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SharedGraphics: Add PainterStateSaver RAII helper and Point::operator-().

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Two little things to help tidy up a bit in WSWindowManager.
This commit is contained in:
Andreas Kling 2019-03-09 16:54:41 +01:00
parent 3c2139b824
commit 88f6ce152f
3 changed files with 22 additions and 7 deletions
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10
WindowServer/WSWindowManager.cpp
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@ -876,24 +876,20 @@ void WSWindowManager::compose()
if (!any_dirty_rect_intersects_window(window))
return;
for (auto& dirty_rect : dirty_rects.rects()) {
PainterStateSaver saver(*m_back_painter);
m_back_painter->set_clip_rect(dirty_rect);
paint_window_frame(window);
Rect dirty_rect_in_window_coordinates = Rect::intersection(dirty_rect, window.rect());
if (dirty_rect_in_window_coordinates.is_empty()) {
m_back_painter->clear_clip_rect();
if (dirty_rect_in_window_coordinates.is_empty())
continue;
}
dirty_rect_in_window_coordinates.set_x(dirty_rect_in_window_coordinates.x() - window.x());
dirty_rect_in_window_coordinates.set_y(dirty_rect_in_window_coordinates.y() - window.y());
dirty_rect_in_window_coordinates.move_by(-window.position());
auto dst = window.position();
dst.move_by(dirty_rect_in_window_coordinates.location());
if (window.opacity() == 1.0f)
m_back_painter->blit(dst, *backing_store, dirty_rect_in_window_coordinates);
else
m_back_painter->blit_with_opacity(dst, *backing_store, dirty_rect_in_window_coordinates, window.opacity());
m_back_painter->clear_clip_rect();
}
m_back_painter->clear_clip_rect();
};
for_each_visible_window_from_back_to_front([&] (WSWindow& window) {