mirror of https://github.com/friendica/friendica
873 lines
21 KiB
PHP
873 lines
21 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2024, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Object;
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use Exception;
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use Friendica\DI;
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use Friendica\Util\Images;
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use Imagick;
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use ImagickDraw;
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use ImagickPixel;
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use GDImage;
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use kornrunner\Blurhash\Blurhash;
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/**
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* Class to handle images
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*/
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class Image
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{
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/** @var GDImage|Imagick|resource */
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private $image;
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/*
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* Put back gd stuff, not everybody have Imagick
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*/
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private $imagick;
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private $width;
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private $height;
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private $valid;
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private $outputType;
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private $originType;
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private $filename;
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/**
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* Constructor
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*
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* @param string $data Image data
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* @param string $type optional, default ''
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* @param string $filename optional, default ''
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* @param string $imagick optional, default 'true'
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public function __construct(string $data, string $type = '', string $filename = '', bool $imagick = true)
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{
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$this->filename = $filename;
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$type = Images::addMimeTypeByDataIfInvalid($type, $data);
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$type = Images::addMimeTypeByExtensionIfInvalid($type, $filename);
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if (Images::isSupportedMimeType($type)) {
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$this->originType = $this->outputType = Images::getImageTypeByMimeType($type);
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} elseif (($type == '') || substr($type, 0, 6) == 'image/' || substr($type, 0, 12) == ' application/') {
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$this->originType = IMAGETYPE_UNKNOWN;
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$this->outputType = IMAGETYPE_WEBP;
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DI::logger()->debug('Unhandled image mime type, use WebP instead', ['type' => $type, 'filename' => $filename, 'size' => strlen($data)]);
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} else {
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DI::logger()->debug('Unhandled mime type', ['type' => $type, 'filename' => $filename, 'size' => strlen($data)]);
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$this->valid = false;
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return;
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}
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$this->imagick = $imagick && $this->useImagick($data);
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if ($this->isImagick() && (empty($data) || $this->loadData($data))) {
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$this->valid = !empty($data);
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return;
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} else {
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// Failed to load with Imagick, fallback
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$this->imagick = false;
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}
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$this->loadData($data);
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}
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/**
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* Check if Imagick will be used
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*
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* @param string $data
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* @return boolean
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*/
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private function useImagick(string $data): bool
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{
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if (!class_exists('Imagick')) {
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return false;
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}
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if ($this->outputType == IMAGETYPE_PNG) {
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return true;
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}
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if ($this->originType == IMAGETYPE_GIF) {
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$count = preg_match_all("#\\x00\\x21\\xF9\\x04.{4}\\x00[\\x2C\\x21]#s", $data);
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return ($count > 0);
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}
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return (($this->originType == IMAGETYPE_WEBP) && $this->isAnimatedWebP(substr($data, 0, 90)));
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}
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/**
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* Detect if a WebP image is animated.
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* @see https://www.php.net/manual/en/function.imagecreatefromwebp.php#126269
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* @param string $data
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* @return boolean
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*/
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private function isAnimatedWebP(string $data) {
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$header_format = 'A4Riff/I1Filesize/A4Webp/A4Vp/A74Chunk';
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$header = @unpack($header_format, $data);
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if (!isset($header['Riff']) || strtoupper($header['Riff']) !== 'RIFF') {
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return false;
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}
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if (!isset($header['Webp']) || strtoupper($header['Webp']) !== 'WEBP') {
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return false;
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}
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if (!isset($header['Vp']) || strpos(strtoupper($header['Vp']), 'VP8') === false) {
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return false;
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}
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return strpos(strtoupper($header['Chunk']), 'ANIM') !== false || strpos(strtoupper($header['Chunk']), 'ANMF') !== false;
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}
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/**
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* Destructor
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*
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* @return void
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*/
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public function __destruct()
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{
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if ($this->image) {
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if ($this->isImagick()) {
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$this->image->clear();
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$this->image->destroy();
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return;
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}
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if (is_resource($this->image)) {
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imagedestroy($this->image);
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}
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}
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}
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/**
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* @return boolean
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*/
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public function isImagick()
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{
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return $this->imagick;
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}
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/**
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* Loads image data into handler class
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*
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* @param string $data Image data
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* @return boolean Success
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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private function loadData(string $data): bool
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{
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if ($this->isImagick()) {
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$this->image = new Imagick();
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try {
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$this->image->readImageBlob($data);
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} catch (Exception $e) {
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// Imagick couldn't use the data
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DI::logger()->debug('Error during readImageBlob', ['message' => $e->getMessage(), 'code' => $e->getCode(), 'trace' => $e->getTraceAsString(), 'previous' => $e->getPrevious(), 'file' => $this->filename]);
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return false;
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}
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/*
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* Setup the image to the format it will be saved to
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*/
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$this->image->setFormat(Images::getImagickFormatByImageType($this->outputType));
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// Always coalesce, if it is not a multi-frame image it won't hurt anyway
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try {
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$this->image = $this->image->coalesceImages();
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} catch (Exception $e) {
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DI::logger()->debug('Error during coalesceImages', ['message' => $e->getMessage(), 'code' => $e->getCode(), 'trace' => $e->getTraceAsString(), 'previous' => $e->getPrevious(), 'file' => $this->filename]);
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return false;
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}
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/*
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* setup the compression here, so we'll do it only once
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*/
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switch ($this->getImageType()) {
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case IMAGETYPE_PNG:
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$quality = DI::config()->get('system', 'png_quality');
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/*
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* From http://www.imagemagick.org/script/command-line-options.php#quality:
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*
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* 'For the MNG and PNG image formats, the quality value sets
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* the zlib compression level (quality / 10) and filter-type (quality % 10).
