetScreenPriv(pScreen);
+    pExaPixmap = ExaGetPixmapPriv(pPixmap);
+
+    if (pPixData) {
+	if (pExaPixmap->driverPriv) {
+	    if (pExaPixmap->pDamage) {
+		DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+		DamageDestroy(pExaPixmap->pDamage);
+		pExaPixmap->pDamage = NULL;
+	    }
+
+	    pExaScr->info->DestroyPixmap(pScreen, pExaPixmap->driverPriv);
+	    pExaPixmap->driverPriv = NULL;
+	}
+
+	pExaPixmap->use_gpu_copy = FALSE;
+	pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
+    }
+
+    has_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+
+    if (width <= 0)
+	width = pPixmap->drawable.width;
+
+    if (height <= 0)
+	height = pPixmap->drawable.height;
+
+    if (bitsPerPixel <= 0) {
+	if (depth <= 0)
+	    bitsPerPixel = pPixmap->drawable.bitsPerPixel;
+	else
+	    bitsPerPixel = BitsPerPixel(depth);
+    }
+
+    if (depth <= 0)
+	depth = pPixmap->drawable.depth;
+
+    if (width != pPixmap->drawable.width ||
+	height != pPixmap->drawable.height ||
+	depth != pPixmap->drawable.depth ||
+	bitsPerPixel != pPixmap->drawable.bitsPerPixel) {
+	if (pExaPixmap->driverPriv) {
+	    if (devKind > 0)
+		pExaPixmap->fb_pitch = devKind;
+	    else
+		exaSetFbPitch(pExaScr, pExaPixmap, width, height, bitsPerPixel);
+
+            exaSetAccelBlock(pExaScr, pExaPixmap,
+                             width, height, bitsPerPixel);
+            RegionEmpty(&pExaPixmap->validFB);
+        }
+
+	/* Need to re-create system copy if there's also a GPU copy */
+	if (has_gpu_copy && pExaPixmap->sys_ptr) {
+	    free(pExaPixmap->sys_ptr);
+	    pExaPixmap->sys_ptr = NULL;
+	    pExaPixmap->sys_pitch = PixmapBytePad(width, depth);
+	    DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    DamageDestroy(pExaPixmap->pDamage);
+	    pExaPixmap->pDamage = NULL;
+	    RegionEmpty(&pExaPixmap->validSys);
+
+	    if (pExaScr->deferred_mixed_pixmap == pPixmap)
+		pExaScr->deferred_mixed_pixmap = NULL;
+	}
+    }
+
+    if (has_gpu_copy) {
+	pPixmap->devPrivate.ptr = pExaPixmap->fb_ptr;
+	pPixmap->devKind = pExaPixmap->fb_pitch;
+    } else {
+	pPixmap->devPrivate.ptr = pExaPixmap->sys_ptr;
+	pPixmap->devKind = pExaPixmap->sys_pitch;
+    }
+
+    /* Only pass driver pixmaps to the driver. */
+    if (pExaScr->info->ModifyPixmapHeader && pExaPixmap->driverPriv) {
+	ret = pExaScr->info->ModifyPixmapHeader(pPixmap, width, height, depth,
+						bitsPerPixel, devKind, pPixData);
+	if (ret == TRUE)
+	    goto out;
+    }
+
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+    ret = pScreen->ModifyPixmapHeader(pPixmap, width, height, depth,
+					    bitsPerPixel, devKind, pPixData);
+    swap(pExaScr, pScreen, ModifyPixmapHeader);
+
+out:
+    if (has_gpu_copy) {
+	pExaPixmap->fb_ptr = pPixmap->devPrivate.ptr;
+	pExaPixmap->fb_pitch = pPixmap->devKind;
+    } else {
+	pExaPixmap->sys_ptr = pPixmap->devPrivate.ptr;
+	pExaPixmap->sys_pitch = pPixmap->devKind;
+    }
+    /* Always NULL this, we don't want lingering pointers. */
+    pPixmap->devPrivate.ptr = NULL;
+
+    return ret;
+}
+
+Bool
+exaDestroyPixmap_mixed(PixmapPtr pPixmap)
+{
+    ScreenPtr	pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    Bool ret;
+
+    if (pPixmap->refcnt == 1)
+    {
+	ExaPixmapPriv (pPixmap);
+
+	exaDestroyPixmap(pPixmap);
+
+	if (pExaScr->deferred_mixed_pixmap == pPixmap)
+	    pExaScr->deferred_mixed_pixmap = NULL;
+
+	if (pExaPixmap->driverPriv)
+	    pExaScr->info->DestroyPixmap(pScreen, pExaPixmap->driverPriv);
+	pExaPixmap->driverPriv = NULL;
+
+	if (pExaPixmap->pDamage) {
+	    free(pExaPixmap->sys_ptr);
+	    pExaPixmap->sys_ptr = NULL;
+	    pExaPixmap->pDamage = NULL;
+	}
+    }
+
+    swap(pExaScr, pScreen, DestroyPixmap);
+    ret = pScreen->DestroyPixmap (pPixmap);
+    swap(pExaScr, pScreen, DestroyPixmap);
+
+    return ret;
+}
+
+Bool
+exaPixmapHasGpuCopy_mixed(PixmapPtr pPixmap)
+{
+    ScreenPtr pScreen = pPixmap->drawable.pScreen;
+    ExaScreenPriv(pScreen);
+    ExaPixmapPriv(pPixmap);
+    pointer saved_ptr;
+    Bool ret;
+
+    if (!pExaPixmap->driverPriv)
+	return FALSE;
+
+    saved_ptr = pPixmap->devPrivate.ptr;
+    pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
+    ret = pExaScr->info->PixmapIsOffscreen(pPixmap);
+    pPixmap->devPrivate.ptr = saved_ptr;
+
+    return ret;
+}
diff --git a/exa/exa_offscreen.c b/exa/exa_offscreen.c
new file mode 100644
index 0000000..5abe3b8
--- /dev/null
+++ b/exa/exa_offscreen.c
@@ -0,0 +1,696 @@
+/*
+ * Copyright © 2003 Anders Carlsson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Anders Carlsson not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Anders Carlsson makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * ANDERS CARLSSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL ANDERS CARLSSON BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/** @file
+ * This allocator allocates blocks of memory by maintaining a list of areas.
+ * When allocating, the contiguous block of areas with the minimum eviction
+ * cost is found and evicted in order to make room for the new allocation.
+ */
+
+#include "exa_priv.h"
+
+#include <limits.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#if DEBUG_OFFSCREEN
+#define DBG_OFFSCREEN(a) ErrorF a
+#else
+#define DBG_OFFSCREEN(a)
+#endif
+
+#if DEBUG_OFFSCREEN
+static void
+ExaOffscreenValidate (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+    ExaOffscreenArea *prev = 0, *area;
+
+    assert (pExaScr->info->offScreenAreas->base_offset == 
+	    pExaScr->info->offScreenBase);
+    for (area = pExaScr->info->offScreenAreas; area; area = area->next)
+    {
+	assert (area->offset >= area->base_offset &&
+		area->offset < (area->base_offset + area->size));
+	if (prev)
+	    assert (prev->base_offset + prev->size == area->base_offset);
+	prev = area;
+    }
+    assert (prev->base_offset + prev->size == pExaScr->info->memorySize);
+}
+#else
+#define ExaOffscreenValidate(s)
+#endif
+
+static ExaOffscreenArea *
+ExaOffscreenKickOut (ScreenPtr pScreen, ExaOffscreenArea *area)
+{
+    if (area->save)
+	(*area->save) (pScreen, area);
+    return exaOffscreenFree (pScreen, area);
+}
+
+static void
+exaUpdateEvictionCost(ExaOffscreenArea *area, unsigned offScreenCounter)
+{
+    unsigned age;
+
+    if (area->state == ExaOffscreenAvail)
+	return;
+
+    age = offScreenCounter - area->last_use;
+
+    /* This is unlikely to happen, but could result in a division by zero... */
+    if (age > (UINT_MAX / 2)) {
+	age = UINT_MAX / 2;
+	area->last_use = offScreenCounter - age;
+    }
+
+    area->eviction_cost = area->size / age;
+}
+
+static ExaOffscreenArea *
+exaFindAreaToEvict(ExaScreenPrivPtr pExaScr, int size, int align)
+{
+    ExaOffscreenArea *begin, *end, *best;
+    unsigned cost, best_cost;
+    int avail, real_size;
+
+    best_cost = UINT_MAX;
+    begin = end = pExaScr->info->offScreenAreas;
+    avail = 0;
+    cost = 0;
+    best = 0;
+
+    while (end != NULL)
+    {
+	restart:
+	while (begin != NULL && begin->state == ExaOffscreenLocked)
+	    begin = end = begin->next;
+
+	if (begin == NULL)
+	    break;
+
+	/* adjust size needed to account for alignment loss for this area */
+	real_size = size + (begin->base_offset + begin->size - size) % align;
+
+	while (avail < real_size && end != NULL)
+	{
+	    if (end->state == ExaOffscreenLocked) {
+		/* Can't more room here, restart after this locked area */
+		avail = 0;
+		cost = 0;
+		begin = end;
+		goto restart;
+	    }
+	    avail += end->size;
+	    exaUpdateEvictionCost(end, pExaScr->offScreenCounter);
+	    cost += end->eviction_cost;
+	    end = end->next;
+	}
+
+	/* Check the cost, update best */
+	if (avail >= real_size && cost < best_cost) {
+	    best = begin;
+	    best_cost = cost;
+	}
+
+	avail -= begin->size;
+	cost -= begin->eviction_cost;
+	begin = begin->next;
+    }
+
+    return best;
+}
+
+/**
+ * exaOffscreenAlloc allocates offscreen memory
+ *
+ * @param pScreen current screen
+ * @param size size in bytes of the allocation
+ * @param align byte alignment requirement for the offset of the allocated area
+ * @param locked whether the allocated area is locked and can't be kicked out
+ * @param save callback for when the area is evicted from memory
+ * @param privdata private data for the save callback.
+ *
+ * Allocates offscreen memory from the device associated with pScreen.  size
+ * and align deteremine where and how large the allocated area is, and locked
+ * will mark whether it should be held in card memory.  privdata may be any
+ * pointer for the save callback when the area is removed.
+ *
+ * Note that locked areas do get evicted on VT switch unless the driver
+ * requested version 2.1 or newer behavior.  In that case, the save callback is
+ * still called.
+ */
+ExaOffscreenArea *
+exaOffscreenAlloc (ScreenPtr pScreen, int size, int align,
+                   Bool locked,
+                   ExaOffscreenSaveProc save,
+                   pointer privData)
+{
+    ExaOffscreenArea *area;
+    ExaScreenPriv (pScreen);
+    int real_size = 0, largest_avail = 0;
+#if DEBUG_OFFSCREEN
+    static int number = 0;
+    ErrorF("================= ============ allocating a new pixmap %d\n", ++number);
+#endif
+
+    ExaOffscreenValidate (pScreen);
+    if (!align)
+	align = 1;
+
+    if (!size)
+    {
+	DBG_OFFSCREEN (("Alloc 0x%x -> EMPTY\n", size));
+	return NULL;
+    }
+
+    /* throw out requests that cannot fit */
+    if (size > (pExaScr->info->memorySize - pExaScr->info->offScreenBase))
+    {
+	DBG_OFFSCREEN (("Alloc 0x%x vs (0x%lx) -> TOBIG\n", size,
+			pExaScr->info->memorySize -
+			pExaScr->info->offScreenBase));
+	return NULL;
+    }
+
+    /* Try to find a free space that'll fit. */
+    for (area = pExaScr->info->offScreenAreas; area; area = area->next)
+    {
+	/* skip allocated areas */
+	if (area->state != ExaOffscreenAvail)
+	    continue;
+
+	/* adjust size to match alignment requirement */
+	real_size = size + (area->base_offset + area->size - size) % align;
+
+	/* does it fit? */
+	if (real_size <= area->size)
+	    break;
+
+	if (area->size > largest_avail)
+	    largest_avail = area->size;
+    }
+
+    if (!area)
+    {
+	area = exaFindAreaToEvict(pExaScr, size, align);
+
+	if (!area)
+	{
+	    DBG_OFFSCREEN (("Alloc 0x%x -> NOSPACE\n", size));
+	    /* Could not allocate memory */
+	    ExaOffscreenValidate (pScreen);
+	    return NULL;
+	}
+
+	/* adjust size needed to account for alignment loss for this area */
+	real_size = size + (area->base_offset + area->size - size) % align;
+
+	/*
+	 * Kick out first area if in use
+	 */
+	if (area->state != ExaOffscreenAvail)
+	    area = ExaOffscreenKickOut (pScreen, area);
+	/*
+	 * Now get the system to merge the other needed areas together
+	 */
+	while (area->size < real_size)
+	{
+	    assert (area->next && area->next->state == ExaOffscreenRemovable);
+	    (void) ExaOffscreenKickOut (pScreen, area->next);
+	}
+    }
+
+    /* save extra space in new area */
+    if (real_size < area->size)
+    {
+	ExaOffscreenArea   *new_area = malloc(sizeof (ExaOffscreenArea));
+	if (!new_area)
+	    return NULL;
+	new_area->base_offset = area->base_offset;
+
+	new_area->offset = new_area->base_offset;
+	new_area->align = 0;
+	new_area->size = area->size - real_size;
+	new_area->state = ExaOffscreenAvail;
+	new_area->save = NULL;
+	new_area->last_use = 0;
+	new_area->eviction_cost = 0;
+	new_area->next = area;
+	new_area->prev = area->prev;
+	if (area->prev->next)
+	    area->prev->next = new_area;
+	else
+	    pExaScr->info->offScreenAreas = new_area;
+	area->prev = new_area;
+	area->base_offset = new_area->base_offset + new_area->size;
+	area->size = real_size;
+    } else
+	pExaScr->numOffscreenAvailable--;
+
+    /*
+     * Mark this area as in use
+     */
+    if (locked)
+	area->state = ExaOffscreenLocked;
+    else
+	area->state = ExaOffscreenRemovable;
+    area->privData = privData;
+    area->save = save;
+    area->last_use = pExaScr->offScreenCounter++;
+    area->offset = (area->base_offset + align - 1);
+    area->offset -= area->offset % align;
+    area->align = align;
+
+    ExaOffscreenValidate (pScreen);
+
+    DBG_OFFSCREEN (("Alloc 0x%x -> 0x%x (0x%x)\n", size,
+		    area->base_offset, area->offset));
+    return area;
+}
+
+/**
+ * Ejects all offscreen areas, and uninitializes the offscreen memory manager.
+ */
+void
+ExaOffscreenSwapOut (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+
+    ExaOffscreenValidate (pScreen);
+    /* loop until a single free area spans the space */
+    for (;;)
+    {
+	ExaOffscreenArea *area = pExaScr->info->offScreenAreas;
+
+	if (!area)
+	    break;
+	if (area->state == ExaOffscreenAvail)
+	{
+	    area = area->next;
+	    if (!area)
+		break;
+	}
+	assert (area->state != ExaOffscreenAvail);
+	(void) ExaOffscreenKickOut (pScreen, area);
+	ExaOffscreenValidate (pScreen);
+    }
+    ExaOffscreenValidate (pScreen);
+    ExaOffscreenFini (pScreen);
+}
+
+/** Ejects all pixmaps managed by EXA. */
+static void
+ExaOffscreenEjectPixmaps (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+
+    ExaOffscreenValidate (pScreen);
+    /* loop until a single free area spans the space */
+    for (;;)
+    {
+	ExaOffscreenArea *area;
+
+	for (area = pExaScr->info->offScreenAreas; area != NULL;
+	     area = area->next)
+	{
+	    if (area->state == ExaOffscreenRemovable &&
+		area->save == exaPixmapSave)
+	    {
+		(void) ExaOffscreenKickOut (pScreen, area);
+		ExaOffscreenValidate (pScreen);
+		break;
+	    }
+	}
+	if (area == NULL)
+	    break;
+    }
+    ExaOffscreenValidate (pScreen);
+}
+
+void
+ExaOffscreenSwapIn (ScreenPtr pScreen)
+{
+    exaOffscreenInit (pScreen);
+}
+
+/**
+ * Prepares EXA for disabling of FB access, or restoring it.
