397 lines
12 KiB
PHP
Executable File
397 lines
12 KiB
PHP
Executable File
#!/usr/bin/php5
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<?php
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/*
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* img2txt image to text converter
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* Copyright (c) 2008 Benjamin C. Wiley Sittler <bsittler@gmail.com>
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*
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* This file is a Php port of "src/img2txt.c"
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* which is:
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* Copyright (c) 2006 Sam Hocevar <sam@hocevar.net>
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* 2007 Jean-Yves Lamoureux <jylam@lnxscene.org>
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* All Rights Reserved
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*
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* This program is free software. It comes without any warranty, to
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* the extent permitted by applicable law. You can redistribute it
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* and/or modify it under the terms of the Do What the Fuck You Want
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* to Public License, Version 2, as published by Sam Hocevar. See
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* http://www.wtfpl.net/ for more details.
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*/
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if (php_sapi_name() != "cli") {
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die("You have to run this program with php-cli!\n");
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}
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class MygetoptException extends Exception
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{
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}
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$myoptind = 0;
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function mygetopt($shortopts, $longopts)
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{
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global $argc, $argv, $myoptind;
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if($myoptind < 0)
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{
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$myoptind = 0;
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}
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if(($myoptind + 1) >= $argc)
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{
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return NULL;
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}
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$myoptind ++;
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$nextarg = $argv[$myoptind];
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$ret = NULL;
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if((substr($nextarg, 0, 1) != '-')
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||
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($nextarg == '-'))
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{
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$myoptind = $argc - 1;
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}
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else
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{
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$skipopt = $myoptind;
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$skipopts = 1;
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if($nextarg == '--')
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{
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$myoptind = $argc - 1;
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}
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else
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{
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$opt = NULL;
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$arg = NULL;
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foreach($longopts as $longopt)
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{
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$optional = false;
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$hasarg = false;
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if(($longopt != '::') && substr($longopt, -2) == '::')
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{
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$optional = true;
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$hasarg = true;
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$longopt = substr($longopt, 0, -2);
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}
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else if(($longopt != ':') && substr($longopt, -1) == ':')
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{
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$optional = false;
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$hasarg = true;
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$longopt = substr($longopt, 0, -1);
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}
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if($nextarg == ('--' . $longopt))
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{
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$opt = '--' . $longopt;
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if($hasarg && ! $optional)
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{
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if(($myoptind + 1) < $argc)
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{
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$myoptind ++;
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$skipopts ++;
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$arg = $argv[$myoptind];
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}
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else
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{
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throw new MygetoptException("option \"$opt\" requires an argument");
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}
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}
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break;
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}
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else if(substr($nextarg, 0, strlen('--' . $longopt . '='))
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==
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('--' . $longopt . '='))
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{
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$opt = '--' . $longopt;
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$arg = substr($nextarg, strlen($opt . '='));
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if(! $hasarg)
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{
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throw new MygetoptException("option \"$opt\" does not allow an argument");
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}
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break;
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}
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}
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if($opt === NULL)
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{
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for($i = 0; $i < strlen($shortopts); $i ++)
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{
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$optional = false;
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$hasarg = false;
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$shortopt = substr($shortopts, $i, 1);
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if(substr($shortopts, $i + 1, 2) == '::')
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{
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$optional = true;
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$hasarg = true;
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$i += 2;
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}
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else if(substr($shortopts, $i + 1, 1) == ':')
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{
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$hasarg = true;
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}
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if($nextarg
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==
