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WindowServer: Improvements to support alpha channel in window frames

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This fixes some issues handling the alpha channel that may be present
in rendered window frames.

Fixes #5303
This commit is contained in:
Tom 2021-02-12 14:25:08 -07:00 • committed by Andreas Kling
parent 9ae02d4c92
commit 0138f13bfe
6 changed files with 55 additions and 20 deletions
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22
Userland/Libraries/LibGfx/ClassicWindowTheme.cpp
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@ -89,11 +89,13 @@ void ClassicWindowTheme::paint_normal_frame(Painter& painter, WindowState window
painter.fill_rect_with_gradient(titlebar_rect, border_color, border_color2);
int stripe_left = titlebar_title_rect.right() + 5;
int stripe_right = leftmost_button_rect.left() - 3;
if (stripe_left && stripe_right && stripe_left < stripe_right) {
for (int i = 2; i <= titlebar_inner_rect.height() - 2; i += 2) {
painter.draw_line({ stripe_left, titlebar_inner_rect.y() + i }, { stripe_right, titlebar_inner_rect.y() + i }, stripes_color);
if (stripes_color.alpha() > 0) {
int stripe_left = titlebar_title_rect.right() + 5;
if (stripe_left && stripe_right && stripe_left < stripe_right) {
for (int i = 2; i <= titlebar_inner_rect.height() - 2; i += 2) {
painter.draw_line({ stripe_left, titlebar_inner_rect.y() + i }, { stripe_right, titlebar_inner_rect.y() + i }, stripes_color);
}
}
}
@ -145,11 +147,13 @@ void ClassicWindowTheme::paint_notification_frame(Painter& painter, const IntRec
auto titlebar_rect = title_bar_rect(WindowType::Notification, window_rect, palette);
painter.fill_rect_with_gradient(Gfx::Orientation::Vertical, titlebar_rect, palette.active_window_border1(), palette.active_window_border2());
int stripe_top = close_button_rect.bottom() + 4;
int stripe_bottom = window_rect.height() - 3;
if (stripe_top && stripe_bottom && stripe_top < stripe_bottom) {
for (int i = 2; i <= palette.window_title_height() - 2; i += 2) {
painter.draw_line({ titlebar_rect.x() + i, stripe_top }, { titlebar_rect.x() + i, stripe_bottom }, palette.active_window_title_stripes());
if (palette.active_window_title_stripes().alpha() > 0) {
int stripe_top = close_button_rect.bottom() + 4;
int stripe_bottom = window_rect.height() - 3;
if (stripe_top && stripe_bottom && stripe_top < stripe_bottom) {
for (int i = 2; i <= palette.window_title_height() - 2; i += 2) {
painter.draw_line({ titlebar_rect.x() + i, stripe_top }, { titlebar_rect.x() + i, stripe_bottom }, palette.active_window_title_stripes());
}
}
}
}