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223 lines
7.3 KiB
PHP
223 lines
7.3 KiB
PHP
<?php
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/*
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+ ----------------------------------------------------------------------------+
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| e107 website system
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| ©Steve Dunstan 2001-2002
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| http://e107.org
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| jalist@e107.org
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| Released under the terms and conditions of the
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| GNU General Public License (http://gnu.org).
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| $Source: /cvs_backup/e107_0.8/e107_handlers/resize_handler.php,v $
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| $Revision: 1.8 $
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| $Date: 2008-01-12 16:51:43 $
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| $Author: e107steved $
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| Mod to give correct return code if source image already smaller than max size
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+----------------------------------------------------------------------------+
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*/
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if (!defined('e107_INIT')) { exit; }
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function resize_image($source_file, $destination_file, $type = "upload", $model = "")
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{
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// $destination_file - 'stdout' sends direct to browser. Otherwise treated as file name
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// - if its a file, given '644' permissions
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// $type - "upload"
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// - numeric - sets new width of image
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// - anything else - default preference for image width used, or failing that, 120 pixels
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// 'avatar' is used
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// $model - if "copy", creates a new file from $destination_file with the prefix 'thumb_'.
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// Otherwise overwrites any existing $destination_file
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// Returns: TRUE - essentially, if $destination_file (or a file with a modified name) is valid:
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// - if resizing done
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// - source and (ultimate) destination files are the same, and the image was smaller than the limits
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// - destination was 'stdout', and file output successfully
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// FALSE - essentially, if there is not a valid output file available - usually, that resizing failed, or some other error.
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global $pref;
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$new_height = 0;
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$mode = ($pref['resize_method'] ? $pref['resize_method'] : "gd2");
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if ($type == "upload")
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{
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$new_size = varset($pref['im_width'],400);
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}
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elseif(is_numeric($type))
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{
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$new_size = $type;
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}
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else
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{ // Use preferences or failing that hard-coded defaults for new size
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$new_size = varset($pref['im_width'], 120);
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$new_height = varset($pref['im_height'], 100);
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}
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// $im_quality = varset($pref['im_quality'], 99);
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$im_quality = 99;
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$image_stats = getimagesize($source_file);
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if ($image_stats == null)
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{
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// echo "<b>DEBUG</b> image_stats are null<br />";
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return false;
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}
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if (($image_stats[0] == 0) || ($image_stats[1] == 0))
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{
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return FALSE; // Zero sized image - shouldn't happen
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}
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// Check the image type. '1'=GIF, '2'=jpeg, '3' = PNG
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if ($image_stats[2] != 1 && $image_stats[2] != 2 && $image_stats[2] != 3 && ($mode == 'gd1' || $mode == 'gd2'))
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{
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echo "<b>DEBUG</b> Wrong image type<br />";
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return FALSE;
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}
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$imagewidth = $image_stats[0]; // Width of existing image
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$imageheight = $image_stats[1]; // Height of existing image
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if ($imagewidth <= $new_size && ($imageheight <= $new_height || $new_height == 0))
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{ // Nothing to do if image width already smaller than the maximum
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// If we were basically ensuring an existing file was within limits, return TRUE
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// If we had to create a new file, return FALSE since it wasn't done.
