From 0cd451bbf9ea2bf69a1ed7e15ba1814a196cb0c5 Mon Sep 17 00:00:00 2001
From: clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c>
Date: Wed, 28 Oct 2009 20:11:56 +0000
Subject: Clifford Wolf: 	Added MDI support

git-svn-id: http://svn.clifford.at/openscad/trunk@124 b57f626f-c46c-0410-a088-ec61d464b74c

diff --git a/OpenCSG-Reset-Hack.patch b/OpenCSG-Reset-Hack.patch
new file mode 100644
index 0000000..4968707
--- /dev/null
+++ b/OpenCSG-Reset-Hack.patch
@@ -0,0 +1,82 @@
+diff --git a/include/opencsg.h b/include/opencsg.h
+index daecacc..ffde239 100644
+--- a/include/opencsg.h
++++ b/include/opencsg.h
+@@ -188,6 +188,9 @@ namespace OpenCSG {
+                 Algorithm = AlgorithmUnused, 
+                 DepthComplexityAlgorithm = NoDepthComplexitySampling);
+ 
++    // call this function whenever switching the OpenGL context
++    void reset();
++
+ } // namespace OpenCSG
+ 
+ #endif // __OpenCSG__opencsg_h__
+diff --git a/src/channelManager.h b/src/channelManager.h
+index ecd5a1d..0e1458a 100644
+--- a/src/channelManager.h
++++ b/src/channelManager.h
+@@ -79,9 +79,9 @@ namespace OpenCSG {
+         /// moved into alpha, to allow alpha testing of the channel.
+         static void setupTexEnv(Channel channel);
+ 
+-    private:
+-
+         static OpenGL::OffscreenBuffer* gOffscreenBuffer;
++
++    private:
+         static int gOffscreenType;
+         static bool gInUse;
+ 
+diff --git a/src/offscreenBuffer.cpp b/src/offscreenBuffer.cpp
+index e02dd83..4f978d5 100644
+--- a/src/offscreenBuffer.cpp
++++ b/src/offscreenBuffer.cpp
+@@ -22,19 +22,41 @@
+ #include "offscreenBuffer.h"
+ #include "frameBufferObject.h"
+ #include "pBufferTexture.h"
++#include "channelManager.h"
++
++static bool reset_f = false;
++static bool reset_p = false;
+ 
+ namespace OpenCSG {
+ 
++    void reset()
++    {
++	reset_f = true;
++	reset_p = true;
++	OpenCSG::ChannelManager::gOffscreenBuffer = NULL;
++    }
++
+     namespace OpenGL {
+ 
+         OffscreenBuffer* getOffscreenBuffer(bool fbo) {
+-            static FrameBufferObject* f = new FrameBufferObject;
+-            static PBufferTexture* p = new PBufferTexture;
+-            
+-            if (fbo)
+-                return f;
+-            else 
++            static FrameBufferObject* f = NULL;
++            static PBufferTexture* p = NULL;
++
++	    if (fbo) {
++	        if (reset_f || f == NULL) {
++	            delete f;
++	            f = new FrameBufferObject;
++	            reset_f = false;
++	        }
++		return f;
++	    } else {
++	        if (reset_p || p == NULL) {
++	            delete p;
++	            p = new PBufferTexture;
++	            reset_p = false;
++	        }
+                 return p;
++	    }
+         }
+ 
+     } // namespace OpenGL
diff --git a/mainwin.cc b/mainwin.cc
index f28e679..08e1ce6 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -240,6 +240,11 @@ MainWindow::MainWindow(const char *filename)
 	viewModeThrownTogether();
 	show();
 
+	// make sure it looks nice..
+	resize(800, 600);
+	s1->setSizes(QList<int>() << 400 << 400);
+	s2->setSizes(QList<int>() << 400 << 200);
+
 #ifdef ENABLE_OPENCSG
 	viewModeOpenCSG();
 #else
@@ -520,9 +525,13 @@ fail:
 
 void MainWindow::actionNew()
 {
+#if ENABLE_MDI
+	new MainWindow;
+#else
 	filename = QString();
 	setWindowTitle("New Document");
 	editor->setPlainText("");
+#endif
 }
 
 void MainWindow::actionOpen()
@@ -531,6 +540,13 @@ void MainWindow::actionOpen()
 	QString new_filename = QFileDialog::getOpenFileName(this, "Open File", "", "OpenSCAD Designs (*.scad)");
 	if (!new_filename.isEmpty())
 	{
+#if ENABLE_MDI
+		if (!editor->toPlainText().isEmpty()) {
+			new MainWindow(new_filename.toAscii().data());
+			current_win = NULL;
+			return;
+		}
+#endif
 		filename = new_filename;
 		maybe_change_dir();
 		setWindowTitle(filename);
@@ -989,6 +1005,9 @@ static void renderGLviaOpenCSG(void *vp)
 		glew_initialized = 1;
 		glewInit();
 	}
+#ifdef ENABLE_MDI
+	OpenCSG::reset();
+#endif
 	if (m->root_chain) {
 		GLint *shaderinfo = m->screen->shaderinfo;
 		if (!shaderinfo[0])
diff --git a/openscad.cc b/openscad.cc
index 8dd7650..fc9efc8 100644
--- a/openscad.cc
+++ b/openscad.cc
@@ -112,8 +112,10 @@ int main(int argc, char **argv)
 	if (optind < argc)
 		filename = argv[optind++];
 
+#ifndef ENABLE_MDI
 	if (optind != argc)
 		help(argv[0]);
+#endif
 
 	if (stl_output_file || off_output_file)
 	{
@@ -203,14 +205,14 @@ int main(int argc, char **argv)
 		if (filename)
 			m = new MainWindow(filename);
 		else
-			m = new MainWindow();
-
-		m->show();
-		m->resize(800, 600);
-		m->s1->setSizes(QList<int>() << 400 << 400);
-		m->s2->setSizes(QList<int>() << 400 << 200);
-
+			m = new MainWindow;
+#ifdef ENABLE_MDI
+		while (optind < argc)
+			new MainWindow(argv[optind++]);
+		app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()));
+#else
 		app.connect(m, SIGNAL(destroyed()), &app, SLOT(quit()));
+#endif
 		rc = app.exec();
 	}
 	else
diff --git a/openscad.pro b/openscad.pro
index ee60724..c7ea413 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -9,6 +9,9 @@ else {
 CONFIG += qt debug
 TEMPLATE = app
 
+# MDI needs an OpenCSG library that is compiled with OpenCSG-Reset-Hack.patch applied
+# DEFINES += "ENABLE_MDI=1"
+
 DEFINES += "ENABLE_CGAL=1"
 LIBS += -lCGAL
 
@@ -40,7 +43,7 @@ SOURCES += import.cc dxfdata.cc dxftess.cc dxfdim.cc
 SOURCES += dxflinextrude.cc dxfrotextrude.cc
 
 QMAKE_CXXFLAGS += -O0
-// QMAKE_CXXFLAGS += -O3 -march=pentium
+# QMAKE_CXXFLAGS += -O3 -march=pentium
 
 QT += opengl
 
-- 
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