74de3cfdf3
Add an effects chapter which gives a broad overview of the abstract classes in the effects API, plus a short example of how to apply one of the stock Clutter effects (ClutterColorizeEffect). The recipe explains how to create a custom ClutterDeformEffect to produce a page fold (code based on ClutterPageTurnEffect). The example code includes the effect class plus a small application to apply it to a texture.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
#include <clutter/clutter.h>
|
|
|
|
int
|
|
main (int argc,
|
|
char *argv[])
|
|
{
|
|
ClutterActor *stage;
|
|
ClutterActor *texture;
|
|
ClutterConstraint *constraint_x;
|
|
ClutterConstraint *constraint_y;
|
|
ClutterColor *pink;
|
|
ClutterEffect *effect;
|
|
gchar *filename;
|
|
|
|
if (argc < 2)
|
|
{
|
|
g_print ("Usage: %s <path to image file>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
filename = argv[1];
|
|
|
|
clutter_init (&argc, &argv);
|
|
|
|
stage = clutter_stage_new ();
|
|
clutter_actor_set_size (stage, 400, 400);
|
|
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
|
|
|
|
texture = clutter_texture_new ();
|
|
clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (texture), TRUE);
|
|
clutter_actor_set_width (texture, 300);
|
|
|
|
/* NB ignoring missing file errors here for brevity */
|
|
clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
|
|
filename,
|
|
NULL);
|
|
|
|
/* align the texture on the x and y axes */
|
|
constraint_x = clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5);
|
|
constraint_y = clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5);
|
|
clutter_actor_add_constraint (texture, constraint_x);
|
|
clutter_actor_add_constraint (texture, constraint_y);
|
|
|
|
/* create a colorize effect with pink tint */
|
|
pink = clutter_color_new (230, 187, 210, 255);
|
|
effect = clutter_colorize_effect_new (pink);
|
|
|
|
/* apply the effect to the texture */
|
|
clutter_actor_add_effect (texture, effect);
|
|
|
|
clutter_container_add_actor (CLUTTER_CONTAINER (stage), texture);
|
|
|
|
clutter_actor_show (stage);
|
|
|
|
clutter_main ();
|
|
|
|
return 0;
|
|
}
|