This is part of the Vulkan task T68990.
This commits changes a few things:
- Rename extensions to capabilities (but left the file name untouched).
- Cubemap mip render workaround detection is rewritten using gl
commands to avoid using the GPU API before initialization.
- Put all the capabilities that are only relevant for the GL backend
inside GLContext as static variables.
- Cleanup the names of the limit variables.
- Separate all GL related workaround search inside the GL module.
Part of the Vulkan port T68990
This makes a few changes in how the data is being handled by the
backend to allow more flexibility in the future.
The overall code logic is left unchanged.
This is a massive cleanup needed for vulkan support T68990. It provides:
- More meaningful enums with conversion functions.
- Less hacky supports of arrays and cubemaps (all considered layered).
- More inline with the stateless design of vulkan and modern GL.
- Methods Fallbacks are using framebuffer functions that are wrapped
instead of implementing inside the texture module.
What is not in there:
- API change.
- Samplers support (breaks a few effects).
# Conflicts:
# source/blender/gpu/GPU_texture.h
