gboolean invert_color(ClutterActor * actor)
{
ClutterColor color;
clutter_actor_get_background_color(actor, & color);
color.red = ~ color.red;
color.green = ~ color.green;
color.blue = ~ color.blue;
clutter_actor_set_background_color(actor, & color);
}
/* Sets our material to paint with a 1x1 texture of the stage's background
* color; doing this when we have no pixmap allows the application to turn
* off painting the stage. There might be a performance benefit to
* painting in this case with a solid color, but the normal solid color
* case is a 1x1 root pixmap, so we'd have to reverse-engineer that to
* actually pick up the (small?) performance win. This is just a fallback.
*/
static void
set_texture_to_stage_color (MetaScreenBackground *background)
{
ClutterActor *stage = meta_get_stage_for_screen (background->screen);
ClutterColor color;
CoglTexture *texture;
clutter_actor_get_background_color (stage, &color);
/* Slicing will prevent COGL from using hardware texturing for
* the tiled 1x1 pixmap, and will cause it to draw the window
* background in millions of separate 1x1 rectangles */
texture = meta_create_color_texture_4ub (color.red, color.green,
color.blue, 0xff,
COGL_TEXTURE_NO_SLICING);
set_texture (background, texture);
cogl_object_unref (texture);
}