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('-' . $shortopt))
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{
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$opt = '-' . $shortopt;
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if($hasarg && ! $optional)
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{
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if(($myoptind + 1) < $argc)
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{
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$myoptind ++;
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$skipopts ++;
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$arg = $argv[$myoptind];
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}
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else
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{
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throw new MygetoptException("option \"$opt\" requires an argument");
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}
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}
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break;
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}
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else if(substr($nextarg, 0, strlen('-' . $shortopt))
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==
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('-' . $shortopt))
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{
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$opt = '-' . $shortopt;
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if($hasarg)
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{
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$arg = substr($nextarg, strlen($opt));
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}
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else
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{
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$argv[$myoptind] = '-' . substr($nextarg, strlen($opt));
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$myoptind --;
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$skipopts = 0;
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}
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}
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}
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}
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if($opt === NULL)
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{
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if(substr($nextarg, 0, strlen('--')) == '--')
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{
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$longopt = substr($nextarg, strlen('--'));
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if(strpos($longopt, '=') !== false)
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{
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$longopt = substr($longopt, 0, strpos($longopt, '='));
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}
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throw new MygetoptException("option \"--$longopt\" is not recognized");
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}
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$shortopt = substr($nextarg, strlen('-'), 1);
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throw new MygetoptException("option \"-$shortopt\" is not recognized");
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}
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$ret = array($opt, $arg);
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}
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if ($skipopts > 0)
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{
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for($i = 0; $i < $argc; $i ++)
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{
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if(($i < $skipopt) || ($i >= ($skipopt + $skipopts)))
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{
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$new_argv[] = $argv[$i];
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}
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}
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if($myoptind >= $skipopt)
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{
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$myoptind -= $skipopts;
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}
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$argv = $new_argv;
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$argc = count($argv);
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}
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}
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return $ret;
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}
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function usage($argc, $argv)
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{
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fprintf(STDERR, "Usage: %s [OPTIONS]... <IMAGE>\n", $argv[0]);
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fprintf(STDERR, "Convert IMAGE to any text based available format.\n");
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fprintf(STDERR, "Example : %s -W 80 -f ansi ./caca.png\n\n", $argv[0]);
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fprintf(STDERR, "Options:\n");
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fprintf(STDERR, " -h, --help\t\t\tThis help\n");
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fprintf(STDERR, " -v, --version\t\t\tVersion of the program\n");
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fprintf(STDERR, " -W, --width=WIDTH\t\tWidth of resulting image\n");
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fprintf(STDERR, " -H, --height=HEIGHT\t\tHeight of resulting image\n");
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fprintf(STDERR, " -x, --font-width=WIDTH\t\tWidth of output font\n");
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fprintf(STDERR, " -y, --font-height=HEIGHT\t\tHeight of output font\n");
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fprintf(STDERR, " -b, --brightness=BRIGHTNESS\tBrightness of resulting image\n");
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fprintf(STDERR, " -c, --contrast=CONTRAST\tContrast of resulting image\n");
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fprintf(STDERR, " -g, --gamma=GAMMA\t\tGamma of resulting image\n");
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fprintf(STDERR, " -d, --dither=DITHER\t\tDithering algorithm to use :\n");
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$list = caca_get_dither_algorithm_list(caca_create_dither(imagecreate(1, 1)));
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foreach($list as $type => $name)
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{
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fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
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}
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fprintf(STDERR, " -f, --format=FORMAT\t\tFormat of the resulting image :\n");
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$list = caca_get_export_list();
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foreach($list as $type => $name)
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{
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fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
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}
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}
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function version()
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{
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printf(
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"img2txt Copyright 2006-2007 Sam Hocevar and Jean-Yves Lamoureux\n" .
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" Copyright 2008 Benjamin C. Wiley Sittler\n" .
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"Internet: <sam@hocevar.net> <jylam@lnxscene.org>\n" .
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" <bsittler@gmail.com> Version: %s\n" .
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"\n" .
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"img2txt, along with its documentation, may be freely copied and distributed.\n" .
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"\n" .
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"The latest version of img2txt is available from the web site,\n" .
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" http://caca.zoy.org/wiki/libcaca in the libcaca package.\n" .
