From 854cf5d49916c8b4eb7218c340db2f95dca81d24 Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@linux.intel.com>
Date: Tue, 6 Jan 2009 12:53:30 +0000
Subject: [PATCH] Animate ClutterColor properties

We can animate a ClutterColor-based property between an interval
of two colors by simply applying the factor to each color component.
---
 clutter/clutter-interval.c         | 21 ++++++++++++++++++++-
 tests/interactive/test-animation.c | 17 ++++++++++++-----
 2 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/clutter/clutter-interval.c b/clutter/clutter-interval.c
index 5f2924d09..a3be68c71 100644
--- a/clutter/clutter-interval.c
+++ b/clutter/clutter-interval.c
@@ -57,9 +57,10 @@
 #include <glib-object.h>
 #include <gobject/gvaluecollector.h>
 
+#include "clutter-color.h"
+#include "clutter-fixed.h"
 #include "clutter-interval.h"
 #include "clutter-units.h"
-#include "clutter-fixed.h"
 
 enum
 {
@@ -249,6 +250,24 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
         g_value_set_boolean (value, FALSE);
       break;
 
+    case G_TYPE_BOXED:
+      if (value_type == CLUTTER_TYPE_COLOR)
+        {
+          const ClutterColor *ia, *ib;
+          ClutterColor res = { 0, };
+
+          ia = clutter_value_get_color (initial);
+          ib = clutter_value_get_color (final);
+
+          res.red   = (factor * (ib->red   - (gdouble) ia->red))   + ia->red;
+          res.green = (factor * (ib->green - (gdouble) ia->green)) + ia->green;
+          res.blue  = (factor * (ib->blue  - (gdouble) ia->blue))  + ia->blue;
+          res.alpha = (factor * (ib->alpha - (gdouble) ia->alpha)) + ia->alpha;
+
+          clutter_value_set_color (value, &res);
+        }
+      break;
+
     default:
       break;
     }
diff --git a/tests/interactive/test-animation.c b/tests/interactive/test-animation.c
index 000e02bd8..ee0ff7337 100644
--- a/tests/interactive/test-animation.c
+++ b/tests/interactive/test-animation.c
@@ -23,13 +23,12 @@ on_button_press (ClutterActor       *actor,
   ClutterAnimation *animation;
   gint old_x, old_y, new_x, new_y;
   guint old_width, old_height, new_width, new_height;
-  guint8 old_op, new_op;
   gdouble new_angle;
   ClutterVertex vertex = { 0, };
+  ClutterColor new_color = { 0, };
 
   clutter_actor_get_position (actor, &old_x, &old_y);
   clutter_actor_get_size (actor, &old_width, &old_height);
-  old_op = clutter_actor_get_opacity (actor);
 
   /* determine the final state of the animation depending on
    * the state of the actor
@@ -40,8 +39,12 @@ on_button_press (ClutterActor       *actor,
       new_y = old_y - 100;
       new_width = old_width + 200;
       new_height = old_height + 200;
-      new_op = 255;
       new_angle = 360.0;
+
+      new_color.red = 0xdd;
+      new_color.green = 0x44;
+      new_color.blue = 0xdd;
+      new_color.alpha = 0xff;
     }
   else
     {
@@ -49,8 +52,12 @@ on_button_press (ClutterActor       *actor,
       new_y = old_y + 100;
       new_width = old_width - 200;
       new_height = old_height - 200;
-      new_op = 128;
       new_angle = 0.0;
+
+      new_color.red = 0x44;
+      new_color.green = 0xdd;
+      new_color.blue = 0x44;
+      new_color.alpha = 0x88;
     }
 
   vertex.x = CLUTTER_UNITS_FROM_FLOAT ((float) new_width / 2);
@@ -62,7 +69,7 @@ on_button_press (ClutterActor       *actor,
                            "y", new_y,
                            "width", new_width,
                            "height", new_height,
-                           "opacity", new_op,
+                           "color", &new_color,
                            "rotation-angle-z", new_angle,
                            "fixed::rotation-center-z", &vertex,
                            "fixed::reactive", FALSE,