531 lines
16 KiB
PHP
531 lines
16 KiB
PHP
<?php
|
||
/*
|
||
* img2txt image to text converter
|
||
* Copyright (c) 2008 Benjamin C. Wiley Sittler <bsittler@gmail.com>
|
||
*
|
||
* This file is a Php port of "src/img2txt.c"
|
||
* which is:
|
||
* Copyright (c) 2006 Sam Hocevar <sam@hocevar.net>
|
||
* 2007 Jean-Yves Lamoureux <jylam@lnxscene.org>
|
||
* All Rights Reserved
|
||
*
|
||
* 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.
|
||
*/
|
||
|
||
$img2txt_php = isset($_SERVER['SCRIPT_NAME'])
|
||
?
|
||
$_SERVER['SCRIPT_NAME']
|
||
:
|
||
'img2txt.php';
|
||
|
||
$argv = array(basename($img2txt_php));
|
||
$file = isset($_FILES['file']) ? $_FILES['file']['tmp_name'] : NULL;
|
||
$filename = isset($_FILES['file']) ? $_FILES['file']['name'] : NULL;
|
||
$args = NULL;
|
||
if(isset($_REQUEST['args']))
|
||
{
|
||
$args = trim($_REQUEST['args']);
|
||
if(strlen($args))
|
||
{
|
||
foreach(explode(' ', $args) as $arg)
|
||
{
|
||
$argv[] = $arg;
|
||
}
|
||
}
|
||
}
|
||
$argc = count($argv);
|
||
$stderr = '';
|
||
$stdout = '';
|
||
|
||
class MygetoptException extends Exception
|
||
{
|
||
}
|
||
|
||
$myoptind = 0;
|
||
|
||
function mygetopt($shortopts, $longopts)
|
||
{
|
||
global $argc, $argv, $myoptind;
|
||
if($myoptind < 0)
|
||
{
|
||
$myoptind = 0;
|
||
}
|
||
if(($myoptind + 1) >= $argc)
|
||
{
|
||
return NULL;
|
||
}
|
||
$myoptind ++;
|
||
$nextarg = $argv[$myoptind];
|
||
$ret = NULL;
|
||
if((substr($nextarg, 0, 1) != '-')
|
||
||
|
||
($nextarg == '-'))
|
||
{
|
||
$myoptind = $argc - 1;
|
||
}
|
||
else
|
||
{
|
||
$skipopt = $myoptind;
|
||
$skipopts = 1;
|
||
if($nextarg == '--')
|
||
{
|
||
$myoptind = $argc - 1;
|
||
}
|
||
else
|
||
{
|
||
$opt = NULL;
|
||
$arg = NULL;
|
||
foreach($longopts as $longopt)
|
||
{
|
||
$optional = false;
|
||
$hasarg = false;
|
||
if(($longopt != '::') && substr($longopt, -2) == '::')
|
||
{
|
||
$optional = true;
|
||
$hasarg = true;
|
||
$longopt = substr($longopt, 0, -2);
|
||
}
|
||
else if(($longopt != ':') && substr($longopt, -1) == ':')
|
||
{
|
||
$optional = false;
|
||
$hasarg = true;
|
||
$longopt = substr($longopt, 0, -1);
|
||
}
|
||
if($nextarg == ('--' . $longopt))
|
||
{
|
||
$opt = '--' . $longopt;
|
||
if($hasarg && ! $optional)
|
||
{
|
||
if(($myoptind + 1) < $argc)
|
||
{
|
||
$myoptind ++;
|
||
$skipopts ++;
|
||
$arg = $argv[$myoptind];
|
||
}
|
||
else
|
||
{
|
||
throw new MygetoptException("option \"$opt\" requires an argument");
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
else if(substr($nextarg, 0, strlen('--' . $longopt . '='))
|
||
==
|
||
('--' . $longopt . '='))
|
||
{
|
||
$opt = '--' . $longopt;
|
||
$arg = substr($nextarg, strlen($opt . '='));
|
||
if(! $hasarg)
|
||
{
|
||
throw new MygetoptException("option \"$opt\" does not allow an argument");
