98 lines
2.9 KiB
PHP
98 lines
2.9 KiB
PHP
<?php
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/*
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* Name: Handle ICO
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* Author: Shish <webmaster@shishnet.org>
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* Description: Handle windows icons
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*/
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class IcoFileHandler extends Extension {
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public function onDataUpload(DataUploadEvent $event) {
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if($this->supported_ext($event->type) && $this->check_contents($event->tmpname)) {
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$hash = $event->hash;
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$ha = substr($hash, 0, 2);
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move_upload_to_archive($event);
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send_event(new ThumbnailGenerationEvent($event->hash, $event->type));
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$image = $this->create_image_from_data("images/$ha/$hash", $event->metadata);
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if(is_null($image)) {
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throw new UploadException("Icon handler failed to create image object from data");
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}
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$iae = new ImageAdditionEvent($image);
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send_event($iae);
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$event->image_id = $iae->image->id;
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}
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}
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public function onThumbnailGeneration(ThumbnailGenerationEvent $event) {
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if($this->supported_ext($event->type)) {
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$this->create_thumb($event->hash);
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}
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}
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public function onDisplayingImage(DisplayingImageEvent $event) {
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global $page;
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if($this->supported_ext($event->image->ext)) {
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$this->theme->display_image($page, $event->image);
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}
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}
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private function supported_ext(string $ext): bool {
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$exts = array("ico", "ani", "cur");
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return in_array(strtolower($ext), $exts);
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}
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private function create_image_from_data(string $filename, array $metadata) {
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$image = new Image();
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$fp = fopen($filename, "r");
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$header = unpack("Snull/Stype/Scount", fread($fp, 6));
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$subheader = unpack("Cwidth/Cheight/Ccolours/Cnull/Splanes/Sbpp/Lsize/loffset", fread($fp, 16));
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fclose($fp);
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$width = $subheader['width'];
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$height = $subheader['height'];
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$image->width = $width == 0 ? 256 : $width;
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$image->height = $height == 0 ? 256 : $height;
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$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 = is_array($metadata['tags']) ? $metadata['tags'] : Tag::explode($metadata['tags']);
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$image->source = $metadata['source'];
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return $image;
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}
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private function check_contents(string $file): bool {
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if(!file_exists($file)) return false;
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$fp = fopen($file, "r");
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$header = unpack("Snull/Stype/Scount", fread($fp, 6));
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fclose($fp);
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return ($header['null'] == 0 && ($header['type'] == 0 || $header['type'] == 1));
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}
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private function create_thumb(string $hash): bool {
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global $config;
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$inname = warehouse_path("images", $hash);
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$outname = warehouse_path("thumbs", $hash);
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$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 = $config->get_int("thumb_mem_limit") / 1024 / 1024; // IM takes memory in MB
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if($config->get_bool("ico_convert")) {
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// "-limit memory $mem" broken?
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exec("convert {$inname}[0] -geometry {$w}x{$h} -quality {$q} jpg:$outname");
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}
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else {
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copy($inname, $outname);
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}
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return true;
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}
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}
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