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+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+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.
+
+The above copyright notice and this permission notice 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
+OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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 <X11/X.h>
+#include <X11/Xmd.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "resource.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "dixfontstr.h"
+#include "scrnintstr.h"
+#include "region.h"
+#include "dixstruct.h"
+
+#include "privates.h"
+#include "dix.h"
+#include "xace.h"
+#include <assert.h>
+
+extern FontPtr defaultFont;
+
+static Bool CreateDefaultTile(GCPtr pGC);
+
+static unsigned char DefaultDash[2] = {4, 4};
+
+void
+ValidateGC(DrawablePtr pDraw, GC *pGC)
+{
+ (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw);
+ pGC->stateChanges = 0;
+ pGC->serialNumber = pDraw->serialNumber;
+}
+
+
+/*
+ * ChangeGC/ChangeGCXIDs:
+ *
+ * The client performing the gc change must be passed so that access
+ * checks can be performed on any tiles, stipples, or fonts that are
+ * specified. ddxen can call this too; they should normally pass
+ * NullClient for the client since any access checking should have
+ * already been done at a higher level.
+ *
+ * If you have any XIDs, you must use ChangeGCXIDs:
+ *
+ * CARD32 v[2];
+ * v[0] = FillTiled;
+ * v[1] = pid;
+ * ChangeGCXIDs(client, pGC, GCFillStyle|GCTile, v);
+ *
+ * However, if you need to pass a pointer to a pixmap or font, you must
+ * use ChangeGC:
+ *
+ * ChangeGCVal v[2];
+ * v[0].val = FillTiled;
+ * v[1].ptr = pPixmap;
+ * ChangeGC(client, pGC, GCFillStyle|GCTile, v);
+ *
+ * If you have neither XIDs nor pointers, you can use either function,
+ * but ChangeGC will do less work.
+ *
+ * ChangeGCVal v[2];
+ * v[0].val = foreground;
+ * v[1].val = background;
+ * ChangeGC(client, pGC, GCForeground|GCBackground, v);
+ */
+
+#define NEXTVAL(_type, _var) { \
+ _var = (_type)(pUnion->val); pUnion++; \
+ }
+
+#define NEXT_PTR(_type, _var) { \
+ _var = (_type)pUnion->ptr; pUnion++; }
+
+int
+ChangeGC(ClientPtr client, GC *pGC, BITS32 mask, ChangeGCValPtr pUnion)
+{
+ BITS32 index2;
+ int error = 0;
+ PixmapPtr pPixmap;
+ BITS32 maskQ;
+
+ assert(pUnion);
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+
+ maskQ = mask; /* save these for when we walk the GCque */
+ while (mask && !error)
+ {
+ index2 = (BITS32) lowbit (mask);
+ mask &= ~index2;
+ pGC->stateChanges |= index2;
+ switch (index2)
+ {
+ case GCFunction:
+ {
+ CARD8 newalu;
+ NEXTVAL(CARD8, newalu);
+ if (newalu <= GXset)
+ pGC->alu = newalu;
+ else
+ {
+ if (client)
+ client->errorValue = newalu;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCPlaneMask:
+ NEXTVAL(unsigned long, pGC->planemask);
+ break;
+ case GCForeground:
+ NEXTVAL(unsigned long, pGC->fgPixel);
+ /*
+ * this is for CreateGC
+ */
+ if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+ {