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return (($source_file == $destination_file) && ($model != 'copy'));
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}
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$ratio = ($imagewidth / $new_size);
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$new_imageheight = round($imageheight / $ratio);
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if (($new_height <= $new_imageheight) && $new_height > 0)
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{
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$ratio = $new_imageheight / $new_height;
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$new_imageheight = $new_height;
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$new_size = round($new_size / $ratio);
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}
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switch ($mode)
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{
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case "ImageMagick" :
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if ($destination_file == "stdout")
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{ /* if destination is stdout, output directly to the browser */
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// $destination_file = "jpg:-";
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header("Content-type: image/jpeg");
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// Use double quotes instead of single to keep Bill happy
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passthru ($pref['im_path']."convert -quality ".$im_quality." -antialias -geometry ".$new_size."x".$new_imageheight." ".escapeshellarg($source_file)." \"jpg:-\"");
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}
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else
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{ /* otherwise output to file */
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if ($model == "copy")
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{
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$name = substr($destination_file, (strrpos($destination_file, "/")+1));
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$name2 = "thumb_".$name;
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$destination_file = str_replace($name, $name2, $destination_file);
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}
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// Use double quotes instead of single to keep Bill happy
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// exec ($pref['im_path']."convert -quality ".$im_quality." -antialias -geometry ".$new_size."x".$new_imageheight." ".escapeshellarg($source_file)." '".$destination_file."'");
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exec ($pref['im_path']."convert -quality ".$im_quality." -antialias -geometry ".$new_size."x".$new_imageheight." ".escapeshellarg($source_file)." \"".$destination_file."\"");
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}
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break;
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case "gd1" :
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switch ($image_stats[2])
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{
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case IMAGETYPE_PNG : // 3 - PNG
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$src_img = @imagecreatefrompng($source_file);
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break;
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case IMAGETYPE_GIF : // 1 - GIF
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if (!function_exists('imagecreatefromgif')) return FALSE; // Some versions of GD library don't support GIF
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$src_img = @imagecreatefromgif($source_file);
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break;
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case IMAGETYPE_JPEG : // 2 - Jpeg
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$src_img = @imagecreatefromjpeg($source_file);
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break;
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default :
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return FALSE; // Unsupported image type
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}
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if (!$src_img)
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{
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return FALSE;
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}
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$dst_img = imagecreate($new_size, $new_imageheight); // Create blank image of correct size as target
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// Only next line is different between gd1 and gd2
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imagecopyresized($dst_img, $src_img, 0, 0, 0, 0, $new_size, $new_imageheight, $imagewidth, $imageheight);
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if ($model == "copy")
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{
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$name = substr($destination_file, (strrpos($destination_file, "/")+1));
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$name2 = "thumb_".$name;
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$destination_file = str_replace($name, $name2, $destination_file);
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}
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if ($destination_file == "stdout")
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{
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header("Content-type: image/jpeg");
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imagejpeg($dst_img, '', $im_quality);
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}
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else
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{
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imagejpeg($dst_img, $destination_file, $im_quality);
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imagedestroy($src_img);
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imagedestroy($dst_img);
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}
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break;
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case "gd2" :
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switch ($image_stats[2])
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{
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case IMAGETYPE_PNG : // 3 - PNG
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$src_img = @imagecreatefrompng($source_file);
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break;
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case IMAGETYPE_GIF : // 1 - GIF
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if (!function_exists('imagecreatefromgif')) return FALSE; // Some versions of GD library don't support GIF
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$src_img = @imagecreatefromgif($source_file);
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break;
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case IMAGETYPE_JPEG : // 2 - Jpeg
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$src_img = @imagecreatefromjpeg($source_file);
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break;
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default :
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return FALSE; // Unsupported image type
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}
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if (!$src_img)
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{
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return FALSE;
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}
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$dst_img = imagecreatetruecolor($new_size, $new_imageheight);
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// Only next line is different between gd1 and gd2
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imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $new_size, $new_imageheight, $imagewidth, $imageheight);
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if ($model == "copy")
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{
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$name = substr($destination_file, (strrpos($destination_file, "/")+1));
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$name2 = "thumb_".$name;
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$destination_file = str_replace($name, $name2, $destination_file);
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}
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if ($destination_file == "stdout")
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{
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header("Content-type: image/jpeg");
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imagejpeg($dst_img, '', $im_quality);
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}
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else
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{
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imagejpeg($dst_img, $destination_file, $im_quality);
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imagedestroy($src_img);
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imagedestroy($dst_img);
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}
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break;
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} // End switch($mode)
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if ($destination_file == "stdout") return TRUE; // Can't do anything more if file sent to stdout - assume success
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@chmod($destination_file, 0644);
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$image_stats = getimagesize($destination_file);
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if ($image_stats == null)
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{
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return FALSE;
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}
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else
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{
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return TRUE;
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}
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}
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?>
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