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027e1a717f
We don't have a tests/data directory any more since the test suites reorganization; the cookbook examples, though, rely on the existence of the redhand.png image. In order to fix them, we copy the file in the examples directory, and we reference it directly. Since we need it for the examples, and we install the example code, it's also necessary to add the image to the EXTRA_DIST rule.
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
#include <stdlib.h>
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#include <clutter/clutter.h>
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/* pixels between the source and its reflection */
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#define V_PADDING 4
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static void
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_clone_paint_cb (ClutterActor *actor)
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{
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ClutterActor *source;
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ClutterActorBox box;
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CoglHandle material;
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gfloat width, height;
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guint8 opacity;
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CoglColor color_1, color_2;
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CoglTextureVertex vertices[4];
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/* if we don't have a source actor, don't paint */
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source = clutter_clone_get_source (CLUTTER_CLONE (actor));
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if (source == NULL)
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goto out;
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/* if the source texture does not have any content, don't paint */
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material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (source));
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if (material == NULL)
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goto out;
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/* get the size of the reflection */
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clutter_actor_get_allocation_box (actor, &box);
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clutter_actor_box_get_size (&box, &width, &height);
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/* get the composite opacity of the actor */
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opacity = clutter_actor_get_paint_opacity (actor);
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/* figure out the two colors for the reflection: the first is
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* full color and the second is the same, but at 0 opacity
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*/
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cogl_color_init_from_4f (&color_1, 1.0, 1.0, 1.0, opacity / 255.);
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cogl_color_premultiply (&color_1);
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cogl_color_init_from_4f (&color_2, 1.0, 1.0, 1.0, 0.0);
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cogl_color_premultiply (&color_2);
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/* now describe the four vertices of the quad; since it has
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* to be a reflection, we need to invert it as well
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*/
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vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0;
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vertices[0].tx = 0.0; vertices[0].ty = 1.0;
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vertices[0].color = color_1;
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vertices[1].x = width; vertices[1].y = 0; vertices[1].z = 0;
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vertices[1].tx = 1.0; vertices[1].ty = 1.0;
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vertices[1].color = color_1;
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vertices[2].x = width; vertices[2].y = height; vertices[2].z = 0;
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vertices[2].tx = 1.0; vertices[2].ty = 0.0;
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vertices[2].color = color_2;
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vertices[3].x = 0; vertices[3].y = height; vertices[3].z = 0;
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vertices[3].tx = 0.0; vertices[3].ty = 0.0;
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vertices[3].color = color_2;
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/* paint the same texture but with a different geometry */
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cogl_set_source (material);
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cogl_polygon (vertices, 4, TRUE);
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out:
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/* prevent the default clone handler from running */
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g_signal_stop_emission_by_name (actor, "paint");
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}
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int
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main (int argc, char *argv[])
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{
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ClutterActor *stage;
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ClutterActor *texture;
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GError *error = NULL;
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ClutterActor *clone;
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gfloat y_offset;
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if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
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return 1;
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stage = clutter_stage_new ();
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clutter_stage_set_title (CLUTTER_STAGE (stage), "Reflection");
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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texture = clutter_texture_new ();
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clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
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"redhand.png",
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&error);
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clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
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clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.2));
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y_offset = clutter_actor_get_height (texture) + V_PADDING;
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clone = clutter_clone_new (texture);
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clutter_actor_add_constraint (clone, clutter_bind_constraint_new (texture, CLUTTER_BIND_X, 0.0));
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clutter_actor_add_constraint (clone, clutter_bind_constraint_new (texture, CLUTTER_BIND_Y, y_offset));
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g_signal_connect (clone,
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"paint",
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G_CALLBACK (_clone_paint_cb),
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NULL);
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clutter_container_add (CLUTTER_CONTAINER (stage), texture, clone, NULL);
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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