1 files changed, 82 insertions, 0 deletions
diff --git a/patches/OpenCSG-1.1.0-Reset-Hack.patch b/patches/OpenCSG-1.1.0-Reset-Hack.patch
new file mode 100644
index 0000000..493a11b
--- /dev/null
+++ b/patches/OpenCSG-1.1.0-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