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copy img2txt.php to www in preparation for htmlizing

tags/v0.99.beta17
Ben Wiley Sittler bsittler 16 years ago
parent
fc3775ca2a
commit
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1 changed files with 383 additions and 0 deletions
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      caca-php/examples/www/img2txt.php

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#!/usr/bin/php5
<?php
/*
* img2txt image to text converter
* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
* 2007 Jean-Yves Lamoureux <jylam@lnxscene.org>
* All Rights Reserved
*
* $Id$
*
* 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://sam.zoy.org/wtfpl/COPYING for more details.
*/

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

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)
{
fprintf(STDERR, "Usage: %s [OPTIONS]... <IMAGE>\n", $argv[0]);
fprintf(STDERR, "Convert IMAGE to any text based available format.\n");
fprintf(STDERR, "Example : %s -w 80 -f ansi ./caca.png\n\n", $argv[0]);
fprintf(STDERR, "Options:\n");
fprintf(STDERR, " -h, --help\t\t\tThis help\n");
fprintf(STDERR, " -v, --version\t\t\tVersion of the program\n");
fprintf(STDERR, " -W, --width=WIDTH\t\tWidth of resulting image\n");
fprintf(STDERR, " -H, --height=HEIGHT\t\tHeight of resulting image\n");
fprintf(STDERR, " -x, --font-width=WIDTH\t\tWidth of output font\n");
fprintf(STDERR, " -y, --font-height=HEIGHT\t\tHeight of output font\n");
fprintf(STDERR, " -b, --brightness=BRIGHTNESS\tBrightness of resulting image\n");
fprintf(STDERR, " -c, --contrast=CONTRAST\tContrast of resulting image\n");
fprintf(STDERR, " -g, --gamma=GAMMA\t\tGamma of resulting image\n");
fprintf(STDERR, " -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)
{
fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
}

fprintf(STDERR, " -f, --format=FORMAT\t\tFormat of the resulting image :\n");
$list = caca_get_export_list();
foreach($list as $type => $name)
{
fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
}
}

function version()
{
printf(
"img2txt Copyright 2006-2007 Sam Hocevar and Jean-Yves Lamoureux\n" .
"Internet: <sam@zoy.org> <jylam@lnxscene.org> 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 $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'
);

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;
}
}

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);
}
else
{
echo $export;
}

return 0;
}
exit(main());
?>

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