Use more accurate bit for alpha lookup. - #2473
#2473Merged
JimBobSquarePants merged 2 commits intoJun 13, 2023
mainSixLabors/ImageSharp:mainfrom
js/2469-color-LUT-memorySixLabors/ImageSharp:js/2469-color-LUT-memoryCopy head branch name to clipboard
Merged
Use more accurate bit for alpha lookup.#2473JimBobSquarePants merged 2 commits intomainSixLabors/ImageSharp:mainfrom js/2469-color-LUT-memorySixLabors/ImageSharp:js/2469-color-LUT-memoryCopy head branch name to clipboard
JimBobSquarePants merged 2 commits into
mainSixLabors/ImageSharp:mainfrom
js/2469-color-LUT-memorySixLabors/ImageSharp:js/2469-color-LUT-memoryCopy head branch name to clipboard
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JimBobSquarePants
requested review from
antonfirsov,
brianpopow,
dlemstra and
tocsoft
June 12, 2023 06:11
4 tasks
antonfirsov
approved these changes
Jun 13, 2023
| { | ||
| private const int IndexBits = 5; | ||
| private const int IndexAlphaBits = 5; | ||
| private const int IndexAlphaBits = 6; |
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This could be zero when TPixel doesn't have an alpha. It might be worth to eventually implement some trick to have two versions of EuclideanPixelMap, so we save memory when working with RGB pngs and gifs.
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Good point. We could easily preserve much more accurate matches in less space.
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Description
Fixes #2469
Our pixel map accuracy wasn't good enough for alpha comparison, so we were leaving artifacts.
This increases memory from 2.26MB to 4.45MB but not only do we fix our issue, as a result of the increased accuracy, we're also getting less collisions in our RGB components.