mutter/tests/test-textures.c

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#include <clutter/clutter.h>
GdkPixbuf*
make_pixbuf (int width, int height, int bpp, int has_alpha)
{
#define CHECK_SIZE 20
GdkPixbuf *px;
gint x,y, rowstride, n_channels, i = 0;
guchar *pixels;
px = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
has_alpha,
8,
width,
height);
if (!px) return NULL;
rowstride = gdk_pixbuf_get_rowstride (px);
n_channels = gdk_pixbuf_get_n_channels (px);
for (y=0; y<height; y++)
{
i = 0;
for (x=0; x<width; x++)
{
guchar *p, r, g, b, a;
p = gdk_pixbuf_get_pixels (px) + y * rowstride + x * n_channels;
p[0] = p[1] = p[2] = 0; p[3] = 0xff;
if (x && y && y % CHECK_SIZE && x % CHECK_SIZE)
{
if (x % CHECK_SIZE == 1)
{
if (++i > 3)
i = 0;
}
p[i] = 0xff;
}
}
}
return px;
}
#define SPIN() while (g_main_context_pending (NULL)) \
g_main_context_iteration (NULL, FALSE);
int
main (int argc, char *argv[])
{
ClutterActor *texture;
ClutterActor *stage;
GdkPixbuf *pixbuf;
gint i, j, cols, rows;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
clutter_actor_show_all (CLUTTER_ACTOR (stage));
SPIN();
for (i=100; i<5000; i += 100)
for (j=0; j<4; j++)
{
pixbuf = make_pixbuf (i+j, i+j, 4, TRUE);
if (!pixbuf)
g_error("%ix%i pixbuf creation failed", i+j, i+j);
printf("o %ix%i pixbuf... ", i+j, i+j);
texture = clutter_texture_new_from_pixbuf (pixbuf);
g_object_unref (pixbuf);
if (!texture)
g_error("Pixbuf creation failed");
printf("uploaded to texture... ");
clutter_group_add (CLUTTER_GROUP (stage), texture);
clutter_actor_set_size (texture, 400, 400);
clutter_actor_show (texture);
clutter_texture_get_n_tiles(CLUTTER_TEXTURE(texture), &cols, &rows);
printf("with tiles: %i x %i\n", cols, rows);
SPIN();
clutter_group_remove (CLUTTER_GROUP (stage), texture);
}
return 0;
}