</head>
<body>
<?php
/*
* dithering.php sample program for libcaca php binding
* Copyright (c) 2008 Nicolas Vion <*****@*****.**>
*
* 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 F**k You Want
* to Public License, Version 2, as published by Sam Hocevar. See
* http://www.wtfpl.net/ for more details.
*/
$src = "logo-caca.png";
$img = imagecreatefrompng(dirname(__FILE__) . "/" . $src);
if (!$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");
}
$canvas = caca_create_canvas(100, 40);
caca_dither_bitmap($canvas, 0, 0, caca_get_canvas_width($canvas), caca_get_canvas_height($canvas), $dither, $img);
echo caca_export_string($canvas, "html3");
echo "<img src=\"./{$src}\" alt=\"\" />";
?>
</body>
</html>
function main()
{
global $argc, $argv;
$cols = 0;
$lines = 0;
$font_width = 6;
$font_height = 10;
$format = NULL;
$dither = NULL;
$gamma = $brightness = $contrast = -1.0;
$long_options = array("width:" => 'W', "height:" => 'H', "font-width:" => 'x', "font-height:" => 'y', "format:" => 'f', "dither:" => 'd', "gamma:" => 'g', "brightness:" => 'b', "contrast:" => 'c', "help" => 'h', "version" => 'v');
try {
while ($opt_and_arg = mygetopt("W:H:f:d:g:b:c:hvx:y:", array_keys($long_options))) {
$opt = $opt_and_arg[0];
$arg = $opt_and_arg[1];
if (substr($opt, 0, 2) == '--' && array_key_exists(substr($opt, strlen('--')) . ($arg !== NULL ? ':' : ''), $long_options)) {
$opt = '-' . $long_options[substr($opt, strlen('--')) . ($arg !== NULL ? ':' : '')];
}
switch ($opt) {
case '-W':
/* --width */
$cols = intval($arg);
break;
case '-H':
/* --height */
$lines = intval($arg);
break;
case '-x':
/* --width */
$font_width = intval($arg);
break;
case '-y':
/* --height */
$font_height = intval($arg);
break;
case '-f':
/* --format */
$format = $arg;
break;
case '-d':
/* --dither */
$dither = $arg;
break;
case '-g':
/* --gamma */
$gamma = floatval($arg);
break;
case '-b':
/* --brightness */
$brightness = floatval($arg);
break;
case '-c':
/* --contrast */
$contrast = floatval($arg);
break;
case '-h':
/* --help */
usage($argc, $argv);
return 0;
case '-v':
/* --version */
version();
return 0;
default:
return 1;
}
}
} catch (MygetoptException $e) {
fprintf(STDERR, "%s", $argv[0] . ": " . $e->getMessage() . "\n");
usage($argc, $argv);
return 2;
}
if ($argc != 2) {
fprintf(STDERR, "%s: wrong argument count\n", $argv[0]);
usage($argc, $argv);
return 1;
}
$cv = caca_create_canvas(0, 0);
if (!$cv) {
fprintf(STDERR, "%s: unable to initialise libcaca\n", $argv[0]);
return 1;
}
$i_str = file_get_contents($argv[$argc - 1]);
$i = $i_str ? imagecreatefromstring($i_str) : NULL;
if (!$i) {
fprintf(STDERR, "%s: unable to load %s\n", $argv[0], $argv[$argc - 1]);
return 1;
}
/* Assume a 6×10 font */
if (!$cols && !$lines) {
$cols = 60;
$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
} else {
if ($cols && !$lines) {
$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
} else {
if (!$cols && $lines) {
$cols = $lines * imagesx($i) * $font_height / imagesy($i) / $font_width;
}
}
}
caca_set_canvas_size($cv, $cols, $lines);
caca_set_color_ansi($cv, CACA_DEFAULT, CACA_TRANSPARENT);
caca_clear_canvas($cv);
$i_dither = caca_create_dither($i);
if (!caca_set_dither_algorithm($i_dither, $dither ? $dither : "fstein")) {
fprintf(STDERR, "%s: Can't dither image with algorithm '%s'\n", $argv[0], $dither ? $dither : "fstein");
return -1;
}
if ($brightness != -1) {
