872 lines
19 KiB
PHP
872 lines
19 KiB
PHP
<?php
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/**
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* @file src/Object/Image.php
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* @brief This file contains the Image class for image processing
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*/
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namespace Friendica\Object;
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use Exception;
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use Friendica\Core\Cache;
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use Friendica\Core\Config;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\Util\Network;
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use Imagick;
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use ImagickPixel;
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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 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 $type;
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private $types;
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/**
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* @brief supported mimetypes and corresponding file extensions
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* @return array
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*/
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public static function supportedTypes()
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{
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if (class_exists('Imagick')) {
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// Imagick::queryFormats won't help us a lot there...
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// At least, not yet, other parts of friendica uses this array
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$t = [
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'image/jpeg' => 'jpg',
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'image/png' => 'png',
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'image/gif' => 'gif'
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];
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} else {
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$t = [];
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$t['image/jpeg'] ='jpg';
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if (imagetypes() & IMG_PNG) {
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$t['image/png'] = 'png';
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}
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}
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return $t;
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}
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/**
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* @brief Constructor
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* @param string $data
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* @param boolean $type optional, default null
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public function __construct($data, $type = null)
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{
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$this->imagick = class_exists('Imagick');
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$this->types = static::supportedTypes();
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if (!array_key_exists($type, $this->types)) {
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$type='image/jpeg';
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}
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$this->type = $type;
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if ($this->isImagick() && $this->loadData($data)) {
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return true;
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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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return $this->loadData($data);
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}
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/**
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* @brief Destructor
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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 $this->imagick;
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}
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/**
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* @brief Maps Mime types to Imagick formats
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* @return array With with image formats (mime type as key)
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*/
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public static function getFormatsMap()
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{
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$m = [
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'image/jpeg' => 'JPG',
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'image/png' => 'PNG',
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'image/gif' => 'GIF'
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];
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return $m;
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}
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/**
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* @param string $data data
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* @return boolean
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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private function loadData($data)
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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 $e) {
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// Imagick couldn't use the data
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return false;
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}
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/*
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* Setup the image to the format it will be saved to
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*/
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$map = self::getFormatsMap();
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$format = $map[$this->type];
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$this->image->setFormat($format);
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// Always coalesce, if it is not a multi-frame image it won't hurt anyway
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$this->image = $this->image->coalesceImages();
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/*
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* setup the compression here, so we'll do it only once
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*/
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switch ($this->getType()) {
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case "image/png":
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$quality = Config::get('system', 'png_quality');
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if ((! $quality) || ($quality > 9)) {
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$quality = PNG_QUALITY;
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}
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/*
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* From http://www.imagemagick.org/script/command-line-options.php#quality:
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*
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* 'For the MNG and PNG image formats, the quality value sets
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* the zlib compression level (quality / 10) and filter-type (quality % 10).
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* The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
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* unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
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*/
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$quality = $quality * 10;
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$this->image->setCompressionQuality($quality);
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break;
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case "image/jpeg":
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$quality = Config::get('system', 'jpeg_quality');
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if ((! $quality) || ($quality > 100)) {
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$quality = JPEG_QUALITY;
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}
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$this->image->setCompressionQuality($quality);
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}
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// The 'width' and 'height' properties are only used by non-Imagick routines.
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$this->width = $this->image->getImageWidth();
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$this->height = $this->image->getImageHeight();
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$this->valid = true;
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return true;
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}
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$this->valid = false;
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$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($this->image, true);
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return true;
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}
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return false;
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}
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/**
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* @return boolean
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*/
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public function isValid()
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{
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if ($this->isImagick()) {
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return ($this->image !== false);
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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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if ($this->isImagick()) {
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return $this->image->getImageWidth();
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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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if ($this->isImagick()) {
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return $this->image->getImageHeight();
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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 ($this->isImagick()) {
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/* Clean it */
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$this->image = $this->image->deconstructImages();
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return $this->image;
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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 $this->type;
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}
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/**
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* @return mixed
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*/
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public function getExt()
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{
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if (!$this->isValid()) {
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return false;
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}
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return $this->types[$this->getType()];
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}
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/**
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* @param integer $max max dimension
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* @return mixed
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*/
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public function scaleDown($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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if ((! $width)|| (! $height)) {
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return false;
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}
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if ($width > $max && $height > $max) {
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// very tall image (greater than 16:9)
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// constrain the width - let the height float.