+ pGC->tileIsPixel = TRUE;
+ pGC->tile.pixel = pGC->fgPixel;
+ }
+ break;
+ case GCBackground:
+ NEXTVAL(unsigned long, pGC->bgPixel);
+ break;
+ case GCLineWidth: /* ??? line width is a CARD16 */
+ NEXTVAL(CARD16, pGC->lineWidth);
+ break;
+ case GCLineStyle:
+ {
+ unsigned int newlinestyle;
+ NEXTVAL(unsigned int, newlinestyle);
+ if (newlinestyle <= LineDoubleDash)
+ pGC->lineStyle = newlinestyle;
+ else
+ {
+ if (client)
+ client->errorValue = newlinestyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCCapStyle:
+ {
+ unsigned int newcapstyle;
+ NEXTVAL(unsigned int, newcapstyle);
+ if (newcapstyle <= CapProjecting)
+ pGC->capStyle = newcapstyle;
+ else
+ {
+ if (client)
+ client->errorValue = newcapstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCJoinStyle:
+ {
+ unsigned int newjoinstyle;
+ NEXTVAL(unsigned int, newjoinstyle);
+ if (newjoinstyle <= JoinBevel)
+ pGC->joinStyle = newjoinstyle;
+ else
+ {
+ if (client)
+ client->errorValue = newjoinstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCFillStyle:
+ {
+ unsigned int newfillstyle;
+ NEXTVAL(unsigned int, newfillstyle);
+ if (newfillstyle <= FillOpaqueStippled)
+ pGC->fillStyle = newfillstyle;
+ else
+ {
+ if (client)
+ client->errorValue = newfillstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCFillRule:
+ {
+ unsigned int newfillrule;
+ NEXTVAL(unsigned int, newfillrule);
+ if (newfillrule <= WindingRule)
+ pGC->fillRule = newfillrule;
+ else
+ {
+ if (client)
+ client->errorValue = newfillrule;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCTile:
+ NEXT_PTR(PixmapPtr, pPixmap);
+ if ((pPixmap->drawable.depth != pGC->depth) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ }
+ else
+ {
+ pPixmap->refcnt++;
+ if (!pGC->tileIsPixel)
+ (* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+ pGC->tileIsPixel = FALSE;
+ pGC->tile.pixmap = pPixmap;
+ }
+ break;
+ case GCStipple:
+ NEXT_PTR(PixmapPtr, pPixmap);
+ if ((pPixmap->drawable.depth != 1) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ }
+ else
+ {
+ pPixmap->refcnt++;
+ if (pGC->stipple)
+ (* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+ pGC->stipple = pPixmap;
+ }
+ break;
+ case GCTileStipXOrigin:
+ NEXTVAL(INT16, pGC->patOrg.x);
+ break;
+ case GCTileStipYOrigin:
+ NEXTVAL(INT16, pGC->patOrg.y);
+ break;
+ case GCFont:
+ {
+ FontPtr pFont;
+ NEXT_PTR(FontPtr, pFont);
+ pFont->refcnt++;
+ if (pGC->font)
+ CloseFont(pGC->font, (Font)0);
+ pGC->font = pFont;
+ break;
+ }
+ case GCSubwindowMode:
+ {
+ unsigned int newclipmode;
+ NEXTVAL(unsigned int, newclipmode);
+ if (newclipmode <= IncludeInferiors)
+ pGC->subWindowMode = newclipmode;
+ else
+ {
+ if (client)
+ client->errorValue = newclipmode;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCGraphicsExposures:
+ {
+ unsigned int newge;
+ NEXTVAL(unsigned int, newge);
+ if (newge <= xTrue)
+ pGC->graphicsExposures = newge;
+ else
+ {
+ if (client)
+ client->errorValue = newge;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCClipXOrigin:
