Integrates the GLProfiler into GLQueueRunner to provide GPU timestamp
profiling for OpenGL render passes, similar to the Vulkan backend.
Profiled operations:
- RenderPass (with tag name for identification)
- Copy operations
- Blit operations
- Readback operations
- ReadbackImage operations
The profiler is initialized in CreateDeviceObjects() and shutdown in
DestroyDeviceObjects(). Timing results are logged each frame when the
GPU profile debug overlay is enabled.
Signed-off-by: Chris Healy <cphealy@gmail.com>
Adds a new GLProfiler class for GPU-side timestamp profiling, similar to
VulkanProfiler. Uses GL_EXT_disjoint_timer_query (GLES) or GL_ARB_timer_query
(desktop GL).
Features:
- Scoped Begin()/End() profiling with printf-style naming
- Automatic GPU disjoint detection (frequency changes invalidate results)
- Millisecond timing output via INFO_LOG
- Pre-allocated query pool (1024 queries max per frame)
- Nested scope support with indented output
Signed-off-by: Chris Healy <cphealy@gmail.com>
Add detection for GL_EXT_disjoint_timer_query (OpenGL ES) and
GL_ARB_timer_query (desktop GL) extensions. These extensions provide
GPU timestamp queries for profiling render pass durations.
Also adds function pointer declarations for glQueryCounter,
glGetQueryObjecti64v, and glGetQueryObjectui64v.
Signed-off-by: Chris Healy <cphealy@gmail.com>
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>
Henrik Rydgård