Patch to allow OpenCSG to render into an FBO instead of into the system-provided framebuffer

2 files changed, 83 insertions, 1 deletions

diff --git a/patches/OpenCSG-1.3.0-FBO.patch b/patches/OpenCSG-1.3.0-FBO.patch
new file mode 100644
index 0000000..150a12e
--- /dev/null
+++ b/patches/OpenCSG-1.3.0-FBO.patch
@@ -0,0 +1,80 @@
+diff -ru OpenCSG-1.3.0/src/frameBufferObject.cpp OpenCSG-1.3.0-fbofix/src/frameBufferObject.cpp
+--- OpenCSG-1.3.0/src/frameBufferObject.cpp	2010-02-06 21:35:10.000000000 +0100
++++ OpenCSG-1.3.0-fbofix/src/frameBufferObject.cpp	2011-08-02 01:33:31.000000000 +0200
+@@ -57,6 +57,7 @@
+             glGenRenderbuffers(1, &depthID); 
+             glGenTextures(1, &textureID);
+ 
++            glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFramebufferID);
+             glBindFramebuffer(GL_FRAMEBUFFER, framebufferID);
+             glBindTexture(GL_TEXTURE_2D, textureID);
+             glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_INT, 0);
+@@ -76,7 +77,7 @@
+                 return false;
+             }
+ 
+-            glBindFramebuffer(GL_FRAMEBUFFER, 0);
++            glBindFramebuffer(GL_FRAMEBUFFER, oldFramebufferID);
+             glBindTexture(GL_TEXTURE_2D, 0);
+ 
+             textureTarget = GL_TEXTURE_2D;
+@@ -133,7 +134,7 @@
+         // Unbinds frame buffer texture.
+         bool FrameBufferObject::EndCapture()
+         {
+-            glBindFramebuffer(GL_FRAMEBUFFER, 0);
++            glBindFramebuffer(GL_FRAMEBUFFER, oldFramebufferID);
+             return true;
+         }
+ 
+diff -ru OpenCSG-1.3.0/src/frameBufferObject.h OpenCSG-1.3.0-fbofix/src/frameBufferObject.h
+--- OpenCSG-1.3.0/src/frameBufferObject.h	2011-08-02 17:30:01.000000000 +0200
++++ OpenCSG-1.3.0-fbofix/src/frameBufferObject.h	2011-08-02 01:32:58.000000000 +0200
+@@ -83,6 +83,7 @@
+             unsigned int depthID;
+ 
+             unsigned int framebufferID;
++            int oldFramebufferID;
+ 
+             bool         initialized;
+         };
+diff -ru OpenCSG-1.3.0/src/frameBufferObjectExt.cpp OpenCSG-1.3.0-fbofix/src/frameBufferObjectExt.cpp
+--- OpenCSG-1.3.0/src/frameBufferObjectExt.cpp	2010-02-06 21:35:10.000000000 +0100
++++ OpenCSG-1.3.0-fbofix/src/frameBufferObjectExt.cpp	2011-08-02 01:33:46.000000000 +0200
+@@ -58,6 +58,7 @@
+             glGenRenderbuffersEXT(1, &depthID); 
+             glGenTextures(1, &textureID);
+ 
++            glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &oldFramebufferID);
+             glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebufferID);	
+             glBindTexture(GL_TEXTURE_2D, textureID);
+             glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_INT, 0);
+@@ -77,7 +78,7 @@
+                 return false;
+             }
+ 
+-            glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
++            glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, oldFramebufferID);
+             glBindTexture(GL_TEXTURE_2D, 0);
+ 
+             textureTarget = GL_TEXTURE_2D;
+@@ -134,7 +135,7 @@
+         // Unbinds frame buffer texture.
+         bool FrameBufferObjectExt::EndCapture()
+         {
+-            glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
++            glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, oldFramebufferID);
+             return true;
+         }
+ 
+diff -ru OpenCSG-1.3.0/src/frameBufferObjectExt.h OpenCSG-1.3.0-fbofix/src/frameBufferObjectExt.h
+--- OpenCSG-1.3.0/src/frameBufferObjectExt.h	2010-02-06 21:35:10.000000000 +0100
++++ OpenCSG-1.3.0-fbofix/src/frameBufferObjectExt.h	2011-08-02 01:33:08.000000000 +0200
+@@ -83,6 +83,7 @@
+             unsigned int depthID;
+ 
+             unsigned int framebufferID;
++            int oldFramebufferID;
+ 
+             bool         initialized;
+         };
diff --git a/patches/OpenCSG-1.3.0-MacOSX-port.patch b/patches/OpenCSG-1.3.0-MacOSX-port.patch
index bb55165..e8eaa92 100644
--- a/patches/OpenCSG-1.3.0-MacOSX-port.patch
+++ b/patches/OpenCSG-1.3.0-MacOSX-port.patch
@@ -1102,7 +1102,7 @@ diff -ru OpenCSG-1.3.0/src/channelManager.cpp OpenCSG-1.3.0-mac/src/channelManag
 diff -ru OpenCSG-1.3.0/src/frameBufferObject.h OpenCSG-1.3.0-mac/src/frameBufferObject.h
 --- OpenCSG-1.3.0/src/frameBufferObject.h	2010-02-06 21:35:10.000000000 +0100
 +++ OpenCSG-1.3.0-mac/src/frameBufferObject.h	2010-05-09 02:51:36.000000000 +0200
-@@ -79,10 +79,10 @@
+@@ -79,11 +79,11 @@
  
              /// Texture stuff
              GLenum       textureTarget;
@@ -1112,7 +1112,9 @@ diff -ru OpenCSG-1.3.0/src/frameBufferObject.h OpenCSG-1.3.0-mac/src/frameBuffer
 +            GLuint depthID;
  
 -            unsigned int framebufferID;
+-            int oldFramebufferID;
 +            GLuint framebufferID;
++            GLint oldFramebufferID;
  
              bool         initialized;
          };