+ NEXTVAL(INT16, pGC->clipOrg.x);
+ break;
+ case GCClipYOrigin:
+ NEXTVAL(INT16, pGC->clipOrg.y);
+ break;
+ case GCClipMask:
+ NEXT_PTR(PixmapPtr, pPixmap);
+ if (pPixmap)
+ {
+ if ((pPixmap->drawable.depth != 1) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ break;
+ }
+ pPixmap->refcnt++;
+ }
+ (*pGC->funcs->ChangeClip)(pGC, pPixmap ? CT_PIXMAP : CT_NONE,
+ (pointer)pPixmap, 0);
+ break;
+ case GCDashOffset:
+ NEXTVAL(INT16, pGC->dashOffset);
+ break;
+ case GCDashList:
+ {
+ CARD8 newdash;
+ NEXTVAL(CARD8, newdash);
+ if (newdash == 4)
+ {
+ if (pGC->dash != DefaultDash)
+ {
+ free(pGC->dash);
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+ }
+ }
+ else if (newdash != 0)
+ {
+ unsigned char *dash;
+
+ dash = malloc(2 * sizeof(unsigned char));
+ if (dash)
+ {
+ if (pGC->dash != DefaultDash)
+ free(pGC->dash);
+ pGC->numInDashList = 2;
+ pGC->dash = dash;
+ dash[0] = newdash;
+ dash[1] = newdash;
+ }
+ else
+ error = BadAlloc;
+ }
+ else
+ {
+ if (client)
+ client->errorValue = newdash;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCArcMode:
+ {
+ unsigned int newarcmode;
+ NEXTVAL(unsigned int, newarcmode);
+ if (newarcmode <= ArcPieSlice)
+ pGC->arcMode = newarcmode;
+ else
+ {
+ if (client)
+ client->errorValue = newarcmode;
+ error = BadValue;
+ }
+ break;
+ }
+ default:
+ if (client)
+ client->errorValue = maskQ;
+ error = BadValue;
+ break;
+ }
+ } /* end while mask && !error */
+
+ if (pGC->fillStyle == FillTiled && pGC->tileIsPixel)
+ {
+ if (!CreateDefaultTile (pGC))
+ {
+ pGC->fillStyle = FillSolid;
+ error = BadAlloc;
+ }
+ }
+ (*pGC->funcs->ChangeGC)(pGC, maskQ);
+ return error;
+}
+
+#undef NEXTVAL
+#undef NEXT_PTR
+
+static const struct {
+ BITS32 mask;
+ RESTYPE type;
+ Mask access_mode;
+} xidfields[] = {
+ { GCTile, RT_PIXMAP, DixReadAccess },
+ { GCStipple, RT_PIXMAP, DixReadAccess },
+ { GCFont, RT_FONT, DixUseAccess },
+ { GCClipMask, RT_PIXMAP, DixReadAccess },
+};
+
+int
+ChangeGCXIDs(ClientPtr client, GC *pGC, BITS32 mask, CARD32 *pC32)
+{
+ ChangeGCVal vals[GCLastBit + 1];
+ int i;
+ if (mask & ~GCAllBits)
+ {
+ client->errorValue = mask;
+ return BadValue;
+ }
+ for (i = Ones(mask); i--; )
+ vals[i].val = pC32[i];
+ for (i = 0; i < sizeof(xidfields) / sizeof(*xidfields); ++i)
+ {
+ int offset, rc;
+ if (!(mask & xidfields[i].mask))
+ continue;
+ offset = Ones(mask & (xidfields[i].mask - 1));
+ if (xidfields[i].mask == GCClipMask && vals[offset].val == None)
+ {
+ vals[offset].ptr = NullPixmap;
+ continue;
+ }
+ rc = dixLookupResourceByType(&vals[offset].ptr, vals[offset].val,
+ xidfields[i].type, client, xidfields[i].access_mode);
+ if (rc != Success)
+ {
+ client->errorValue = vals[offset].val;
+ return rc;
+ }
+ }
+ return ChangeGC(client, pGC, mask, vals);
+}
+
+/* CreateGC(pDrawable, mask, pval, pStatus)
+ creates a default GC for the given drawable, using mask to fill
+ in any non-default values.
+ Returns a pointer to the new GC on success, NULL otherwise.
