465 lines
16 KiB
PHP
465 lines
16 KiB
PHP
<?php
|
|
/*
|
|
* Name: Transcode Image
|
|
* Author: Matthew Barbour <matthew@darkholme.net>
|
|
* Description: Allows admins to automatically and manually transcode images.
|
|
* License: MIT
|
|
* Version: 1.0
|
|
* Documentation:
|
|
* Can transcode on-demand and automatically on upload. Config screen allows choosing an output format for each of the supported input formats.
|
|
* Supports GD and ImageMagick. Both support bmp, gif, jpg, png, and webp as inputs, and jpg, png, and lossy webp as outputs.
|
|
* ImageMagick additionally supports tiff and psd inputs, and webp lossless output.
|
|
* If and image is uanble to be transcoded for any reason, the upload will continue unaffected.
|
|
*/
|
|
|
|
/*
|
|
* This is used by the image transcoding code when there is an error while transcoding
|
|
*/
|
|
class ImageTranscodeException extends SCoreException
|
|
{
|
|
}
|
|
|
|
|
|
class TranscodeImage extends Extension
|
|
{
|
|
const CONVERSION_ENGINES = [
|
|
"GD" => "gd",
|
|
"ImageMagick" => "convert",
|
|
];
|
|
|
|
const ENGINE_INPUT_SUPPORT = [
|
|
"gd" => [
|
|
"bmp",
|
|
"gif",
|
|
"jpg",
|
|
"png",
|
|
"webp",
|
|
],
|
|
"convert" => [
|
|
"bmp",
|
|
"gif",
|
|
"jpg",
|
|
"png",
|
|
"psd",
|
|
"tiff",
|
|
"webp",
|
|
"ico",
|
|
]
|
|
];
|
|
|
|
const ENGINE_OUTPUT_SUPPORT = [
|
|
"gd" => [
|
|
"jpg",
|
|
"png",
|
|
"webp-lossy",
|
|
],
|
|
"convert" => [
|
|
"jpg",
|
|
"png",
|
|
"webp-lossy",
|
|
"webp-lossless",
|
|
]
|
|
];
|
|
|
|
const LOSSLESS_FORMATS = [
|
|
"webp-lossless",
|
|
"png",
|
|
];
|
|
|
|
const INPUT_FORMATS = [
|
|
"BMP" => "bmp",
|
|
"GIF" => "gif",
|
|
"ICO" => "ico",
|
|
"JPG" => "jpg",
|
|
"PNG" => "png",
|
|
"PSD" => "psd",
|
|
"TIFF" => "tiff",
|
|
"WEBP" => "webp",
|
|
];
|
|
|
|
const FORMAT_ALIASES = [
|
|
"tif" => "tiff",
|
|
"jpeg" => "jpg",
|
|
];
|
|
|
|
const OUTPUT_FORMATS = [
|
|
"" => "",
|
|
"JPEG (lossy)" => "jpg",
|
|
"PNG (lossless)" => "png",
|
|
"WEBP (lossy)" => "webp-lossy",
|
|
"WEBP (lossless)" => "webp-lossless",
|
|
];
|
|
|
|
/**
|
|
* Needs to be after upload, but before the processing extensions
|
|
*/
|
|
public function get_priority(): int
|
|
{
|
|
return 45;
|
|
}
|
|
|
|
|
|
public function onInitExt(InitExtEvent $event)
|
|
{
|
|
global $config;
|
|
$config->set_default_bool('transcode_enabled', true);
|
|
$config->set_default_bool('transcode_upload', false);
|
|
$config->set_default_string('transcode_engine', "gd");
|
|
$config->set_default_int('transcode_quality', 80);
|
|
|
|
foreach (array_values(self::INPUT_FORMATS) as $format) {
|
|
$config->set_default_string('transcode_upload_'.$format, "");
|
|
}
|
|
}
|
|
|
|
public function onImageAdminBlockBuilding(ImageAdminBlockBuildingEvent $event)
|
|
{
|
|
global $user, $config;
|
|
|
|
if ($user->is_admin() && $config->get_bool("resize_enabled")) {
|
|
$engine = $config->get_string("transcode_engine");
|
|
if ($this->can_convert_format($engine, $event->image->ext)) {
|
|
$options = $this->get_supported_output_formats($engine, $event->image->ext);
|
|
$event->add_part($this->theme->get_transcode_html($event->image, $options));
|
|
}
|
|
}
|
|
}
|
|
|
|
public function onSetupBuilding(SetupBuildingEvent $event)
|
|
{
|
|
global $config;
|
|
|
|
$engine = $config->get_string("transcode_engine");
|
|
|
|
|
|
$sb = new SetupBlock("Image Transcode");
|
|
$sb->add_bool_option("transcode_enabled", "Allow transcoding images: ");
|
|
$sb->add_bool_option("transcode_upload", "<br>Transcode on upload: ");
