cssimage: Add GtkCssImageCrossFade

Supports the cross-fade() css notation the way the old CSS3 specs did.

The main reason for adding it is supporting image transitions though.

1 files changed, 59 insertions, 0 deletions

diff --git a/gtk/gtkcssimagecrossfadeprivate.h b/gtk/gtkcssimagecrossfadeprivate.h
new file mode 100644
index 0000000000..54929317e4
--- /dev/null
+++ b/gtk/gtkcssimagecrossfadeprivate.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright © 2012 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Benjamin Otte <otte@gnome.org>
+ */
+
+#ifndef __GTK_CSS_IMAGE_CROSS_FADE_PRIVATE_H__
+#define __GTK_CSS_IMAGE_CROSS_FADE_PRIVATE_H__
+
+#include "gtk/gtkcssimageprivate.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_IMAGE_CROSS_FADE           (_gtk_css_image_cross_fade_get_type ())
+#define GTK_CSS_IMAGE_CROSS_FADE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE_CROSS_FADE, GtkCssImageCrossFade))
+#define GTK_CSS_IMAGE_CROSS_FADE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE_CROSS_FADE, GtkCssImageCrossFadeClass))
+#define GTK_IS_CSS_IMAGE_CROSS_FADE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE_CROSS_FADE))
+#define GTK_IS_CSS_IMAGE_CROSS_FADE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE_CROSS_FADE))
+#define GTK_CSS_IMAGE_CROSS_FADE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE_CROSS_FADE, GtkCssImageCrossFadeClass))
+
+typedef struct _GtkCssImageCrossFade           GtkCssImageCrossFade;
+typedef struct _GtkCssImageCrossFadeClass      GtkCssImageCrossFadeClass;
+
+struct _GtkCssImageCrossFade
+{
+  GtkCssImage parent;
+
+  GtkCssImage *start;
+  GtkCssImage *end;
+  double progress;
+};
+
+struct _GtkCssImageCrossFadeClass
+{
+  GtkCssImageClass parent_class;
+};
+
+GType          _gtk_css_image_cross_fade_get_type             (void) G_GNUC_CONST;
+
+GtkCssImage *  _gtk_css_image_cross_fade_new                  (GtkCssImage      *start,
+                                                               GtkCssImage      *end,
+                                                               double            progress);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_IMAGE_CROSS_FADE_PRIVATE_H__ */