+ *
+ * In version 2.1, the disabling results in pixmaps being ejected, while other
+ * allocations remain.  With this plus the prevention of migration while
+ * swappedOut is set, EXA by itself should not cause any access of the
+ * framebuffer to occur while swapped out.  Any remaining issues are the
+ * responsibility of the driver.
+ *
+ * Prior to version 2.1, all allocations, including locked ones, are ejected
+ * when access is disabled, and the allocator is torn down while swappedOut
+ * is set.  This is more drastic, and caused implementation difficulties for
+ * many drivers that could otherwise handle the lack of FB access while
+ * swapped out.
+ */
+void
+exaEnableDisableFBAccess (int index, Bool enable)
+{
+    ScreenPtr pScreen = screenInfo.screens[index];
+    ExaScreenPriv (pScreen);
+
+    if (pExaScr->info->flags & EXA_HANDLES_PIXMAPS)
+	return;
+
+    if (!enable && pExaScr->disableFbCount++ == 0) {
+	if (pExaScr->info->exa_minor < 1)
+	    ExaOffscreenSwapOut (pScreen);
+	else
+	    ExaOffscreenEjectPixmaps (pScreen);
+	pExaScr->swappedOut = TRUE;
+    }
+    
+    if (enable && --pExaScr->disableFbCount == 0) {
+	if (pExaScr->info->exa_minor < 1)
+	    ExaOffscreenSwapIn (pScreen);
+	pExaScr->swappedOut = FALSE;
+    }
+}
+
+/* merge the next free area into this one */
+static void
+ExaOffscreenMerge (ExaScreenPrivPtr pExaScr, ExaOffscreenArea *area)
+{
+    ExaOffscreenArea	*next = area->next;
+
+    /* account for space */
+    area->size += next->size;
+    /* frob pointer */
+    area->next = next->next;
+    if (area->next)
+	area->next->prev = area;
+    else
+	pExaScr->info->offScreenAreas->prev = area;
+    free(next);
+
+    pExaScr->numOffscreenAvailable--;
+}
+
+/**
+ * exaOffscreenFree frees an allocation.
+ *
+ * @param pScreen current screen
+ * @param area offscreen area to free
+ *
+ * exaOffscreenFree frees an allocation created by exaOffscreenAlloc.  Note that
+ * the save callback of the area is not called, and it is up to the driver to
+ * do any cleanup necessary as a result.
+ *
+ * @return pointer to the newly freed area. This behavior should not be relied
+ * on.
+ */
+ExaOffscreenArea *
+exaOffscreenFree (ScreenPtr pScreen, ExaOffscreenArea *area)
+{
+    ExaScreenPriv(pScreen);
+    ExaOffscreenArea	*next = area->next;
+    ExaOffscreenArea	*prev;
+
+    DBG_OFFSCREEN (("Free 0x%x -> 0x%x (0x%x)\n", area->size,
+		    area->base_offset, area->offset));
+    ExaOffscreenValidate (pScreen);
+
+    area->state = ExaOffscreenAvail;
+    area->save = NULL;
+    area->last_use = 0;
+    area->eviction_cost = 0;
+    /*
+     * Find previous area
+     */
+    if (area == pExaScr->info->offScreenAreas)
+	prev = NULL;
+    else
+	prev = area->prev;
+
+    pExaScr->numOffscreenAvailable++;
+
+    /* link with next area if free */
+    if (next && next->state == ExaOffscreenAvail)
+	ExaOffscreenMerge (pExaScr, area);
+
+    /* link with prev area if free */
+    if (prev && prev->state == ExaOffscreenAvail)
+    {
+	area = prev;
+	ExaOffscreenMerge (pExaScr, area);
+    }
+
+    ExaOffscreenValidate (pScreen);
+    DBG_OFFSCREEN(("\tdone freeing\n"));
+    return area;
+}
+
+void
+ExaOffscreenMarkUsed (PixmapPtr pPixmap)
+{
+    ExaPixmapPriv (pPixmap);
+    ExaScreenPriv (pPixmap->drawable.pScreen);
+
+    if (!pExaPixmap || !pExaPixmap->area)
+	return;
+
+    pExaPixmap->area->last_use = pExaScr->offScreenCounter++;
+}
+
+/**
+ * Defragment offscreen memory by compacting allocated areas at the end of it,
+ * leaving the total amount of memory available as a single area at the
+ * beginning (when there are no pinned allocations).
+ */
+_X_HIDDEN ExaOffscreenArea*
+ExaOffscreenDefragment (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+    ExaOffscreenArea *area, *largest_available = NULL;
+    int largest_size = 0;
+    PixmapPtr pDstPix;
+    ExaPixmapPrivPtr pExaDstPix;
+
+    pDstPix = (*pScreen->CreatePixmap) (pScreen, 0, 0, 0, 0);
+
+    if (!pDstPix)
+	return NULL;
+
+    pExaDstPix = ExaGetPixmapPriv (pDstPix);
+    pExaDstPix->use_gpu_copy = TRUE;
+
+    for (area = pExaScr->info->offScreenAreas->prev;
+	 area != pExaScr->info->offScreenAreas;
+	 )
+    {
+	ExaOffscreenArea *prev = area->prev;
+	PixmapPtr pSrcPix;
+	ExaPixmapPrivPtr pExaSrcPix;
+	Bool save_use_gpu_copy;
+	int save_pitch;
+
+	if (area->state != ExaOffscreenAvail ||
+	    prev->state == ExaOffscreenLocked ||
+	    (prev->state == ExaOffscreenRemovable &&
+	     prev->save != exaPixmapSave)) {
+	    area = prev;
+	    continue;
+	}
+
+	if (prev->state == ExaOffscreenAvail) {
+	    if (area == largest_available) {
+		largest_available = prev;
+		largest_size += prev->size;
+	    }
+	    area = prev;
+	    ExaOffscreenMerge (pExaScr, area);
+	    continue;
+	}
+
+	if (area->size > largest_size) {
+	    largest_available = area;
+	    largest_size = area->size;
+	}
+
+	pSrcPix = prev->privData;
+	pExaSrcPix = ExaGetPixmapPriv (pSrcPix);
+
+	pExaDstPix->fb_ptr = pExaScr->info->memoryBase +
+	    area->base_offset + area->size - prev->size + prev->base_offset -
+	    prev->offset;
+	pExaDstPix->fb_ptr -= (unsigned long)pExaDstPix->fb_ptr % prev->align;
+
+	if (pExaDstPix->fb_ptr <= pExaSrcPix->fb_ptr) {
+	    area = prev;
+	    continue;
+	}
+
+	if (!(pExaScr->info->flags & EXA_SUPPORTS_OFFSCREEN_OVERLAPS) &&
+	    (pExaSrcPix->fb_ptr + prev->size) > pExaDstPix->fb_ptr) {
+	    area = prev;
+	    continue;
+	}
+
+	save_use_gpu_copy = pExaSrcPix->use_gpu_copy;
+	save_pitch = pSrcPix->devKind;
+
+	pExaSrcPix->use_gpu_copy = TRUE;
+	pSrcPix->devKind = pExaSrcPix->fb_pitch;
+
+	pDstPix->drawable.width = pSrcPix->drawable.width;
+	pDstPix->devKind = pSrcPix->devKind;
+	pDstPix->drawable.height = pSrcPix->drawable.height;
+	pDstPix->drawable.depth = pSrcPix->drawable.depth;
+	pDstPix->drawable.bitsPerPixel = pSrcPix->drawable.bitsPerPixel;
+
+	if (!pExaScr->info->PrepareCopy (pSrcPix, pDstPix, -1, -1, GXcopy, ~0)) {
+	    pExaSrcPix->use_gpu_copy = save_use_gpu_copy;
+	    pSrcPix->devKind = save_pitch;
+	    area = prev;
+	    continue;
+	}
+
+	pExaScr->info->Copy (pDstPix, 0, 0, 0, 0, pDstPix->drawable.width,
+			     pDstPix->drawable.height);
+	pExaScr->info->DoneCopy (pDstPix);
+	exaMarkSync (pScreen);
+
+	DBG_OFFSCREEN(("Before swap: prev=0x%08x-0x%08x-0x%08x area=0x%08x-0x%08x-0x%08x\n",
+		       prev->base_offset, prev->offset, prev->base_offset + prev->size,
+		       area->base_offset, area->offset, area->base_offset + area->size));
+
+	/* Calculate swapped area offsets and sizes */
+	area->base_offset = prev->base_offset;
+	area->offset = area->base_offset;
+	prev->offset += pExaDstPix->fb_ptr - pExaSrcPix->fb_ptr;
+	assert(prev->offset >= pExaScr->info->offScreenBase &&
+	       prev->offset < pExaScr->info->memorySize);
+	prev->base_offset = prev->offset;
+	if (area->next)
+	    prev->size = area->next->base_offset - prev->base_offset;
+	else
+	    prev->size = pExaScr->info->memorySize - prev->base_offset;
+	area->size = prev->base_offset - area->base_offset;
+
+	DBG_OFFSCREEN(("After swap: area=0x%08x-0x%08x-0x%08x prev=0x%08x-0x%08x-0x%08x\n",
+		       area->base_offset, area->offset, area->base_offset + area->size,
+		       prev->base_offset, prev->offset, prev->base_offset + prev->size));
+
+	/* Swap areas in list */
+	if (area->next)
+	    area->next->prev = prev;
+	else
+	    pExaScr->info->offScreenAreas->prev = prev;
+	if (prev->prev->next)
+	    prev->prev->next = area;
+	else
+	    pExaScr->info->offScreenAreas = area;
+	prev->next = area->next;
+	area->next = prev;
+	area->prev = prev->prev;
+	prev->prev = area;
+	if (!area->prev->next)
+	    pExaScr->info->offScreenAreas = area;
+
+#if DEBUG_OFFSCREEN
+	if (prev->prev == prev || prev->next == prev)
+	    ErrorF("Whoops, prev points to itself!\n");
+
+	if (area->prev == area || area->next == area)
+	    ErrorF("Whoops, area points to itself!\n");
+#endif
+
+	pExaSrcPix->fb_ptr = pExaDstPix->fb_ptr;
+	pExaSrcPix->use_gpu_copy = save_use_gpu_copy;
+	pSrcPix->devKind = save_pitch;
+    }
+
+    pDstPix->drawable.width = 0;
+    pDstPix->drawable.height = 0;
+    pDstPix->drawable.depth = 0;
+    pDstPix->drawable.bitsPerPixel = 0;
+
+    (*pScreen->DestroyPixmap) (pDstPix);
+
+    if (area->state == ExaOffscreenAvail && area->size > largest_size)
+	return area;
+
+    return largest_available;
+}
+
+/**
+ * exaOffscreenInit initializes the offscreen memory manager.
+ *
+ * @param pScreen current screen
+ *
+ * exaOffscreenInit is called by exaDriverInit to set up the memory manager for
+ * the screen, if any offscreen memory is available.
+ */
+Bool
+exaOffscreenInit (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+    ExaOffscreenArea *area;
+
+    /* Allocate a big free area */
+    area = malloc(sizeof (ExaOffscreenArea));
+
+    if (!area)
+	return FALSE;
+
+    area->state = ExaOffscreenAvail;
+    area->base_offset = pExaScr->info->offScreenBase;
+    area->offset = area->base_offset;
+    area->align = 0;
+    area->size = pExaScr->info->memorySize - area->base_offset;
+    area->save = NULL;
+    area->next = NULL;
+    area->prev = area;
+    area->last_use = 0;
+    area->eviction_cost = 0;
+
+    /* Add it to the free areas */
+    pExaScr->info->offScreenAreas = area;
+    pExaScr->offScreenCounter = 1;
+    pExaScr->numOffscreenAvailable = 1;
+
+    ExaOffscreenValidate (pScreen);
+
+    return TRUE;
+}
+
+void
+ExaOffscreenFini (ScreenPtr pScreen)
+{
+    ExaScreenPriv (pScreen);
+    ExaOffscreenArea *area;
+
+    /* just free all of the area records */
+    while ((area = pExaScr->info->offScreenAreas))
+    {
+	pExaScr->info->offScreenAreas = area->next;
+	free(area);
+    }
+}
diff --git a/exa/exa_priv.h b/exa/exa_priv.h
new file mode 100644
index 0000000..e5d90d4
--- /dev/null
+++ b/exa/exa_priv.h
@@ -0,0 +1,725 @@
+/*
+ *
+ * Copyright (C) 2000 Keith Packard, member of The XFree86 Project, Inc.
+ *               2005 Zack Rusin, Trolltech
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifndef EXAPRIV_H
+#define EXAPRIV_H
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "exa.h"
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#ifdef MITSHM
+#include "shmint.h"
+#endif
+#include "scrnintstr.h"
+#include "pixmapstr.h"
+#include "windowstr.h"
+#include "servermd.h"
+#include "mibstore.h"
+#include "colormapst.h"
+#include "gcstruct.h"
+#include "input.h"
+#include "mipointer.h"
+#include "mi.h"
+#include "dix.h"
+#include "fb.h"
+#include "fboverlay.h"
+#include "fbpict.h"
+#include "glyphstr.h"
+#include "damage.h"
+
+#define DEBUG_TRACE_FALL	0
+#define DEBUG_MIGRATE		0
+#define DEBUG_PIXMAP		0
+#define DEBUG_OFFSCREEN		0
+#define DEBUG_GLYPH_CACHE	0
+
+#if DEBUG_TRACE_FALL
+#define EXA_FALLBACK(x)     					\
+do {								\
+	ErrorF("EXA fallback at %s: ", __FUNCTION__);		\
+	ErrorF x;						\
+} while (0)
+
+char
+exaDrawableLocation(DrawablePtr pDrawable);
+#else
+#define EXA_FALLBACK(x)
+#endif
+
+#if DEBUG_PIXMAP
+#define DBG_PIXMAP(a) ErrorF a
+#else
+#define DBG_PIXMAP(a)
+#endif
+
+#ifndef EXA_MAX_FB
+#define EXA_MAX_FB   FB_OVERLAY_MAX
+#endif
+
+#ifdef DEBUG
+#define EXA_FatalErrorDebug(x) FatalError x
+#define EXA_FatalErrorDebugWithRet(x, ret) FatalError x
+#else
+#define EXA_FatalErrorDebug(x) ErrorF x
+#define EXA_FatalErrorDebugWithRet(x, ret) \
+do { \
+    ErrorF x; \
+    return ret; \
+} while (0)
+#endif
+
+/**
+ * This is the list of migration heuristics supported by EXA.  See
+ * exaDoMigration() for what their implementations do.
