BindingGenerator conflates core and extension constants

[numberZero]

BindingGenerator conflates constant names with different vendor suffixes. But these constants aren’t always equal. I’ve written a tool and it found 18 discrepancies in glcorearb.h and gl2ext.h together.

Khronos/Khronos discrepancy:

• GL_UNSIGNED_INT_10_10_10_2: 0x8036 (core), 0x8df6 (OES)
• GL_HALF_FLOAT: 0x140b (core), 0x8d61 (OES)
• GL_GEOMETRY_VERTICES_OUT: 0x8916 (core), 0x8dda (ARB)
• GL_GEOMETRY_INPUT_TYPE: 0x8917 (core), 0x8ddb (ARB)
• GL_GEOMETRY_OUTPUT_TYPE: 0x8918 (core), 0x8ddc (ARB)

Khronos/major vendor discrepancy:

• GL_DEPTH_COMPONENT32F: 0x8cac (core), 0x8dab (NV)
• GL_DEPTH32F_STENCIL8: 0x8cad (core), 0x8dac (NV)
• GL_UNSIGNED_INT64: 0x140f (ARB, NV), 0x8bc2 (AMD)

Other:

• GL_TEXTURE_WIDTH: 0x1000 (core), 0x8bd2 (QCOM)
• GL_TEXTURE_HEIGHT: 0x1001 (core), 0x8bd3 (QCOM)
• GL_TEXTURE_INTERNAL_FORMAT: 0x1003 (core), 0x8bd5 (QCOM)
• GL_TEXTURE_DEPTH: 0x8071 (core), 0x8bd4 (QCOM)
• GL_RENDERBUFFER_SAMPLES: 0x8cab (core, ANGLE, APPLE, EXT, NV), 0x9133 (IMG)
• GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE: 0x8d56 (core, ANGLE, APPLE, EXT, NV), 0x9134 (IMG)
• GL_MAX_SAMPLES: 0x8d57 (core, ANGLE, APPLE, EXT, NV), 0x9135 (IMG)
• GL_TEXTURE_SAMPLES: 0x9106 (core), 0x9136 (IMG)
• GL_TEXTURE_TARGET: 0x1006 (core), 0x8bda (QCOM)
• GL_CONSERVATIVE_RASTERIZATION: 0x83fe (INTEL), 0x9346 (NV)

I think that’s not a big problem but still, needs to be sorted out somehow.

[sfan5]

Since hecks is gone and you would be the only consumer of these GL bindings you'd have to fix this yourself.
Maybe we should switch to something like glad instead?

[numberZero]

you'd have to fix this yourself.

Actually I plan to work on this, gradually, in the context of #160. It may be that there is nothing to worry of as these things are in the core already in the target GL versions, I need to check for that first.

Maybe we should switch to something like glad instead?

Maybe. Not that I like GLAD specifically (due to overuse of macros, mainly) but that may be a good way nevertheless. And it’s better than GLEW IIRC.