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* The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
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* unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
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*/
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$quality = $quality * 10;
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$this->image->setImageCompressionQuality($quality);
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break;
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case IMAGETYPE_JPEG:
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$quality = DI::config()->get('system', 'jpeg_quality');
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$this->image->setImageCompressionQuality($quality);
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}
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$this->width = $this->image->getImageWidth();
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$this->height = $this->image->getImageHeight();
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$this->valid = !empty($this->image);
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return $this->valid;
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}
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$this->valid = false;
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try {
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$this->image = @imagecreatefromstring($data);
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if ($this->image !== false) {
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$this->width = imagesx($this->image);
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$this->height = imagesy($this->image);
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$this->valid = true;
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imagealphablending($this->image, false);
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imagesavealpha($this->image, true);
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imageinterlace($this->image, true);
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return true;
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}
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} catch (\Throwable $error) {
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/** @see https://github.com/php/doc-en/commit/d09a881a8e9059d11e756ee59d75bf404d6941ed */
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if (strstr($error->getMessage(), "gd-webp cannot allocate temporary buffer")) {
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DI::logger()->notice('Image is probably animated and therefore unsupported', ['message' => $error->getMessage(), 'code' => $error->getCode(), 'trace' => $error->getTraceAsString(), 'file' => $this->filename]);
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} else {
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DI::logger()->warning('Unexpected throwable.', ['message' => $error->getMessage(), 'code' => $error->getCode(), 'trace' => $error->getTraceAsString(), 'file' => $this->filename]);
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}
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}
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return false;
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}
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/**
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* @return boolean
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*/
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public function isValid(): bool
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{
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if ($this->isImagick()) {
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return !empty($this->image);
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}
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return $this->valid;
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}
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/**
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* @return mixed
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*/
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public function getWidth()
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{
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if (!$this->isValid()) {
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return false;
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}
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return $this->width;
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}
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/**
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* @return mixed
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*/
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public function getHeight()
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{
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if (!$this->isValid()) {
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return false;
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}
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return $this->height;
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}
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/**
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* @return mixed
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*/
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public function getImage()
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{
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if (!$this->isValid()) {
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return false;
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}
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if ($this->isImagick()) {
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try {
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/* Clean it */
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$this->image = $this->image->deconstructImages();
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return $this->image;
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} catch (Exception $e) {
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return false;
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}
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}
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return $this->image;
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}
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/**
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* @return mixed
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*/
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public function getType()
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{
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if (!$this->isValid()) {
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return false;
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}
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return image_type_to_mime_type($this->outputType);
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}
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/**
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* @return mixed
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*/
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public function getImageType()
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{
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if (!$this->isValid()) {
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return false;
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}
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return $this->outputType;
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}
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/**
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* @return mixed
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*/
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public function getExt()
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{
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if (!$this->isValid()) {
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return false;
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}
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return Images::getExtensionByImageType($this->outputType);
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}
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/**
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* Scales image down
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*
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* @param integer $max max dimension
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* @return mixed
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*/
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public function scaleDown(int $max)
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{
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if (!$this->isValid()) {
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return false;
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}
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$width = $this->getWidth();
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$height = $this->getHeight();
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$scale = Images::getScalingDimensions($width, $height, $max);
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if ($scale) {
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return $this->scale($scale['width'], $scale['height']);
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} else {
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return false;
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}
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}
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/**
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* Rotates image
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*
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* @param integer $degrees degrees to rotate image
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* @return mixed
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*/
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public function rotate(int $degrees)
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{
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if (!$this->isValid()) {
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return false;
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}
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if ($this->isImagick()) {
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$this->image->setFirstIterator();
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do {
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$this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
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} while ($this->image->nextImage());
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$this->width = $this->image->getImageWidth();
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$this->height = $this->image->getImageHeight();
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return;
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}
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// if script dies at this point check memory_limit setting in php.ini
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$this->image = imagerotate($this->image, $degrees, 0);
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$this->width = imagesx($this->image);
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$this->height = imagesy($this->image);