+ */
+enum ExaMigrationHeuristic {
+    ExaMigrationGreedy,
+    ExaMigrationAlways,
+    ExaMigrationSmart
+};
+
+typedef struct {
+    unsigned char sha1[20];
+} ExaCachedGlyphRec, *ExaCachedGlyphPtr;
+
+typedef struct {
+    /* The identity of the cache, statically configured at initialization */
+    unsigned int format;
+    int glyphWidth;
+    int glyphHeight;
+
+    int size; /* Size of cache; eventually this should be dynamically determined */
+
+    /* Hash table mapping from glyph sha1 to position in the glyph; we use
+     * open addressing with a hash table size determined based on size and large
+     * enough so that we always have a good amount of free space, so we can
+     * use linear probing. (Linear probing is preferrable to double hashing
+     * here because it allows us to easily remove entries.)
+     */
+    int *hashEntries;
+    int hashSize;
+    
+    ExaCachedGlyphPtr glyphs;
+    int glyphCount; /* Current number of glyphs */
+    
+    PicturePtr picture;   /* Where the glyphs of the cache are stored */
+    int yOffset;          /* y location within the picture where the cache starts */
+    int columns;          /* Number of columns the glyphs are layed out in */
+    int evictionPosition; /* Next random position to evict a glyph */
+} ExaGlyphCacheRec, *ExaGlyphCachePtr;
+
+#define EXA_NUM_GLYPH_CACHES 4
+
+#define EXA_FALLBACK_COPYWINDOW (1 << 0)
+#define EXA_ACCEL_COPYWINDOW (1 << 1)
+
+typedef struct _ExaMigrationRec {
+    Bool as_dst;
+    Bool as_src;
+    PixmapPtr pPix;
+    RegionPtr pReg;
+} ExaMigrationRec, *ExaMigrationPtr;
+
+typedef void (*EnableDisableFBAccessProcPtr)(int, Bool);
+typedef struct {
+    ExaDriverPtr info;
+    ScreenBlockHandlerProcPtr	 SavedBlockHandler;
+    ScreenWakeupHandlerProcPtr	 SavedWakeupHandler;
+    CreateGCProcPtr 		 SavedCreateGC;
+    CloseScreenProcPtr 		 SavedCloseScreen;
+    GetImageProcPtr 		 SavedGetImage;
+    GetSpansProcPtr 		 SavedGetSpans;
+    CreatePixmapProcPtr 	 SavedCreatePixmap;
+    DestroyPixmapProcPtr 	 SavedDestroyPixmap;
+    CopyWindowProcPtr 		 SavedCopyWindow;
+    ChangeWindowAttributesProcPtr SavedChangeWindowAttributes;
+    BitmapToRegionProcPtr        SavedBitmapToRegion;
+    CreateScreenResourcesProcPtr SavedCreateScreenResources;
+    ModifyPixmapHeaderProcPtr    SavedModifyPixmapHeader;
+    SourceValidateProcPtr        SavedSourceValidate;
+    CompositeProcPtr             SavedComposite;
+    TrianglesProcPtr		 SavedTriangles;
+    GlyphsProcPtr                SavedGlyphs;
+    TrapezoidsProcPtr            SavedTrapezoids;
+    AddTrapsProcPtr		 SavedAddTraps;
+    void (*do_migration) (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel);
+    Bool (*pixmap_has_gpu_copy) (PixmapPtr pPixmap);
+    void (*do_move_in_pixmap) (PixmapPtr pPixmap);
+    void (*do_move_out_pixmap) (PixmapPtr pPixmap);
+    void (*prepare_access_reg)(PixmapPtr pPixmap, int index, RegionPtr pReg);
+
+    Bool			 swappedOut;
+    enum ExaMigrationHeuristic	 migration;
+    Bool			 checkDirtyCorrectness;
+    unsigned			 disableFbCount;
+    Bool			 optimize_migration;
+    unsigned			 offScreenCounter;
+    unsigned			 numOffscreenAvailable;
+    CARD32			 lastDefragment;
+    CARD32			 nextDefragment;
+    PixmapPtr			 deferred_mixed_pixmap;
+
+    /* Reference counting for accessed pixmaps */
+    struct {
+	PixmapPtr pixmap;
+	int count;
+	Bool retval;
+    } access[EXA_NUM_PREPARE_INDICES];
+
+    /* Holds information on fallbacks that cannot be relayed otherwise. */
+    unsigned int fallback_flags;
+    unsigned int fallback_counter;
+
+    ExaGlyphCacheRec             glyphCaches[EXA_NUM_GLYPH_CACHES];
+
+    /**
+     * Regions affected by fallback composite source / mask operations.
+     */
+
+    RegionRec srcReg;
+    RegionRec maskReg;
+    PixmapPtr srcPix;
+
+} ExaScreenPrivRec, *ExaScreenPrivPtr;
+
+/*
+ * This is the only completely portable way to
+ * compute this info.
+ */
+#ifndef BitsPerPixel
+#define BitsPerPixel(d) (\
+    PixmapWidthPaddingInfo[d].notPower2 ? \
+    (PixmapWidthPaddingInfo[d].bytesPerPixel * 8) : \
+    ((1 << PixmapWidthPaddingInfo[d].padBytesLog2) * 8 / \
+    (PixmapWidthPaddingInfo[d].padRoundUp+1)))
+#endif
+
+extern DevPrivateKeyRec exaScreenPrivateKeyRec;
+#define exaScreenPrivateKey (&exaScreenPrivateKeyRec)
+extern DevPrivateKeyRec exaPixmapPrivateKeyRec;
+#define exaPixmapPrivateKey (&exaPixmapPrivateKeyRec)
+extern DevPrivateKeyRec exaGCPrivateKeyRec;
+#define exaGCPrivateKey (&exaGCPrivateKeyRec)
+
+#define ExaGetScreenPriv(s) ((ExaScreenPrivPtr)dixLookupPrivate(&(s)->devPrivates, exaScreenPrivateKey))
+#define ExaScreenPriv(s)	ExaScreenPrivPtr    pExaScr = ExaGetScreenPriv(s)
+
+#define ExaGetGCPriv(gc) ((ExaGCPrivPtr)dixLookupPrivate(&(gc)->devPrivates, exaGCPrivateKey))
+#define ExaGCPriv(gc) ExaGCPrivPtr pExaGC = ExaGetGCPriv(gc)
+
+/*
+ * Some macros to deal with function wrapping.
+ */
+#define wrap(priv, real, mem, func) {\
+    priv->Saved##mem = real->mem; \
+    real->mem = func; \
+}
+
+#define unwrap(priv, real, mem) {\
+    real->mem = priv->Saved##mem; \
+}
+
+#define swap(priv, real, mem) {\
+    void *tmp = priv->Saved##mem; \
+    priv->Saved##mem = real->mem; \
+    real->mem = tmp; \
+}
+
+#define EXA_PRE_FALLBACK(_screen_) \
+    ExaScreenPriv(_screen_); \
+    pExaScr->fallback_counter++;
+
+#define EXA_POST_FALLBACK(_screen_) \
+    pExaScr->fallback_counter--;
+
+#define EXA_PRE_FALLBACK_GC(_gc_) \
+    ExaScreenPriv(_gc_->pScreen); \
+    ExaGCPriv(_gc_); \
+    pExaScr->fallback_counter++; \
+    swap(pExaGC, _gc_, ops);
+
+#define EXA_POST_FALLBACK_GC(_gc_) \
+    pExaScr->fallback_counter--; \
+    swap(pExaGC, _gc_, ops);
+
+/** Align an offset to an arbitrary alignment */
+#define EXA_ALIGN(offset, align) (((offset) + (align) - 1) - \
+	(((offset) + (align) - 1) % (align)))
+/** Align an offset to a power-of-two alignment */
+#define EXA_ALIGN2(offset, align) (((offset) + (align) - 1) & ~((align) - 1))
+
+#define EXA_PIXMAP_SCORE_MOVE_IN    10
+#define EXA_PIXMAP_SCORE_MAX	    20
+#define EXA_PIXMAP_SCORE_MOVE_OUT   -10
+#define EXA_PIXMAP_SCORE_MIN	    -20
+#define EXA_PIXMAP_SCORE_PINNED	    1000
+#define EXA_PIXMAP_SCORE_INIT	    1001
+
+#define ExaGetPixmapPriv(p) ((ExaPixmapPrivPtr)dixLookupPrivate(&(p)->devPrivates, exaPixmapPrivateKey))
+#define ExaSetPixmapPriv(p,a) dixSetPrivate(&(p)->devPrivates, exaPixmapPrivateKey, a)
+#define ExaPixmapPriv(p)	ExaPixmapPrivPtr pExaPixmap = ExaGetPixmapPriv(p)
+
+#define EXA_RANGE_PITCH (1 << 0)
+#define EXA_RANGE_WIDTH (1 << 1)
+#define EXA_RANGE_HEIGHT (1 << 2)
+
+typedef struct {
+    ExaOffscreenArea *area;
+    int		    score;	/**< score for the move-in vs move-out heuristic */
+    Bool	    use_gpu_copy;
+
+    CARD8	    *sys_ptr;	/**< pointer to pixmap data in system memory */
+    int		    sys_pitch;	/**< pitch of pixmap in system memory */
+
+    CARD8	    *fb_ptr;	/**< pointer to pixmap data in framebuffer memory */
+    int		    fb_pitch;	/**< pitch of pixmap in framebuffer memory */
+    unsigned int    fb_size;	/**< size of pixmap in framebuffer memory */
+
+    /**
+     * Holds information about whether this pixmap can be used for
+     * acceleration (== 0) or not (> 0).
+     *
+     * Contains a OR'ed combination of the following values:
+     * EXA_RANGE_PITCH - set if the pixmap's pitch is out of range
+     * EXA_RANGE_WIDTH - set if the pixmap's width is out of range
+     * EXA_RANGE_HEIGHT - set if the pixmap's height is out of range
+     */
+    unsigned int    accel_blocked;
+
+    /**
+     * The damage record contains the areas of the pixmap's current location
+     * (framebuffer or system) that have been damaged compared to the other
+     * location.
+     */
+    DamagePtr	    pDamage;
+    /**
+     * The valid regions mark the valid bits (at least, as they're derived from
+     * damage, which may be overreported) of a pixmap's system and FB copies.
+     */
+    RegionRec	    validSys, validFB;
+    /**
+     * Driver private storage per EXA pixmap
+     */
+    void *driverPriv;
+} ExaPixmapPrivRec, *ExaPixmapPrivPtr;
+
+typedef struct {
+    /* GC values from the layer below. */
+    GCOps *Savedops;
+    GCFuncs *Savedfuncs;
+} ExaGCPrivRec, *ExaGCPrivPtr;
+
+typedef struct {
+    PicturePtr pDst;
+    INT16 xSrc;
+    INT16 ySrc;
+    INT16 xMask;
+    INT16 yMask;
+    INT16 xDst;
+    INT16 yDst;
+    INT16 width;
+    INT16 height;
+} ExaCompositeRectRec, *ExaCompositeRectPtr;
+
+/**
+ * exaDDXDriverInit must be implemented by the DDX using EXA, and is the place
+ * to set EXA options or hook in screen functions to handle using EXA as the AA.
+  */
+void exaDDXDriverInit (ScreenPtr pScreen);
+
+/* exa_unaccel.c */
+void
+exaPrepareAccessGC(GCPtr pGC);
+
+void
+exaFinishAccessGC(GCPtr pGC);
+
+void
+ExaCheckFillSpans  (DrawablePtr pDrawable, GCPtr pGC, int nspans,
+		   DDXPointPtr ppt, int *pwidth, int fSorted);
+
+void
+ExaCheckSetSpans (DrawablePtr pDrawable, GCPtr pGC, char *psrc,
+		 DDXPointPtr ppt, int *pwidth, int nspans, int fSorted);
+
+void
+ExaCheckPutImage (DrawablePtr pDrawable, GCPtr pGC, int depth,
+		 int x, int y, int w, int h, int leftPad, int format,
+		 char *bits);
+
+void
+ExaCheckCopyNtoN (DrawablePtr pSrc, DrawablePtr pDst,  GCPtr pGC,
+	     BoxPtr	pbox, int nbox, int dx, int dy, Bool	reverse, 
+	     Bool upsidedown, Pixel bitplane, void *closure);
+
+RegionPtr
+ExaCheckCopyArea (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
+		 int srcx, int srcy, int w, int h, int dstx, int dsty);
+
+RegionPtr
+ExaCheckCopyPlane (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
+		  int srcx, int srcy, int w, int h, int dstx, int dsty,
+		  unsigned long bitPlane);
+
+void
+ExaCheckPolyPoint (DrawablePtr pDrawable, GCPtr pGC, int mode, int npt,
+		  DDXPointPtr pptInit);
+
+void
+ExaCheckPolylines (DrawablePtr pDrawable, GCPtr pGC,
+		  int mode, int npt, DDXPointPtr ppt);
+
+void
+ExaCheckPolySegment (DrawablePtr pDrawable, GCPtr pGC,
+		    int nsegInit, xSegment *pSegInit);
+
+void
+ExaCheckPolyArc (DrawablePtr pDrawable, GCPtr pGC,
+		int narcs, xArc *pArcs);
+
+void
+ExaCheckPolyFillRect (DrawablePtr pDrawable, GCPtr pGC,
+		     int nrect, xRectangle *prect);
+
+void
+ExaCheckImageGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
+		      int x, int y, unsigned int nglyph,
+		      CharInfoPtr *ppci, pointer pglyphBase);
+
+void
+ExaCheckPolyGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
+		     int x, int y, unsigned int nglyph,
+		     CharInfoPtr *ppci, pointer pglyphBase);
+
+void
+ExaCheckPushPixels (GCPtr pGC, PixmapPtr pBitmap,
+		   DrawablePtr pDrawable,
+		   int w, int h, int x, int y);
+
+void
+ExaCheckCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc);
+
+void
+ExaCheckGetImage(DrawablePtr pDrawable, int x, int y, int w, int h,
+		unsigned int format, unsigned long planeMask, char *d);
+
+void
+ExaCheckGetSpans (DrawablePtr pDrawable,
+		 int wMax,
+		 DDXPointPtr ppt,
+		 int *pwidth,
+		 int nspans,
+		 char *pdstStart);
+
+void
+ExaCheckAddTraps (PicturePtr	pPicture,
+		  INT16		x_off,
+		  INT16		y_off,
+		  int		ntrap,
+		  xTrap		*traps);
+
+/* exa_accel.c */
+
+static _X_INLINE Bool
+exaGCReadsDestination(DrawablePtr pDrawable, unsigned long planemask,
+		      unsigned int fillStyle, unsigned char alu,
+		      unsigned int clientClipType)
+{
+    return ((alu != GXcopy && alu != GXclear && alu != GXset &&
+	     alu != GXcopyInverted) || fillStyle == FillStippled ||
+	    clientClipType != CT_NONE || !EXA_PM_IS_SOLID(pDrawable, planemask));
+}
+
+void
+exaCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc);
+
+Bool
+exaFillRegionTiled (DrawablePtr	pDrawable, RegionPtr pRegion, PixmapPtr pTile,
+		    DDXPointPtr pPatOrg, CARD32 planemask, CARD32 alu,
+		    unsigned int clientClipType);
+
+void
