3 commits

Author	SHA1	Message	Date
Aliaksandr Kalenik	66e1d599f8	LibWeb: Use scroll state from snapshot while applying clip rectangles ... Fixes race condition introduced in eed47acb when rendering thread accesses ScrollFrame that could be mutated in the middle of rasterization by the main thread, resulting in broken rendering. Fixes https://github.com/LadybirdBrowser/ladybird/issues/5553	2025-07-24 13:03:23 -04:00
Aliaksandr Kalenik	eed47acb1f	LibWeb: Expand ClipFrame into clip rectangles during display list replay ... Until now, every paint phase of every PaintableBox injected its own clipping sequence into the display list: ``` before_paint: Save AddClipRect (1) ...clip rectangles for each containing block with clip... AddClipRect (N) paint: ...paint phase items... after_paint: Restore ``` Because we ran that sequence for every phase of every box, Skia had to rebuild clip stack `paint_phases * paintable_boxes` times. Worse, usually most paint phases contribute no visible drawing at all, yet we still had to emit clipping items because `before_paint()` has no way to know that in advance. This change takes a different approach: - Clip information is now attached as metadata `ClipFrame` to each DisplayList item. - `DisplayListPlayer` groups consecutive commands that share a `ClipFrame`, applying the clip once at the start of the group and restoring it once at the end. Going from 10 ms to 5 ms in rasterization on Discord might not sound like much, but keep in mind that for 60fps we have 16 ms per frame and there is a lot more work besides display list rasterization we do in each frame. * https://discord.com/channels/1247070541085671459/1247090064480014443 - DisplayList items: 81844 -> 3671 - rasterize time: 10 ms -> 5 ms - record time: 5 ms -> 3 ms * https://github.com/LadybirdBrowser/ladybird - DisplayList items: 7902 -> 1176 - rasterize time: 4 ms -> 4 ms - record time: 3 ms -> 2 ms	2025-07-14 15:48:28 +02:00
Timothy Flynn	93712b24bf	Everywhere: Hoist the Libraries folder to the top-level	2024-11-10 12:50:45 +01:00

Renamed from Userland/Libraries/LibWeb/Painting/ClipFrame.h (Browse further)