|
|
$sb->add_choice_option('transcode_engine', self::CONVERSION_ENGINES, "<br />Transcode engine: ");
|
|
foreach (self::INPUT_FORMATS as $display=>$format) {
|
|
if (in_array($format, self::ENGINE_INPUT_SUPPORT[$engine])) {
|
|
$outputs = $this->get_supported_output_formats($engine, $format);
|
|
$sb->add_choice_option('transcode_upload_'.$format, $outputs, "<br />$display to: ");
|
|
}
|
|
}
|
|
$sb->add_int_option("transcode_quality", "<br/>Lossy format quality: ");
|
|
$event->panel->add_block($sb);
|
|
}
|
|
|
|
public function onDataUpload(DataUploadEvent $event)
|
|
{
|
|
global $config, $page;
|
|
|
|
if ($config->get_bool("transcode_upload") == true) {
|
|
$ext = strtolower($event->type);
|
|
|
|
$ext = $this->clean_format($ext);
|
|
|
|
if ($event->type=="gif"&&is_animated_gif($event->tmpname)) {
|
|
return;
|
|
}
|
|
|
|
if (in_array($ext, array_values(self::INPUT_FORMATS))) {
|
|
$target_format = $config->get_string("transcode_upload_".$ext);
|
|
if (empty($target_format)) {
|
|
return;
|
|
}
|
|
try {
|
|
$new_image = $this->transcode_image($event->tmpname, $ext, $target_format);
|
|
$event->set_type($this->determine_ext($target_format));
|
|
$event->set_tmpname($new_image);
|
|
} catch (Exception $e) {
|
|
log_error("transcode", "Error while performing upload transcode: ".$e->getMessage());
|
|
// We don't want to interfere with the upload process,
|
|
// so if something goes wrong the untranscoded image jsut continues
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
public function onPageRequest(PageRequestEvent $event)
|
|
{
|
|
global $page, $user;
|
|
|
|
if ($event->page_matches("transcode") && $user->is_admin()) {
|
|
$image_id = int_escape($event->get_arg(0));
|
|
if (empty($image_id)) {
|
|
$image_id = isset($_POST['image_id']) ? int_escape($_POST['image_id']) : null;
|
|
}
|
|
// Try to get the image ID
|
|
if (empty($image_id)) {
|
|
throw new ImageTranscodeException("Can not resize Image: No valid Image ID given.");
|
|
}
|
|
$image_obj = Image::by_id($image_id);
|
|
if (is_null($image_obj)) {
|
|
$this->theme->display_error(404, "Image not found", "No image in the database has the ID #$image_id");
|
|
} else {
|
|
if (isset($_POST['transcode_format'])) {
|
|
try {
|
|
$this->transcode_and_replace_image($image_obj, $_POST['transcode_format']);
|
|
$page->set_mode("redirect");
|
|
$page->set_redirect(make_link("post/view/".$image_id));
|
|
} catch (ImageTranscodeException $e) {
|
|
$this->theme->display_transcode_error($page, "Error Transcoding", $e->getMessage());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
public function onBulkActionBlockBuilding(BulkActionBlockBuildingEvent $event)
|
|
{
|
|
global $user, $config;
|
|
|
|
$engine = $config->get_string("transcode_engine");
|
|
|
|
if ($user->is_admin()) {
|
|
$event->add_action("bulk_transcode", "Transcode", "", $this->theme->get_transcode_picker_html($this->get_supported_output_formats($engine)));
|
|
}
|
|
}
|
|
|
|
public function onBulkAction(BulkActionEvent $event)
|
|
{
|
|
global $user, $database;
|
|
|
|
switch ($event->action) {
|
|
case "bulk_transcode":
|
|
if (!isset($_POST['transcode_format'])) {
|
|
return;
|
|
}
|
|
if ($user->is_admin()) {
|
|
$format = $_POST['transcode_format'];
|
|
$total = 0;
|
|
foreach ($event->items as $id) {
|
|
try {
|
|
$database->beginTransaction();
|
|
$image = Image::by_id($id);
|
|
if ($image==null) {
|
|
continue;
|
|
}
|
|
|
|
$this->transcode_and_replace_image($image, $format);
|
|