+exaGetImage (DrawablePtr pDrawable, int x, int y, int w, int h,
+	     unsigned int format, unsigned long planeMask, char *d);
+
+RegionPtr
+exaCopyArea(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable, GCPtr pGC,
+	    int srcx, int srcy, int width, int height, int dstx, int dsty);
+
+Bool
+exaHWCopyNtoN (DrawablePtr    pSrcDrawable,
+	     DrawablePtr    pDstDrawable,
+	     GCPtr	    pGC,
+	     BoxPtr	    pbox,
+	     int	    nbox,
+	     int	    dx,
+	     int	    dy,
+	     Bool	    reverse,
+	     Bool	    upsidedown);
+
+void
+exaCopyNtoN (DrawablePtr    pSrcDrawable,
+	     DrawablePtr    pDstDrawable,
+	     GCPtr	    pGC,
+	     BoxPtr	    pbox,
+	     int	    nbox,
+	     int	    dx,
+	     int	    dy,
+	     Bool	    reverse,
+	     Bool	    upsidedown,
+	     Pixel	    bitplane,
+	     void	    *closure);
+
+extern const GCOps exaOps;
+
+void
+ExaCheckComposite (CARD8      op,
+		  PicturePtr pSrc,
+		  PicturePtr pMask,
+		  PicturePtr pDst,
+		  INT16      xSrc,
+		  INT16      ySrc,
+		  INT16      xMask,
+		  INT16      yMask,
+		  INT16      xDst,
+		  INT16      yDst,
+		  CARD16     width,
+		  CARD16     height);
+
+void
+ExaCheckGlyphs (CARD8	      op,
+		PicturePtr    pSrc,
+		PicturePtr    pDst,
+		PictFormatPtr maskFormat,
+		INT16	      xSrc,
+		INT16	      ySrc,
+		int	      nlist,
+		GlyphListPtr  list,
+		GlyphPtr      *glyphs);
+
+/* exa_offscreen.c */
+void
+ExaOffscreenSwapOut (ScreenPtr pScreen);
+
+void
+ExaOffscreenSwapIn (ScreenPtr pScreen);
+
+ExaOffscreenArea*
+ExaOffscreenDefragment (ScreenPtr pScreen);
+
+Bool
+exaOffscreenInit(ScreenPtr pScreen);
+
+void
+ExaOffscreenFini (ScreenPtr pScreen);
+
+/* exa.c */
+Bool
+ExaDoPrepareAccess(PixmapPtr pPixmap, int index);
+
+void
+exaPrepareAccess(DrawablePtr pDrawable, int index);
+
+void
+exaFinishAccess(DrawablePtr pDrawable, int index);
+
+void
+exaDestroyPixmap(PixmapPtr pPixmap);
+
+void
+exaPixmapDirty(PixmapPtr pPix, int x1, int y1, int x2, int y2);
+
+void
+exaGetDrawableDeltas (DrawablePtr pDrawable, PixmapPtr pPixmap,
+		      int *xp, int *yp);
+
+Bool
+exaPixmapHasGpuCopy(PixmapPtr p);
+
+PixmapPtr
+exaGetOffscreenPixmap (DrawablePtr pDrawable, int *xp, int *yp);
+
+PixmapPtr
+exaGetDrawablePixmap(DrawablePtr pDrawable);
+
+void
+exaSetFbPitch(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
+              int w, int h, int bpp);
+
+void
+exaSetAccelBlock(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
+                 int w, int h, int bpp);
+
+void
+exaDoMigration (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel);
+
+Bool
+exaPixmapIsPinned (PixmapPtr pPix);
+
+extern const GCFuncs exaGCFuncs;
+
+/* exa_classic.c */
+PixmapPtr
+exaCreatePixmap_classic(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint);
+
+Bool
+exaModifyPixmapHeader_classic(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData);
+
+Bool
+exaDestroyPixmap_classic (PixmapPtr pPixmap);
+
+Bool
+exaPixmapHasGpuCopy_classic(PixmapPtr pPixmap);
+
+/* exa_driver.c */
+PixmapPtr
+exaCreatePixmap_driver(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint);
+
+Bool
+exaModifyPixmapHeader_driver(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData);
+
+Bool
+exaDestroyPixmap_driver (PixmapPtr pPixmap);
+
+Bool
+exaPixmapHasGpuCopy_driver(PixmapPtr pPixmap);
+
+/* exa_mixed.c */
+PixmapPtr
+exaCreatePixmap_mixed(ScreenPtr pScreen, int w, int h, int depth,
+		unsigned usage_hint);
+
+Bool
+exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
+		      int bitsPerPixel, int devKind, pointer pPixData);
+
+Bool
+exaDestroyPixmap_mixed(PixmapPtr pPixmap);
+
+Bool
+exaPixmapHasGpuCopy_mixed(PixmapPtr pPixmap);
+
+/* exa_migration_mixed.c */
+void
+exaCreateDriverPixmap_mixed(PixmapPtr pPixmap);
+
+void
+exaDoMigration_mixed(ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel);
+
+void
+exaMoveInPixmap_mixed(PixmapPtr pPixmap);
+
+void
+exaDamageReport_mixed(DamagePtr pDamage, RegionPtr pRegion, void *closure);
+
+void
+exaPrepareAccessReg_mixed(PixmapPtr pPixmap, int index, RegionPtr pReg);
+
+/* exa_render.c */
+Bool
+exaOpReadsDestination (CARD8 op);
+
+void
+exaComposite(CARD8	op,
+	     PicturePtr pSrc,
+	     PicturePtr pMask,
+	     PicturePtr pDst,
+	     INT16	xSrc,
+	     INT16	ySrc,
+	     INT16	xMask,
+	     INT16	yMask,
+	     INT16	xDst,
+	     INT16	yDst,
+	     CARD16	width,
+	     CARD16	height);
+
+void
+exaCompositeRects(CARD8	              op,
+		  PicturePtr	      Src,
+		  PicturePtr	      pMask,
+		  PicturePtr	      pDst,
+		  int                 nrect,
+		  ExaCompositeRectPtr rects);
+
+void
+exaTrapezoids (CARD8 op, PicturePtr pSrc, PicturePtr pDst,
+               PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
+               int ntrap, xTrapezoid *traps);
+
+void
+exaTriangles (CARD8 op, PicturePtr pSrc, PicturePtr pDst,
+	      PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
+	      int ntri, xTriangle *tris);
+
+/* exa_glyph.c */
+void
+exaGlyphsInit(ScreenPtr pScreen);
+
+void
+exaGlyphsFini (ScreenPtr pScreen);
+
+void
+exaGlyphs (CARD8	op,
+	  PicturePtr	pSrc,
+	  PicturePtr	pDst,
+	  PictFormatPtr	maskFormat,
+	  INT16		xSrc,
+	  INT16		ySrc,
+	  int		nlist,
+	  GlyphListPtr	list,
+	  GlyphPtr	*glyphs);
+
+/* exa_migration_classic.c */
+void
+exaCopyDirtyToSys (ExaMigrationPtr migrate);
+
+void
+exaCopyDirtyToFb (ExaMigrationPtr migrate);
+
+void
+exaDoMigration_classic (ExaMigrationPtr pixmaps, int npixmaps, Bool can_accel);
+
+void
+exaPixmapSave (ScreenPtr pScreen, ExaOffscreenArea *area);
+
+void
+exaMoveOutPixmap_classic (PixmapPtr pPixmap);
+
+void
+exaMoveInPixmap_classic (PixmapPtr pPixmap);
+
+void
+exaPrepareAccessReg_classic(PixmapPtr pPixmap, int index, RegionPtr pReg);
+
+#endif /* EXAPRIV_H */
diff --git a/exa/exa_render.c b/exa/exa_render.c
new file mode 100644
index 0000000..6f2af8a
--- /dev/null
+++ b/exa/exa_render.c
@@ -0,0 +1,1256 @@
+/*
+ * Copyright © 2001 Keith Packard
+ *
+ * Partly based on code that is Copyright © The XFree86 Project Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "exa_priv.h"
+
+#include "mipict.h"
+
+#if DEBUG_TRACE_FALL
+static void exaCompositeFallbackPictDesc(PicturePtr pict, char *string, int n)
+{
+    char format[20];
+    char size[20];
+    char loc;
+    int temp;
+
+    if (!pict) {
+	snprintf(string, n, "None");
+	return;
+    }
+
+    switch (pict->format)
+    {
+    case PICT_a8r8g8b8:
+	snprintf(format, 20, "ARGB8888");
+	break;
+    case PICT_x8r8g8b8:
+	snprintf(format, 20, "XRGB8888");
+	break;
+    case PICT_b8g8r8a8:
+	snprintf(format, 20, "BGRA8888");
+	break;
+    case PICT_b8g8r8x8:
+	snprintf(format, 20, "BGRX8888");
+	break;
+    case PICT_r5g6b5:
+	snprintf(format, 20, "RGB565  ");
+	break;
+    case PICT_x1r5g5b5:
+	snprintf(format, 20, "RGB555  ");
+	break;
+    case PICT_a8:
+	snprintf(format, 20, "A8      ");
+	break;
+    case PICT_a1:
+	snprintf(format, 20, "A1      ");
+	break;
+    default:
+	snprintf(format, 20, "0x%x", (int)pict->format);
+	break;
+    }
+
+    if (pict->pDrawable) {
+	loc = exaGetOffscreenPixmap(pict->pDrawable, &temp, &temp) ? 's' : 'm';
+
+	snprintf(size, 20, "%dx%d%s", pict->pDrawable->width,
+		 pict->pDrawable->height, pict->repeat ?
+		 " R" : "");
+    } else {
+	loc = '-';
+
+	snprintf(size, 20, "%s", pict->repeat ? " R" : "");
+    }
+
+    snprintf(string, n, "%p:%c fmt %s (%s)", pict->pDrawable, loc, format, size);
+}
+
+static void
+exaPrintCompositeFallback(CARD8 op,
+			  PicturePtr pSrc,
+			  PicturePtr pMask,
+			  PicturePtr pDst)
+{
+    char sop[20];
+    char srcdesc[40], maskdesc[40], dstdesc[40];
+
+    switch(op)
+    {
+    case PictOpSrc:
+	sprintf(sop, "Src");
+	break;
+    case PictOpOver:
+	sprintf(sop, "Over");
+	break;
+    default:
+	sprintf(sop, "0x%x", (int)op);
+	break;
+    }
+
+    exaCompositeFallbackPictDesc(pSrc, srcdesc, 40);
+    exaCompositeFallbackPictDesc(pMask, maskdesc, 40);
+    exaCompositeFallbackPictDesc(pDst, dstdesc, 40);
+
+    ErrorF("Composite fallback: op %s, \n"
+	   "                    src  %s, \n"
+	   "                    mask %s, \n"
+	   "                    dst  %s, \n",
+	   sop, srcdesc, maskdesc, dstdesc);
+}
+#endif /* DEBUG_TRACE_FALL */
+
+Bool
+exaOpReadsDestination (CARD8 op)
+{
+    /* FALSE (does not read destination) is the list of ops in the protocol
+     * document with "0" in the "Fb" column and no "Ab" in the "Fa" column.
+     * That's just Clear and Src.  ReduceCompositeOp() will already have
+     * converted con/disjoint clear/src to Clear or Src.
+     */
+    switch (op) {
+    case PictOpClear:
+    case PictOpSrc:
+	return FALSE;
+    default:
+	return TRUE;
+    }
+}
+
+
+static Bool
+exaGetPixelFromRGBA(CARD32	*pixel,
+		    CARD16	red,
+		    CARD16	green,
+		    CARD16	blue,
+		    CARD16	alpha,
+		    PictFormatPtr pFormat)
+{
+    int rbits, bbits, gbits, abits;
+    int rshift, bshift, gshift, ashift;
+
+    *pixel = 0;
+
+    if (!PICT_FORMAT_COLOR(pFormat->format) &&
+	PICT_FORMAT_TYPE(pFormat->format) != PICT_TYPE_A)
+	return FALSE;
+
+    rbits = PICT_FORMAT_R(pFormat->format);
+    gbits = PICT_FORMAT_G(pFormat->format);
+    bbits = PICT_FORMAT_B(pFormat->format);
+    abits = PICT_FORMAT_A(pFormat->format);
+
+    rshift = pFormat->direct.red;
+    gshift = pFormat->direct.green;
+    bshift = pFormat->direct.blue;
+    ashift = pFormat->direct.alpha;
+
+    *pixel |=  ( blue >> (16 - bbits)) << bshift;
+    *pixel |=  (  red >> (16 - rbits)) << rshift;
+    *pixel |=  (green >> (16 - gbits)) << gshift;
+    *pixel |=  (alpha >> (16 - abits)) << ashift;
+
+    return TRUE;
+}
+
+static Bool
+exaGetRGBAFromPixel(CARD32	pixel,
+		    CARD16	*red,
+		    CARD16	*green,
+		    CARD16	*blue,
+		    CARD16	*alpha,
+		    PictFormatPtr pFormat,
+		    PictFormatShort format)
+{
+    int rbits, bbits, gbits, abits;
+    int rshift, bshift, gshift, ashift;
+
+    if (!PICT_FORMAT_COLOR(format) && PICT_FORMAT_TYPE(format) != PICT_TYPE_A)
+	return FALSE;
+
+    rbits = PICT_FORMAT_R(format);
+    gbits = PICT_FORMAT_G(format);
+    bbits = PICT_FORMAT_B(format);
+    abits = PICT_FORMAT_A(format);
+
+    if (pFormat) {
+	rshift = pFormat->direct.red;
+	gshift = pFormat->direct.green;
+	bshift = pFormat->direct.blue;
+	ashift = pFormat->direct.alpha;
+    } else if (format == PICT_a8r8g8b8) {
+	rshift = 16;
+	gshift = 8;
+	bshift = 0;
+	ashift = 24;
+    } else
+	FatalError("EXA bug: exaGetRGBAFromPixel() doesn't match "
+		   "createSourcePicture()\n");
+
+    if (rbits) {
+	*red = ((pixel >> rshift ) & ((1 << rbits) - 1)) << (16 - rbits);
+	while (rbits < 16) {
+	    *red |= *red >> rbits;
+	    rbits <<= 1;
+	}
+
+	*green = ((pixel >> gshift ) & ((1 << gbits) - 1)) << (16 - gbits);
+	while (gbits < 16) {
+	    *green |= *green >> gbits;
+	    gbits <<= 1;
+	}
+
+	*blue = ((pixel >> bshift ) & ((1 << bbits) - 1)) << (16 - bbits);
+	while (bbits < 16) {
+	    *blue |= *blue >> bbits;
+	    bbits <<= 1;
+	}
+    } else {
+	*red = 0x0000;
+	*green = 0x0000;
+	*blue = 0x0000;
+    }
+
+    if (abits) {
+	*alpha = ((pixel >> ashift ) & ((1 << abits) - 1)) << (16 - abits);
+	while (abits < 16) {
+	    *alpha |= *alpha >> abits;
+	    abits <<= 1;
+	}
+    } else
+	*alpha = 0xffff;
+
+    return TRUE;
+}
+
+static int
+exaTryDriverSolidFill(PicturePtr	pSrc,
+		      PicturePtr	pDst,
+		      INT16		xSrc,
+		      INT16		ySrc,
+		      INT16		xDst,
+		      INT16		yDst,
+		      CARD16		width,
+		      CARD16		height)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+    RegionRec region;
+    BoxPtr pbox;
+    int nbox;
+    int dst_off_x, dst_off_y;
+    PixmapPtr pSrcPix, pDstPix;
+    ExaPixmapPrivPtr pDstExaPix;
+    CARD32 pixel;
+    CARD16 red, green, blue, alpha;
+
+    pDstPix = exaGetDrawablePixmap (pDst->pDrawable);
+    pDstExaPix = ExaGetPixmapPriv(pDstPix);
+
+    /* Check whether the accelerator can use the destination pixmap.
