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LibWeb/Painting: Remove Save and Restore commands in RecordingPainter

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Removing State and Restore reduces painting commands count by 30-50%
on an average website.

Due to this change, it was also necessary to replace AddClipRect with
SetClipRect command.
This commit is contained in:
Aliaksandr Kalenik 2023-10-26 04:12:57 +02:00 • committed by Andreas Kling
parent 0388766531
commit 04a4ffaa3d
2 changed files with 22 additions and 35 deletions
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41
Userland/Libraries/LibWeb/Painting/RecordingPainter.cpp
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@ -123,23 +123,10 @@ CommandResult DrawScaledBitmap::execute(CommandExecutionState& state) const
return CommandResult::Continue;
}
CommandResult SaveState::execute(CommandExecutionState& state) const
{
auto& painter = state.painter();
painter.save();
return CommandResult::Continue;
}
CommandResult RestoreState::execute(CommandExecutionState& state) const
{
auto& painter = state.painter();
painter.restore();
return CommandResult::Continue;
}
CommandResult AddClipRect::execute(CommandExecutionState& state) const
CommandResult SetClipRect::execute(CommandExecutionState& state) const
{
auto& painter = state.painter();
painter.clear_clip_rect();
painter.add_clip_rect(rect);
return CommandResult::Continue;
}
@ -648,12 +635,15 @@ void RecordingPainter::draw_text_run(Gfx::IntPoint baseline_start, Utf8View stri
void RecordingPainter::add_clip_rect(Gfx::IntRect const& rect)
{
push_command(AddClipRect { .rect = state().translation.map(rect) });
}
auto prev_clip_rect = state().clip_rect;
if (!state().clip_rect.has_value()) {
state().clip_rect = state().translation.map(rect);
} else {
state().clip_rect->intersect(state().translation.map(rect));
}
void RecordingPainter::clear_clip_rect()
{
push_command(ClearClipRect {});
if (prev_clip_rect != state().clip_rect)
push_command(SetClipRect { .rect = *state().clip_rect });
}
void RecordingPainter::translate(int dx, int dy)
@ -674,14 +664,21 @@ void RecordingPainter::set_font(Gfx::Font const& font)
void RecordingPainter::save()
{
m_state_stack.append(m_state_stack.last());
push_command(SaveState {});
}
void RecordingPainter::restore()
{
auto prev_clip_rect = state().clip_rect;
VERIFY(m_state_stack.size() > 1);
m_state_stack.take_last();
push_command(RestoreState {});
if (state().clip_rect != prev_clip_rect) {
if (state().clip_rect.has_value())
push_command(SetClipRect { .rect = *state().clip_rect });
else
push_command(ClearClipRect {});
}
}
void RecordingPainter::push_stacking_context(PushStackingContextParams params)