BufferOverflowException in the JSR-231 renderer

[Amos Wenger]

I get this exception when launching Lesson37 tests in the xith-tk (cel-shading) :

No Fragment Program support, skipping
java.nio.BufferOverflowException
   at java.nio.Buffer.nextPutIndex(Buffer.java:419)
   at java.nio.DirectIntBufferU.put(DirectIntBufferU.java:245)
   at com.xith3d.render.jsr231.VertexProgramShaderPeer.bindShaderProgram(VertexProgramShaderPeer.java:110)
   at com.xith3d.render.jsr231.VertexProgramShaderPeer.setShaderProgramState(VertexProgramShaderPeer.java:169)
   at com.xith3d.render.jsr231.VertexProgramShaderPeer.shade(VertexProgramShaderPeer.java:183)
   at com.xith3d.render.CanvasPeerBase.setState(CanvasPeerBase.java:121)
   at com.xith3d.render.CanvasPeerBase.render(CanvasPeerBase.java:99)
   at com.xith3d.render.jsr231.CanvasPeerImpl.drawBin(CanvasPeerImpl.java:838)
   at com.xith3d.render.jsr231.CanvasPeerImpl.display(CanvasPeerImpl.java:1073)
   at com.sun.opengl.impl.GLDrawableHelper.display(GLDrawableHelper.java:77)
   at javax.media.opengl.GLCanvas$DisplayAction.run(GLCanvas.java:262)
   at com.sun.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:128)
   at javax.media.opengl.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:279)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
   at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)


Do you (lilian ?) have an idea where it comes from and how to fix it ?

[gniliak]

It seems in function "private void bindShaderProgram(GL gl, VertexProgram shaderProgram, CanvasPeer canvas)" in VertexProgramShaderPeer (line 109):

if ((spHandle != -1) && shaderProgram.isDirty()) {
               // handleBuffer.rewind();   // -- It is needed to rewind the buffer here.
               handleBuffer.put(spHandle);
               handleBuffer.rewind();

                .................

Hope it is helpful.

[Amos Wenger]

Actually I have no problem knowing which line is it but how to fix it...

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[Amos Wenger]

* bump * Lilian, any news ? Or do I have to read the whole JSR-231 myself ? 

[Amos Wenger]

It seems in function "private void bindShaderProgram(GL gl, VertexProgram shaderProgram, CanvasPeer canvas)" in VertexProgramShaderPeer (line 109):

if ((spHandle != -1) && shaderProgram.isDirty()) {
               // handleBuffer.rewind();   // -- It is needed to rewind the buffer here.
               handleBuffer.put(spHandle);
               handleBuffer.rewind();

                .................

Hope it is helpful.

Sorry guy I didn't read carefully your answer. I did as you suggested and it works perfectly ! Many thanks ! Now CellShading's on the way... (And BTW thanks also to c_lilian).