<?php
/**************************************************************************
* *
* 4images - A Web Based Image Gallery Management System *
* ---------------------------------------------------------------- *
* *
* File: image_utils.php *
* Copyright: © 2002 Jan Sorgalla *
* Email: jan@4homepages.de *
* Web: http://www.4homepages.de *
* Scriptversion: 1.7.6 *
* *
* Never released without support from: Nicky (http://www.nicky.net) *
* *
**************************************************************************
* *
* Dieses Script ist KEINE Freeware. Bitte lesen Sie die Lizenz- *
* bedingungen (Lizenz.txt) f?r weitere Informationen. *
* --------------------------------------------------------------- *
* This script is NOT freeware! Please read the Copyright Notice *
* (Licence.txt) for further information. *
* *
*************************************************************************/
if (!defined('ROOT_PATH')) {
die("Security violation");
}

function init_convert_options() {
global $config, $lang;

$convert_options = array(
"convert_error" => 0,
"convert_tool" => $config['convert_tool'],
"convert_path" => ereg_replace("\/$", "", $config['convert_tool_path'])
);
switch($config['convert_tool']) {
case "im":
$exec = check_executable("convert");
$convert_options['convert_path'] = preg_replace("/\/?(".check_executable("mogrify")."|$exec)+$/i", '', $convert_options['convert_path']);
$convert_options['convert_path'] = $convert_options['convert_path'] . '/' . $exec;
if (!@is_executable($convert_options['convert_path'])) {
$convert_options['convert_error'] = "<b class=\"marktext\">".$lang['im_error']."</b><br />\n".$lang['check_module_settings'];
}
break;
case "gd":
$convert_options['convert_gd2'] = false;

if (defined('CONVERT_IS_GD2')) {
$convert_options['convert_gd2'] = CONVERT_IS_GD2 == 0 ? false : true;
} elseif (function_exists("imagecreatetruecolor") && function_exists("imagecopyresampled")) {
$convert_options['convert_gd2'] = true;
}

if (!function_exists("imagetypes")) {
$convert_options['convert_error'] = (defined("IN_CP")) ? "<b class=\"marktext\">".$lang['gd_error']."</b><br />\n".$lang['check_module_settings'] : 1;
}
break;
case "netpbm":
if (!@is_executable($convert_options['convert_path']."/".check_executable("pnmscale"))) {
$convert_options['convert_error'] = (defined("IN_CP")) ? "<b class=\"marktext\">".$lang['netpbm_error']."</b><br />\n".$lang['check_module_settings'] : 1;
}
break;
default:
$convert_options['convert_error'] = (defined("IN_CP")) ? "<b class=\"marktext\">".$lang['no_convert_module']."</b><br />\n".$lang['check_module_settings'] : 1;
}
return $convert_options;
}

function resize_image_gd($src, $dest, $quality, $width, $height, $image_info) {
global $convert_options;

$types = array(1 => "gif", 2 => "jpeg", 3 => "png");
if ($convert_options['convert_gd2']) {
$thumb = imagecreatetruecolor($width, $height);
}
else {
$thumb = imagecreate($width, $height);
}
$image_create_handle = "imagecreatefrom".$types[$image_info[2]];
if ($image = $image_create_handle($src)) {
if ($convert_options['convert_gd2']) {
imagecopyresampled($thumb, $image, 0, 0, 0, 0, $width, $height, ImageSX($image), ImageSY($image));
}
else {
imagecopyresized($thumb, $image, 0, 0, 0, 0, $width, $height, ImageSX($image), ImageSY($image));
}

if ($image_info[2] == 3) {
$quality = 9;
}

$image_handle = "image".$types[$image_info[2]];
$image_handle($thumb, $dest, $quality);
imagedestroy($image);
imagedestroy($thumb);
}
return (file_exists($dest)) ? 1 : 0;
}

function resize_image_im($src, $dest, $quality, $width, $height, $image_info) {
global $convert_options;

$command = $convert_options['convert_path']." -quality ".$quality." -antialias -sample $width"."x"."$height \"$src\" \"$dest\"";
system($command);
return (file_exists($dest)) ? 1 : 0;
}

function resize_image_netpbm($src, $dest, $quality, $width, $height, $image_info) {
global $convert_options;

$convert_path = $convert_options['convert_path'];
$types = array(1 => "gif", 2 => "jpeg", 3 => "png");
$target = ($width > $height) ? $width : $height;
$command = $convert_path."/".check_executable($types[$image_info[2]]."topnm")." ".$src." | ".$convert_path."/".check_executable("pnmscale")." --quiet -xysize ".$target." ".$target." | ";
if ($image_info[2] == 1) {
$command .= $convert_path."/".check_executable("ppmquant")." 256 | " . $convert_path."/".check_executable("ppmtogif")." > ".$dest;
}
elseif ($image_info[2] == 3) {
$command .= $convert_path."/".check_executable("pnmtopng")." > ".$dest;
}
else {
$jpeg_exec = (file_exists($convert_path."/".check_executable("pnmtojpeg"))) ? check_executable("pnmtojpeg") : check_executable("ppmtojpeg");
$command .= $convert_path."/".$jpeg_exec." --quality=".$quality." > ".$dest;
}
system($command);
return (file_exists($dest)) ? 1 : 0;
}

function get_width_height($dimension, $width, $height, $resize_type = 1) {
if ($resize_type == 2) {
$new_width = $dimension;
$new_height = floor(($dimension/$width) * $height);
}
elseif ($resize_type == 3) {
$new_width = floor(($dimension/$height) * $width);
$new_height = $dimension;
}
else {
$ratio = $width / $height;
if ($ratio > 1) {
$new_width = $dimension;
$new_height = floor(($dimension/$width) * $height);
}
else {
$new_width = floor(($dimension/$height) * $width);
$new_height = $dimension;
}
}
return array("width" => $new_width, "height" => $new_height);
}

function create_thumbnail($src, $dest, $quality, $dimension, $resize_type) {
global $convert_options;

if (file_exists($dest)) {
@unlink($dest);
}
$image_info = (defined("IN_CP")) ? getimagesize($src) : @getimagesize($src);
if (!$image_info) {
return false;
}
$width_height = get_width_height($dimension, $image_info[0], $image_info[1], $resize_type);
$resize_handle = "resize_image_".$convert_options['convert_tool'];
if ($resize_handle($src, $dest, $quality, $width_height['width'], $width_height['height'], $image_info)) {
@chmod($dest, CHMOD_FILES);
return true;
}
else {
return false;
}
}

function resize_image($file, $quality, $dimension, $resize_type = 1) {
global $convert_options;
$image_info = (defined("IN_CP")) ? getimagesize($file) : @getimagesize($file);
if (!$image_info) {
return false;
}
$file_bak = $file.".bak";
if (!rename($file, $file_bak)) {
return false;
}
$width_height = get_width_height($dimension, $image_info[0], $image_info[1], $resize_type);
$resize_handle = "resize_image_".$convert_options['convert_tool'];
if ($resize_handle($file_bak, $file, $quality, $width_height['width'], $width_height['height'], $image_info)) {
@chmod($file, CHMOD_FILES);
@unlink($file_bak);
return true;
}
else {
rename($file_bak, $file);
return false;
}
}
?>