+ returns status of non-default fields in pStatus
+BUG:
+ should check for failure to create default tile
+
+*/
+GCPtr
+CreateGC(DrawablePtr pDrawable, BITS32 mask, XID *pval, int *pStatus,
+ XID gcid, ClientPtr client)
+{
+ GCPtr pGC;
+
+ pGC = dixAllocateObjectWithPrivates(GC, PRIVATE_GC);
+ if (!pGC)
+ {
+ *pStatus = BadAlloc;
+ return (GCPtr)NULL;
+ }
+
+ pGC->pScreen = pDrawable->pScreen;
+ pGC->depth = pDrawable->depth;
+ pGC->alu = GXcopy; /* dst <- src */
+ pGC->planemask = ~0;
+ pGC->serialNumber = GC_CHANGE_SERIAL_BIT;
+ pGC->funcs = 0;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcPieSlice;
+ pGC->tile.pixel = 0;
+ pGC->tile.pixmap = NullPixmap;
+ if (mask & GCForeground)
+ {
+ /*
+ * magic special case -- ChangeGC checks for this condition
+ * and snags the Foreground value to create a pseudo default-tile
+ */
+ pGC->tileIsPixel = FALSE;
+ }
+ else
+ {
+ pGC->tileIsPixel = TRUE;
+ }
+
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = TRUE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ pGC->clientClipType = CT_NONE;
+ pGC->clientClip = (pointer)NULL;
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+ pGC->dashOffset = 0;
+
+ /* use the default font and stipple */
+ pGC->font = defaultFont;
+ defaultFont->refcnt++;
+ pGC->stipple = pGC->pScreen->PixmapPerDepth[0];
+ pGC->stipple->refcnt++;
+
+ /* this is not a scratch GC */
+ pGC->scratch_inuse = FALSE;
+
+ /* security creation/labeling check */
+ *pStatus = XaceHook(XACE_RESOURCE_ACCESS, client, gcid, RT_GC, pGC,
+ RT_NONE, NULL, DixCreateAccess|DixSetAttrAccess);
+ if (*pStatus != Success)
+ goto out;
+
+ pGC->stateChanges = GCAllBits;
+ if (!(*pGC->pScreen->CreateGC)(pGC))
+ *pStatus = BadAlloc;
+ else if (mask)
+ *pStatus = ChangeGCXIDs(client, pGC, mask, pval);
+ else
+ *pStatus = Success;
+
+out:
+ if (*pStatus != Success)
+ {
+ if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+ pGC->tileIsPixel = TRUE; /* undo special case */
+ FreeGC(pGC, (XID)0);
+ pGC = (GCPtr)NULL;
+ }
+
+ return pGC;
+}
+
+static Bool
+CreateDefaultTile (GCPtr pGC)
+{
+ ChangeGCVal tmpval[3];
+ PixmapPtr pTile;
+ GCPtr pgcScratch;
+ xRectangle rect;
+ CARD16 w, h;
+
+ w = 1;
+ h = 1;
+ (*pGC->pScreen->QueryBestSize)(TileShape, &w, &h, pGC->pScreen);
+ pTile = (PixmapPtr)
+ (*pGC->pScreen->CreatePixmap)(pGC->pScreen,
+ w, h, pGC->depth, 0);
+ pgcScratch = GetScratchGC(pGC->depth, pGC->pScreen);
+ if (!pTile || !pgcScratch)
+ {
+ if (pTile)
+ (*pTile->drawable.pScreen->DestroyPixmap)(pTile);
+ if (pgcScratch)
+ FreeScratchGC(pgcScratch);
+ return FALSE;
+ }
+ tmpval[0].val = GXcopy;
+ tmpval[1].val = pGC->tile.pixel;
+ tmpval[2].val = FillSolid;
+ (void)ChangeGC(NullClient, pgcScratch, GCFunction | GCForeground | GCFillStyle, tmpval);
+ ValidateGC((DrawablePtr)pTile, pgcScratch);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = w;
+ rect.height = h;
+ (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pTile, pgcScratch, 1, &rect);
+ /* Always remember to free the scratch graphics context after use. */
+ FreeScratchGC(pgcScratch);
+
+ pGC->tileIsPixel = FALSE;
+ pGC->tile.pixmap = pTile;
+ return TRUE;
+}
+
+int
+CopyGC(GC *pgcSrc, GC *pgcDst, BITS32 mask)
+{
+ BITS32 index2;
+ BITS32 maskQ;
+ int error = 0;
+
+ if (pgcSrc == pgcDst)
+ return Success;
+ pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ pgcDst->stateChanges |= mask;
+ maskQ = mask;
+ while (mask)
+ {
+ index2 = (BITS32) lowbit (mask);
+ mask &= ~index2;
+ switch (index2)
+ {
+ case GCFunction:
+ pgcDst->alu = pgcSrc->alu;
+ break;
+ case GCPlaneMask:
+ pgcDst->planemask = pgcSrc->planemask;
+ break;
+ case GCForeground:
+ pgcDst->fgPixel = pgcSrc->fgPixel;
+ break;
+ case GCBackground:
+ pgcDst->bgPixel = pgcSrc->bgPixel;
+ break;
+ case GCLineWidth:
+ pgcDst->lineWidth = pgcSrc->lineWidth;
+ break;
+ case GCLineStyle:
+ pgcDst->lineStyle = pgcSrc->lineStyle;
+ break;
+ case GCCapStyle:
+ pgcDst->capStyle = pgcSrc->capStyle;
+ break;
+ case GCJoinStyle:
+ pgcDst->joinStyle = pgcSrc->joinStyle;
+ break;
+ case GCFillStyle:
+ pgcDst->fillStyle = pgcSrc->fillStyle;
+ break;
+ case GCFillRule:
+ pgcDst->fillRule = pgcSrc->fillRule;
+ break;
+ case GCTile:
+ {
+ if (EqualPixUnion(pgcDst->tileIsPixel,
+ pgcDst->tile,
+ pgcSrc->tileIsPixel,
+ pgcSrc->tile))
+ {
+ break;
+ }
+ if (!pgcDst->tileIsPixel)
+ (* pgcDst->pScreen->DestroyPixmap)(pgcDst->tile.pixmap);
+ pgcDst->tileIsPixel = pgcSrc->tileIsPixel;
+ pgcDst->tile = pgcSrc->tile;
+ if (!pgcDst->tileIsPixel)
+ pgcDst->tile.pixmap->refcnt++;
+ break;
+ }
+ case GCStipple:
+ {
+ if (pgcDst->stipple == pgcSrc->stipple)
+ break;
+ if (pgcDst->stipple)
+ (* pgcDst->pScreen->DestroyPixmap)(pgcDst->stipple);
+ pgcDst->stipple = pgcSrc->stipple;
+ if (pgcDst->stipple)
+ pgcDst->stipple->refcnt ++;
+ break;
+ }
+ case GCTileStipXOrigin:
+ pgcDst->patOrg.x = pgcSrc->patOrg.x;
+ break;
+ case GCTileStipYOrigin:
+ pgcDst->patOrg.y = pgcSrc->patOrg.y;
+ break;
+ case GCFont:
+ if (pgcDst->font == pgcSrc->font)
+ break;
+ if (pgcDst->font)
+ CloseFont(pgcDst->font, (Font)0);
+ if ((pgcDst->font = pgcSrc->font) != NullFont)
+ (pgcDst->font)->refcnt++;
+ break;
+ case GCSubwindowMode:
+ pgcDst->subWindowMode = pgcSrc->subWindowMode;
+ break;
+ case GCGraphicsExposures:
+ pgcDst->graphicsExposures = pgcSrc->graphicsExposures;
+ break;
+ case GCClipXOrigin:
+ pgcDst->clipOrg.x = pgcSrc->clipOrg.x;
+ break;
+ case GCClipYOrigin:
+ pgcDst->clipOrg.y = pgcSrc->clipOrg.y;
+ break;
+ case GCClipMask:
+ (* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
+ break;
+ case GCDashOffset:
+ pgcDst->dashOffset = pgcSrc->dashOffset;
+ break;
+ case GCDashList:
+ if (pgcSrc->dash == DefaultDash)
+ {
+ if (pgcDst->dash != DefaultDash)
+ {
+ free(pgcDst->dash);
+ pgcDst->numInDashList = pgcSrc->numInDashList;
+ pgcDst->dash = pgcSrc->dash;
+ }
+ }
+ else
+ {
+ unsigned char *dash;
+ unsigned int i;
+
+ dash = malloc(pgcSrc->numInDashList * sizeof(unsigned char));
+ if (dash)
+ {
+ if (pgcDst->dash != DefaultDash)
+ free(pgcDst->dash);
+ pgcDst->numInDashList = pgcSrc->numInDashList;
+ pgcDst->dash = dash;
+ for (i=0; i<pgcSrc->numInDashList; i++)
+ dash[i] = pgcSrc->dash[i];
+ }
+ else
+ error = BadAlloc;
+ }
+ break;
+ case GCArcMode:
+ pgcDst->arcMode = pgcSrc->arcMode;
+ break;
+ default:
+ FatalError ("CopyGC: Unhandled mask!\n");
+ }
+ }
+ if (pgcDst->fillStyle == FillTiled && pgcDst->tileIsPixel)
+ {
+ if (!CreateDefaultTile (pgcDst))
+ {
+ pgcDst->fillStyle = FillSolid;
+ error = BadAlloc;
+ }
+ }
+ (*pgcDst->funcs->CopyGC) (pgcSrc, maskQ, pgcDst);
+ return error;
+}
+
+/**
+ * does the diX part of freeing the characteristics in the GC.