// If a subsequent transcode fails, the database need to have everything about the previous transcodes recorded already,
|
|
// otherwise the image entries will be stuck pointing to missing image files
|
|
$database->commit();
|
|
$total++;
|
|
} catch (Exception $e) {
|
|
log_error("transcode", "Error while bulk transcode on item $id to $format: ".$e->getMessage());
|
|
try {
|
|
$database->rollback();
|
|
} catch (Exception $e) {
|
|
}
|
|
}
|
|
}
|
|
flash_message("Transcoded $total items");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
private function clean_format($format): ?string
|
|
{
|
|
if (array_key_exists($format, self::FORMAT_ALIASES)) {
|
|
return self::FORMAT_ALIASES[$format];
|
|
}
|
|
return $format;
|
|
}
|
|
|
|
private function can_convert_format($engine, $format): bool
|
|
{
|
|
$format = $this->clean_format($format);
|
|
if (!in_array($format, self::ENGINE_INPUT_SUPPORT[$engine])) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private function get_supported_output_formats($engine, ?String $omit_format = null): array
|
|
{
|
|
$omit_format = $this->clean_format($omit_format);
|
|
$output = [];
|
|
foreach (self::OUTPUT_FORMATS as $key=>$value) {
|
|
if ($value=="") {
|
|
$output[$key] = $value;
|
|
continue;
|
|
}
|
|
if (in_array($value, self::ENGINE_OUTPUT_SUPPORT[$engine])
|
|
&&(empty($omit_format)||$omit_format!=$this->determine_ext($value))) {
|
|
$output[$key] = $value;
|
|
}
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
private function determine_ext(String $format): String
|
|
{
|
|
switch ($format) {
|
|
case "webp-lossless":
|
|
case "webp-lossy":
|
|
return "webp";
|
|
default:
|
|
return $format;
|
|
}
|
|
}
|
|
|
|
private function transcode_and_replace_image(Image $image_obj, String $target_format)
|
|
{
|
|
$target_format = $this->clean_format($target_format);
|
|
$original_file = warehouse_path(Image::IMAGE_DIR, $image_obj->hash);
|
|
|
|
$tmp_filename = $this->transcode_image($original_file, $image_obj->ext, $target_format);
|
|
|
|
$new_image = new Image();
|
|
$new_image->hash = md5_file($tmp_filename);
|
|
$new_image->filesize = filesize($tmp_filename);
|
|
$new_image->filename = $image_obj->filename;
|
|
$new_image->width = $image_obj->width;
|
|
$new_image->height = $image_obj->height;
|
|
$new_image->ext = $this->determine_ext($target_format);
|
|
|
|
/* Move the new image into the main storage location */
|
|
$target = warehouse_path(Image::IMAGE_DIR, $new_image->hash);
|
|
if (!@copy($tmp_filename, $target)) {
|
|
throw new ImageTranscodeException("Failed to copy new image file from temporary location ({$tmp_filename}) to archive ($target)");
|
|
}
|
|
|
|
/* Remove temporary file */
|
|
@unlink($tmp_filename);
|
|
|
|
send_event(new ImageReplaceEvent($image_obj->id, $new_image));
|
|
}
|
|
|
|
|
|
private function transcode_image(String $source_name, String $source_format, string $target_format): string
|
|
{
|
|
global $config;
|
|
|
|
if ($source_format==$this->determine_ext($target_format)) {
|
|
throw new ImageTranscodeException("Source and target formats are the same: ".$source_format);
|
|
}
|
|
|
|
$engine = $config->get_string("transcode_engine");
|
|
|
|
|
|
|
|
if (!$this->can_convert_format($engine, $source_format)) {
|
|
throw new ImageTranscodeException("Engine $engine does not support input format $source_format");
|
|
}
|
|
if (!in_array($target_format, self::ENGINE_OUTPUT_SUPPORT[$engine])) {
|
|
throw new ImageTranscodeException("Engine $engine does not support output format $target_format");
|
