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brush: remake blur brush as 4 box blur passes #6

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mrgaturus opened this issue Dec 3, 2023 · 0 comments

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mrgaturus commented Dec 3, 2023

current blur implementation is tricky: downscaling -> blur -> upscaling

it works very fast enough but it does many pixel sampling and is not cache friendly
4 box blur passes are cache friendly with low pixel sampling and aproximates gaussian blur better

mrgaturus changed the title ~~blur brush: remake as 4 box blur passes~~ brush: remake blur brush as 4 box blur passes

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