Jelle Raaijmakers 69b94e4235 LibSoftGPU: Make blending simpler and more efficient ...

Previously, we would precalculate "alpha blend factors" on every
configuration update and then calculate the source and destination
blending factors in one go using all these factors. The idea here was
probably that we would get better performance by avoiding branching.

However, by measuring blending performance in Quake III, it seems that
this simpler version that only calculates the required factors reduces
the CPU time spent in `rasterize_triangle` by 3%.

As a bonus, `GL_SRC_ALPHA_SATURATE` is now also implemented.

2023-02-02 14:38:26 +01:00

3.7 KiB

Raw Blame History

View Raw