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
if($opt === NULL)
|
||
{
|
||
for($i = 0; $i < strlen($shortopts); $i ++)
|
||
{
|
||
$optional = false;
|
||
$hasarg = false;
|
||
$shortopt = substr($shortopts, $i, 1);
|
||
if(substr($shortopts, $i + 1, 2) == '::')
|
||
{
|
||
$optional = true;
|
||
$hasarg = true;
|
||
$i += 2;
|
||
}
|
||
else if(substr($shortopts, $i + 1, 1) == ':')
|
||
{
|
||
$hasarg = true;
|
||
}
|
||
if($nextarg
|
||
==
|
||
('-' . $shortopt))
|
||
{
|
||
$opt = '-' . $shortopt;
|
||
if($hasarg && ! $optional)
|
||
{
|
||
if(($myoptind + 1) < $argc)
|
||
{
|
||
$myoptind ++;
|
||
$skipopts ++;
|
||
$arg = $argv[$myoptind];
|
||
}
|
||
else
|
||
{
|
||
throw new MygetoptException("option \"$opt\" requires an argument");
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
else if(substr($nextarg, 0, strlen('-' . $shortopt))
|
||
==
|
||
('-' . $shortopt))
|
||
{
|
||
$opt = '-' . $shortopt;
|
||
if($hasarg)
|
||
{
|
||
$arg = substr($nextarg, strlen($opt));
|
||
}
|
||
else
|
||
{
|
||
$argv[$myoptind] = '-' . substr($nextarg, strlen($opt));
|
||
$myoptind --;
|
||
$skipopts = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if($opt === NULL)
|
||
{
|
||
if(substr($nextarg, 0, strlen('--')) == '--')
|
||
{
|
||
$longopt = substr($nextarg, strlen('--'));
|
||
if(strpos($longopt, '=') !== false)
|
||
{
|
||
$longopt = substr($longopt, 0, strpos($longopt, '='));
|
||
}
|
||
throw new MygetoptException("option \"--$longopt\" is not recognized");
|
||
}
|
||
$shortopt = substr($nextarg, strlen('-'), 1);
|
||
throw new MygetoptException("option \"-$shortopt\" is not recognized");
|
||
}
|
||
$ret = array($opt, $arg);
|
||
}
|
||
if ($skipopts > 0)
|
||
{
|
||
for($i = 0; $i < $argc; $i ++)
|
||
{
|
||
if(($i < $skipopt) || ($i >= ($skipopt + $skipopts)))
|
||
{
|
||
$new_argv[] = $argv[$i];
|
||
}
|
||
}
|
||
if($myoptind >= $skipopt)
|
||
{
|
||
$myoptind -= $skipopts;
|
||
}
|
||
$argv = $new_argv;
|
||
$argc = count($argv);
|
||
}
|
||
}
|
||
return $ret;
|
||
}
|
||
|
||
function usage($argc, $argv)
|
||
{
|
||
global $stdout;
|
||
$stdout .= sprintf("Usage: %s [OPTIONS]... <IMAGE>\n", $argv[0]);
|
||
$stdout .= sprintf("Convert IMAGE to any text based available format.\n");
|
||
$stdout .= sprintf("Example : -W 80 -f html logo-caca.png\n\n", $argv[0]);
|
||
$stdout .= sprintf("Options:\n");
|
||
$stdout .= sprintf(" -h, --help\t\t\tThis help\n");
|
||
$stdout .= sprintf(" -v, --version\t\t\tVersion of the program\n");
|
||
$stdout .= sprintf(" -W, --width=WIDTH\t\tWidth of resulting image\n");
|
||
$stdout .= sprintf(" -H, --height=HEIGHT\t\tHeight of resulting image\n");
|
||
$stdout .= sprintf(" -x, --font-width=WIDTH\t\tWidth of output font\n");
|
||
$stdout .= sprintf(" -y, --font-height=HEIGHT\t\tHeight of output font\n");
|
||