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"\n",
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caca_get_version());
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}
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function main()
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{
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global $argc, $argv;
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$cols = 0;
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$lines = 0;
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$font_width = 6;
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$font_height = 10;
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$format = NULL;
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$dither = NULL;
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$gamma = $brightness = $contrast = -1.0;
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$long_options = array(
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"width:" => 'W',
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"height:" => 'H',
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"font-width:" => 'x',
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"font-height:" => 'y',
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"format:" => 'f',
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"dither:" => 'd',
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"gamma:" => 'g',
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"brightness:" => 'b',
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"contrast:" => 'c',
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"help" => 'h',
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"version" => 'v'
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);
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try {
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while($opt_and_arg = mygetopt("W:H:f:d:g:b:c:hvx:y:", array_keys($long_options)))
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{
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$opt = $opt_and_arg[0];
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$arg = $opt_and_arg[1];
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if((substr($opt, 0, 2) == '--')
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&&
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array_key_exists(substr($opt, strlen('--')) . (($arg !== NULL) ? ':' : ''), $long_options))
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{
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$opt = '-' . $long_options[substr($opt, strlen('--')) . (($arg !== NULL) ? ':' : '')];
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}
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switch($opt)
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{
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case '-W': /* --width */
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$cols = intval($arg);
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break;
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case '-H': /* --height */
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$lines = intval($arg);
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break;
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case '-x': /* --width */
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$font_width = intval($arg);
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break;
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case '-y': /* --height */
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$font_height = intval($arg);
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break;
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case '-f': /* --format */
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$format = $arg;
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break;
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case '-d': /* --dither */
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$dither = $arg;
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break;
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case '-g': /* --gamma */
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$gamma = floatval($arg);
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break;
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case '-b': /* --brightness */
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$brightness = floatval($arg);
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break;
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case '-c': /* --contrast */
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$contrast = floatval($arg);
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break;
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case '-h': /* --help */
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usage($argc, $argv);
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return 0;
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case '-v': /* --version */
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version();
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return 0;
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default:
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return 1;
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}
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}
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}
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catch (MygetoptException $e)
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{
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fprintf(STDERR, "%s", $argv[0] . ": " . $e->getMessage() . "\n");
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usage($argc, $argv);
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return 2;
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}
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if($argc != 2)
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{
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fprintf(STDERR, "%s: wrong argument count\n", $argv[0]);
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usage($argc, $argv);
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return 1;
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}
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$cv = caca_create_canvas(0, 0);
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if(!$cv)
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{
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fprintf(STDERR, "%s: unable to initialise libcaca\n", $argv[0]);
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return 1;
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}
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$i_str = file_get_contents($argv[$argc-1]);
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$i = $i_str ? imagecreatefromstring($i_str) : NULL;
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if(!$i)
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{
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fprintf(STDERR, "%s: unable to load %s\n", $argv[0], $argv[$argc-1]);
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return 1;
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}
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/* Assume a 6×10 font */
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if(!$cols && !$lines)
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{
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$cols = 60;
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$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
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}
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else if($cols && !$lines)
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{
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$lines = $cols * imagesy($i) * $font_width / imagesx($i) / $font_height;
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}
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else if(!$cols && $lines)
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{
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$cols = $lines * imagesx($i) * $font_height / imagesy($i) / $font_width;
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}
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caca_set_canvas_size($cv, $cols, $lines);
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caca_set_color_ansi($cv, CACA_DEFAULT, CACA_TRANSPARENT);
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caca_clear_canvas($cv);
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$i_dither = caca_create_dither($i);
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if(! caca_set_dither_algorithm($i_dither, $dither?$dither:"fstein"))
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{
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fprintf(STDERR, "%s: Can't dither image with algorithm '%s'\n", $argv[0], $dither?$dither:"fstein");
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return -1;
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}
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if($brightness!=-1) caca_set_dither_brightness ($i_dither, $brightness);
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if($contrast!=-1) caca_set_dither_contrast ($i_dither, $contrast);
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if($gamma!=-1) caca_set_dither_gamma ($i_dither, $gamma);
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caca_dither_bitmap($cv, 0, 0, $cols, $lines, $i_dither, $i);
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$export = caca_export_string($cv, $format?$format:"ansi");
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if(!$export)
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{
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fprintf(STDERR, "%s: Can't export to format '%s'\n", $argv[0], $format?$format:"ansi");
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return -1;
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}
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else
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{
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echo $export;
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}
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return 0;
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}
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exit(main());
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?>
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