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https://github.com/brl/mutter.git
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81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
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/*
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* Display multiple rotated copies of an image on top of each other
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*
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* Invoke with the path to a file to load a custom image
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*/
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#include <clutter/clutter.h>
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#define STAGE_SIDE 512
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static const ClutterColor box_color = { 0x33, 0x33, 0x55, 0xff };
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int
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main (int argc, char *argv[])
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{
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gchar *filename = TESTS_DATA_DIR "/redhand.png";
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if (argc > 1)
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filename = argv[1];
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ClutterLayoutManager *layout;
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ClutterActor *box;
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ClutterActor *stage;
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ClutterActor *texture;
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CoglHandle *cogl_texture;
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GError *error = NULL;
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gfloat width;
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clutter_init (&argc, &argv);
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stage = clutter_stage_get_default ();
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clutter_actor_set_size (stage, STAGE_SIDE, STAGE_SIDE);
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layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
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CLUTTER_BIN_ALIGNMENT_CENTER);
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box = clutter_box_new (layout);
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clutter_box_set_color (CLUTTER_BOX (box), &box_color);
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texture = clutter_texture_new_from_file (filename, &error);
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if (error != NULL)
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g_error ("Error loading file %s; message was:\n%s",
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filename,
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error->message);
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/*
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* get a reference to the underlying Cogl texture
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* for copying onto each Clutter texture placed into the layout
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*/
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cogl_texture = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (texture));
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/*
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* add gradually turning and shrinking textures,
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* smallest one last; each actor ends up on top
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* of the one added just before it
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*/
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for (width = STAGE_SIDE * 0.75; width >= STAGE_SIDE * 0.0625; width -= STAGE_SIDE * 0.0625)
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{
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ClutterActor *texture_copy = clutter_texture_new ();
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clutter_texture_set_cogl_texture (CLUTTER_TEXTURE (texture_copy),
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cogl_texture);
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clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (texture_copy),
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TRUE);
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clutter_actor_set_z_rotation_from_gravity (texture_copy,
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(gfloat)(width * 0.5) - (STAGE_SIDE * 0.03125),
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CLUTTER_GRAVITY_CENTER);
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clutter_actor_set_width (texture_copy, width);
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clutter_container_add_actor (CLUTTER_CONTAINER (box), texture_copy);
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}
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clutter_actor_add_constraint (box, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
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clutter_actor_add_constraint (box, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5));
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), box);
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clutter_actor_show (stage);
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clutter_main ();
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return 0;
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}
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