/* Returns a copy of pixbuf scaled down, preserving aspect ratio, to fit
* within the specified width and height. If it already fits, a copy of
* the original, without scaling, is returned.
*/
GdkPixbuf *
eel_gdk_pixbuf_scale_down_to_fit (GdkPixbuf *pixbuf, int max_width, int max_height)
{
int scaled_width;
int scaled_height;
double scale_factor;
scale_factor = eel_gdk_scale_to_fit_factor (gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf),
max_width, max_height,
&scaled_width, &scaled_height);
if (scale_factor >= 1.0) {
return gdk_pixbuf_copy (pixbuf);
} else {
return eel_gdk_pixbuf_scale_down (pixbuf, scaled_width, scaled_height);
}
}
int
main (int argc, char* argv[])
{
GdkPixbuf *pixbuf, *scaled;
GError *error;
struct timeval t1, t2;
int i;
test_init (&argc, &argv);
if (argc != 2) {
printf ("Usage: test <image filename>\n");
exit (1);
}
error = NULL;
pixbuf = gdk_pixbuf_new_from_file (argv[1], &error);
if (pixbuf == NULL) {
printf ("error loading pixbuf: %s\n", error->message);
exit (1);
}
printf ("scale factors: %f, %f\n",
(double)gdk_pixbuf_get_width(pixbuf)/DEST_WIDTH,
(double)gdk_pixbuf_get_height(pixbuf)/DEST_HEIGHT);
gettimeofday(&t1, NULL);
for (i = 0; i < N_SCALES; i++) {
scaled = eel_gdk_pixbuf_scale_down (pixbuf, DEST_WIDTH, DEST_HEIGHT);
g_object_unref (scaled);
}
gettimeofday(&t2, NULL);
g_print ("Time for eel_gdk_pixbuf_scale_down: %ld msecs\n",
(t2.tv_sec - t1.tv_sec) * 1000 + (t2.tv_usec - t1.tv_usec) / 1000);
gettimeofday(&t1, NULL);
for (i = 0; i < N_SCALES; i++) {
scaled = gdk_pixbuf_scale_simple (pixbuf, DEST_WIDTH, DEST_HEIGHT, GDK_INTERP_NEAREST);
g_object_unref (scaled);
}
gettimeofday(&t2, NULL);
g_print ("Time for INTERP_NEAREST: %ld msecs\n",
(t2.tv_sec - t1.tv_sec) * 1000 + (t2.tv_usec - t1.tv_usec) / 1000);
gettimeofday(&t1, NULL);
for (i = 0; i < N_SCALES; i++) {
scaled = gdk_pixbuf_scale_simple (pixbuf, DEST_WIDTH, DEST_HEIGHT, GDK_INTERP_BILINEAR);
g_object_unref (scaled);
}
gettimeofday(&t2, NULL);
g_print ("Time for INTERP_BILINEAR: %ld msecs\n",
(t2.tv_sec - t1.tv_sec) * 1000 + (t2.tv_usec - t1.tv_usec) / 1000);
scaled = eel_gdk_pixbuf_scale_down (pixbuf, DEST_WIDTH, DEST_HEIGHT);
gdk_pixbuf_save (scaled, "eel_scaled.png", "png", NULL, NULL);
g_object_unref (scaled);
scaled = gdk_pixbuf_scale_simple (pixbuf, DEST_WIDTH, DEST_HEIGHT, GDK_INTERP_NEAREST);
gdk_pixbuf_save (scaled, "nearest_scaled.png", "png", NULL, NULL);
g_object_unref (scaled);
scaled = gdk_pixbuf_scale_simple (pixbuf, DEST_WIDTH, DEST_HEIGHT, GDK_INTERP_BILINEAR);
gdk_pixbuf_save (scaled, "bilinear_scaled.png", "png", NULL, NULL);
g_object_unref (scaled);
return 0;
}