+     */
+    if (pDstExaPix->accel_blocked)
+    {
+	return -1;
+    }
+
+    xDst += pDst->pDrawable->x;
+    yDst += pDst->pDrawable->y;
+    if (pSrc->pDrawable) {
+	xSrc += pSrc->pDrawable->x;
+	ySrc += pSrc->pDrawable->y;
+    }
+
+    if (!miComputeCompositeRegion (&region, pSrc, NULL, pDst,
+				   xSrc, ySrc, 0, 0, xDst, yDst,
+				   width, height))
+	return 1;
+
+    exaGetDrawableDeltas (pDst->pDrawable, pDstPix, &dst_off_x, &dst_off_y);
+
+    RegionTranslate(&region, dst_off_x, dst_off_y);
+
+    if (pSrc->pDrawable) {
+	pSrcPix = exaGetDrawablePixmap (pSrc->pDrawable);
+	pixel = exaGetPixmapFirstPixel (pSrcPix);
+    } else
+	pixel = pSrc->pSourcePict->solidFill.color;
+
+    if (!exaGetRGBAFromPixel(pixel, &red, &green, &blue, &alpha,
+			     pSrc->pFormat, pSrc->format) ||
+	!exaGetPixelFromRGBA(&pixel, red, green, blue, alpha,
+			     pDst->pFormat))
+    {
+	RegionUninit(&region);
+	return -1;
+    }
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[1];
+
+	pixmaps[0].as_dst = TRUE;
+	pixmaps[0].as_src = FALSE;
+	pixmaps[0].pPix = pDstPix;
+	pixmaps[0].pReg = &region;
+	exaDoMigration(pixmaps, 1, TRUE);
+    }
+
+    if (!exaPixmapHasGpuCopy(pDstPix)) {
+	RegionUninit(&region);
+	return 0;
+    }
+
+    if (!(*pExaScr->info->PrepareSolid) (pDstPix, GXcopy, 0xffffffff, pixel))
+    {
+	RegionUninit(&region);
+	return -1;
+    }
+
+    nbox = RegionNumRects(&region);
+    pbox = RegionRects(&region);
+
+    while (nbox--)
+    {
+	(*pExaScr->info->Solid) (pDstPix, pbox->x1, pbox->y1, pbox->x2, pbox->y2);
+	pbox++;
+    }
+
+    (*pExaScr->info->DoneSolid) (pDstPix);
+    exaMarkSync(pDst->pDrawable->pScreen);
+
+    RegionUninit(&region);
+    return 1;
+}
+
+static int
+exaTryDriverCompositeRects(CARD8	       op,
+			   PicturePtr	       pSrc,
+			   PicturePtr	       pMask,
+			   PicturePtr	       pDst,
+			   int                 nrect,
+			   ExaCompositeRectPtr rects)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+    int src_off_x = 0, src_off_y = 0, mask_off_x = 0, mask_off_y = 0;
+    int dst_off_x, dst_off_y;
+    PixmapPtr pSrcPix = NULL, pMaskPix = NULL, pDstPix;
+    ExaPixmapPrivPtr pSrcExaPix = NULL, pMaskExaPix = NULL, pDstExaPix;
+
+    if (!pExaScr->info->PrepareComposite)
+	return -1;
+
+    if (pSrc->pDrawable) {
+	pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
+	pSrcExaPix = ExaGetPixmapPriv(pSrcPix);
+    }
+
+    if (pMask && pMask->pDrawable) {
+	pMaskPix = exaGetDrawablePixmap(pMask->pDrawable);
+	pMaskExaPix = ExaGetPixmapPriv(pMaskPix);
+    }
+
+    pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
+    pDstExaPix = ExaGetPixmapPriv(pDstPix);
+
+    /* Check whether the accelerator can use these pixmaps.
+     * FIXME: If it cannot, use temporary pixmaps so that the drawing
+     * happens within limits.
+     */
+    if (pDstExaPix->accel_blocked ||
+	(pSrcExaPix && pSrcExaPix->accel_blocked) ||
+	(pMaskExaPix && pMaskExaPix->accel_blocked))
+    {
+	return -1;
+    }
+
+    if (pExaScr->info->CheckComposite &&
+	!(*pExaScr->info->CheckComposite) (op, pSrc, pMask, pDst))
+    {
+	return -1;
+    }
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[3];
+	int i = 0;
+
+	pixmaps[i].as_dst = TRUE;
+	pixmaps[i].as_src = exaOpReadsDestination(op);
+	pixmaps[i].pPix = pDstPix;
+	pixmaps[i].pReg = NULL;
+	i++;
+
+	if (pSrcPix) {
+	    pixmaps[i].as_dst = FALSE;
+	    pixmaps[i].as_src = TRUE;
+	    pixmaps[i].pPix = pSrcPix;
+	    pixmaps[i].pReg = NULL;
+	    i++;
+	}
+
+	if (pMaskPix) {
+	    pixmaps[i].as_dst = FALSE;
+	    pixmaps[i].as_src = TRUE;
+	    pixmaps[i].pPix = pMaskPix;
+	    pixmaps[i].pReg = NULL;
+	    i++;
+	}
+
+	exaDoMigration(pixmaps, i, TRUE);
+    }
+
+    pDstPix = exaGetOffscreenPixmap (pDst->pDrawable, &dst_off_x, &dst_off_y);
+    if (!pDstPix)
+	return 0;
+
+    if (pSrcPix) {
+	pSrcPix = exaGetOffscreenPixmap (pSrc->pDrawable, &src_off_x, &src_off_y);
+	if (!pSrcPix)
+	    return 0;
+    }
+
+    if (pMaskPix) {
+	pMaskPix = exaGetOffscreenPixmap (pMask->pDrawable, &mask_off_x, &mask_off_y);
+	if (!pMaskPix)
+	    return 0;
+    }
+
+    if (!(*pExaScr->info->PrepareComposite) (op, pSrc, pMask, pDst, pSrcPix,
+					     pMaskPix, pDstPix))
+	return -1;
+
+    while (nrect--)
+    {
+	INT16 xDst = rects->xDst + pDst->pDrawable->x;
+	INT16 yDst = rects->yDst + pDst->pDrawable->y;
+	INT16 xMask = rects->xMask;
+	INT16 yMask = rects->yMask;
+	INT16 xSrc = rects->xSrc;
+	INT16 ySrc = rects->ySrc;
+	RegionRec region;
+	BoxPtr pbox;
+	int nbox;
+
+	if (pMaskPix) {
+	    xMask += pMask->pDrawable->x;
+	    yMask += pMask->pDrawable->y;
+	}
+
+	if (pSrcPix) {
+	    xSrc += pSrc->pDrawable->x;
+	    ySrc += pSrc->pDrawable->y;
+	}
+
+	if (!miComputeCompositeRegion (&region, pSrc, pMask, pDst,
+				       xSrc, ySrc, xMask, yMask, xDst, yDst,
+				       rects->width, rects->height))
+	    goto next_rect;
+
+	RegionTranslate(&region, dst_off_x, dst_off_y);
+
+	nbox = RegionNumRects(&region);
+	pbox = RegionRects(&region);
+
+	xMask = xMask + mask_off_x - xDst - dst_off_x;
+	yMask = yMask + mask_off_y - yDst - dst_off_y;
+	xSrc = xSrc + src_off_x - xDst - dst_off_x;
+	ySrc = ySrc + src_off_y - yDst - dst_off_y;
+
+	while (nbox--)
+	{
+	    (*pExaScr->info->Composite) (pDstPix,
+					 pbox->x1 + xSrc,
+					 pbox->y1 + ySrc,
+					 pbox->x1 + xMask,
+					 pbox->y1 + yMask,
+					 pbox->x1,
+					 pbox->y1,
+					 pbox->x2 - pbox->x1,
+					 pbox->y2 - pbox->y1);
+	    pbox++;
+	}
+
+    next_rect:
+	RegionUninit(&region);
+
+	rects++;
+    }
+
+    (*pExaScr->info->DoneComposite) (pDstPix);
+    exaMarkSync(pDst->pDrawable->pScreen);
+
+    return 1;
+}
+
+/**
+ * Copy a number of rectangles from source to destination in a single
+ * operation. This is specialized for glyph rendering: we don't have the
+ * special-case fallbacks found in exaComposite() - if the driver can support
+ * it, we use the driver functionality, otherwise we fall back straight to
+ * software.
+ */
+void
+exaCompositeRects(CARD8	              op,
+		  PicturePtr	      pSrc,
+		  PicturePtr	      pMask,
+		  PicturePtr	      pDst,
+		  int                 nrect,
+		  ExaCompositeRectPtr rects)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+    int n;
+    ExaCompositeRectPtr r;
+    int ret;
+
+    /* If we get a mask, that means we're rendering to the exaGlyphs
+     * destination directly, so the damage layer takes care of this.
+     */
+    if (!pMask) {
+	RegionRec region;
+	int x1 = MAXSHORT;
+	int y1 = MAXSHORT;
+	int x2 = MINSHORT;
+	int y2 = MINSHORT;
+	BoxRec box;
+    
+	/* We have to manage the damage ourselves, since CompositeRects isn't
+	 * something in the screen that can be managed by the damage extension,
+	 * and EXA depends on damage to track what needs to be migrated between
+	 * the gpu and the cpu.
+	 */
+
+	/* Compute the overall extents of the composited region - we're making
+	 * the assumption here that we are compositing a bunch of glyphs that
+	 * cluster closely together and damaging each glyph individually would
+	 * be a loss compared to damaging the bounding box.
+	 */
+	n = nrect;
+	r = rects;
+	while (n--) {
+	    int rect_x2 = r->xDst + r->width;
+	    int rect_y2 = r->yDst + r->height;
+
+	    if (r->xDst < x1) x1 = r->xDst;
+	    if (r->yDst < y1) y1 = r->yDst;
+	    if (rect_x2 > x2) x2 = rect_x2;
+	    if (rect_y2 > y2) y2 = rect_y2;
+
+	    r++;
+	}
+
+	if (x2 <= x1 || y2 <= y1)
+	    return;
+
+	box.x1 = x1;
+	box.x2 = x2 < MAXSHORT ? x2 : MAXSHORT;
+	box.y1 = y1;
+	box.y2 = y2 < MAXSHORT ? y2 : MAXSHORT;
+
+ 	/* The pixmap migration code relies on pendingDamage indicating
+	 * the bounds of the current rendering, so we need to force 
+	 * the actual damage into that region before we do anything, and
+	 * (see use of DamagePendingRegion in exaCopyDirty)
+	 */
+
+	RegionInit(&region, &box, 1);
+    
+	DamageRegionAppend(pDst->pDrawable, &region);
+
+	RegionUninit(&region);
+    }
+    
+    /************************************************************/
+    
+    ValidatePicture (pSrc);
+    if (pMask)
+	ValidatePicture (pMask);
+    ValidatePicture (pDst);
+
+    ret = exaTryDriverCompositeRects(op, pSrc, pMask, pDst, nrect, rects);
+
+    if (ret != 1) {
+	if (ret == -1 && op == PictOpOver && pMask && pMask->componentAlpha &&
+	    (!pExaScr->info->CheckComposite ||
+	     ((*pExaScr->info->CheckComposite)(PictOpOutReverse, pSrc, pMask,
+					       pDst) &&
+	      (*pExaScr->info->CheckComposite)(PictOpAdd, pSrc, pMask, pDst)))) {
+	    ret = exaTryDriverCompositeRects(PictOpOutReverse, pSrc, pMask,
+					     pDst, nrect, rects);
+	    if (ret == 1) {
+		op = PictOpAdd;
+		ret = exaTryDriverCompositeRects(op, pSrc, pMask, pDst, nrect,
+						 rects);
+	    }
+	}
+
+	if (ret != 1) {
+	    n = nrect;
+	    r = rects;
+	    while (n--) {
+		ExaCheckComposite (op, pSrc, pMask, pDst,
+				   r->xSrc, r->ySrc,
+				   r->xMask, r->yMask,
+				   r->xDst, r->yDst,
+				   r->width, r->height);
+		r++;
+	    }
+	}
+    }
+    
+    /************************************************************/
+
+    if (!pMask) {
+	/* Now we have to flush the damage out from pendingDamage => damage 
+	 * Calling DamageRegionProcessPending has that effect.
+	 */
+
+	DamageRegionProcessPending(pDst->pDrawable);
+    }
+}
+
+static int
+exaTryDriverComposite(CARD8		op,
+		      PicturePtr	pSrc,
+		      PicturePtr	pMask,
+		      PicturePtr	pDst,
+		      INT16		xSrc,
+		      INT16		ySrc,
+		      INT16		xMask,
+		      INT16		yMask,
+		      INT16		xDst,
+		      INT16		yDst,
+		      CARD16		width,
+		      CARD16		height)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+    RegionRec region;
+    BoxPtr pbox;
+    int nbox;
+    int src_off_x, src_off_y, mask_off_x, mask_off_y, dst_off_x, dst_off_y;
+    PixmapPtr pSrcPix = NULL, pMaskPix = NULL, pDstPix;
+    ExaPixmapPrivPtr pSrcExaPix = NULL, pMaskExaPix = NULL, pDstExaPix;
+
+    if (pSrc->pDrawable) {
+	pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
+	pSrcExaPix = ExaGetPixmapPriv(pSrcPix);
+    }
+
+    pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
+    pDstExaPix = ExaGetPixmapPriv(pDstPix);
+
+    if (pMask && pMask->pDrawable) {
+	pMaskPix = exaGetDrawablePixmap(pMask->pDrawable);
+        pMaskExaPix = ExaGetPixmapPriv(pMaskPix);
+    }
+
+    /* Check whether the accelerator can use these pixmaps.
+     * FIXME: If it cannot, use temporary pixmaps so that the drawing
+     * happens within limits.
+     */
+    if (pDstExaPix->accel_blocked ||
+	(pSrcExaPix && pSrcExaPix->accel_blocked) ||
+	(pMaskExaPix && (pMaskExaPix->accel_blocked)))
+    {
+	return -1;
+    }
+
+    xDst += pDst->pDrawable->x;
+    yDst += pDst->pDrawable->y;
+
+    if (pMaskPix) {
+	xMask += pMask->pDrawable->x;
+	yMask += pMask->pDrawable->y;
+    }
+
+    if (pSrcPix) {
+	xSrc += pSrc->pDrawable->x;
+	ySrc += pSrc->pDrawable->y;
+    }
+
+    if (pExaScr->info->CheckComposite &&
+	!(*pExaScr->info->CheckComposite) (op, pSrc, pMask, pDst))
+    {
+	return -1;
+    }
+
+    if (!miComputeCompositeRegion (&region, pSrc, pMask, pDst,
+				   xSrc, ySrc, xMask, yMask, xDst, yDst,
+				   width, height))
+	return 1;
+
+    exaGetDrawableDeltas (pDst->pDrawable, pDstPix, &dst_off_x, &dst_off_y);
+
+    RegionTranslate(&region, dst_off_x, dst_off_y);
+
+    if (pExaScr->do_migration) {
+	ExaMigrationRec pixmaps[3];
+	int i = 0;
+
+	pixmaps[i].as_dst = TRUE;
+	pixmaps[i].as_src = exaOpReadsDestination(op);
+	pixmaps[i].pPix = pDstPix;
+	pixmaps[i].pReg = pixmaps[0].as_src ? NULL : &region;
+	i++;
+
+	if (pSrcPix) {
+	    pixmaps[i].as_dst = FALSE;
+	    pixmaps[i].as_src = TRUE;
+	    pixmaps[i].pPix = pSrcPix;
+	    pixmaps[i].pReg = NULL;
+	    i++;
+	}
+
+	if (pMaskPix) {
+	    pixmaps[i].as_dst = FALSE;
+	    pixmaps[i].as_src = TRUE;
+	    pixmaps[i].pPix = pMaskPix;
+	    pixmaps[i].pReg = NULL;
+	    i++;
+	}
+
+	exaDoMigration(pixmaps, i, TRUE);
+    }
+
+    if (pSrcPix) {
+	pSrcPix = exaGetOffscreenPixmap (pSrc->pDrawable, &src_off_x, &src_off_y);
+	if (!pSrcPix) {
+	    RegionUninit(&region);
+	    return 0;
+	}
+    }
+
+    if (pMaskPix) {
+	pMaskPix = exaGetOffscreenPixmap (pMask->pDrawable, &mask_off_x,
+					  &mask_off_y);
+	if (!pMaskPix) {
+	    RegionUninit(&region);
+	    return 0;
+	}
+    }
+
+    if (!exaPixmapHasGpuCopy(pDstPix)) {
+	RegionUninit(&region);
+	return 0;
+    }
+
+    if (!(*pExaScr->info->PrepareComposite) (op, pSrc, pMask, pDst, pSrcPix,
+					     pMaskPix, pDstPix))
+    {
+	RegionUninit(&region);
+	return -1;
+    }
+
+    nbox = RegionNumRects(&region);
+    pbox = RegionRects(&region);
+
+    xMask = xMask + mask_off_x - xDst - dst_off_x;
+    yMask = yMask + mask_off_y - yDst - dst_off_y;
+
+    xSrc = xSrc + src_off_x - xDst - dst_off_x;
+    ySrc = ySrc + src_off_y - yDst - dst_off_y;
+
+    while (nbox--)
+    {
+	(*pExaScr->info->Composite) (pDstPix,
+				     pbox->x1 + xSrc,
+				     pbox->y1 + ySrc,
+				     pbox->x1 + xMask,
+				     pbox->y1 + yMask,
+				     pbox->x1,
+				     pbox->y1,
+				     pbox->x2 - pbox->x1,
+				     pbox->y2 - pbox->y1);
+	pbox++;
+    }
+    (*pExaScr->info->DoneComposite) (pDstPix);
+    exaMarkSync(pDst->pDrawable->pScreen);
+
+    RegionUninit(&region);
+    return 1;
+}
+
+/**
+ * exaTryMagicTwoPassCompositeHelper implements PictOpOver using two passes of
+ * simpler operations PictOpOutReverse and PictOpAdd. Mainly used for component
+ * alpha and limited 1-tmu cards.
