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LibWeb: Move painting surface allocation into rendering thread

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Skia has a check in debug mode to verify that surface is only used
within one thread. Before this change we were violating this by
allocating surfaces on the main thread while using and destructing them
on the rendering thread.
This commit is contained in:
Aliaksandr Kalenik 2025-04-03 18:03:17 +02:00 • committed by Alexander Kalenik
commit 12a2aebeb6
Notes: github-actions[bot] 2025-04-03 20:02:46 +00:00
6 changed files with 73 additions and 52 deletions
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40
Libraries/LibWeb/HTML/TraversableNavigable.cpp
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@ -62,7 +62,8 @@ TraversableNavigable::TraversableNavigable(GC::Ref<Page> page)
}
m_rendering_thread.set_skia_player(move(skia_player));
m_rendering_thread.start();
m_rendering_thread.set_skia_backend_context(m_skia_backend_context);
m_rendering_thread.start(display_list_player_type);
}
TraversableNavigable::~TraversableNavigable() = default;
@ -1399,38 +1400,7 @@ void TraversableNavigable::set_viewport_size(CSSPixelSize size)
Navigable::set_viewport_size(size);
// Invalidate the surface cache if the traversable changed size.
m_bitmap_to_surface.clear();
}
NonnullRefPtr<Gfx::PaintingSurface> TraversableNavigable::painting_surface_for_backing_store(Painting::BackingStore& backing_store)
{
auto& bitmap = backing_store.bitmap();
auto cached_surface = m_bitmap_to_surface.find(&bitmap);
if (cached_surface != m_bitmap_to_surface.end())
return cached_surface->value;
RefPtr<Gfx::PaintingSurface> new_surface;
if (page().client().display_list_player_type() == DisplayListPlayerType::SkiaGPUIfAvailable && m_skia_backend_context) {
#ifdef USE_VULKAN
// Vulkan: Try to create an accelerated surface.
new_surface = Gfx::PaintingSurface::create_with_size(m_skia_backend_context, backing_store.size(), Gfx::BitmapFormat::BGRA8888, Gfx::AlphaType::Premultiplied);
new_surface->on_flush = [backing_store = static_cast<NonnullRefPtr<Painting::BackingStore>>(backing_store)](auto& surface) { surface.read_into_bitmap(backing_store->bitmap()); };
#endif
#ifdef AK_OS_MACOS
// macOS: Wrap an IOSurface if available.
if (is<Painting::IOSurfaceBackingStore>(backing_store)) {
auto& iosurface_backing_store = static_cast<Painting::IOSurfaceBackingStore&>(backing_store);
new_surface = Gfx::PaintingSurface::wrap_iosurface(iosurface_backing_store.iosurface_handle(), *m_skia_backend_context);
}
#endif
}
// CPU and fallback: wrap the backing store bitmap directly.
if (!new_surface)
new_surface = Gfx::PaintingSurface::wrap_bitmap(bitmap);
m_bitmap_to_surface.set(&bitmap, *new_surface);
return *new_surface;
m_rendering_thread.clear_bitmap_to_surface_cache();
}
RefPtr<Painting::DisplayList> TraversableNavigable::record_display_list(DevicePixelRect const& content_rect, PaintOptions paint_options)
@ -1454,9 +1424,9 @@ RefPtr<Painting::DisplayList> TraversableNavigable::record_display_list(DevicePi
return document->record_display_list(paint_config);
}
void TraversableNavigable::start_display_list_rendering(NonnullRefPtr<Painting::DisplayList> display_list, NonnullRefPtr<Gfx::PaintingSurface> painting_surface, Function<void()>&& callback)
void TraversableNavigable::start_display_list_rendering(NonnullRefPtr<Painting::DisplayList> display_list, NonnullRefPtr<Painting::BackingStore> backing_store, Function<void()>&& callback)
{
m_rendering_thread.enqueue_rendering_task(move(display_list), move(painting_surface), move(callback));
m_rendering_thread.enqueue_rendering_task(move(display_list), move(backing_store), move(callback));
}
}