diff options
Diffstat (limited to 'gtk/gtkcssrgbavalue.c')
| -rw-r--r-- | gtk/gtkcssrgbavalue.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gtk/gtkcssrgbavalue.c b/gtk/gtkcssrgbavalue.c index a7134ef465..f840160bde 100644 --- a/gtk/gtkcssrgbavalue.c +++ b/gtk/gtkcssrgbavalue.c @@ -107,6 +107,9 @@ static const GtkCssValueClass GTK_CSS_VALUE_RGBA = { gtk_css_value_rgba_print }; +static GtkCssValue transparent_black_singleton = (GtkCssValue) { >K_CSS_VALUE_RGBA, 1, { 0, 0, 0, 0 }}; +static GtkCssValue transparent_white_singleton = (GtkCssValue) { >K_CSS_VALUE_RGBA, 1, { 1, 1, 1, 0 }}; + GtkCssValue * _gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba) { @@ -114,12 +117,31 @@ _gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba) g_return_val_if_fail (rgba != NULL, NULL); + if (gdk_rgba_is_clear (rgba)) + { + if (rgba->red == 1 && + rgba->green == 1 && + rgba->blue == 1) + return _gtk_css_value_ref (&transparent_white_singleton); + + if (rgba->red == 0 && + rgba->green == 0 && + rgba->blue == 0) + return _gtk_css_value_ref (&transparent_black_singleton); + } + value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA); value->rgba = *rgba; return value; } +GtkCssValue * +_gtk_css_rgba_value_new_transparent (void) +{ + return _gtk_css_value_ref (&transparent_black_singleton); +} + const GdkRGBA * _gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba) { |