mirror of
https://github.com/brl/mutter.git
synced 2024-12-30 14:42:14 +00:00
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
|
#include <clutter/clutter.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
main (int argc, char **argv)
|
||
|
|
{
|
||
|
|
ClutterActor *stage, *image, *sub_image;
|
||
|
|
CoglHandle texture, sub_texture;
|
||
|
|
gfloat image_width, image_height;
|
||
|
|
|
||
|
|
/* Initialize Clutter */
|
||
|
|
clutter_init (NULL, NULL);
|
||
|
|
|
||
|
|
/* Get the default stage */
|
||
|
|
stage = clutter_stage_get_default ();
|
||
|
|
clutter_stage_set_title (CLUTTER_STAGE (stage), "Sub-texture");
|
||
|
|
|
||
|
|
/* Create a new ClutterTexture that shows smiley.png */
|
||
|
|
image = clutter_texture_new_from_file ("smiley.png", NULL);
|
||
|
|
clutter_actor_get_size (image, &image_width, &image_height);
|
||
|
|
clutter_actor_set_size (stage,
|
||
|
|
image_width * 3 / 2 + 30,
|
||
|
|
image_height + 20);
|
||
|
|
|
||
|
|
/* Grab the CoglHandle of the underlying Cogl texture */
|
||
|
|
texture = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (image));
|
||
|
|
|
||
|
|
/* Create a new Cogl texture from the handle above. That new texture is a
|
||
|
|
* rectangular region from image, more precisely the north ouest corner
|
||
|
|
* of the image */
|
||
|
|
sub_texture = cogl_texture_new_from_sub_texture (texture,
|
||
|
|
0, 0,
|
||
|
|
image_width / 2,
|
||
|
|
image_height / 2);
|
||
|
|
|
||
|
|
/* Finally, use the newly created Cogl texture to feed a new ClutterTexture
|
||
|
|
* and thus create a new actor that displays sub_texture */
|
||
|
|
sub_image = clutter_texture_new ();
|
||
|
|
clutter_texture_set_cogl_texture (CLUTTER_TEXTURE (sub_image), sub_texture);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* You could have used the more straightforward g_object_new() function that
|
||
|
|
* can create an object and set some properties on it at the same time:
|
||
|
|
* sub_image = g_object_new (CLUTTER_TYPE_TEXTURE,
|
||
|
|
* "cogl-texture", sub_texture,
|
||
|
|
* NULL);
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Put the original image at (10,10) and the new sub image next to it */
|
||
|
|
clutter_actor_set_position (image, 10, 10);
|
||
|
|
clutter_actor_set_position (sub_image, 20 + image_width, 10);
|
||
|
|
|
||
|
|
/* Add both ClutterTexture to the stage */
|
||
|
|
clutter_container_add (CLUTTER_CONTAINER (stage), image, sub_image, NULL);
|
||
|
|
|
||
|
|
clutter_actor_show_all (stage);
|
||
|
|
|
||
|
|
clutter_main ();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|