$stdout .= sprintf(" -b, --brightness=BRIGHTNESS\tBrightness of resulting image\n");
|
||
$stdout .= sprintf(" -c, --contrast=CONTRAST\tContrast of resulting image\n");
|
||
$stdout .= sprintf(" -g, --gamma=GAMMA\t\tGamma of resulting image\n");
|
||
$stdout .= sprintf(" -d, --dither=DITHER\t\tDithering algorithm to use :\n");
|
||
$list = caca_get_dither_algorithm_list(caca_create_dither(imagecreate(1, 1)));
|
||
foreach($list as $type => $name)
|
||
{
|
||
$stdout .= sprintf("\t\t\t%s: %s\n", $type, $name);
|
||
}
|
||
|
||
$stdout .= sprintf(" -f, --format=FORMAT\t\tFormat of the resulting image :\n");
|
||
$list = caca_get_export_list();
|
||
foreach($list as $type => $name)
|
||
{
|
||
$stdout .= sprintf("\t\t\t%s: %s\n", $type, $name);
|
||
}
|
||
}
|
||
|
||
function version()
|
||
{
|
||
global $stdout;
|
||
$stdout .= sprintf(
|
||
"img2txt Copyright 2006-2007 Sam Hocevar and Jean-Yves Lamoureux\n" .
|
||
" Copyright 2008 Benjamin C. Wiley Sittler\n" .
|
||
"Internet: <sam@hocevar.net> <jylam@lnxscene.org>\n" .
|
||
" <bsittler@gmail.com> Version: %s\n" .
|
||
"\n" .
|
||
"img2txt, along with its documentation, may be freely copied and distributed.\n" .
|
||
"\n" .
|
||
"The latest version of img2txt is available from the web site,\n" .
|
||
" http://caca.zoy.org/wiki/libcaca in the libcaca package.\n" .
|
||
"\n",
|
||
caca_get_version());
|
||
}
|
||
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;
|
||
}
|
||
$ret = 1;
|
||
if(isset($_REQUEST['args']) || $file)
|
||
{
|
||
$ret = main();
|
||
}
|
||
if($ret || strlen($stdout) || strlen($stderr))
|
||
{
|
||
header('Content-Type: text/html; charset=UTF-8');
|
||
?>
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||
<head>
|
||
<title>image to text converter</title>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
||
</head>
|
||
<body>
|
||
<form id="img2txtform" name="img2txtform" action="#" enctype="multipart/form-data" method="post">
|
||
<label for="file">Image:</label>
|
||
<input id="file" name="file" type="file" />
|
||
<br />
|
||
<label for="args">Options:</label>
|
||
<input id="args" name="args" type="text" value="<?= isset($_REQUEST['args']) ? htmlspecialchars($_REQUEST['args']) : '' ?>" size="80" />
|
||
<br />
|
||
<input type="submit" /> <input type="reset" />
|
||
</form>
|
||
<?php
|
||
;
|
||
if(strlen($stderr))
|
||
{
|
||
?><pre xml:space="preserve"><strong><?= htmlspecialchars($stderr) ?></strong></pre><?php
|
||
;
|
||
}
|
||
if(strlen($stdout))
|
||
{
|
||
?><pre xml:space="preserve"><?= preg_replace('!([&]lt;)([.a-zA-Z0-9]+[@])([-.a-zA-Z0-9]+)([&]gt;)!', '$1<a href="mailto:$2$3">$2...</a>$4', preg_replace('!(\s|^)(https?://[-.:_/0-9a-zA-Z%?=&;#]+)(\s|$)!', '$1<a href="$2">$2</a>$3', htmlspecialchars($stdout))) ?></pre><?php
|
||
;
|
||
}
|
||
?>
|
||
</body>
|
||
</html>
|
||
<?php
|
||
;
|
||
}
|
||
?>
|