set_default_bool(ResizeConfig::ENABLED, true);
$config->set_default_bool(ResizeConfig::GET_ENABLED, false);
$config->set_default_bool(ResizeConfig::UPLOAD, false);
$config->set_default_string(ResizeConfig::ENGINE, MediaEngine::GD);
$config->set_default_int(ResizeConfig::DEFAULT_WIDTH, 0);
$config->set_default_int(ResizeConfig::DEFAULT_HEIGHT, 0);
}
public function onImageAdminBlockBuilding(ImageAdminBlockBuildingEvent $event): void
{
global $user, $config;
if (
$user->can(Permissions::EDIT_FILES) &&
$config->get_bool(ResizeConfig::ENABLED) &&
$this->can_resize_mime($event->image->get_mime())
) {
/* Add a link to resize the image */
global $config;
$default_width = $config->get_int(ResizeConfig::DEFAULT_WIDTH, $event->image->width);
$default_height = $config->get_int(ResizeConfig::DEFAULT_HEIGHT, $event->image->height);
$event->add_part(SHM_SIMPLE_FORM(
"resize/{$event->image->id}",
rawHTML("
x
")
));
}
}
public function onSetupBuilding(SetupBuildingEvent $event): void
{
$sb = $event->panel->create_new_block("Image Resize");
$sb->start_table();
$sb->add_choice_option(ResizeConfig::ENGINE, MediaEngine::IMAGE_ENGINES, "Engine", true);
$sb->add_bool_option(ResizeConfig::ENABLED, "Allow resizing images", true);
$sb->add_bool_option(ResizeConfig::GET_ENABLED, "Allow GET args", true);
$sb->add_bool_option(ResizeConfig::UPLOAD, "Resize on upload", true);
$sb->end_table();
$sb->start_table();
$sb->add_table_header("Preset/Default Dimensions");
$sb->add_label("| Width | ");
$sb->add_int_option(ResizeConfig::DEFAULT_WIDTH);
$sb->add_label(" | px |
|---|
");
$sb->add_label("| Height | ");
$sb->add_int_option(ResizeConfig::DEFAULT_HEIGHT);
$sb->add_label(" | px |
|---|
");
$sb->add_label(" | (enter 0 for no default) |
");
$sb->end_table();
}
public function onDataUpload(DataUploadEvent $event): void
{
global $config, $page;
if ($config->get_bool(ResizeConfig::UPLOAD) == true
&& $this->can_resize_mime($event->mime)) {
$image_obj = $event->images[0];
$width = $height = 0;
if ($config->get_int(ResizeConfig::DEFAULT_WIDTH) !== 0) {
$height = $config->get_int(ResizeConfig::DEFAULT_WIDTH);
}
if ($config->get_int(ResizeConfig::DEFAULT_HEIGHT) !== 0) {
$height = $config->get_int(ResizeConfig::DEFAULT_HEIGHT);
}
$isanigif = 0;
if ($image_obj->get_mime() == MimeType::GIF) {
$image_filename = warehouse_path(Image::IMAGE_DIR, $image_obj->hash);
$fh = \Safe\fopen($image_filename, 'rb');
//check if gif is animated (via https://www.php.net/manual/en/function.imagecreatefromgif.php#104473)
while (!feof($fh) && $isanigif < 2) {
$chunk = \Safe\fread($fh, 1024 * 100);
$isanigif += preg_match_all('#\x00\x21\xF9\x04.{4}\x00[\x2C\x21]#s', $chunk, $matches);
}
}
if ($isanigif == 0) {
$this->resize_image($image_obj, $width, $height);
//Need to generate thumbnail again...
//This only seems to be an issue if one of the sizes was set to 0.
$image_obj = Image::by_id_ex($image_obj->id); //Must be a better way to grab the new hash than setting this again..
send_event(new ThumbnailGenerationEvent($image_obj, true));
log_info("resize", ">>{$image_obj->id} has been resized to: ".$width."x".$height);
//TODO: Notify user that image has been resized.