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}
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/**
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* Flips image
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*
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* @param boolean $horiz optional, default true
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* @param boolean $vert optional, default false
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* @return mixed
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*/
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public function flip(bool $horiz = true, bool $vert = false)
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{
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if (!$this->isValid()) {
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return false;
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}
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if ($this->isImagick()) {
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$this->image->setFirstIterator();
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do {
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if ($horiz) {
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$this->image->flipImage();
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}
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if ($vert) {
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$this->image->flopImage();
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}
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} while ($this->image->nextImage());
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return;
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}
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$w = imagesx($this->image);
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$h = imagesy($this->image);
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$flipped = imagecreate($w, $h);
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if ($horiz) {
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for ($x = 0; $x < $w; $x++) {
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imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
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}
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}
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if ($vert) {
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for ($y = 0; $y < $h; $y++) {
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imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
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}
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}
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$this->image = $flipped;
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}
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/**
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* Fixes orientation and maybe returns EXIF data (?)
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*
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* @param string $filename Filename
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* @return mixed
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*/
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public function orient(string $filename)
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{
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if ($this->isImagick()) {
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// based off comment on http://php.net/manual/en/imagick.getimageorientation.php
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$orientation = $this->image->getImageOrientation();
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switch ($orientation) {
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case Imagick::ORIENTATION_BOTTOMRIGHT:
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$this->rotate(180);
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break;
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case Imagick::ORIENTATION_RIGHTTOP:
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$this->rotate(-90);
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break;
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case Imagick::ORIENTATION_LEFTBOTTOM:
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$this->rotate(90);
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break;
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}
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$this->image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
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return true;
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}
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// based off comment on http://php.net/manual/en/function.imagerotate.php
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if (!$this->isValid()) {
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return false;
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}
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if ((!function_exists('exif_read_data')) || ($this->getImageType() !== IMAGETYPE_JPEG)) {
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return;
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}
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$exif = @exif_read_data($filename, null, true);
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if (!$exif) {
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return;
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}
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$ort = isset($exif['IFD0']['Orientation']) ? $exif['IFD0']['Orientation'] : 1;
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switch ($ort) {
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case 1: // nothing
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break;
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case 2: // horizontal flip
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$this->flip();
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break;
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case 3: // 180 rotate left
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$this->rotate(180);
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break;
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case 4: // vertical flip
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$this->flip(false, true);
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break;
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case 5: // vertical flip + 90 rotate right
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$this->flip(false, true);
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$this->rotate(-90);
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break;
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case 6: // 90 rotate right
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$this->rotate(-90);
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break;
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case 7: // horizontal flip + 90 rotate right
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$this->flip();
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$this->rotate(-90);
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break;
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case 8: // 90 rotate left
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$this->rotate(90);
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break;
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}
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return $exif;
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}
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/**
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* Rescales image to minimum size
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*
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* @param integer $min Minimum dimension
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* @return mixed
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*/
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public function scaleUp(int $min)
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{
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if (!$this->isValid()) {
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return false;
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}
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$width = $this->getWidth();
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$height = $this->getHeight();
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if ((!$width)|| (!$height)) {
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return false;
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}
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if ($width < $min && $height < $min) {
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if ($width > $height) {
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$dest_width = $min;
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$dest_height = intval(($height * $min) / $width);
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} else {
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$dest_width = intval(($width * $min) / $height);
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$dest_height = $min;
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}
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} else {
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if ($width < $min) {
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$dest_width = $min;
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$dest_height = intval(($height * $min) / $width);
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} else {
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if ($height < $min) {
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$dest_width = intval(($width * $min) / $height);
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$dest_height = $min;
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} else {
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$dest_width = $width;
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$dest_height = $height;
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}
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}
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}
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return $this->scale($dest_width, $dest_height);
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}
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/**
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* Scales image to square
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*
|
|
* @param integer $dim Dimension
|
|
* @return mixed
|
|
*/
|
|
public function scaleToSquare(int $dim)
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
return $this->scale($dim, $dim);
|
|
}
|
|
|
|
/**
|
|
* Scale image to target dimensions
|
|
*
|
|
* @param int $dest_width Destination width
|
|
* @param int $dest_height Destination height
|
|
* @return boolean Success
|
|
*/
|
|
private function scale(int $dest_width, int $dest_height): bool
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
if ($dest_width <= 0 || $dest_height <= 0) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
/*
|
|
* If it is not animated, there will be only one iteration here,
|
|
* so don't bother checking
|
|
*/
|
|
// Don't forget to go back to the first frame
|
|
$this->image->setFirstIterator();
|
|
do {
|
|
// FIXME - implement horizontal bias for scaling as in following GD functions
|
|
// to allow very tall images to be constrained only horizontally.