+ *
+ * \param value must conform to DeleteType
+ */
+int
+FreeGC(pointer value, XID gid)
+{
+ GCPtr pGC = (GCPtr)value;
+
+ CloseFont(pGC->font, (Font)0);
+ (* pGC->funcs->DestroyClip)(pGC);
+
+ if (!pGC->tileIsPixel)
+ (* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+ if (pGC->stipple)
+ (* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+
+ (*pGC->funcs->DestroyGC) (pGC);
+ if (pGC->dash != DefaultDash)
+ free(pGC->dash);
+ dixFreeObjectWithPrivates(pGC, PRIVATE_GC);
+ return Success;
+}
+
+/* CreateScratchGC(pScreen, depth)
+ like CreateGC, but doesn't do the default tile or stipple,
+since we can't create them without already having a GC. any code
+using the tile or stipple has to set them explicitly anyway,
+since the state of the scratch gc is unknown. This is OK
+because ChangeGC() has to be able to deal with NULL tiles and
+stipples anyway (in case the CreateGC() call has provided a
+value for them -- we can't set the default tile until the
+client-supplied attributes are installed, since the fgPixel
+is what fills the default tile. (maybe this comment should
+go with CreateGC() or ChangeGC().)
+*/
+
+static GCPtr
+CreateScratchGC(ScreenPtr pScreen, unsigned depth)
+{
+ GCPtr pGC;
+
+ pGC = dixAllocateObjectWithPrivates(GC, PRIVATE_GC);
+ if (!pGC)
+ return (GCPtr)NULL;
+
+ pGC->pScreen = pScreen;
+ pGC->depth = depth;
+ pGC->alu = GXcopy; /* dst <- src */
+ pGC->planemask = ~0;
+ pGC->serialNumber = 0;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcPieSlice;
+ pGC->font = defaultFont;
+ if ( pGC->font) /* necessary, because open of default font could fail */
+ pGC->font->refcnt++;
+ pGC->tileIsPixel = TRUE;
+ pGC->tile.pixel = 0;
+ pGC->tile.pixmap = NullPixmap;
+ pGC->stipple = NullPixmap;
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = TRUE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ pGC->clientClipType = CT_NONE;
+ pGC->dashOffset = 0;
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+
+ /* scratch GCs in the GCperDepth pool start off unused */
+ pGC->scratch_inuse = FALSE;
+
+ pGC->stateChanges = GCAllBits;
+ if (!(*pScreen->CreateGC)(pGC))
+ {
+ FreeGC(pGC, (XID)0);
+ pGC = (GCPtr)NULL;
+ }
+ return pGC;
+}
+
+void
+FreeGCperDepth(int screenNum)
+{
+ int i;
+ ScreenPtr pScreen;
+ GCPtr *ppGC;
+
+ pScreen = screenInfo.screens[screenNum];
+ ppGC = pScreen->GCperDepth;
+
+ for (i = 0; i <= pScreen->numDepths; i++)
+ {
+ (void)FreeGC(ppGC[i], (XID)0);
+ ppGC[i] = NULL;
+ }
+}
+
+
+Bool
+CreateGCperDepth(int screenNum)
+{
+ int i;
+ ScreenPtr pScreen;
+ DepthPtr pDepth;
+ GCPtr *ppGC;
+
+ pScreen = screenInfo.screens[screenNum];
+ ppGC = pScreen->GCperDepth;
+ /* do depth 1 separately because it's not included in list */
+ if (!(ppGC[0] = CreateScratchGC(pScreen, 1)))
