[gtk+/gtk-style-context: 326/347] GtkThemingEngine: Use GtkSymbolicColor for shades.

[Carlos Garnacho <carlosg src gnome org>]

commit ad1bceedece247af7723ca6195064ad3b0deb342
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Nov 6 12:38:52 2010 +0100

    GtkThemingEngine: Use GtkSymbolicColor for shades.

 gtk/gtkthemingengine.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkthemingengine.c b/gtk/gtkthemingengine.c
index d734f35..4475246 100644
--- a/gtk/gtkthemingengine.c
+++ b/gtk/gtkthemingengine.c
@@ -1239,10 +1239,14 @@ color_shade (const GdkRGBA *color,
              gdouble        factor,
              GdkRGBA       *color_return)
 {
-  color_return->red = CLAMP (color->red * factor, 0, 1);
-  color_return->green = CLAMP (color->green * factor, 0, 1);
-  color_return->blue = CLAMP (color->blue * factor, 0, 1);
-  color_return->alpha = color->alpha;
+  GtkSymbolicColor *literal, *shade;
+
+  literal = gtk_symbolic_color_new_literal (color);
+  shade = gtk_symbolic_color_new_shade (literal, factor);
+  gtk_symbolic_color_unref (literal);
+
+  gtk_symbolic_color_resolve (shade, NULL, color_return);
+  gtk_symbolic_color_unref (shade);
 }
 
 static void