+ *
+ * From http://anholt.livejournal.com/32058.html:
+ *
+ * The trouble is that component-alpha rendering requires two different sources
+ * for blending: one for the source value to the blender, which is the
+ * per-channel multiplication of source and mask, and one for the source alpha
+ * for multiplying with the destination channels, which is the multiplication
+ * of the source channels by the mask alpha. So the equation for Over is:
+ *
+ * dst.A = src.A * mask.A + (1 - (src.A * mask.A)) * dst.A
+ * dst.R = src.R * mask.R + (1 - (src.A * mask.R)) * dst.R
+ * dst.G = src.G * mask.G + (1 - (src.A * mask.G)) * dst.G
+ * dst.B = src.B * mask.B + (1 - (src.A * mask.B)) * dst.B
+ *
+ * But we can do some simpler operations, right? How about PictOpOutReverse,
+ * which has a source factor of 0 and dest factor of (1 - source alpha). We
+ * can get the source alpha value (srca.X = src.A * mask.X) out of the texture
+ * blenders pretty easily. So we can do a component-alpha OutReverse, which
+ * gets us:
+ *
+ * dst.A = 0 + (1 - (src.A * mask.A)) * dst.A
+ * dst.R = 0 + (1 - (src.A * mask.R)) * dst.R
+ * dst.G = 0 + (1 - (src.A * mask.G)) * dst.G
+ * dst.B = 0 + (1 - (src.A * mask.B)) * dst.B
+ *
+ * OK. And if an op doesn't use the source alpha value for the destination
+ * factor, then we can do the channel multiplication in the texture blenders
+ * to get the source value, and ignore the source alpha that we wouldn't use.
+ * We've supported this in the Radeon driver for a long time. An example would
+ * be PictOpAdd, which does:
+ *
+ * dst.A = src.A * mask.A + dst.A
+ * dst.R = src.R * mask.R + dst.R
+ * dst.G = src.G * mask.G + dst.G
+ * dst.B = src.B * mask.B + dst.B
+ *
+ * Hey, this looks good! If we do a PictOpOutReverse and then a PictOpAdd right
+ * after it, we get:
+ *
+ * dst.A = src.A * mask.A + ((1 - (src.A * mask.A)) * dst.A)
+ * dst.R = src.R * mask.R + ((1 - (src.A * mask.R)) * dst.R)
+ * dst.G = src.G * mask.G + ((1 - (src.A * mask.G)) * dst.G)
+ * dst.B = src.B * mask.B + ((1 - (src.A * mask.B)) * dst.B)
+ */
+
+static int
+exaTryMagicTwoPassCompositeHelper(CARD8 op,
+				  PicturePtr pSrc,
+				  PicturePtr pMask,
+				  PicturePtr pDst,
+				  INT16 xSrc,
+				  INT16 ySrc,
+				  INT16 xMask,
+				  INT16 yMask,
+				  INT16 xDst,
+				  INT16 yDst,
+				  CARD16 width,
+				  CARD16 height)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+
+    assert(op == PictOpOver);
+
+    if (pExaScr->info->CheckComposite &&
+	(!(*pExaScr->info->CheckComposite)(PictOpOutReverse, pSrc, pMask,
+					   pDst) ||
+	 !(*pExaScr->info->CheckComposite)(PictOpAdd, pSrc, pMask, pDst)))
+    {
+	return -1;
+    }
+
+    /* Now, we think we should be able to accelerate this operation. First,
+     * composite the destination to be the destination times the source alpha
+     * factors.
+     */
+    exaComposite(PictOpOutReverse, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask,
+		 xDst, yDst, width, height);
+
+    /* Then, add in the source value times the destination alpha factors (1.0).
+     */
+    exaComposite(PictOpAdd, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask,
+		 xDst, yDst, width, height);
+
+    return 1;
+}
+
+void
+exaComposite(CARD8	op,
+	     PicturePtr pSrc,
+	     PicturePtr pMask,
+	     PicturePtr pDst,
+	     INT16	xSrc,
+	     INT16	ySrc,
+	     INT16	xMask,
+	     INT16	yMask,
+	     INT16	xDst,
+	     INT16	yDst,
+	     CARD16	width,
+	     CARD16	height)
+{
+    ExaScreenPriv (pDst->pDrawable->pScreen);
+    int ret = -1;
+    Bool saveSrcRepeat = pSrc->repeat;
+    Bool saveMaskRepeat = pMask ? pMask->repeat : 0;
+    RegionRec region;
+
+    if (pExaScr->swappedOut)
+	goto fallback;
+
+    /* Remove repeat in source if useless */
+    if (pSrc->pDrawable && pSrc->repeat && !pSrc->transform && xSrc >= 0 &&
+	(xSrc + width) <= pSrc->pDrawable->width && ySrc >= 0 &&
+	(ySrc + height) <= pSrc->pDrawable->height)
+	    pSrc->repeat = 0;
+
+    if (!pMask && !pSrc->alphaMap && !pDst->alphaMap &&
+	(op == PictOpSrc || (op == PictOpOver && !PICT_FORMAT_A(pSrc->format))))
+    {
+	if (pSrc->pDrawable ?
+	    (pSrc->pDrawable->width == 1 && pSrc->pDrawable->height == 1 &&
+	     pSrc->repeat) :
+	    (pSrc->pSourcePict->type == SourcePictTypeSolidFill))
+	{
+	    ret = exaTryDriverSolidFill(pSrc, pDst, xSrc, ySrc, xDst, yDst,
+					width, height);
+	    if (ret == 1)
+		goto done;
+	} else if (pSrc->pDrawable && !pSrc->transform &&
+	    ((op == PictOpSrc &&
+	      (pSrc->format == pDst->format ||
+	       (PICT_FORMAT_COLOR(pDst->format) &&
+		PICT_FORMAT_COLOR(pSrc->format) &&
+		pDst->format == PICT_FORMAT(PICT_FORMAT_BPP(pSrc->format),
+					    PICT_FORMAT_TYPE(pSrc->format),
+					    0,
+					    PICT_FORMAT_R(pSrc->format),
+					    PICT_FORMAT_G(pSrc->format),
+					    PICT_FORMAT_B(pSrc->format))))) ||
+	     (op == PictOpOver && pSrc->format == pDst->format &&
+	      !PICT_FORMAT_A(pSrc->format))))
+	{
+	    if (!pSrc->repeat && xSrc >= 0 && ySrc >= 0 &&
+		(xSrc + width <= pSrc->pDrawable->width) &&
+		(ySrc + height <= pSrc->pDrawable->height))
+	    {
+		Bool ret;
+		xDst += pDst->pDrawable->x;
+		yDst += pDst->pDrawable->y;
+		xSrc += pSrc->pDrawable->x;
+		ySrc += pSrc->pDrawable->y;
+
+		if (!miComputeCompositeRegion (&region, pSrc, pMask, pDst,
+					       xSrc, ySrc, xMask, yMask, xDst,
+					       yDst, width, height))
+		    goto done;
+
+		ret = exaHWCopyNtoN(pSrc->pDrawable, pDst->pDrawable, NULL,
+			     RegionRects(&region), RegionNumRects(&region),
+			     xSrc - xDst, ySrc - yDst, FALSE, FALSE);
+		RegionUninit(&region);
+
+		/* Reset values to their original values. */
+		xDst -= pDst->pDrawable->x;
+		yDst -= pDst->pDrawable->y;
+		xSrc -= pSrc->pDrawable->x;
+		ySrc -= pSrc->pDrawable->y;
+
+		if (!ret)
+		    goto fallback;
+
+		goto done;
+	    }
+
+	    if (pSrc->repeat && pSrc->repeatType == RepeatNormal &&
+		pSrc->pDrawable->type == DRAWABLE_PIXMAP)
+	    {
+		DDXPointRec patOrg;
+
+		/* Let's see if the driver can do the repeat in one go */
+		if (pExaScr->info->PrepareComposite && !pSrc->alphaMap &&
+		    !pDst->alphaMap)
+		{
+		    ret = exaTryDriverComposite(op, pSrc, pMask, pDst, xSrc,
+						ySrc, xMask, yMask, xDst, yDst,
+						width, height);
+		    if (ret == 1)
+			goto done;
+		}
+
+		/* Now see if we can use exaFillRegionTiled() */
+		xDst += pDst->pDrawable->x;
+		yDst += pDst->pDrawable->y;
+		xSrc += pSrc->pDrawable->x;
+		ySrc += pSrc->pDrawable->y;
+
+		if (!miComputeCompositeRegion (&region, pSrc, pMask, pDst, xSrc,
+					       ySrc, xMask, yMask, xDst, yDst,
+					       width, height))
+		    goto done;
+
+		/* pattern origin is the point in the destination drawable
+		 * corresponding to (0,0) in the source */
+		patOrg.x = xDst - xSrc;
+		patOrg.y = yDst - ySrc;
+
+		ret = exaFillRegionTiled(pDst->pDrawable, &region,
+					 (PixmapPtr)pSrc->pDrawable,
+					 &patOrg, FB_ALLONES, GXcopy, CT_NONE);
+
+		RegionUninit(&region);
+
+		if (ret)
+		    goto done;
+
+		/* Let's be correct and restore the variables to their original state. */
+		xDst -= pDst->pDrawable->x;
+		yDst -= pDst->pDrawable->y;
+		xSrc -= pSrc->pDrawable->x;
+		ySrc -= pSrc->pDrawable->y;
+	    }
+	}
+    }
+
+    /* Remove repeat in mask if useless */
+    if (pMask && pMask->pDrawable && pMask->repeat && !pMask->transform &&
+	xMask >= 0 && (xMask + width) <= pMask->pDrawable->width &&
+	yMask >= 0 && (yMask + height) <= pMask->pDrawable->height)
+	    pMask->repeat = 0;
+
+    if (pExaScr->info->PrepareComposite &&
+	!pSrc->alphaMap && (!pMask || !pMask->alphaMap) && !pDst->alphaMap)
+    {
+	Bool isSrcSolid;
+
+	ret = exaTryDriverComposite(op, pSrc, pMask, pDst, xSrc, ySrc, xMask,
+				    yMask, xDst, yDst, width, height);
+	if (ret == 1)
+	    goto done;
+
+	/* For generic masks and solid src pictures, mach64 can do Over in two
+	 * passes, similar to the component-alpha case.
+	 */
+	isSrcSolid = pSrc->pDrawable ?
+	    (pSrc->pDrawable->width == 1 && pSrc->pDrawable->height == 1 &&
+	     pSrc->repeat) :
+	    (pSrc->pSourcePict->type == SourcePictTypeSolidFill);
+
+	/* If we couldn't do the Composite in a single pass, and it was a
+	 * component-alpha Over, see if we can do it in two passes with
+	 * an OutReverse and then an Add.
+	 */
+	if (ret == -1 && op == PictOpOver && pMask &&
+	    (pMask->componentAlpha || isSrcSolid)) {
+	    ret = exaTryMagicTwoPassCompositeHelper(op, pSrc, pMask, pDst,
+						    xSrc, ySrc,
+						    xMask, yMask, xDst, yDst,
+						    width, height);
+	    if (ret == 1)
+		goto done;
+	}
+    }
+
+fallback:
+#if DEBUG_TRACE_FALL
+    exaPrintCompositeFallback (op, pSrc, pMask, pDst);
+#endif
+
+    ExaCheckComposite (op, pSrc, pMask, pDst, xSrc, ySrc,
+		      xMask, yMask, xDst, yDst, width, height);
+
+done:
+    pSrc->repeat = saveSrcRepeat;
+    if (pMask)
+	pMask->repeat = saveMaskRepeat;
+}
+
+/**
+ * Same as miCreateAlphaPicture, except it uses ExaCheckPolyFillRect instead
+ * of PolyFillRect to initialize the pixmap after creating it, to prevent
+ * the pixmap from being migrated.
+ *
+ * See the comments about exaTrapezoids and exaTriangles.
+ */
+static PicturePtr
+exaCreateAlphaPicture (ScreenPtr     pScreen,
+                       PicturePtr    pDst,
+                       PictFormatPtr pPictFormat,
+                       CARD16        width,
+                       CARD16        height)
+{
+    PixmapPtr	    pPixmap;
+    PicturePtr	    pPicture;
+    GCPtr	    pGC;
+    int		    error;
+    xRectangle	    rect;
+
+    if (width > 32767 || height > 32767)
+	return 0;
+
+    if (!pPictFormat)
+    {
+	if (pDst->polyEdge == PolyEdgeSharp)
+	    pPictFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+	else
+	    pPictFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+	if (!pPictFormat)
+	    return 0;
+    }
+
+    pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+					pPictFormat->depth, 0);
+    if (!pPixmap)
+	return 0;
+    pGC = GetScratchGC (pPixmap->drawable.depth, pScreen);
+    if (!pGC)
+    {
+	(*pScreen->DestroyPixmap) (pPixmap);
+	return 0;
+    }
+    ValidateGC (&pPixmap->drawable, pGC);
+    rect.x = 0;
+    rect.y = 0;
+    rect.width = width;
+    rect.height = height;
+    ExaCheckPolyFillRect (&pPixmap->drawable, pGC, 1, &rect);
+    exaPixmapDirty (pPixmap, 0, 0, width, height);
+    FreeScratchGC (pGC);
+    pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat,
+			      0, 0, serverClient, &error);
+    (*pScreen->DestroyPixmap) (pPixmap);
+    return pPicture;
+}
+
+/**
+ * exaTrapezoids is essentially a copy of miTrapezoids that uses
+ * exaCreateAlphaPicture instead of miCreateAlphaPicture.
