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background: Don't render initial backgrounds

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Add a fast exit for the common case that the background
values are unset.
This commit is contained in:
Matthias Clasen
2020-02-01 09:11:39 +01:00
parent 7027fc9ab6
commit 7fbb37a09f
1 changed files with 17 additions and 6 deletions
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23
gtk/gtkrenderbackground.c
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@@ -261,14 +261,25 @@ gtk_css_style_snapshot_background (GtkCssBoxes *boxes,
GtkSnapshot *snapshot)
{
GtkCssBackgroundValues *background = boxes->style->background;
GtkCssValue *background_image = background->background_image;
const GdkRGBA *bg_color = gtk_css_color_value_get_rgba (background->background_color);
const GtkCssValue *box_shadow = background->box_shadow;
const gboolean has_bg_color = !gdk_rgba_is_clear (bg_color);
const gboolean has_bg_image = _gtk_css_image_value_get_image (_gtk_css_array_value_get_nth (background_image, 0)) != NULL;
const gboolean has_shadow = !gtk_css_shadow_value_is_none (box_shadow);
GtkCssValue *background_image;
const GdkRGBA *bg_color;
const GtkCssValue *box_shadow;
gboolean has_bg_color;
gboolean has_bg_image;
gboolean has_shadow;
gint idx;
if (background->base.type == GTK_CSS_BACKGROUND_INITIAL_VALUES)
return;
background_image = background->background_image;
bg_color = gtk_css_color_value_get_rgba (background->background_color);
box_shadow = background->box_shadow;
has_bg_color = !gdk_rgba_is_clear (bg_color);
has_bg_image = _gtk_css_image_value_get_image (_gtk_css_array_value_get_nth (background_image, 0)) != NULL;
has_shadow = !gtk_css_shadow_value_is_none (box_shadow);
/* This is the common default case of no background */
if (!has_bg_color && !has_bg_image && !has_shadow)
return;