On some platforms `VK_FORMAT_R8G8B8_*` are not supported as vertex buffers. The
obvious workaround for this is to use `VK_FORMAT_R8G8B8A8_*`. Using unsupported
vertex formats would crash Blender as it is not able to compile the graphics
pipelines that use them.
Known platforms are:
- NVIDIA Mobile GPUs (Quadro M1000M)
- AMD Polaris (open source drivers)
This PR adds the initial workings for other unsupported vertex buffer formats we
need to fix in the future.
`VKDevice.workarounds.vertex_formats` contain booleans if the workaround for
a specific format should be turned on (`r8g8b8 = true`). `VertexFormatConverter` can be
used to identify if conversions are needed and perform the conversion.
Pull Request: https://projects.blender.org/blender/blender/pulls/114572
f76ceddc98