}
}
}
public function onPageRequest(PageRequestEvent $event): void
{
global $page, $user;
if ($event->page_matches("resize/{image_id}", method: "POST", permission: Permissions::EDIT_FILES)) {
// Try to get the image ID
$image_id = $event->get_iarg('image_id');
$image = Image::by_id_ex($image_id);
/* Check if options were given to resize an image. */
$width = int_escape($event->get_POST('resize_width'));
$height = int_escape($event->get_POST('resize_height'));
if ($width || $height) {
$this->resize_image($image, $width, $height);
$page->set_mode(PageMode::REDIRECT);
$page->set_redirect(make_link("post/view/".$image_id));
}
}
}
public function onImageDownloading(ImageDownloadingEvent $event): void
{
global $config, $user;
if ($config->get_bool(ResizeConfig::GET_ENABLED) &&
$user->can(Permissions::EDIT_FILES) &&
$this->can_resize_mime($event->image->get_mime())) {
if (isset($event->params['max_height'])) {
$max_height = int_escape($event->params['max_height']);
} else {
$max_height = $event->image->height;
}
if (isset($event->params['max_width'])) {
$max_width = int_escape($event->params['max_width']);
} else {
$max_width = $event->image->width;
}
[$new_width, $new_height] = get_scaled_by_aspect_ratio($event->image->width, $event->image->height, $max_width, $max_height);
if ($new_width !== $event->image->width || $new_height !== $event->image->height) {
$tmp_filename = shm_tempnam('resize');
if (empty($tmp_filename)) {
throw new ImageResizeException("Unable to save temporary image file.");
}
send_event(new MediaResizeEvent(
$config->get_string(ResizeConfig::ENGINE),
$event->path,
$event->mime,
$tmp_filename,
$new_width,
$new_height
));
if ($event->file_modified === true && $event->path != $event->image->get_image_filename()) {
// This means that we're dealing with a temp file that will need cleaned up
unlink($event->path);
}
$event->path = $tmp_filename;
$event->file_modified = true;
}
}
}
private function can_resize_mime(string $mime): bool
{
global $config;
$engine = $config->get_string(ResizeConfig::ENGINE);
return MediaEngine::is_input_supported($engine, $mime)
&& MediaEngine::is_output_supported($engine, $mime);
}
// Private functions
/* ----------------------------- */
private function resize_image(Image $image_obj, int $width, int $height): void
{
global $config;
if (($height <= 0) && ($width <= 0)) {
throw new ImageResizeException("Invalid options for height and width. ($width x $height)");
}
$engine = $config->get_string(ResizeConfig::ENGINE);
if (!$this->can_resize_mime($image_obj->get_mime())) {
throw new ImageResizeException("Engine $engine cannot resize selected image");
}
$hash = $image_obj->hash;
$image_filename = warehouse_path(Image::IMAGE_DIR, $hash);
$info = \Safe\getimagesize($image_filename);
if (($image_obj->width != $info[0]) || ($image_obj->height != $info[1])) {
throw new ImageResizeException("The current image size does not match what is set in the database! - Aborting Resize.");
}
list($new_height, $new_width) = $this->calc_new_size($image_obj, $width, $height);
/* Temp storage while we resize */
$tmp_filename = shm_tempnam('resize');
if (empty($tmp_filename)) {
throw new ImageResizeException("Unable to save temporary image file.");
}
send_event(new MediaResizeEvent(
$engine,
$image_filename,
$image_obj->get_mime(),
$tmp_filename,
$new_width,
$new_height,
Media::RESIZE_TYPE_STRETCH
));
send_event(new ImageReplaceEvent($image_obj, $tmp_filename));
log_info("resize", "Resized >>{$image_obj->id} - New hash: {$image_obj->hash}");
}
/**
* @return int[]
*/
private function calc_new_size(Image $image_obj, int $width, int $height): array
{
/* Calculate the new size of the image */
if ($height > 0 && $width > 0) {
$new_height = $height;
$new_width = $width;
return [$new_height, $new_width];
} else {
// Scale the new image
if ($width == 0) {
$factor = $height / $image_obj->height;
} elseif ($height == 0) {
$factor = $width / $image_obj->width;
} else {
$factor = min($width / $image_obj->width, $height / $image_obj->height);
}
$new_width = (int)round($image_obj->width * $factor);
$new_height = (int)round($image_obj->height * $factor);
return [$new_height, $new_width];
}
}
}