mirror of
https://github.com/brl/mutter.git
synced 2024-12-30 14:42:14 +00:00
abef73bb58
The former is not yet "officially" deprecated by the latter, but it's confusing to have them both in the code base.
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
#include <stdlib.h>
|
|
#include <clutter/clutter.h>
|
|
|
|
/* pixels between the source and its reflection */
|
|
#define V_PADDING 4
|
|
|
|
static void
|
|
_clone_paint_cb (ClutterActor *actor)
|
|
{
|
|
ClutterActor *source;
|
|
ClutterActorBox box;
|
|
CoglHandle material;
|
|
gfloat width, height;
|
|
guint8 opacity;
|
|
CoglColor color_1, color_2;
|
|
CoglTextureVertex vertices[4];
|
|
|
|
/* if we don't have a source actor, don't paint */
|
|
source = clutter_clone_get_source (CLUTTER_CLONE (actor));
|
|
if (source == NULL)
|
|
goto out;
|
|
|
|
/* if the source texture does not have any content, don't paint */
|
|
material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (source));
|
|
if (material == NULL)
|
|
goto out;
|
|
|
|
/* get the size of the reflection */
|
|
clutter_actor_get_allocation_box (actor, &box);
|
|
clutter_actor_box_get_size (&box, &width, &height);
|
|
|
|
/* get the composite opacity of the actor */
|
|
opacity = clutter_actor_get_paint_opacity (actor);
|
|
|
|
/* figure out the two colors for the reflection: the first is
|
|
* full color and the second is the same, but at 0 opacity
|
|
*/
|
|
cogl_color_init_from_4f (&color_1, 1.0, 1.0, 1.0, opacity / 255.);
|
|
cogl_color_premultiply (&color_1);
|
|
cogl_color_init_from_4f (&color_2, 1.0, 1.0, 1.0, 0.0);
|
|
cogl_color_premultiply (&color_2);
|
|
|
|
/* now describe the four vertices of the quad; since it has
|
|
* to be a reflection, we need to invert it as well
|
|
*/
|
|
vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0;
|
|
vertices[0].tx = 0.0; vertices[0].ty = 1.0;
|
|
vertices[0].color = color_1;
|
|
|
|
vertices[1].x = width; vertices[1].y = 0; vertices[1].z = 0;
|
|
vertices[1].tx = 1.0; vertices[1].ty = 1.0;
|
|
vertices[1].color = color_1;
|
|
|
|
vertices[2].x = width; vertices[2].y = height; vertices[2].z = 0;
|
|
vertices[2].tx = 1.0; vertices[2].ty = 0.0;
|
|
vertices[2].color = color_2;
|
|
|
|
vertices[3].x = 0; vertices[3].y = height; vertices[3].z = 0;
|
|
vertices[3].tx = 0.0; vertices[3].ty = 0.0;
|
|
vertices[3].color = color_2;
|
|
|
|
/* paint the same texture but with a different geometry */
|
|
cogl_set_source (material);
|
|
cogl_polygon (vertices, 4, TRUE);
|
|
|
|
out:
|
|
/* prevent the default clone handler from running */
|
|
g_signal_stop_emission_by_name (actor, "paint");
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
clutter_init (&argc, &argv);
|
|
|
|
ClutterActor *stage;
|
|
|
|
stage = clutter_stage_new ();
|
|
clutter_stage_set_title (CLUTTER_STAGE (stage), "Reflection");
|
|
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
|
|
|
|
ClutterActor *texture;
|
|
GError *error = NULL;
|
|
|
|
texture = clutter_texture_new ();
|
|
clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
|
|
TESTS_DATA_DIR "/redhand.png",
|
|
&error);
|
|
clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
|
|
clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.2));
|
|
|
|
ClutterActor *clone;
|
|
gfloat y_offset = clutter_actor_get_height (texture) + V_PADDING;
|
|
|
|
clone = clutter_clone_new (texture);
|
|
clutter_actor_add_constraint (clone, clutter_bind_constraint_new (texture, CLUTTER_BIND_X, 0.0));
|
|
clutter_actor_add_constraint (clone, clutter_bind_constraint_new (texture, CLUTTER_BIND_Y, y_offset));
|
|
g_signal_connect (clone,
|
|
"paint",
|
|
G_CALLBACK (_clone_paint_cb),
|
|
NULL);
|
|
|
|
clutter_container_add (CLUTTER_CONTAINER (stage), texture, clone, NULL);
|
|
|
|
clutter_actor_show (stage);
|
|
|
|
clutter_main ();
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|