View Full Version : GLEW 'bug' in glslang extensions

02-29-2004, 03:21 AM
This only affects to cards that having fragment/vertex_shader extensions, haven't fragment/vertex_program.
GLEW open this funcion pointers (glVertexAttribPointerARB, glEnableVertexAttribArrayARB and glBindAttribLocationARB) in the vp/fp_program extensions, so if your card havent these extensions (as 3DLabs WildCat VP cards), you will get an error for null function pointer if you try to use it.

03-01-2004, 09:28 AM
I am not exactly sure what you are saying here? Do you have a code sample or something that shows this?

Axel Mamode
03-01-2004, 09:49 AM
I think he is saying that the entrypoints that are shared between the extensions ARB_vertex_shader and ARB_vertex_program (e.g. glVertexAttrib4f) are not supplied by glew if ARB_vertex_program is not present but ARB_vertex_shader is.
Essentially, both extensions describe the same entrypoints, but glew gets them from ARB_vertex_program only.

03-01-2004, 12:22 PM
Yes, this is what happens exactly. This entry points are only in GL_ARB_vertex_program, but aren't in GL_ARB_vertex_shader.

Sorry for my bad english please http://www.opengl.org/discussion_boards/ubb/smile.gif