/usr/share/clutter-1.0/cookbook/examples/textures-crossfade-slideshow.c is in libclutter-1.0-doc 1.20.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | /*
* Simple slideshow application, cycling images between
* two ClutterTextures
*
* Run by passing one or more image paths or directory globs
* which will pick up image files
*
* When running, press any key to go to the next image
*/
#include <stdlib.h>
#include <clutter/clutter.h>
static guint stage_side = 600;
static guint animation_duration_ms = 1500;
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
typedef struct {
ClutterActor *top;
ClutterActor *bottom;
ClutterState *transitions;
GSList *image_paths;
guint next_image_index;
} State;
static gboolean
load_next_image (State *app)
{
gpointer next;
gchar *image_path;
CoglHandle *cogl_texture;
GError *error = NULL;
/* don't do anything if already animating */
ClutterTimeline *timeline = clutter_state_get_timeline (app->transitions);
if (clutter_timeline_is_playing (timeline) == 1)
{
g_debug ("Animation is running already");
return FALSE;
}
if (!app->next_image_index)
app->next_image_index = 0;
next = g_slist_nth_data (app->image_paths, app->next_image_index);
if (next == NULL)
return FALSE;
image_path = (gchar *)next;
g_debug ("Loading %s", image_path);
cogl_texture = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (app->top));
if (cogl_texture != NULL)
{
/* copy the current texture into the background */
clutter_texture_set_cogl_texture (CLUTTER_TEXTURE (app->bottom), cogl_texture);
/* make the bottom opaque and top transparent */
clutter_state_warp_to_state (app->transitions, "show-bottom");
}
/* load the next image into the top */
clutter_texture_set_from_file (CLUTTER_TEXTURE (app->top),
image_path,
&error);
if (error != NULL)
{
g_warning ("Error loading %s\n%s", image_path, error->message);
g_error_free (error);
return FALSE;
}
/* fade in the top texture and fade out the bottom texture */
clutter_state_set_state (app->transitions, "show-top");
app->next_image_index++;
return TRUE;
}
static gboolean
_key_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
State *app = (State *)user_data;
load_next_image (app);
return TRUE;
}
int
main (int argc, char *argv[])
{
State *app = g_new0 (State, 1);
guint i;
GError *error = NULL;
/* UI */
ClutterActor *stage;
ClutterLayoutManager *layout;
ClutterActor *box;
if (argc < 2)
{
g_print ("Usage: %s <image paths to load>\n", argv[0]);
exit (EXIT_FAILURE);
}
app->image_paths = NULL;
/*
* NB if your shell globs arguments to this program so argv
* includes non-image files, they will fail to load and throw errors
*/
for (i = 1; i < argc; i++)
app->image_paths = g_slist_append (app->image_paths, argv[i]);
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
stage = clutter_stage_new ();
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
clutter_stage_set_title (CLUTTER_STAGE (stage), "cross-fade");
clutter_actor_set_size (stage, stage_side, stage_side);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_BIN_ALIGNMENT_CENTER);
box = clutter_box_new (layout);
clutter_actor_set_size (box, stage_side, stage_side);
app->bottom = clutter_texture_new ();
clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (app->bottom), TRUE);
app->top = clutter_texture_new ();
clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (app->top), TRUE);
clutter_container_add_actor (CLUTTER_CONTAINER (box), app->bottom);
clutter_container_add_actor (CLUTTER_CONTAINER (box), app->top);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), box);
/* animations */
app->transitions = clutter_state_new ();
clutter_state_set (app->transitions, NULL, "show-top",
app->top, "opacity", CLUTTER_EASE_IN_CUBIC, 255,
app->bottom, "opacity", CLUTTER_EASE_IN_CUBIC, 0,
NULL);
clutter_state_set (app->transitions, NULL, "show-bottom",
app->top, "opacity", CLUTTER_LINEAR, 0,
app->bottom, "opacity", CLUTTER_LINEAR, 255,
NULL);
clutter_state_set_duration (app->transitions,
NULL,
NULL,
animation_duration_ms);
/* display the next (first) image */
load_next_image (app);
/* key press displays the next image */
g_signal_connect (stage,
"key-press-event",
G_CALLBACK (_key_pressed_cb),
app);
clutter_actor_show (stage);
clutter_main ();
g_slist_free (app->image_paths);
g_object_unref (app->transitions);
g_free (app);
if (error != NULL)
g_error_free (error);
return EXIT_SUCCESS;
}
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