RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-30 23:18:10 +00:00
Code Issues Activity Actions

WindowServer: Skip composing windows where entire dirty rect is covered.

Browse source 
If another window is currently in front of us and is fully opaque,
we can just skip to the next window. This avoids a whole lot of painting
with overlapping windows. :^)
This commit is contained in:
Andreas Kling 2019-03-09 21:38:28 +01:00
parent 963e95cb1a
commit 272a41d02d
1 changed files with 16 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

16
WindowServer/WSWindowManager.cpp
View file

@ -871,6 +871,20 @@ void WSWindowManager::compose()
return false;
};
auto any_opaque_window_above_this_one_contains_rect = [this] (const WSWindow& a_window, const Rect& r) {
for (auto* window = a_window.next(); window; window = window->next()) {
if (!window->is_visible())
continue;
if (window->opacity() < 1.0f)
continue;
if (window->has_alpha_channel())
continue;
if (outer_window_rect(*window).contains(r))
return true;
}
return false;
};
auto any_dirty_rect_intersects_window = [&dirty_rects] (const WSWindow& window) {
auto window_rect = outer_window_rect(window);
for (auto& dirty_rect : dirty_rects.rects()) {
@ -898,6 +912,8 @@ void WSWindowManager::compose()
PainterStateSaver saver(*m_back_painter);
m_back_painter->set_clip_rect(outer_window_rect(window));
for (auto& dirty_rect : dirty_rects.rects()) {
if (any_opaque_window_above_this_one_contains_rect(window, dirty_rect))
continue;
PainterStateSaver saver(*m_back_painter);
m_back_painter->set_clip_rect(dirty_rect);
paint_window_frame(window);