145 lines
3.7 KiB
PHP
145 lines
3.7 KiB
PHP
<?php
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/**
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* Name: Pixel File Handler
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* Author: Shish <webmaster@shishnet.org>
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* Description: Handle JPG, PNG, GIF, etc files
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*/
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class PixelFileHandler extends DataHandlerExtension {
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protected function supported_ext($ext) {
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$exts = array("jpg", "jpeg", "gif", "png");
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return in_array(strtolower($ext), $exts);
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}
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protected function create_image_from_data($filename, $metadata) {
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global $config;
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$image = new Image();
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$info = "";
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if(!($info = getimagesize($filename))) return null;
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$image->width = $info[0];
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$image->height = $info[1];
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$image->filesize = $metadata['size'];
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$image->hash = $metadata['hash'];
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$image->filename = $metadata['filename'];
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$image->ext = $metadata['extension'];
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$image->tag_array = Tag::explode($metadata['tags']);
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$image->source = $metadata['source'];
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return $image;
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}
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protected function check_contents($file) {
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$valid = Array(IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_JPEG);
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if(!file_exists($file)) return false;
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$info = getimagesize($file);
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if(is_null($info)) return false;
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if(in_array($info[2], $valid)) return true;
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return false;
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}
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protected function create_thumb($hash) {
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$ha = substr($hash, 0, 2);
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$inname = "images/$ha/$hash";
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$outname = "thumbs/$ha/$hash";
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global $config;
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$ok = false;
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switch($config->get_string("thumb_engine")) {
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default:
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case 'gd':
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$ok = $this->make_thumb_gd($inname, $outname);
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break;
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case 'convert':
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$ok = $this->make_thumb_convert($inname, $outname);
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break;
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}
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return $ok;
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}
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// IM thumber {{{
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private function make_thumb_convert($inname, $outname) {
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global $config;
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$w = $config->get_int("thumb_width");
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$h = $config->get_int("thumb_height");
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$q = $config->get_int("thumb_quality");
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$mem = $config->get_int("thumb_max_memory") / 1024 / 1024; // IM takes memory in MB
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// convert to bitmap & back to strip metadata -- otherwise we
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// can end up with 3KB of jpg data and 200KB of misc extra...
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// "-limit memory $mem" broken?
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exec("convert {$inname}[0] -geometry {$w}x{$h} bmp:- | convert bmp:- -quality {$q} jpg:$outname");
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return true;
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}
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// }}}
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// epeg thumber {{{
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private function make_thumb_epeg($inname, $outname) {
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global $config;
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$w = $config->get_int("thumb_width");
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exec("epeg $inname -c 'Created by EPEG' --max $w $outname");
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return true;
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}
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// }}}
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// GD thumber {{{
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private function make_thumb_gd($inname, $outname) {
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global $config;
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$thumb = $this->get_thumb($inname);
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$ok = imagejpeg($thumb, $outname, $config->get_int('thumb_quality'));
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imagedestroy($thumb);
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return $ok;
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}
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private function get_thumb($tmpname) {
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global $config;
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$info = getimagesize($tmpname);
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$width = $info[0];
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$height = $info[1];
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$memory_use = (filesize($tmpname)*2) + ($width*$height*4) + (4*1024*1024);
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$memory_limit = get_memory_limit();
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if($memory_use > $memory_limit) {
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$w = $config->get_int('thumb_width');
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$h = $config->get_int('thumb_height');
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$thumb = imagecreatetruecolor($w, min($h, 64));
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$white = imagecolorallocate($thumb, 255, 255, 255);
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$black = imagecolorallocate($thumb, 0, 0, 0);
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imagefill($thumb, 0, 0, $white);
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imagestring($thumb, 5, 10, 24, "Image Too Large :(", $black);
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return $thumb;
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}
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else {
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$image = imagecreatefromstring($this->read_file($tmpname));
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$tsize = get_thumbnail_size($width, $height);
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$thumb = imagecreatetruecolor($tsize[0], $tsize[1]);
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imagecopyresampled(
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$thumb, $image, 0, 0, 0, 0,
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$tsize[0], $tsize[1], $width, $height
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);
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return $thumb;
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}
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}
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private function read_file($fname) {
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$fp = fopen($fname, "r");
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if(!$fp) return false;
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$data = fread($fp, filesize($fname));
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fclose($fp);
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return $data;
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}
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// }}}
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}
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add_event_listener(new PixelFileHandler());
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?>
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