Andreas Kling f7f7aa6986 LibGfx/PNG: Respect the tRNS chunk transparency with color type 2 ...

For PNG color type 2 (TrueColor), if there's a tRNS chunk, it specifies
an R/G/B triplet in the image bit depth. This triplet acts as the
transparency value, and should yield transparent pixels wherever that
specific color value is present.

We now support this. :^)

2022-02-14 18:39:20 +01:00

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