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WindowServer: Occlusion calculation fixes

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We didn't properly determine whether a window was fully covered, which
caused some artifacts in certain cases.

Fixes #5283
This commit is contained in:
Tom 2021-02-09 22:07:56 -07:00 • committed by Andreas Kling
parent 338bb73289
commit 5d4c4bd372
1 changed files with 20 additions and 10 deletions
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30
Userland/Services/WindowServer/Compositor.cpp
View file

@ -948,8 +948,14 @@ void Compositor::recompute_occlusions()
if (covering_rect.is_empty())
return IterationDecision::Continue;
auto add_opaque = [&](const Gfx::IntRect& covering) {
auto add_opaque = [&](const Gfx::IntRect& covering) -> bool {
opaque_covering.add(covering);
if (opaque_covering.contains(window_frame_rect)) {
// This window (including frame) is entirely covered by another opaque window
visible_opaque.clear();
transparency_rects.clear();
return false;
}
if (!visible_opaque.is_empty()) {
auto uncovered_opaque = visible_opaque.shatter(covering);
visible_opaque = move(uncovered_opaque);
@ -959,6 +965,7 @@ void Compositor::recompute_occlusions()
auto uncovered_transparency = transparency_rects.shatter(covering);
transparency_rects = move(uncovered_transparency);
}
return true;
};
auto add_transparent = [&](const Gfx::IntRect& covering) {
visible_rects.for_each_intersected(covering, [&](const Gfx::IntRect& intersected) {
@ -972,25 +979,23 @@ void Compositor::recompute_occlusions()
};
if (w2.is_opaque()) {
if (w2.frame().is_opaque()) {
if (opaque_covering.contains(covering_rect)) {
// This window (including frame) is entirely covered by another opaque window
visible_opaque.clear();
transparency_rects.clear();
if (!add_opaque(covering_rect))
return IterationDecision::Break;
}
add_opaque(covering_rect);
} else {
auto covering_window_rect = covering_rect.intersected(w2.rect());
add_opaque(covering_window_rect);
if (!add_opaque(covering_window_rect))
return IterationDecision::Break;
for (auto& covering_frame_rect : covering_rect.shatter(covering_window_rect))
add_transparent(covering_frame_rect);
}
} else {
if (w2.frame().is_opaque()) {
auto covering_window_rect = covering_rect.intersected(w2.rect());
for (auto& covering_frame_rect : covering_rect.shatter(covering_window_rect)) {
if (!add_opaque(covering_frame_rect))
return IterationDecision::Break;
}
add_transparent(covering_window_rect);
for (auto& covering_frame_rect : covering_rect.shatter(covering_window_rect))
add_opaque(covering_frame_rect);
} else {
add_transparent(covering_rect);
}
@ -1013,6 +1018,11 @@ void Compositor::recompute_occlusions()
auto visible_rects_below_window = visible_rects.shatter(w.rect().intersected(screen_rect));
visible_rects = move(visible_rects_below_window);
}
} else if (w.frame().is_opaque()) {
for (auto& rect : window_frame_rect.shatter(w.rect())) {
auto visible_rects_below_window = visible_rects.shatter(rect);
visible_rects = move(visible_rects_below_window);
}
}
return IterationDecision::Continue;
});