+ *
+ * The problem with miCreateAlphaPicture is that it calls PolyFillRect
+ * to initialize the contents after creating the pixmap, which
+ * causes the pixmap to be moved in for acceleration. The subsequent
+ * call to RasterizeTrapezoid won't be accelerated however, which
+ * forces the pixmap to be moved out again.
+ *
+ * exaCreateAlphaPicture avoids this roundtrip by using ExaCheckPolyFillRect
+ * to initialize the contents.
+ */
+void
+exaTrapezoids (CARD8 op, PicturePtr pSrc, PicturePtr pDst,
+               PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
+               int ntrap, xTrapezoid *traps)
+{
+    ScreenPtr		pScreen = pDst->pDrawable->pScreen;
+    PictureScreenPtr    ps = GetPictureScreen(pScreen);
+    BoxRec		bounds;
+
+    if (maskFormat) {
+	PicturePtr	pPicture;
+	INT16		xDst, yDst;
+	INT16		xRel, yRel;
+
+	miTrapezoidBounds (ntrap, traps, &bounds);
+
+	if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
+	    return;
+
+	xDst = traps[0].left.p1.x >> 16;
+	yDst = traps[0].left.p1.y >> 16;
+
+	pPicture = exaCreateAlphaPicture (pScreen, pDst, maskFormat,
+	                                  bounds.x2 - bounds.x1,
+	                                  bounds.y2 - bounds.y1);
+	if (!pPicture)
+	    return;
+
+	exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+	for (; ntrap; ntrap--, traps++)
+	    (*ps->RasterizeTrapezoid) (pPicture, traps,
+				       -bounds.x1, -bounds.y1);
+	exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+
+	xRel = bounds.x1 + xSrc - xDst;
+	yRel = bounds.y1 + ySrc - yDst;
+	CompositePicture (op, pSrc, pPicture, pDst,
+			  xRel, yRel, 0, 0, bounds.x1, bounds.y1,
+			  bounds.x2 - bounds.x1,
+			  bounds.y2 - bounds.y1);
+	FreePicture (pPicture, 0);
+    } else {
+	if (pDst->polyEdge == PolyEdgeSharp)
+	    maskFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+	else
+	    maskFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+	for (; ntrap; ntrap--, traps++)
+	    exaTrapezoids (op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, traps);
+    }
+}
+
+/**
+ * exaTriangles is essentially a copy of miTriangles that uses
+ * exaCreateAlphaPicture instead of miCreateAlphaPicture.
+ *
+ * The problem with miCreateAlphaPicture is that it calls PolyFillRect
+ * to initialize the contents after creating the pixmap, which
+ * causes the pixmap to be moved in for acceleration. The subsequent
+ * call to AddTriangles won't be accelerated however, which forces the pixmap
+ * to be moved out again.
+ *
+ * exaCreateAlphaPicture avoids this roundtrip by using ExaCheckPolyFillRect
+ * to initialize the contents.
+ */
+void
+exaTriangles (CARD8 op, PicturePtr pSrc, PicturePtr pDst,
+	      PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
+	      int ntri, xTriangle *tris)
+{
+    ScreenPtr		pScreen = pDst->pDrawable->pScreen;
+    PictureScreenPtr    ps = GetPictureScreen(pScreen);
+    BoxRec		bounds;
+
+    if (maskFormat) {
+	PicturePtr	pPicture;
+	INT16		xDst, yDst;
+	INT16		xRel, yRel;
+
+	miTriangleBounds (ntri, tris, &bounds);
+
+	if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
+	    return;
+
+	xDst = tris[0].p1.x >> 16;
+	yDst = tris[0].p1.y >> 16;
+
+	pPicture = exaCreateAlphaPicture (pScreen, pDst, maskFormat,
+					  bounds.x2 - bounds.x1,
+					  bounds.y2 - bounds.y1);
+	if (!pPicture)
+	    return;
+
+	exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+	(*ps->AddTriangles) (pPicture, -bounds.x1, -bounds.y1, ntri, tris);
+	exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+
+	xRel = bounds.x1 + xSrc - xDst;
+	yRel = bounds.y1 + ySrc - yDst;
+	CompositePicture (op, pSrc, pPicture, pDst,
+			  xRel, yRel, 0, 0, bounds.x1, bounds.y1,
+			  bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
+	FreePicture (pPicture, 0);
+    } else {
+	if (pDst->polyEdge == PolyEdgeSharp)
+	    maskFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+	else
+	    maskFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+
+	for (; ntri; ntri--, tris++)
+	    exaTriangles (op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, tris);
+    }
+}
diff --git a/exa/exa_unaccel.c b/exa/exa_unaccel.c
new file mode 100644
index 0000000..bd533c4
--- /dev/null
+++ b/exa/exa_unaccel.c
@@ -0,0 +1,765 @@
+/*
+ *
+ * Copyright © 1999 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "exa_priv.h"
+
+#include "mipict.h"
+
+/*
+ * These functions wrap the low-level fb rendering functions and
+ * synchronize framebuffer/accelerated drawing by stalling until
+ * the accelerator is idle
+ */
+
+/**
+ * Calls exaPrepareAccess with EXA_PREPARE_SRC for the tile, if that is the
+ * current fill style.
+ *
+ * Solid doesn't use an extra pixmap source, and Stippled/OpaqueStippled are
+ * 1bpp and never in fb, so we don't worry about them.
+ * We should worry about them for completeness sake and going forward.
+ */
+void
+exaPrepareAccessGC(GCPtr pGC)
+{
+    if (pGC->stipple)
+        exaPrepareAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
+    if (pGC->fillStyle == FillTiled)
+	exaPrepareAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
+}
+
+/**
+ * Finishes access to the tile in the GC, if used.
+ */
+void
+exaFinishAccessGC(GCPtr pGC)
+{
+    if (pGC->fillStyle == FillTiled)
+	exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
+    if (pGC->stipple)
+        exaFinishAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
+}
+
+#if DEBUG_TRACE_FALL
+char
+exaDrawableLocation(DrawablePtr pDrawable)
+{
+    return exaDrawableIsOffscreen(pDrawable) ? 's' : 'm';
+}
+#endif /* DEBUG_TRACE_FALL */
+
+void
+ExaCheckFillSpans (DrawablePtr pDrawable, GCPtr pGC, int nspans,
+		   DDXPointPtr ppt, int *pwidth, int fSorted)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->FillSpans (pDrawable, pGC, nspans, ppt, pwidth, fSorted);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckSetSpans (DrawablePtr pDrawable, GCPtr pGC, char *psrc,
+		 DDXPointPtr ppt, int *pwidth, int nspans, int fSorted)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    pGC->ops->SetSpans (pDrawable, pGC, psrc, ppt, pwidth, nspans, fSorted);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPutImage (DrawablePtr pDrawable, GCPtr pGC, int depth,
+		 int x, int y, int w, int h, int leftPad, int format,
+		 char *bits)
+{
+    PixmapPtr pPixmap = exaGetDrawablePixmap(pDrawable);
+    ExaPixmapPriv(pPixmap);
+
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+    if (!pExaScr->prepare_access_reg || !pExaPixmap->pDamage ||
+	exaGCReadsDestination(pDrawable, pGC->planemask, pGC->fillStyle,
+			      pGC->alu, pGC->clientClipType))
+	exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    else
+	pExaScr->prepare_access_reg(pPixmap, EXA_PREPARE_DEST,
+				    DamagePendingRegion(pExaPixmap->pDamage));
+    pGC->ops->PutImage (pDrawable, pGC, depth, x, y, w, h, leftPad, format, bits);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckCopyNtoN (DrawablePtr pSrc, DrawablePtr pDst,  GCPtr pGC,
+	     BoxPtr	pbox, int nbox, int dx, int dy, Bool	reverse, 
+	     Bool upsidedown, Pixel bitplane, void *closure)
+{
+    RegionRec reg;
+    int xoff, yoff;
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrc, pDst,
+		  exaDrawableLocation(pSrc), exaDrawableLocation(pDst)));
+
+    if (pExaScr->prepare_access_reg) {
+	PixmapPtr pPixmap = exaGetDrawablePixmap(pSrc);
+
+	exaGetDrawableDeltas(pSrc, pPixmap, &xoff, &yoff);
+	RegionInit(&reg, pbox, nbox);
+	RegionTranslate(&reg, xoff + dx, yoff + dy);
+	pExaScr->prepare_access_reg(pPixmap, EXA_PREPARE_SRC, &reg);
+	RegionUninit(&reg);
+    } else
+	exaPrepareAccess (pSrc, EXA_PREPARE_SRC);
+
+    if (pExaScr->prepare_access_reg &&
+	!exaGCReadsDestination(pDst, pGC->planemask, pGC->fillStyle,
+			       pGC->alu, pGC->clientClipType)) {
+	PixmapPtr pPixmap = exaGetDrawablePixmap(pDst);
+
+	exaGetDrawableDeltas(pSrc, pPixmap, &xoff, &yoff);
+	RegionInit(&reg, pbox, nbox);
+	RegionTranslate(&reg, xoff, yoff);
+	pExaScr->prepare_access_reg(pPixmap, EXA_PREPARE_DEST, &reg);
+	RegionUninit(&reg);
+    } else
+	exaPrepareAccess (pDst, EXA_PREPARE_DEST);
+
+    /* This will eventually call fbCopyNtoN, with some calculation overhead. */
+    while (nbox--) {
+	pGC->ops->CopyArea (pSrc, pDst, pGC, pbox->x1 - pSrc->x + dx, pbox->y1 - pSrc->y + dy, 
+			pbox->x2 - pbox->x1, pbox->y2 - pbox->y1, pbox->x1 - pDst->x, pbox->y1 - pDst->y);
+	pbox++;
+    }
+    exaFinishAccess (pSrc, EXA_PREPARE_SRC);
+    exaFinishAccess (pDst, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+static void
+ExaFallbackPrepareReg(DrawablePtr pDrawable,
+		      GCPtr pGC,
+		      int x, int y, int width, int height,
+		      int index, Bool checkReads)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    ExaScreenPriv(pScreen);
+
+    if (pExaScr->prepare_access_reg &&
+	!(checkReads && exaGCReadsDestination(pDrawable,
+					      pGC->planemask,
+					      pGC->fillStyle,
+					      pGC->alu,
+					      pGC->clientClipType))) {
+	BoxRec box;
+	RegionRec reg;
+	int xoff, yoff;
+	PixmapPtr pPixmap = exaGetDrawablePixmap(pDrawable);
+
+	exaGetDrawableDeltas(pDrawable, pPixmap, &xoff, &yoff);
+	box.x1 = pDrawable->x + x + xoff;
+	box.y1 = pDrawable->y + y + yoff;
+	box.x2 = box.x1 + width;
+	box.y2 = box.y1 + height;
+
+	RegionInit(&reg, &box, 1);
+	pExaScr->prepare_access_reg(pPixmap, index, &reg);
+	RegionUninit(&reg);
+    } else
+	exaPrepareAccess(pDrawable, index);
+}
+
+
+RegionPtr
+ExaCheckCopyArea (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
+		 int srcx, int srcy, int w, int h, int dstx, int dsty)
+{
+    RegionPtr ret;
+
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrc, pDst,
+		  exaDrawableLocation(pSrc), exaDrawableLocation(pDst)));
+    ExaFallbackPrepareReg(pSrc, pGC, srcx, srcy, w, h,
+			  EXA_PREPARE_SRC, FALSE);
+    ExaFallbackPrepareReg(pDst, pGC, dstx, dsty, w, h,
+			  EXA_PREPARE_DEST, TRUE);
+    ret = pGC->ops->CopyArea (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty);
+    exaFinishAccess (pSrc, EXA_PREPARE_SRC);
+    exaFinishAccess (pDst, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+
+    return ret;
+}
+
+RegionPtr
+ExaCheckCopyPlane (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
+		  int srcx, int srcy, int w, int h, int dstx, int dsty,
+		  unsigned long bitPlane)
+{
+    RegionPtr ret;
+
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrc, pDst,
+		  exaDrawableLocation(pSrc), exaDrawableLocation(pDst)));
+    ExaFallbackPrepareReg(pSrc, pGC, srcx, srcy, w, h,
+			  EXA_PREPARE_SRC, FALSE);
+    ExaFallbackPrepareReg(pDst, pGC, dstx, dsty, w, h,
+			  EXA_PREPARE_DEST, TRUE);
+    ret = pGC->ops->CopyPlane (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty,
+		       bitPlane);
+    exaFinishAccess (pSrc, EXA_PREPARE_SRC);
+    exaFinishAccess (pDst, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+
+    return ret;
+}
+
+void
+ExaCheckPolyPoint (DrawablePtr pDrawable, GCPtr pGC, int mode, int npt,
+		  DDXPointPtr pptInit)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    pGC->ops->PolyPoint (pDrawable, pGC, mode, npt, pptInit);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPolylines (DrawablePtr pDrawable, GCPtr pGC,
+		  int mode, int npt, DDXPointPtr ppt)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c), width %d, mode %d, count %d\n",
+		  pDrawable, exaDrawableLocation(pDrawable),
+		  pGC->lineWidth, mode, npt));
+
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->Polylines (pDrawable, pGC, mode, npt, ppt);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPolySegment (DrawablePtr pDrawable, GCPtr pGC,
+		    int nsegInit, xSegment *pSegInit)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c) width %d, count %d\n", pDrawable,
+		  exaDrawableLocation(pDrawable), pGC->lineWidth, nsegInit));
+
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->PolySegment (pDrawable, pGC, nsegInit, pSegInit);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPolyArc (DrawablePtr pDrawable, GCPtr pGC,
+		int narcs, xArc *pArcs)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->PolyArc (pDrawable, pGC, narcs, pArcs);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPolyFillRect (DrawablePtr pDrawable, GCPtr pGC,
+		     int nrect, xRectangle *prect)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->PolyFillRect (pDrawable, pGC, nrect, prect);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckImageGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
+		      int x, int y, unsigned int nglyph,
+		      CharInfoPtr *ppci, pointer pglyphBase)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c)\n", pDrawable,
+		  exaDrawableLocation(pDrawable)));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->ImageGlyphBlt (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPolyGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
