Jonah Williams aafe60d894 [Impeller] Use downsample shader for blur instead of mip levels. (flutter/engine#53760) ...

Fixes https://github.com/flutter/flutter/issues/150973

On a Pixel 7 pro, this speeds up the repeated blur macrobenchmark by 20ms (~65 -> ~45). The mip computation for backdrop filters is especially wasteful, as most of the contents are unused. RIght now, we also need to continually re-generate mips every time we do a texture flip, even if there is only a single blur. This is because the mip level is a property of the texture, which gets reused in the entity pass backdrop.

2024-07-09 19:58:19 +00:00

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src/flutter

[Impeller] Use downsample shader for blur instead of mip levels. (flutter/engine#53760)

2024-07-09 19:58:19 +00:00