+ return FALSE;
+ ppGC[0]->graphicsExposures = FALSE;
+ /* Make sure we don't overflow GCperDepth[] */
+ if( pScreen->numDepths > MAXFORMATS )
+ return FALSE;
+
+ pDepth = pScreen->allowedDepths;
+ for (i=0; i<pScreen->numDepths; i++, pDepth++)
+ {
+ if (!(ppGC[i+1] = CreateScratchGC(pScreen, pDepth->depth)))
+ {
+ for (; i >= 0; i--)
+ (void)FreeGC(ppGC[i], (XID)0);
+ return FALSE;
+ }
+ ppGC[i+1]->graphicsExposures = FALSE;
+ }
+ return TRUE;
+}
+
+Bool
+CreateDefaultStipple(int screenNum)
+{
+ ScreenPtr pScreen;
+ ChangeGCVal tmpval[3];
+ xRectangle rect;
+ CARD16 w, h;
+ GCPtr pgcScratch;
+
+ pScreen = screenInfo.screens[screenNum];
+
+ w = 16;
+ h = 16;
+ (* pScreen->QueryBestSize)(StippleShape, &w, &h, pScreen);
+ if (!(pScreen->PixmapPerDepth[0] =
+ (*pScreen->CreatePixmap)(pScreen, w, h, 1, 0)))
+ return FALSE;
+ /* fill stipple with 1 */
+ tmpval[0].val = GXcopy;
+ tmpval[1].val = 1;
+ tmpval[2].val = FillSolid;
+ pgcScratch = GetScratchGC(1, pScreen);
+ if (!pgcScratch)
+ {
+ (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+ return FALSE;
+ }
+ (void)ChangeGC(NullClient, pgcScratch, GCFunction|GCForeground|GCFillStyle, tmpval);
+ ValidateGC((DrawablePtr)pScreen->PixmapPerDepth[0], pgcScratch);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = w;
+ rect.height = h;
+ (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pScreen->PixmapPerDepth[0],
+ pgcScratch, 1, &rect);
+ FreeScratchGC(pgcScratch);
+ return TRUE;
+}
+
+void
+FreeDefaultStipple(int screenNum)
+{
+ ScreenPtr pScreen = screenInfo.screens[screenNum];
+ (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+}
+
+int
+SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash)
+{
+ long i;
+ unsigned char *p, *indash;
+ BITS32 maskQ = 0;
+
+ i = ndash;
+ p = pdash;
+ while (i--)
+ {
+ if (!*p++)
+ {
+ /* dash segment must be > 0 */
+ return BadValue;
+ }
+ }
+
+ if (ndash & 1)
+ p = malloc(2 * ndash * sizeof(unsigned char));
+ else
+ p = malloc(ndash * sizeof(unsigned char));
+ if (!p)
+ return BadAlloc;
+
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ if (offset != pGC->dashOffset)
+ {
+ pGC->dashOffset = offset;
+ pGC->stateChanges |= GCDashOffset;
+ maskQ |= GCDashOffset;
+ }
+
+ if (pGC->dash != DefaultDash)
+ free(pGC->dash);
+ pGC->numInDashList = ndash;
+ pGC->dash = p;
+ if (ndash & 1)
+ {
+ pGC->numInDashList += ndash;
+ indash = pdash;
+ i = ndash;
+ while (i--)
+ *p++ = *indash++;
+ }
+ while(ndash--)
+ *p++ = *pdash++;
+ pGC->stateChanges |= GCDashList;
+ maskQ |= GCDashList;
+
+ if (pGC->funcs->ChangeGC)
+ (*pGC->funcs->ChangeGC) (pGC, maskQ);
+ return Success;
+}
+
+int
+VerifyRectOrder(int nrects, xRectangle *prects, int ordering)
+{
+ xRectangle *prectP, *prectN;
+ int i;
+
+ switch(ordering)
+ {
+ case Unsorted:
