148 lines
3.9 KiB
PHP
148 lines
3.9 KiB
PHP
<?php
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class RegenThumb extends Extension {
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// event handler {{{
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public function receive_event($event) {
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if(is_a($event, 'PageRequestEvent') && ($event->page == "regen_thumb")) {
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global $user;
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if($user->is_admin() && isset($_POST['program']) && isset($_POST['image_id'])) {
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$this->make_thumb($_POST['program'], $_POST['image_id']);
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}
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}
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if(is_a($event, 'DisplayingImageEvent')) {
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global $page;
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global $user;
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if($user->is_admin()) {
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$page->add_side_block(new Block("Regen Thumb", $this->build_regen_buttons($event->image)));
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}
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}
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}
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// }}}
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// do things {{{
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// FIXME: make locations of convert / epeg config variables
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private function make_thumb($program, $image_id) {
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global $database;
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global $config;
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$i_image_id = int_escape($image_id);
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$image = $database->get_image($i_image_id);
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$f_image = $this->check_filename($image->get_image_filename());
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$f_thumb = $this->check_filename($image->get_thumb_filename());
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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 = $config->get_int('thumb_quality');
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switch($program) {
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case 'convert':
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unlink($f_thumb);
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exec("convert $f_image -geometry {$w}x{$h} -quality {$q} $f_thumb");
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break;
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case 'gd':
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$this->make_thumb_gd($f_image, $f_thumb);
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break;
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default:
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break;
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}
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global $page;
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$page->set_title("Thumbnail Regenerated");
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$page->set_heading("Thumbnail Regenerated");
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$page->add_side_block(new NavBlock());
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$page->add_main_block(new Block("Thumbnail", $this->build_thumb_html($image)));
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}
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private function build_thumb_html($image) {
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$link = make_link("post/view/".$image->id);
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$img = $image->get_thumb_link();
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$html = "<a href='$link'><img src='$img'></a>";
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return $html;
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}
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private function check_filename($filename) {
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$filename = preg_replace("#[^a-zA-Z0-9/\._]#", "", $filename);
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return $filename;
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}
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// }}}
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// GD thumber {{{
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private function read_file($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 $data;
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}
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private function make_thumb_gd($inname, $outname) {
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global $config;
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$thumb = $this->get_thumb($inname);
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return imagejpeg($thumb, $outname, $config->get_int('thumb_quality'));
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}
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private function get_thumb($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 = $info[1];
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$max_width = $config->get_int('thumb_width');
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$max_height = $config->get_int('thumb_height');
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$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 > $memory_limit) {
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$thumb = imagecreatetruecolor($max_width, min($max_height, 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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$xscale = ($max_height / $height);
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$yscale = ($max_width / $width);
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$scale = ($xscale < $yscale) ? $xscale : $yscale;
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if($scale >= 1) {
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$thumb = $image;
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}
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else {
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$thumb = imagecreatetruecolor($width*$scale, $height*$scale);
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imagecopyresampled(
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$thumb, $image, 0, 0, 0, 0,
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$width*$scale, $height*$scale, $width, $height
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);
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}
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return $thumb;
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}
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}
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// }}}
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// page building {{{
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private function build_regen_buttons($image) {
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global $user;
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if($user->is_admin()) {
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return "
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<form action='".make_link("regen_thumb")."' method='POST'>
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<input type='hidden' name='image_id' value='{$image->id}'>
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<select name='program'>
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<option value='convert'>ImageMagick</option>
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<option value='gd'>GD</option>
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<!-- <option value='epeg'>EPEG (for JPEG only)</option> -->
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</select>
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<input type='submit' value='Regenerate'>
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</form>
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";
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}
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}
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// }}}
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}
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add_event_listener(new RegenThumb());
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?>
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