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LibWeb: Protect SkiaBackendContext with a mutex

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The Skia Ganesh backend we currently use doesn't support painting from
multiple threads, which could happen before this change when the main
thread used Skia to paint on the HTML canvas while the rendering thread
was working on display list rasterization.

Fixes https://github.com/LadybirdBrowser/ladybird/issues/4172
This commit is contained in:
Aliaksandr Kalenik 2025-04-01 20:18:15 +02:00 • committed by Alexander Kalenik
commit fd147e6be0
Notes: github-actions[bot] 2025-04-01 21:40:01 +00:00
7 changed files with 98 additions and 29 deletions
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3
Libraries/LibGfx/PaintingSurface.h
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@ -57,6 +57,9 @@ public:
~PaintingSurface();
void lock_context() const;
void unlock_context() const;
private:
struct Impl;