+ return CT_UNSORTED;
+ case YSorted:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if(prectN->y < prectP->y)
+ return -1;
+ }
+ return CT_YSORTED;
+ case YXSorted:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if((prectN->y < prectP->y) ||
+ ( (prectN->y == prectP->y) &&
+ (prectN->x < prectP->x) ) )
+ return -1;
+ }
+ return CT_YXSORTED;
+ case YXBanded:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if((prectN->y != prectP->y &&
+ prectN->y < prectP->y + (int) prectP->height) ||
+ ((prectN->y == prectP->y) &&
+ (prectN->height != prectP->height ||
+ prectN->x < prectP->x + (int) prectP->width)))
+ return -1;
+ }
+ return CT_YXBANDED;
+ }
+ return -1;
+}
+
+int
+SetClipRects(GCPtr pGC, int xOrigin, int yOrigin, int nrects,
+ xRectangle *prects, int ordering)
+{
+ int newct, size;
+ xRectangle *prectsNew;
+
+ newct = VerifyRectOrder(nrects, prects, ordering);
+ if (newct < 0)
+ return BadMatch;
+ size = nrects * sizeof(xRectangle);
+ prectsNew = malloc(size);
+ if (!prectsNew && size)
+ return BadAlloc;
+
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ pGC->clipOrg.x = xOrigin;
+ pGC->stateChanges |= GCClipXOrigin;
+
+ pGC->clipOrg.y = yOrigin;
+ pGC->stateChanges |= GCClipYOrigin;
+
+ if (size)
+ memmove((char *)prectsNew, (char *)prects, size);
+ (*pGC->funcs->ChangeClip)(pGC, newct, (pointer)prectsNew, nrects);
+ if (pGC->funcs->ChangeGC)
+ (*pGC->funcs->ChangeGC) (pGC, GCClipXOrigin|GCClipYOrigin|GCClipMask);
+ return Success;
+}
+
+
+/*
+ sets reasonable defaults
+ if we can get a pre-allocated one, use it and mark it as used.
+ if we can't, create one out of whole cloth (The Velveteen GC -- if
+ you use it often enough it will become real.)
+*/
+GCPtr
+GetScratchGC(unsigned depth, ScreenPtr pScreen)
+{
+ int i;
+ GCPtr pGC;
+
+ for (i=0; i<=pScreen->numDepths; i++)
+ {
+ pGC = pScreen->GCperDepth[i];
+ if (pGC && pGC->depth == depth && !pGC->scratch_inuse)
+ {
+ pGC->scratch_inuse = TRUE;
+
+ pGC->alu = GXcopy;
+ pGC->planemask = ~0;
+ pGC->serialNumber = 0;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcChord;
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = FALSE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ if (pGC->clientClipType != CT_NONE)
+ (*pGC->funcs->ChangeClip) (pGC, CT_NONE, NULL, 0);
+ pGC->stateChanges = GCAllBits;
+ return pGC;
+ }
+ }
+ /* if we make it this far, need to roll our own */
+ pGC = CreateScratchGC(pScreen, depth);
+ if (pGC)
+ pGC->graphicsExposures = FALSE;
+ return pGC;
+}
+
+/*
+ if the gc to free is in the table of pre-existing ones,
+mark it as available.
+ if not, free it for real
+*/
+void
+FreeScratchGC(GCPtr pGC)
+{
+ if (pGC->scratch_inuse)
+ pGC->scratch_inuse = FALSE;
+ else
+ FreeGC(pGC, (GContext)0);
+}
contact: Jan Huwald // Impressum