|
|
try {
|
|
$this->image->scaleImage($dest_width, $dest_height);
|
|
} catch (Exception $e) {
|
|
// Imagick couldn't use the data
|
|
return false;
|
|
}
|
|
} while ($this->image->nextImage());
|
|
|
|
$this->width = $this->image->getImageWidth();
|
|
$this->height = $this->image->getImageHeight();
|
|
} else {
|
|
$dest = imagecreatetruecolor($dest_width, $dest_height);
|
|
imagealphablending($dest, false);
|
|
imagesavealpha($dest, true);
|
|
|
|
if ($this->outputType == IMAGETYPE_PNG) {
|
|
imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
|
|
}
|
|
|
|
imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $this->width, $this->height);
|
|
|
|
if ($this->image) {
|
|
imagedestroy($this->image);
|
|
}
|
|
|
|
$this->image = $dest;
|
|
$this->width = imagesx($this->image);
|
|
$this->height = imagesy($this->image);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Convert a GIF to a PNG to make it static
|
|
*
|
|
* @return void
|
|
*/
|
|
public function toStatic()
|
|
{
|
|
if ($this->outputType != IMAGETYPE_GIF) {
|
|
return;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
$this->outputType = IMAGETYPE_PNG;
|
|
$this->image->setFormat(Images::getImagickFormatByImageType($this->outputType));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Crops image
|
|
*
|
|
* @param integer $max maximum
|
|
* @param integer $x x coordinate
|
|
* @param integer $y y coordinate
|
|
* @param integer $w width
|
|
* @param integer $h height
|
|
* @return mixed
|
|
*/
|
|
public function crop(int $max, int $x, int $y, int $w, int $h)
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
$this->image->setFirstIterator();
|
|
do {
|
|
$this->image->cropImage($w, $h, $x, $y);
|
|
/*
|
|
* We need to remove the canvas,
|
|
* or the image is not resized to the crop:
|
|
* http://php.net/manual/en/imagick.cropimage.php#97232
|
|
*/
|
|
$this->image->setImagePage(0, 0, 0, 0);
|
|
} while ($this->image->nextImage());
|
|
return $this->scaleDown($max);
|
|
}
|
|
|
|
$dest = imagecreatetruecolor($max, $max);
|
|
imagealphablending($dest, false);
|
|
imagesavealpha($dest, true);
|
|
|
|
if ($this->outputType == IMAGETYPE_PNG) {
|
|
imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
|
|
}
|
|
imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
|
|
if ($this->image) {
|
|
imagedestroy($this->image);
|
|
}
|
|
$this->image = $dest;
|
|
$this->width = imagesx($this->image);
|
|
$this->height = imagesy($this->image);
|
|
|
|
// All successful
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Magic method allowing string casting of an Image object
|
|
*
|
|
* Ex: $data = $Image->asString();
|
|
* can be replaced by
|
|
* $data = (string) $Image;
|
|
*
|
|
* @return string
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public function __toString(): string
|
|
{
|
|
return (string) $this->asString();
|
|
}
|
|
|
|
/**
|
|
* Returns image as string or false on failure
|
|
*
|
|
* @return mixed
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public function asString()
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
try {
|
|
/* Clean it */
|
|
$this->image = $this->image->deconstructImages();
|
|
return $this->image->getImagesBlob();
|
|
} catch (Exception $e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$stream = fopen('php://memory','r+');
|
|
|
|
switch ($this->getImageType()) {
|
|
case IMAGETYPE_PNG:
|
|
$quality = DI::config()->get('system', 'png_quality');
|
|
imagepng($this->image, $stream, $quality);
|
|
break;
|
|
|
|
case IMAGETYPE_JPEG:
|
|
$quality = DI::config()->get('system', 'jpeg_quality');
|
|
imagejpeg($this->image, $stream, $quality);
|
|
break;
|
|
|
|
case IMAGETYPE_GIF:
|
|
imagegif($this->image, $stream);
|
|
break;
|
|
|
|
case IMAGETYPE_WEBP:
|
|
@imagewebp($this->image, $stream, DI::config()->get('system', 'jpeg_quality'));
|
|
break;
|
|
|
|
case IMAGETYPE_BMP:
|
|
imagebmp($this->image, $stream);
|
|
break;
|
|
}
|
|
rewind($stream);
|
|
return stream_get_contents($stream);
|
|
}
|
|
|
|
/**
|
|
* Create a blurhash out of a given image string
|
|
*
|
|
* @param string $img_str
|
|
* @return string
|
|
*/
|
|
public function getBlurHash(): string
|
|
{
|
|
$image = New Image($this->asString(), $this->getType(), $this->filename, false);
|
|
if (empty($image) || !$this->isValid()) {
|
|
return '';
|
|
}
|
|
|
|
$width = $image->getWidth();
|
|
$height = $image->getHeight();
|
|
|
|
if (max($width, $height) > 90) {
|
|
$image->scaleDown(90);
|
|
$width = $image->getWidth();
|
|
$height = $image->getHeight();
|
|
}
|
|
|
|
if (empty($width) || empty($height)) {
|
|
return '';
|
|
}
|
|
|
|
$pixels = [];
|
|
for ($y = 0; $y < $height; ++$y) {
|
|
$row = [];
|
|
for ($x = 0; $x < $width; ++$x) {
|
|
if ($image->isImagick()) {
|
|
try {
|
|
$colors = $image->image->getImagePixelColor($x, $y)->getColor();
|
|
} catch (\Exception $exception) {
|
|
return '';
|
|
}
|
|
$row[] = [$colors['r'], $colors['g'], $colors['b']];
|
|
} else {
|
|
$index = imagecolorat($image->image, $x, $y);
|
|
$colors = @imagecolorsforindex($image->image, $index);
|
|
$row[] = [$colors['red'], $colors['green'], $colors['blue']];
|
|
}
|
|
}
|
|
$pixels[] = $row;
|
|
}
|
|
|
|
// The components define the amount of details (1 to 9).
|
|
$components_x = 9;
|
|
$components_y = 9;
|
|
|
|
return Blurhash::encode($pixels, $components_x, $components_y);
|
|
}
|
|
|
|
/**
|
|
* Create an image out of a blurhash
|
|
*
|
|
* @param string $blurhash
|
|
* @param integer $width
|
|
* @param integer $height
|
|
* @return void
|
|
*/
|
|
public function getFromBlurHash(string $blurhash, int $width, int $height)
|
|
{
|
|
$scaled = Images::getScalingDimensions($width, $height, 90);
|
|
$pixels = Blurhash::decode($blurhash, $scaled['width'], $scaled['height']);
|
|
|
|
if ($this->isImagick()) {
|
|
$this->image = new Imagick();
|
|
$draw = new ImagickDraw();
|
|
$this->image->newImage($scaled['width'], $scaled['height'], '', 'png');
|
|
} else {
|
|
$this->image = imagecreatetruecolor($scaled['width'], $scaled['height']);
|
|
}
|
|
|
|
for ($y = 0; $y < $scaled['height']; ++$y) {
|
|
for ($x = 0; $x < $scaled['width']; ++$x) {
|
|
[$r, $g, $b] = $pixels[$y][$x];
|
|
if ($this->isImagick()) {
|
|
$draw->setFillColor("rgb($r, $g, $b)");
|
|
$draw->point($x, $y);
|
|
} else {
|
|
imagesetpixel($this->image, $x, $y, imagecolorallocate($this->image, $r, $g, $b));
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
$this->image->drawImage($draw);
|
|
$this->width = $this->image->getImageWidth();
|
|
$this->height = $this->image->getImageHeight();
|
|
} else {
|
|
$this->width = imagesx($this->image);
|
|
$this->height = imagesy($this->image);
|
|
}
|
|
|
|
$this->valid = !empty($this->image);
|
|
|
|
$this->scaleUp(min($width, $height));
|
|
}
|
|
}
|