The original code checked for "Mali" in GL_RENDERER and disabled GLES3
for all Mali GPUs, which was a workaround for bugs in ARM's proprietary
Mali driver. However, Mesa/Panfrost (open-source Mali driver) does not
have these bugs and should be allowed to use GLES3.
This patch:
- Adds GPU_VENDOR_MESA for identifying Mesa drivers via GL_VENDOR
- Changes the GLES3 ban to only apply when GL_VENDOR="ARM" (proprietary)
- Allows Mesa/Panfrost Mali GPUs to use GLES3 features
Expected behavior:
- ARM proprietary driver (GL_VENDOR="ARM"): GLES3 disabled (preserved)
- Mesa/Panfrost (GL_VENDOR="Mesa"): GLES3 enabled
- Other Mesa drivers: Unaffected
Related issues: #4078, #15413
Signed-off-by: Chris Healy <cphealy@gmail.com>
Chris Healy
7ea1260ef0