Aliaksandr Kalenik a7cbc7a6b8 LibWeb+LibGfx: Use GPU backend for <canvas> ...

This is implemented by using a GPU-accelerated surface for <canvas> when
a GPU context is available.

A side effect of this change is that all canvas modifications have to be
performed through Gfx::Painter, and whenever its content has to be
accessed, we need to take a snapshot of the corresponding GPU surface.

A new DrawPaintingSurface display list command is introduced to allow
cheap blitting of canvas content without having to read GPU surface
content into RAM.

2024-11-07 13:48:12 +01:00

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