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css: Add a special chroma key color and use it on .workspace-background

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There's no visible change here since we're just moving from the
default transparent black to transparent other. But the latter can
be used as a special value to indicate to the rendering code when a
background is expected to be always occluded.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1915>
This commit is contained in:
Daniel van Vugt 2021-07-15 14:18:48 +08:00 committed by Marge Bot
parent 5de3491df3
commit 436fd81cfc
2 changed files with 6 additions and 0 deletions
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5
data/theme/gnome-shell-sass/_common.scss
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@ -35,6 +35,11 @@ $base_border_radius: 8px;
// radii of things that display over other things, e.g. popovers
$modal_radius: $base_border_radius*2; // 24px
// Chroma key to flag when a background-color is always occluded, not visible.
// This allows any box-shadow behind it to be rendered more efficiently by
// omitting the middle rectangle.
$invisible_occluded_bg_color: rgba(3,2,1,0);
// fonts
$base_font_size: 11;
$text_shadow_color: if($variant == 'light', rgba(255,255,255,0.3), rgba(0,0,0,0.2));

1
data/theme/gnome-shell-sass/widgets/_window-picker.scss
View File

@ -48,5 +48,6 @@ $window_close_button_padding: 3px;
.workspace-background {
// keep in sync with BACKGROUND_CORNER_RADIUS_PIXELS in workspace.js
border-radius: 30px;
background-color: $invisible_occluded_bg_color;
box-shadow: 0 4px 16px 4px transparentize(darken($osd_bg_color, 30%), 0.7);
}