Nico Weber 9e8b507fad LibGfx/WebP: Do not add alpha channel for animated images without alpha ...

In practice, it looks like e.g. the animaged webp file on
https://mathiasbynens.be/demo/animated-webp has the header flag set,
because 2 of the frames have alpha, but they're composited on top of
the final bitmap, but the final bitmap isn't transparent there. So
that image still gets a useless alpha channel. Oh well.

2023-05-09 17:46:37 +02:00

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