* License: GPLv2
* Description: Allows the admin to set min / max image dimentions
*/
class ResolutionLimit implements Extension {
public function receive_event(Event $event) {
if($event instanceof ImageAdditionEvent) {
global $config;
$min_w = $config->get_int("upload_min_width", -1);
$min_h = $config->get_int("upload_min_height", -1);
$max_w = $config->get_int("upload_max_width", -1);
$max_h = $config->get_int("upload_max_height", -1);
$ratios = explode(" ", $config->get_string("upload_ratios", ""));
$image = $event->image;
if($min_w > 0 && $image->width < $min_w) throw new UploadException("Image too small");
if($min_h > 0 && $image->height < $min_h) throw new UploadException("Image too small");
if($max_w > 0 && $image->width > $max_w) throw new UploadException("Image too large");
if($max_h > 0 && $image->height > $max_h) throw new UploadException("Image too large");
if(count($ratios) > 0) {
$ok = false;
$valids = 0;
foreach($ratios as $ratio) {
$parts = explode(":", $ratio);
if(count($parts) < 2) continue;
$valids++;
$width = $parts[0];
$height = $parts[1];
if($image->width / $width == $image->height / $height) {
$ok = true;
break;
}
}
if($valids > 0 && !$ok) {
throw new UploadException(
"Image needs to be in one of these ratios: ".
html_escape($config->get_string("upload_ratios", "")));
}
}
}
if($event instanceof SetupBuildingEvent) {
$sb = new SetupBlock("Resolution Limits");
$sb->add_label("Min ");
$sb->add_int_option("upload_min_width");
$sb->add_label(" x ");
$sb->add_int_option("upload_min_height");
$sb->add_label(" px");
$sb->add_label("
Max ");
$sb->add_int_option("upload_max_width");
$sb->add_label(" x ");
$sb->add_int_option("upload_max_height");
$sb->add_label(" px");
$sb->add_label("
(-1 for no limit)");
$sb->add_label("
Ratios ");
$sb->add_text_option("upload_ratios");
$sb->add_label("
(eg. '4:3 16:9', blank for no limit)");
$event->panel->add_block($sb);
}
}
}
add_event_listener(new ResolutionLimit(), 40); // early, to veto UIE
?>