c230fd8dfd
Modified the code example for the Clutter API version of the cross-fade to use the same command line as the COGL version. This also simplifies the explanation in the recipe. Also made the COGL code sample more consistent with the Clutter API code sample.
134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
#include <stdlib.h>
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#include <clutter/clutter.h>
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static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
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static gchar *source = NULL;
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static gchar *target = NULL;
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static guint duration = 1000;
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static GOptionEntry entries[] = {
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{
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"source", 's',
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0,
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G_OPTION_ARG_FILENAME, &source,
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"The source image of the cross-fade", "FILE"
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},
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{
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"target", 't',
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0,
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G_OPTION_ARG_FILENAME, &target,
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"The target image of the cross-fade", "FILE"
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},
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{
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"duration", 'd',
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0,
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G_OPTION_ARG_INT, &duration,
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"The duration of the cross-fade, in milliseconds", "MSECS"
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},
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{ NULL }
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};
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static gboolean
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load_image (ClutterTexture *texture,
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gchar *image_path)
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{
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GError *error = NULL;
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gboolean success = clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
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image_path,
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&error);
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if (error != NULL)
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{
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g_warning ("Error loading %s\n%s", image_path, error->message);
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g_error_free (error);
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exit (EXIT_FAILURE);
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}
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return success;
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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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clutter_init_with_args (&argc, &argv,
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" - cross-fade", entries,
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NULL,
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NULL);
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if (source == NULL || target == NULL)
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{
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g_print ("Usage: %s -s <source> -t <target> [-d <duration>]\n", argv[0]);
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exit (EXIT_FAILURE);
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}
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GError *error = NULL;
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/* UI */
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ClutterActor *stage;
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ClutterLayoutManager *layout;
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ClutterActor *box;
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ClutterActor *front, *back;
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ClutterState *transitions;
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clutter_init (&argc, &argv);
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stage = clutter_stage_get_default ();
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clutter_stage_set_title (CLUTTER_STAGE (stage), "cross-fade");
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clutter_actor_set_size (stage, 600, 600);
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clutter_actor_show (stage);
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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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_actor_set_size (box, 600, 600);
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back = clutter_texture_new ();
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clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (back), TRUE);
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front = clutter_texture_new ();
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clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (front), TRUE);
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clutter_container_add_actor (CLUTTER_CONTAINER (box), back);
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clutter_container_add_actor (CLUTTER_CONTAINER (box), front);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), box);
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/* animations */
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transitions = clutter_state_new ();
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clutter_state_set (transitions, NULL, "show-front",
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front, "opacity", CLUTTER_EASE_IN_CUBIC, 255,
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back, "opacity", CLUTTER_EASE_IN_CUBIC, 0,
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NULL);
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clutter_state_set (transitions, NULL, "show-back",
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front, "opacity", CLUTTER_LINEAR, 0,
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back, "opacity", CLUTTER_LINEAR, 255,
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NULL);
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clutter_state_set_duration (transitions, NULL, NULL, duration);
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/* make the back opaque and front transparent */
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clutter_state_warp_to_state (transitions, "show-back");
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/* load the first image into the back */
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load_image (CLUTTER_TEXTURE (back), source);
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/* load the second image into the front */
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load_image (CLUTTER_TEXTURE (front), target);
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/* fade in the front texture and fade out the back texture */
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clutter_state_set_state (transitions, "show-front");
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clutter_actor_show (stage);
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clutter_main ();
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g_object_unref (transitions);
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if (error != NULL)
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g_error_free (error);
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return EXIT_SUCCESS;
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}
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