|
}
|
|
|
|
switch ($engine) {
|
|
case "gd":
|
|
return $this->transcode_image_gd($source_name, $source_format, $target_format);
|
|
case "convert":
|
|
return $this->transcode_image_convert($source_name, $source_format, $target_format);
|
|
}
|
|
}
|
|
|
|
private function transcode_image_gd(String $source_name, String $source_format, string $target_format): string
|
|
{
|
|
global $config;
|
|
|
|
$q = $config->get_int("transcode_quality");
|
|
|
|
$tmp_name = tempnam("/tmp", "shimmie_transcode");
|
|
|
|
$image = imagecreatefromstring(file_get_contents($source_name));
|
|
try {
|
|
$result = false;
|
|
switch ($target_format) {
|
|
case "webp-lossy":
|
|
$result = imagewebp($image, $tmp_name, $q);
|
|
break;
|
|
case "png":
|
|
$result = imagepng($image, $tmp_name, 9);
|
|
break;
|
|
case "jpg":
|
|
// In case of alpha channels
|
|
$width = imagesx($image);
|
|
$height = imagesy($image);
|
|
$new_image = imagecreatetruecolor($width, $height);
|
|
if ($new_image===false) {
|
|
throw new ImageTranscodeException("Could not create image with dimensions $width x $height");
|
|
}
|
|
try {
|
|
$black = imagecolorallocate($new_image, 0, 0, 0);
|
|
if ($black===false) {
|
|
throw new ImageTranscodeException("Could not allocate background color");
|
|
}
|
|
if (imagefilledrectangle($new_image, 0, 0, $width, $height, $black)===false) {
|
|
throw new ImageTranscodeException("Could not fill background color");
|
|
}
|
|
if (imagecopy($new_image, $image, 0, 0, 0, 0, $width, $height)===false) {
|
|
throw new ImageTranscodeException("Could not copy source image to new image");
|
|
}
|
|
$result = imagejpeg($new_image, $tmp_name, $q);
|
|
} finally {
|
|
imagedestroy($new_image);
|
|
}
|
|
break;
|
|
}
|
|
if ($result===false) {
|
|
throw new ImageTranscodeException("Error while transcoding ".$source_name." to ".$target_format);
|
|
}
|
|
return $tmp_name;
|
|
} finally {
|
|
imagedestroy($image);
|
|
}
|
|
}
|
|
|
|
private function transcode_image_convert(String $source_name, String $source_format, string $target_format): string
|
|
{
|
|
global $config;
|
|
|
|
$q = $config->get_int("transcode_quality");
|
|
$convert = $config->get_string("thumb_convert_path");
|
|
|
|
if ($convert==null||$convert=="") {
|
|
throw new ImageTranscodeException("ImageMagick path not configured");
|
|
}
|
|
$ext = $this->determine_ext($target_format);
|
|
|
|
$args = " -flatten ";
|
|
$bg = "none";
|
|
switch ($target_format) {
|
|
case "webp-lossless":
|
|
$args .= '-define webp:lossless=true';
|
|
break;
|
|
case "webp-lossy":
|
|
$args .= '';
|
|
break;
|
|
case "png":
|
|
$args .= '-define png:compression-level=9';
|
|
break;
|
|
default:
|
|
$bg = "black";
|
|
break;
|
|
}
|
|
$tmp_name = tempnam("/tmp", "shimmie_transcode");
|
|
|
|
$source_type = "";
|
|
switch ($source_format) {
|
|
case "ico":
|
|
$source_type = "ico:";
|
|
}
|
|
|
|
$format = '"%s" %s -quality %u -background %s %s"%s" %s:"%s" 2>&1';
|
|
$cmd = sprintf($format, $convert, $args, $q, $bg, $source_type, $source_name, $ext, $tmp_name);
|
|
$cmd = str_replace("\"convert\"", "convert", $cmd); // quotes are only needed if the path to convert contains a space; some other times, quotes break things, see github bug #27
|
|
exec($cmd, $output, $ret);
|
|
|
|
log_debug('transcode', "Transcoding with command `$cmd`, returns $ret");
|
|
|
|
if ($ret!==0) {
|
|
throw new ImageTranscodeException("Transcoding failed with command ".$cmd.", returning ".implode("\r\n", $output));
|
|
}
|
|
|
|
return $tmp_name;
|
|
}
|
|
}
|