caca_set_dither_brightness($i_dither, $brightness);
}
if ($contrast != -1) {
caca_set_dither_contrast($i_dither, $contrast);
}
if ($gamma != -1) {
caca_set_dither_gamma($i_dither, $gamma);
}
caca_dither_bitmap($cv, 0, 0, $cols, $lines, $i_dither, $i);
$export = caca_export_string($cv, $format ? $format : "ansi");
if (!$export) {
fprintf(STDERR, "%s: Can't export to format '%s'\n", $argv[0], $format ? $format : "ansi");
return -1;
} else {
echo $export;
}
return 0;
}
function main()
{
global $file, $filename;
global $argc, $argv;
global $stderr;
$cols = 0;
$lines = 0;
$font_width = 6;
$font_height = 10;
$format = NULL;
$dither = NULL;
$gamma = $brightness = $contrast = -1.0;
$long_options = array("width:" => 'W', "height:" => 'H', "font-width:" => 'x', "font-height:" => 'y', "format:" => 'f', "dither:" => 'd', "gamma:" => 'g', "brightness:" => 'b', "contrast:" => 'c', "help" => 'h', "version" => 'v');
try {
while ($opt_and_arg = mygetopt("W:H:f:d:g:b:c:hvx:y:", array_keys($long_options))) {
$opt = $opt_and_arg[0];
$arg = $opt_and_arg[1];
if (substr($opt, 0, 2) == '--' && array_key_exists(substr($opt, strlen('--')) . ($arg !== NULL ? ':' : ''), $long_options)) {
$opt = '-' . $long_options[substr($opt, strlen('--')) . ($arg !== NULL ? ':' : '')];
}
switch ($opt) {
case '-W':
/* --width */
$cols = intval($arg);
break;
case '-H':
/* --height */
$lines = intval($arg);
break;
case '-x':
/* --width */
$font_width = intval($arg);
break;
case '-y':
/* --height */
$font_height = intval($arg);
break;
case '-f':
/* --format */
$format = $arg;
break;
case '-d':
/* --dither */
$dither = $arg;
break;
case '-g':
/* --gamma */
$gamma = floatval($arg);
break;
case '-b':
/* --brightness */
$brightness = floatval($arg);
break;
case '-c':
/* --contrast */
$contrast = floatval($arg);
break;
case '-h':
/* --help */
usage($argc, $argv);
return 0;
case '-v':
/* --version */
version();
return 0;
default:
return 1;
}
}
} catch (MygetoptException $e) {
$stderr .= $argv[0] . ": " . $e->getMessage() . "\n";
usage($argc, $argv);
return 2;
}
if (!$file && $argc == 2 && $argv[1] == 'logo-caca.png') {
$file = 'logo-caca.png';
$argc = 1;
} else {
if ($filename && $file && $argc == 2 && strtolower(basename($argv[1])) == strtolower(basename($filename))) {
$argc = 1;
}
}
if ($argc == 2) {
$stderr .= sprintf("%s: image not found\n", $argv[1]);
return 1;
}
if ($argc > 2) {
$stderr .= sprintf("%s: too many arguments\n", $argv[0]);
usage($argc, $argv);
return 1;
}
if (!$file) {
$stderr .= sprintf("%s: no image was provided\n", $argv[0]);
usage($argc, $argv);
return 1;
}
$cv = caca_create_canvas(0, 0);
if (!$cv) {
$stderr .= sprintf("%s: unable to initialise libcaca\n", $argv[0]);
return 1;
}
$i_str = $file ? file_get_contents($file) : NULL;
$i = $i_str ? imagecreatefromstring($i_str) : NULL;
if (!$i) {
$stderr .= sprintf("%s: unable to load %s\n", $argv[0], $filename);
return 1;
}
/* Assume a 6×10 font */
if (!$cols && !$lines) {
$cols = 60;
$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
} else {
if ($cols && !$lines) {
$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
} else {
if (!$cols && $lines) {
$cols = $lines * imagesx($i) * $font_height / imagesy($i) / $font_width;
}
}
}
caca_set_canvas_size($cv, $cols, $lines);
caca_set_color_ansi($cv, CACA_DEFAULT, CACA_TRANSPARENT);
caca_clear_canvas($cv);
$i_dither = caca_create_dither($i);
