isa/gnome-shell
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

st/theme-node-drawing: Conditionally paint the center shadow rectangle

Browse Source 
Only when part of it is actually visible.

Because the central rectangle is generally the largest part, this
eliminates most of the shadow's render time. For example, animating
`.workspace-background` by tapping Super, the shell's overall render
time is reduced about 15%.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1915>
This commit is contained in:
Daniel van Vugt 2021-05-25 17:33:01 +08:00 committed by Marge Bot
parent 436fd81cfc
commit 9b3ee774f6
1 changed files with 18 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/st/st-theme-node-drawing.c
View File

@ -2021,6 +2021,8 @@ st_theme_node_paint_sliced_shadow (StThemeNodePaintState *state,
gfloat shadow_blur_radius, x_spread_factor, y_spread_factor;
float rectangles[8 * 9];
gint idx;
ClutterColor background_color;
static const ClutterColor invisible_occluded = {3, 2, 1, 0};
if (paint_opacity == 0)
return;
@ -2178,16 +2180,23 @@ st_theme_node_paint_sliced_shadow (StThemeNodePaintState *state,
rectangles[idx++] = s_bottom;
}
/* Center middle */
rectangles[idx++] = left;
rectangles[idx++] = top;
rectangles[idx++] = right;
rectangles[idx++] = bottom;
/* Center middle is not definitely occluded? */
st_theme_node_get_background_color (node, &background_color);
if (!clutter_color_equal (&background_color, &invisible_occluded) ||
paint_opacity < 255 ||
xoffset > shadow_blur_radius || left < 0 ||
yoffset > shadow_blur_radius || top < 0)
{
rectangles[idx++] = left;
rectangles[idx++] = top;
rectangles[idx++] = right;
rectangles[idx++] = bottom;
rectangles[idx++] = s_left;
rectangles[idx++] = s_top;
rectangles[idx++] = s_right;
rectangles[idx++] = s_bottom;
rectangles[idx++] = s_left;
rectangles[idx++] = s_top;
rectangles[idx++] = s_right;
rectangles[idx++] = s_bottom;
}
if (xend > right)
{