- Writes to stderr and returns False on error.
- */
-Bool screen_to_texture (Screen *screen, Window window,
- int desired_width, int desired_height,
- Bool mipmap_p,
- char **filename_return,
- XRectangle *geometry_return,
- int *image_width_return,
- int *image_height_return,
- int *texture_width_return,
- int *texture_height_return);
-
-
-/* Like the above, but the image is loaded in a background process,
- and a callback is run when the loading is complete.