Up
mp3butcher wrote:
> Here's a small patch adressing win32 problem
>
> Don't know how to "link"
> osg/Program #ifndef GL_ARB_transform_feedback2
> with
> osg/GLExtensions isTransformFeedbackSupported =
> osg::isGLExtensionSupported(contextID, "GL_ARB_transform_feedback2");
>
>
>
> Code:
>
> Index: include/osg/GLExtensions
> ===================================================================
> --- include/osg/GLExtensions (révision 14654)
> +++ include/osg/GLExtensions (copie de travail)
> @@ -315,6 +315,8 @@
> bool isBufferObjectSupported;
> bool isPBOSupported;
> bool isTBOSupported;
> + bool isVAOSupported;
> + bool isTransformFeedbackSupported;
>
> void (GL_APIENTRY * glGenBuffers) (GLsizei n, GLuint *buffers);
> void (GL_APIENTRY * glBindBuffer) (GLenum target, GLuint buffer);
> Index: include/osg/Program
> ===================================================================
> --- include/osg/Program (révision 14654)
> +++ include/osg/Program (copie de travail)
> @@ -16,6 +16,7 @@
> /* file: include/osg/Program
> * author: Mike Weiblen 2008-01-02
> * Holger Helmich 2010-10-21
> + * Julien Valentin 2015-01-09
> */
>
> #ifndef OSG_PROGRAM
> @@ -31,6 +32,12 @@
> #include <osg/Shader>
> #include <osg/StateAttribute>
>
> +#ifndef GL_ARB_transform_feedback2
> + #define GL_RASTERIZER_DISCARD 0x8C89
> + #define GL_INTERLEAVED_ATTRIBS 0x8C8C
> + #define GL_SEPARATE_ATTRIBS 0x8C8D
> +#endif
> +
> namespace osg {
>
> class State;
> Index: src/osg/GLExtensions.cpp
> ===================================================================
> --- src/osg/GLExtensions.cpp (révision 14654)
> +++ src/osg/GLExtensions.cpp (copie de travail)
> @@ -678,8 +678,9 @@
> setGLExtensionFuncPtr(glTexBuffer, "glTexBuffer","glTexBufferARB" );
>
> isPBOSupported = OSG_GL3_FEATURES ||
> osg::isGLExtensionSupported(contextID,"GL_ARB_pixel_buffer_object");
> isUniformBufferObjectSupported = osg::isGLExtensionSupported(contextID,
> "GL_ARB_uniform_buffer_object");
> isTBOSupported =
> osg::isGLExtensionSupported(contextID,"GL_ARB_texture_buffer_object");
> + isVAOSupported = osg::isGLExtensionSupported(contextID,
> "GL_ARB_vertex_array_object");
> + isTransformFeedbackSupported = osg::isGLExtensionSupported(contextID,
> "GL_ARB_transform_feedback2");
>
>
>
>
>
> PS:reading the specs again
> https://www.opengl.org/registry/specs/ARB/transform_feedback2.txt
> https://www.opengl.org/registry/specs/ARB/transform_feedback3.txt
> I have doubts about portability with no AMD/NVIDIA GTX "big" cards.
> Would require users feedback from exotic driver...
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=62337#62337
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