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Pekka Paalanen f31de214d9 gl-renderer: fix performance regression in frag ... When color management is disabled, the fragment shader was still first ensuring straight alpha and then immediately just going back to pre-multiplied. This is near-impossible for a shader compiler to optimize out, I guess because of the if-statement to handle division by zero. Having view alpha applied in between certainly didn't make it easier. That causes extra fragment computations that are unnecessary. In the issue report this was found to cause a notable performance regression. Fix the performance regression by introducing special-case paths for when straight alpha is not needed. This skips the unnecessary computations. Fixes: https://gitlab.freedesktop.org/wayland/weston/-/issues/623 Fixes: 9a6a4e7032 Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com> (cherry picked from commit 6234cb98d1) Dropped SHADER_COLOR_MAPPING_IDENTITY as that is not available in weston 10.0.		3 years ago
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egl-glue.c	gl-renderer: query DRM device given an EGLDisplay	3 years ago
fragment.glsl	gl-renderer: fix performance regression in frag	3 years ago
gl-renderer-internal.h	gl-renderer: query DRM device given an EGLDisplay	3 years ago
gl-renderer.c	libweston: add initial dma-buf feedback implementation	3 years ago
gl-renderer.h	gl-renderer: Replace pbuffer-create args with struct	5 years ago
gl-shader-config-color-transformation.c	gl-renderer: implement 3 x 1D LUT color pre-curve	3 years ago
gl-shaders.c	gl-renderer: implement SHADER_COLOR_CURVE_LUT_3x1D	3 years ago
meson.build	gl-renderer: implement 3 x 1D LUT color pre-curve	3 years ago
vertex.glsl	gl-renderer: move vertex shader into new file	4 years ago