Aliaksandr Kalenik f4a5c136c3 LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter ...

Before this change, we used Gfx::Bitmap to represent both decoded
images that are not going to be mutated and bitmaps corresponding
to canvases that could be mutated.

This change introduces a wrapper for bitmaps that are not going to be
mutated, so the painter could do caching: texture caching in the case
of GPU painter and potentially scaled bitmap caching in the case of CPU
painter.

2023-11-26 12:55:43 +01:00

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