Add ClutterCanvas, a drawing content

clutter/clutter-macros.h

@@ -248,4 +248,24 @@
 # define CLUTTER_AVAILABLE_IN_1_10
 #endif
 
+/**
+ * CLUTTER_CAIRO_FORMAT_ARGB32:
+ *
+ * The #CoglPixelFormat to be used when uploading image data from
+ * and to a Cairo image surface using %CAIRO_FORMAT_ARGB32 and
+ * %CAIRO_FORMAT_RGB24 as #cairo_format_t.
+ *
+ * Since: 1.8
+ */
+
+/* Cairo stores the data in native byte order as ARGB but Cogl's pixel
+ * formats specify the actual byte order. Therefore we need to use a
+ * different format depending on the architecture
+ */
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define CLUTTER_CAIRO_FORMAT_ARGB32     (COGL_PIXEL_FORMAT_BGRA_8888_PRE)
+#else
+#define CLUTTER_CAIRO_FORMAT_ARGB32     (COGL_PIXEL_FORMAT_ARGB_8888_PRE)
+#endif
+
 #endif /* __CLUTTER_MACROS_H__ */