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Opengl driver bug with retrieving shader binaries.

Question asked by lukcho on Aug 3, 2012
Latest reply on Sep 5, 2012 by lukcho

A program object that is successfully linked BUT has it's shaders detached  can not be queried about it's binary - glGetProgramiv(prog, GL_PROGRAM_BINARY_LENGTH, &v) gives 0. Otherwise the program object works for rendering.

If the shaders are kept attached, then all works - the program obj is usable for rendering and the binary is retrievable.

This is a bug because, except for the linking, the attached shaders (or their lack thereof) should have no other effects on the program object. In particular they should not affect the binary.

 

I attached some simplified win32-based code that shows the bug.

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