+		     int x, int y, unsigned int nglyph,
+		     CharInfoPtr *ppci, pointer pglyphBase)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("to %p (%c), style %d alu %d\n", pDrawable,
+		  exaDrawableLocation(pDrawable), pGC->fillStyle, pGC->alu));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->PolyGlyphBlt (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckPushPixels (GCPtr pGC, PixmapPtr pBitmap,
+		   DrawablePtr pDrawable,
+		   int w, int h, int x, int y)
+{
+    EXA_PRE_FALLBACK_GC(pGC);
+    EXA_FALLBACK(("from %p to %p (%c,%c)\n", pBitmap, pDrawable,
+		  exaDrawableLocation(&pBitmap->drawable),
+		  exaDrawableLocation(pDrawable)));
+    ExaFallbackPrepareReg(pDrawable, pGC, x, y, w, h,
+			  EXA_PREPARE_DEST, TRUE);
+    ExaFallbackPrepareReg(&pBitmap->drawable, pGC, 0, 0, w, h,
+			  EXA_PREPARE_SRC, FALSE);
+    exaPrepareAccessGC (pGC);
+    pGC->ops->PushPixels (pGC, pBitmap, pDrawable, w, h, x, y);
+    exaFinishAccessGC (pGC);
+    exaFinishAccess (&pBitmap->drawable, EXA_PREPARE_SRC);
+    exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK_GC(pGC);
+}
+
+void
+ExaCheckCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
+{
+    DrawablePtr pDrawable = &pWin->drawable;
+    ScreenPtr pScreen = pDrawable->pScreen;
+    EXA_PRE_FALLBACK(pScreen);
+    EXA_FALLBACK(("from %p\n", pWin));
+
+    /* Only need the source bits, the destination region will be overwritten */
+    if (pExaScr->prepare_access_reg) {
+	PixmapPtr pPixmap = pScreen->GetWindowPixmap(pWin);
+	int xoff, yoff;
+
+	exaGetDrawableDeltas(&pWin->drawable, pPixmap, &xoff, &yoff);
+	RegionTranslate(prgnSrc, xoff, yoff);
+	pExaScr->prepare_access_reg(pPixmap, EXA_PREPARE_SRC, prgnSrc);
+	RegionTranslate(prgnSrc, -xoff, -yoff);
+    } else
+	exaPrepareAccess(pDrawable, EXA_PREPARE_SRC);
+
+    swap(pExaScr, pScreen, CopyWindow);
+    pScreen->CopyWindow (pWin, ptOldOrg, prgnSrc);
+    swap(pExaScr, pScreen, CopyWindow);
+    exaFinishAccess (pDrawable, EXA_PREPARE_SRC);
+    EXA_POST_FALLBACK(pScreen);
+}
+
+void
+ExaCheckGetImage(DrawablePtr pDrawable, int x, int y, int w, int h,
+		unsigned int format, unsigned long planeMask, char *d)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    EXA_PRE_FALLBACK(pScreen);
+    EXA_FALLBACK(("from %p (%c)\n", pDrawable,
+		  exaDrawableLocation(pDrawable)));
+
+    ExaFallbackPrepareReg(pDrawable, NULL, x, y, w, h,
+			  EXA_PREPARE_SRC, FALSE);
+    swap(pExaScr, pScreen, GetImage);
+    pScreen->GetImage (pDrawable, x, y, w, h, format, planeMask, d);
+    swap(pExaScr, pScreen, GetImage);
+    exaFinishAccess (pDrawable, EXA_PREPARE_SRC);
+    EXA_POST_FALLBACK(pScreen);
+}
+
+void
+ExaCheckGetSpans (DrawablePtr pDrawable,
+		 int wMax,
+		 DDXPointPtr ppt,
+		 int *pwidth,
+		 int nspans,
+		 char *pdstStart)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+
+    EXA_PRE_FALLBACK(pScreen);
+    EXA_FALLBACK(("from %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
+    exaPrepareAccess (pDrawable, EXA_PREPARE_SRC);
+    swap(pExaScr, pScreen, GetSpans);
+    pScreen->GetSpans (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
+    swap(pExaScr, pScreen, GetSpans);
+    exaFinishAccess (pDrawable, EXA_PREPARE_SRC);
+    EXA_POST_FALLBACK(pScreen);
+}
+
+static void
+ExaSrcValidate(DrawablePtr pDrawable,
+	       int x,
+	       int y,
+	       int width,
+	       int height,
+	       unsigned int subWindowMode)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    ExaScreenPriv(pScreen);
+    PixmapPtr pPix = exaGetDrawablePixmap (pDrawable);
+    BoxRec box;
+    RegionRec reg;
+    RegionPtr dst;
+    int xoff, yoff;
+
+    exaGetDrawableDeltas(pDrawable, pPix, &xoff, &yoff);
+
+    box.x1 = x + xoff;
+    box.y1 = y + yoff;
+    box.x2 = box.x1 + width;
+    box.y2 = box.y1 + height;
+
+    dst = (pExaScr->srcPix == pPix) ? &pExaScr->srcReg :
+	&pExaScr->maskReg;
+
+    RegionInit(&reg, &box, 1);
+    RegionUnion(dst, dst, &reg);
+    RegionUninit(&reg);
+
+    if (pExaScr->SavedSourceValidate) {
+        swap(pExaScr, pScreen, SourceValidate);
+        pScreen->SourceValidate(pDrawable, x, y, width, height, subWindowMode);
+        swap(pExaScr, pScreen, SourceValidate);
+    }
+}
+
+static Bool
+ExaPrepareCompositeReg(ScreenPtr  pScreen,
+		       CARD8      op,
+		       PicturePtr pSrc,
+		       PicturePtr pMask,
+		       PicturePtr pDst,
+		       INT16      xSrc,
+		       INT16      ySrc,
+		       INT16      xMask,
+		       INT16      yMask,
+		       INT16      xDst,
+		       INT16      yDst,
+		       CARD16     width,
+		       CARD16     height)
+{
+    RegionRec region;
+    RegionPtr dstReg = NULL;
+    RegionPtr srcReg = NULL;
+    RegionPtr maskReg = NULL;
+    PixmapPtr pSrcPix = NULL;
+    PixmapPtr pMaskPix = NULL;
+    PixmapPtr pDstPix;
+    ExaScreenPriv(pScreen);
+    Bool ret;
+
+
+    RegionNull(&region);
+
+    if (pSrc->pDrawable) {
+	pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
+	RegionNull(&pExaScr->srcReg);
+	srcReg = &pExaScr->srcReg;
+	pExaScr->srcPix = pSrcPix;
+	if (pSrc != pDst)
+	    RegionTranslate(pSrc->pCompositeClip,
+			     -pSrc->pDrawable->x,
+			     -pSrc->pDrawable->y);
+    }
+
+    if (pMask && pMask->pDrawable) {
+	pMaskPix = exaGetDrawablePixmap(pMask->pDrawable);
+	RegionNull(&pExaScr->maskReg);
+	maskReg = &pExaScr->maskReg;
+	if (pMask != pDst && pMask != pSrc)
+	    RegionTranslate(pMask->pCompositeClip,
+			     -pMask->pDrawable->x,
+			     -pMask->pDrawable->y);
+    }
+
+    RegionTranslate(pDst->pCompositeClip,
+		     -pDst->pDrawable->x,
+		     -pDst->pDrawable->y);
+
+    pExaScr->SavedSourceValidate = ExaSrcValidate;
+    swap(pExaScr, pScreen, SourceValidate);
+    ret = miComputeCompositeRegion (&region, pSrc, pMask, pDst,
+				    xSrc, ySrc, xMask, yMask,
+				    xDst,
+				    yDst,
+				    width, height);
+    swap(pExaScr, pScreen, SourceValidate);
+
+    RegionTranslate(pDst->pCompositeClip,
+		     pDst->pDrawable->x,
+		     pDst->pDrawable->y);
+    if (pSrc->pDrawable && pSrc != pDst)
+	RegionTranslate(pSrc->pCompositeClip,
+			 pSrc->pDrawable->x,
+			 pSrc->pDrawable->y);
+    if (pMask && pMask->pDrawable && pMask != pDst && pMask != pSrc)
+	RegionTranslate(pMask->pCompositeClip,
+			 pMask->pDrawable->x,
+			 pMask->pDrawable->y);
+
+    if (!ret) {
+	if (srcReg)
+	    RegionUninit(srcReg);
+	if (maskReg)
+	    RegionUninit(maskReg);
+
+	return FALSE;
+    }
+
+    /**
+     * Don't limit alphamaps readbacks for now until we've figured out how that
+     * should be done.
+     */
+
+    if (pSrc->alphaMap && pSrc->alphaMap->pDrawable)
+	pExaScr->prepare_access_reg(exaGetDrawablePixmap(pSrc->alphaMap->pDrawable),
+				    EXA_PREPARE_AUX_SRC,
+				    NULL);
+    if (pMask && pMask->alphaMap && pMask->alphaMap->pDrawable)
+	pExaScr->prepare_access_reg(exaGetDrawablePixmap(pMask->alphaMap->pDrawable),
+				    EXA_PREPARE_AUX_MASK,
+				    NULL);
+
+    if (pSrcPix)
+	pExaScr->prepare_access_reg(pSrcPix,
+				    EXA_PREPARE_SRC,
+				    srcReg);
+
+    if (pMaskPix)
+	pExaScr->prepare_access_reg(pMaskPix,
+				    EXA_PREPARE_MASK,
+				    maskReg);
+
+    if (srcReg)
+	RegionUninit(srcReg);
+    if (maskReg)
+	RegionUninit(maskReg);
+
+    pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
+    if (!exaOpReadsDestination(op)) {
+	int xoff;
+	int yoff;
+
+	exaGetDrawableDeltas (pDst->pDrawable, pDstPix, &xoff, &yoff);
+	RegionTranslate(&region, pDst->pDrawable->x + xoff,
+			 pDst->pDrawable->y + yoff);
+	dstReg = &region;
+    }
+
+    if (pDst->alphaMap && pDst->alphaMap->pDrawable)
+	pExaScr->prepare_access_reg(exaGetDrawablePixmap(pDst->alphaMap->pDrawable),
+				    EXA_PREPARE_AUX_DEST,
+				    dstReg);
+    pExaScr->prepare_access_reg(pDstPix, EXA_PREPARE_DEST, dstReg);
+
+    RegionUninit(&region);
+    return TRUE;
+}
+
+void
+ExaCheckComposite (CARD8      op,
+                   PicturePtr pSrc,
+                   PicturePtr pMask,
+                   PicturePtr pDst,
+                   INT16      xSrc,
+                   INT16      ySrc,
+                   INT16      xMask,
+                   INT16      yMask,
+                   INT16      xDst,
+                   INT16      yDst,
+                   CARD16     width,
+                   CARD16     height)
+{
+    ScreenPtr pScreen = pDst->pDrawable->pScreen;
+    PictureScreenPtr	ps = GetPictureScreen(pScreen);
+    EXA_PRE_FALLBACK(pScreen);
+
+    if (pExaScr->prepare_access_reg) {
+	if (!ExaPrepareCompositeReg(pScreen, op, pSrc, pMask, pDst, xSrc,
+				   ySrc, xMask, yMask, xDst, yDst, width,
+				   height))
+	    goto out_no_clip;
+    } else {
+
+	/* We need to prepare access to any separate alpha maps first,
+	 * in case the driver doesn't support EXA_PREPARE_AUX*,
+	 * in which case EXA_PREPARE_SRC may be used for moving them out.
+	 */
+
+	if (pSrc->alphaMap && pSrc->alphaMap->pDrawable)
+	    exaPrepareAccess(pSrc->alphaMap->pDrawable, EXA_PREPARE_AUX_SRC);
+	if (pMask && pMask->alphaMap && pMask->alphaMap->pDrawable)
+	    exaPrepareAccess(pMask->alphaMap->pDrawable, EXA_PREPARE_AUX_MASK);
+	if (pDst->alphaMap && pDst->alphaMap->pDrawable)
+	    exaPrepareAccess(pDst->alphaMap->pDrawable, EXA_PREPARE_AUX_DEST);
+
+	exaPrepareAccess (pDst->pDrawable, EXA_PREPARE_DEST);
+
+	EXA_FALLBACK(("from picts %p/%p to pict %p\n",
+		      pSrc, pMask, pDst));
+
+	if (pSrc->pDrawable != NULL)
+	    exaPrepareAccess (pSrc->pDrawable, EXA_PREPARE_SRC);
+	if (pMask && pMask->pDrawable != NULL)
+	    exaPrepareAccess (pMask->pDrawable, EXA_PREPARE_MASK);
+    }
+
+    swap(pExaScr, ps, Composite);
+    ps->Composite (op,
+                 pSrc,
+                 pMask,
+                 pDst,
+                 xSrc,
+                 ySrc,
+                 xMask,
+                 yMask,
+                 xDst,
+                 yDst,
+                 width,
+                 height);
+    swap(pExaScr, ps, Composite);
+    if (pMask && pMask->pDrawable != NULL)
+	exaFinishAccess (pMask->pDrawable, EXA_PREPARE_MASK);
+    if (pSrc->pDrawable != NULL)
+	exaFinishAccess (pSrc->pDrawable, EXA_PREPARE_SRC);
+    exaFinishAccess (pDst->pDrawable, EXA_PREPARE_DEST);
+    if (pDst->alphaMap && pDst->alphaMap->pDrawable)
+	exaFinishAccess(pDst->alphaMap->pDrawable, EXA_PREPARE_AUX_DEST);
+    if (pSrc->alphaMap && pSrc->alphaMap->pDrawable)
+	exaFinishAccess(pSrc->alphaMap->pDrawable, EXA_PREPARE_AUX_SRC);
+    if (pMask && pMask->alphaMap && pMask->alphaMap->pDrawable)
+	exaFinishAccess(pMask->alphaMap->pDrawable, EXA_PREPARE_AUX_MASK);
+
+out_no_clip:
+    EXA_POST_FALLBACK(pScreen);
+}
+
+/**
+ * Avoid migration ping-pong when using a mask.
+ */
+void
+ExaCheckGlyphs (CARD8	      op,
+		PicturePtr    pSrc,
+		PicturePtr    pDst,
+		PictFormatPtr maskFormat,
+		INT16	      xSrc,
+		INT16	      ySrc,
+		int	      nlist,
+		GlyphListPtr  list,
+		GlyphPtr      *glyphs)
+{
+    ScreenPtr pScreen = pDst->pDrawable->pScreen;
+    EXA_PRE_FALLBACK(pScreen);
+
+    miGlyphs(op, pSrc, pDst, maskFormat, xSrc, ySrc, nlist, list, glyphs);
+
+    EXA_POST_FALLBACK(pScreen);
+}
+
+void
+ExaCheckAddTraps (PicturePtr	pPicture,
+		  INT16		x_off,
+		  INT16		y_off,
+		  int		ntrap,
+		  xTrap		*traps)
+{
+    ScreenPtr pScreen = pPicture->pDrawable->pScreen;
+    PictureScreenPtr	ps = GetPictureScreen(pScreen);
+    EXA_PRE_FALLBACK(pScreen);
+
+    EXA_FALLBACK(("to pict %p (%c)\n",
+		  exaDrawableLocation(pPicture->pDrawable)));
+    exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+    swap(pExaScr, ps, AddTraps);
+    ps->AddTraps (pPicture, x_off, y_off, ntrap, traps);
+    swap(pExaScr, ps, AddTraps);
+    exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
+    EXA_POST_FALLBACK(pScreen);
+}
+
+/**
+ * Gets the 0,0 pixel of a pixmap.  Used for doing solid fills of tiled pixmaps
+ * that happen to be 1x1.  Pixmap must be at least 8bpp.
+ */
+CARD32
+exaGetPixmapFirstPixel (PixmapPtr pPixmap)
+{
+    switch (pPixmap->drawable.bitsPerPixel) {
+    case 32:
+	{
+	    CARD32 pixel;
+
+	    pPixmap->drawable.pScreen->GetImage(&pPixmap->drawable, 0, 0, 1, 1,
+						ZPixmap, ~0, (char*)&pixel);
+	    return pixel;
+	}
+    case 16:
+	{
+	    CARD16 pixel;
+
+	    pPixmap->drawable.pScreen->GetImage(&pPixmap->drawable, 0, 0, 1, 1,
+						ZPixmap, ~0, (char*)&pixel);
+	    return pixel;
+	}
+    case 8:
+    case 4:
+    case 1:
+	{
+	    CARD8 pixel;
+
+	    pPixmap->drawable.pScreen->GetImage(&pPixmap->drawable, 0, 0, 1, 1,
+						ZPixmap, ~0, (char*)&pixel);
+	    return pixel;
+	}
+    default:
+	FatalError("%s called for invalid bpp %d\n", __func__,
+		   pPixmap->drawable.bitsPerPixel);
+    }
+}