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LibWeb+WebContent: Move display list rasterization off the main thread

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The display list is an immutable data structure, so once it's created,
rasterization can be moved to a separate thread. This allows more room
for performing other tasks between processing HTML rendering tasks.

This change makes PaintingSurface, ImmutableBitmap, and GlyphRun atomic
ref-counted, as they are shared between the main and rendering threads
by being included in the display list.
This commit is contained in:
Aliaksandr Kalenik 2025-02-25 04:07:53 +01:00 • committed by Alexander Kalenik
parent 86b831750d
commit 24e2c402f5
Notes: github-actions[bot] 2025-03-31 14:59:11 +00:00
16 changed files with 180 additions and 42 deletions
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23
Libraries/LibWeb/HTML/TraversableNavigable.cpp
View file

@ -53,12 +53,16 @@ TraversableNavigable::TraversableNavigable(GC::Ref<Page> page)
, m_session_history_traversal_queue(vm().heap().allocate<SessionHistoryTraversalQueue>())
{
auto display_list_player_type = page->client().display_list_player_type();
OwnPtr<Painting::DisplayListPlayerSkia> skia_player;
if (display_list_player_type == DisplayListPlayerType::SkiaGPUIfAvailable) {
m_skia_backend_context = get_skia_backend_context();
m_skia_player = make<Painting::DisplayListPlayerSkia>(m_skia_backend_context);
skia_player = make<Painting::DisplayListPlayerSkia>(m_skia_backend_context);
} else {
m_skia_player = make<Painting::DisplayListPlayerSkia>();
skia_player = make<Painting::DisplayListPlayerSkia>();
}
m_rendering_thread.set_skia_player(move(skia_player));
m_rendering_thread.start();
}
TraversableNavigable::~TraversableNavigable() = default;
@ -1429,13 +1433,13 @@ NonnullRefPtr<Gfx::PaintingSurface> TraversableNavigable::painting_surface_for_b
return *new_surface;
}
void TraversableNavigable::paint(DevicePixelRect const& content_rect, Painting::BackingStore& target, PaintOptions paint_options)
RefPtr<Painting::DisplayList> TraversableNavigable::record_display_list(DevicePixelRect const& content_rect, PaintOptions paint_options)
{
m_needs_repaint = false;
auto document = active_document();
if (!document)
return;
return {};
for (auto& navigable : all_navigables()) {
if (auto active_document = navigable->active_document(); active_document && active_document->paintable())
@ -1447,13 +1451,12 @@ void TraversableNavigable::paint(DevicePixelRect const& content_rect, Painting::
paint_config.should_show_line_box_borders = paint_options.should_show_line_box_borders;
paint_config.has_focus = paint_options.has_focus;
paint_config.canvas_fill_rect = Gfx::IntRect { {}, content_rect.size() };
auto display_list = document->record_display_list(paint_config);
if (!display_list)
return;
return document->record_display_list(paint_config);
}
auto painting_surface = painting_surface_for_backing_store(target);
m_skia_player->set_surface(painting_surface);
m_skia_player->execute(*display_list);
void TraversableNavigable::start_display_list_rendering(RefPtr<Painting::DisplayList> display_list, NonnullRefPtr<Gfx::PaintingSurface> painting_surface, Function<void()>&& callback)
{
m_rendering_thread.enqueue_rendering_task(move(display_list), move(painting_surface), move(callback));
}
}