Aliaksandr Kalenik 4b93e27698 LibGfx+LibWeb: Create PaintingSurface snapshot without GPU->RAM readback ...

...by constructing ImmutableBitmap directly from SkImage.

This is a huge optimization for the case when content of canvas is
painted onto another canvas, as it allows pixels to remain in GPU memory
throughout the process.

Fixes performance regression on https://playbiolab.com/ introduced by
switching to GPU-backend for canvas.

2024-11-09 20:51:24 +01:00

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