X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=gtk%2Fgtkcssimagecrossfade.c;h=1b02af94f73f5e8b6d1cd37f7587d38af3c12346;hb=7c2a752b3724ad9ac88b7abfecc63e4e0eb7eb54;hp=c08c89f63066c5a21b6a410f6dab2d6d61dd5fa3;hpb=eb6ad3562e7c38fb0f4d9f5806cef1afca45d48a;p=~andy%2Fgtk

diff --git a/gtk/gtkcssimagecrossfade.c b/gtk/gtkcssimagecrossfade.c
index c08c89f63..1b02af94f 100644
--- a/gtk/gtkcssimagecrossfade.c
+++ b/gtk/gtkcssimagecrossfade.c
@@ -19,6 +19,7 @@
 
 #include "config.h"
 
+#include <math.h>
 #include <string.h>
 
 #include "gtkcssimagecrossfadeprivate.h"
@@ -85,6 +86,18 @@ gtk_css_image_cross_fade_get_height (GtkCssImage *image)
   return start_height + (end_height - start_height) * cross_fade->progress;
 }
 
+static gboolean
+gtk_css_image_cross_fade_equal (GtkCssImage *image1,
+                                GtkCssImage *image2)
+{
+  GtkCssImageCrossFade *cross_fade1 = GTK_CSS_IMAGE_CROSS_FADE (image1);
+  GtkCssImageCrossFade *cross_fade2 = GTK_CSS_IMAGE_CROSS_FADE (image2);
+
+  return cross_fade1->progress == cross_fade2->progress &&
+         _gtk_css_image_equal (cross_fade1->start, cross_fade2->start) &&
+         _gtk_css_image_equal (cross_fade1->end, cross_fade2->end);
+}
+
 static void
 gtk_css_image_cross_fade_draw (GtkCssImage        *image,
                                cairo_t            *cr,
@@ -105,37 +118,36 @@ gtk_css_image_cross_fade_draw (GtkCssImage        *image,
     }
   else
     {
-      cairo_surface_t *surface;
-
       if (cross_fade->start && cross_fade->end)
         {
           /* to reduce the group size */
-          cairo_rectangle (cr, 0, 0, width, height);
+          cairo_rectangle (cr, 0, 0, ceil (width), ceil (height));
           cairo_clip (cr);
 
           cairo_push_group (cr);
 
+          /* performance trick */
+          cairo_reset_clip (cr);
+
           _gtk_css_image_draw (cross_fade->start, cr, width, height);
 
-          surface = _gtk_css_image_get_surface (cross_fade->end,
-                                                cairo_get_target (cr),
-                                                width, height);
-          cairo_set_source_surface (cr, surface, 0, 0);
+          cairo_push_group (cr);
+          _gtk_css_image_draw (cross_fade->end, cr, width, height);
+          cairo_pop_group_to_source (cr);
+
           cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
           cairo_paint_with_alpha (cr, cross_fade->progress);
-          cairo_surface_destroy (surface);
 
           cairo_pop_group_to_source (cr);
           cairo_paint (cr);
         }
       else if (cross_fade->start || cross_fade->end)
         {
-          surface = _gtk_css_image_get_surface (cross_fade->start ? cross_fade->start : cross_fade->end,
-                                                cairo_get_target (cr),
-                                                width, height);
-          cairo_set_source_surface (cr, surface, 0, 0);
+          cairo_push_group (cr);
+          _gtk_css_image_draw (cross_fade->start ? cross_fade->start : cross_fade->end, cr, width, height);
+          cairo_pop_group_to_source (cr);
+
           cairo_paint_with_alpha (cr, cross_fade->start ? 1.0 - cross_fade->progress : cross_fade->progress);
-          cairo_surface_destroy (surface);
         }
     }
 }
@@ -234,6 +246,7 @@ _gtk_css_image_cross_fade_class_init (GtkCssImageCrossFadeClass *klass)
 
   image_class->get_width = gtk_css_image_cross_fade_get_width;
   image_class->get_height = gtk_css_image_cross_fade_get_height;
+  image_class->equal = gtk_css_image_cross_fade_equal;
   image_class->draw = gtk_css_image_cross_fade_draw;
   image_class->parse = gtk_css_image_cross_fade_parse;
   image_class->print = gtk_css_image_cross_fade_print;