libcaca/caca-php/examples/dithering.php

#!/usr/bin/php5
<?php
/*
 *  dithering.php      sample program for libcaca php binding
 *  Copyright (c) 2008 Nicolas Vion <nico@yojik.eu>
 *
 *  This program is free software. It comes without any warranty, to
 *  the extent permitted by applicable law. You can redistribute it
 *  and/or modify it under the terms of the Do What the Fuck You Want
 *  to Public License, Version 2, as published by Sam Hocevar. See
 *  http://www.wtfpl.net/ for more details.
 */

if (php_sapi_name() != "cli") {
    die("You have to run this program with php-cli!\n");
}

$img = imagecreatefrompng(dirname(__FILE__)."/logo-caca.png");
if (!$img)  {
    die("Can not open image.\n");
}

$dither = caca_create_dither($img);
if (!$dither)  {
    die("Can not create dither. Maybe you compiled caca-php without gd support.\n");
}

$canvas = caca_create_canvas(0, 0);
$display = caca_create_display($canvas);
if (!$display)  {
    die("Can not create display.\n");
}

caca_dither_bitmap($canvas, 0, 0, caca_get_canvas_width($canvas), caca_get_canvas_height($canvas), $dither, $img);
caca_refresh_display($display);

caca_get_event($display, CACA_EVENT_KEY_PRESS, -1);

?>