if (!caca_set_dither_algorithm($i_dither, $dither ? $dither : "fstein")) {
$stderr .= sprintf("%s: Can't dither image with algorithm '%s'\n", $argv[0], $dither ? $dither : "fstein");
return -1;
}
if ($brightness != -1) {
caca_set_dither_brightness($i_dither, $brightness);
}
if ($contrast != -1) {
caca_set_dither_contrast($i_dither, $contrast);
}
if ($gamma != -1) {
caca_set_dither_gamma($i_dither, $gamma);
}
caca_dither_bitmap($cv, 0, 0, $cols, $lines, $i_dither, $i);
$format = $format ? $format : 'html';
$export = caca_export_string($cv, $format);
if (!$export) {
$stderr .= sprintf("%s: Can't export to format '%s'\n", $argv[0], $format);
return -1;
} else {
$content_type_map = array('ansi' => 'text/plain; charset=CP437', 'utf8' => 'text/plain; charset=UTF-8', 'utf8cr' => 'text/plain; charset=UTF-8', 'html' => 'text/html; charset=UTF-8', 'html3' => 'text/html; charset=UTF-8', 'bbfr' => 'text/plain; charset=UTF-8', 'irc' => 'text/plain; charset=UTF-8', 'ps' => 'application/postscript', 'svg' => 'image/svg+xml', 'tga' => 'image/x-targa');
$download_extension_map = array('caca' => 'caca', 'ansi' => 'txt', 'utf8' => 'txt', 'utf8cr' => 'txt', 'irc' => 'txt', 'tga' => 'tga');
$inline_extension_map = array('bbfr' => 'txt', 'ps' => 'ps', 'svg' => 'svg');
if (!array_key_exists($format, $content_type_map)) {
$content_type = 'application/octet-stream';
} else {
$content_type = $content_type_map[$format];
}
header('Content-Type: ' . $content_type);
if (array_key_exists($format, $download_extension_map)) {
header('Content-Disposition: attachment; filename=export.' . $download_extension_map[$format]);
} else {
if (array_key_exists($format, $inline_extension_map)) {
header('Content-Disposition: inline; filename=export.' . $inline_extension_map[$format]);
}
}
echo $export;
}
return 0;
}
function bitmap($canvas, $x, $y, $width, $height, $load_palette = true)
{
return caca_dither_bitmap($canvas->get_resource(), $x, $y, $width, $height, $this->dt, $this->img, $load_palette);
}
}
} else {
$cv = caca_create_canvas(WIDTH, HEIGHT);
for ($y = 0; $y < 256; $y++) {
for ($x = 0; $x < 256; $x++) {
$r = $x;
$g = (255 - $y + $x) / 2;
$b = $y * (255 - $x) / 256;
imagesetpixel($pixels, $x, $y, imagecolorallocate($pixels, $r, $g, $b));
}
}
$dither = caca_create_dither($pixels);
if ($format == "ansi" || $format == "utf8") {
caca_set_dither_charset($dither, "shades");
}
caca_dither_bitmap($cv, 0, 0, caca_get_canvas_width($cv), caca_get_canvas_height($cv), $dither, $pixels);
caca_set_color_ansi($cv, CACA_WHITE, CACA_BLACK);
caca_draw_thin_box($cv, 0, 0, WIDTH - 1, HEIGHT - 1);
caca_set_color_ansi($cv, CACA_BLACK, CACA_WHITE);
caca_fill_ellipse($cv, WIDTH / 2, HEIGHT / 2, WIDTH / 4, HEIGHT / 4, ord(' '));
caca_set_color_ansi($cv, CACA_LIGHTGRAY, CACA_BLACK);
caca_put_str($cv, WIDTH / 2 - 12, HEIGHT / 2 - 6, " lightgray on black ");
caca_set_color_ansi($cv, CACA_DEFAULT, CACA_TRANSPARENT);
caca_put_str($cv, WIDTH / 2 - 12, HEIGHT / 2 - 5, " default on transparent ");
caca_set_color_ansi($cv, CACA_BLACK, CACA_WHITE);
caca_put_str($cv, WIDTH / 2 - 12, HEIGHT / 2 - 4, " black on white ");
caca_set_color_ansi($cv, CACA_BLACK, CACA_WHITE);
caca_put_str($cv, WIDTH / 2 - 8, HEIGHT / 2 - 3, "[<><><><> <>--<>]");
caca_put_str($cv, WIDTH / 2 - 8, HEIGHT / 2 - 2, "[ドラゴン ボーレ]");
caca_put_str($cv, WIDTH / 2 - 7, HEIGHT / 2 + 2, "äβç ░▒▓█▓▒░ ΔЗҒ");
caca_put_str($cv, WIDTH / 2 - 5, HEIGHT / 2 + 4, "(\") \\o/ <&>");