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if ((($height * 9) / 16) > $width) {
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$dest_width = $max;
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$dest_height = intval(($height * $max) / $width);
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} elseif ($width > $height) {
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// else constrain both dimensions
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$dest_width = $max;
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$dest_height = intval(($height * $max) / $width);
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} else {
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$dest_width = intval(($width * $max) / $height);
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$dest_height = $max;
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}
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} else {
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if ($width > $max) {
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$dest_width = $max;
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$dest_height = intval(($height * $max) / $width);
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} else {
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if ($height > $max) {
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// very tall image (greater than 16:9)
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// but width is OK - don't do anything
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if ((($height * 9) / 16) > $width) {
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$dest_width = $width;
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$dest_height = $height;
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} else {
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$dest_width = intval(($width * $max) / $height);
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$dest_height = $max;
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}
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} else {
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$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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* @param integer $degrees degrees to rotate image
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* @return mixed
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*/
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public function rotate($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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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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* @param boolean $horiz optional, default true
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* @param boolean $vert optional, default false
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* @return mixed
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*/
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public function flip($horiz = true, $vert = false)
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{
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if (!$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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* @param string $filename filename
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* @return mixed
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*/
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public function orient($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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$this->image->rotateimage("#000", 180);
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break;
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case Imagick::ORIENTATION_RIGHTTOP:
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$this->image->rotateimage("#000", 90);
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break;
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case Imagick::ORIENTATION_LEFTBOTTOM:
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$this->image->rotateimage("#000", -90);
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break;
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}
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$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->getType() !== 'image/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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$this->rotate(90);
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break;
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}
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// Logger::log('exif: ' . print_r($exif,true));
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return $exif;
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}
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/**
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* @param integer $min minimum dimension
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* @return mixed
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*/
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public function scaleUp($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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* @param integer $dim dimension
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* @return mixed
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*/
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public function scaleToSquare($dim)
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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 $this->scale($dim, $dim);
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}
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/**
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* @brief Scale image to target dimensions
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*
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* @param int $dest_width
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* @param int $dest_height
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* @return boolean
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*/
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private function scale($dest_width, $dest_height)
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{
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if (!$this->isValid()) {
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return false;
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}
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if ($this->isImagick()) {
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/*
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* If it is not animated, there will be only one iteration here,
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* so don't bother checking
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*/
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// Don't forget to go back to the first frame
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$this->image->setFirstIterator();
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do {
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// FIXME - implement horizontal bias for scaling as in following GD functions
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// to allow very tall images to be constrained only horizontally.
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$this->image->scaleImage($dest_width, $dest_height);
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} while ($this->image->nextImage());
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// These may not be necessary anymore
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$this->width = $this->image->getImageWidth();
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$this->height = $this->image->getImageHeight();
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} else {
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$dest = imagecreatetruecolor($dest_width, $dest_height);
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imagealphablending($dest, false);
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imagesavealpha($dest, true);
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if ($this->type=='image/png') {
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imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
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}
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imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $this->width, $this->height);
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if ($this->image) {
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imagedestroy($this->image);
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}
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$this->image = $dest;
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$this->width = imagesx($this->image);
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$this->height = imagesy($this->image);
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}
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return true;
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}
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/**
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* @param integer $max maximum
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* @param integer $x x coordinate
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* @param integer $y y coordinate
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* @param integer $w width
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* @param integer $h height
|
|
* @return mixed
|
|
*/
|
|
public function crop($max, $x, $y, $w, $h)
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
$this->image->setFirstIterator();
|
|
do {
|
|
$this->image->cropImage($w, $h, $x, $y);
|
|
/*
|
|
* We need to remove the canva,
|
|
* 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->type=='image/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);
|
|
}
|
|
|
|
/**
|
|
* @param string $path file path
|
|
* @return mixed
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public function saveToFilePath($path)
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
$string = $this->asString();
|
|
|
|
$a = \get_app();
|
|
|
|
$stamp1 = microtime(true);
|
|
file_put_contents($path, $string);
|
|
$a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
|
|
}
|
|
|
|
/**
|
|
* @brief 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() {
|
|
return $this->asString();
|
|
}
|
|
|
|
/**
|
|
* @return mixed
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public function asString()
|
|
{
|
|
if (!$this->isValid()) {
|
|
return false;
|
|
}
|
|
|
|
if ($this->isImagick()) {
|
|
/* Clean it */
|
|
$this->image = $this->image->deconstructImages();
|
|
$string = $this->image->getImagesBlob();
|
|
return $string;
|
|
}
|
|
|
|
ob_start();
|
|
|
|
// Enable interlacing
|
|
imageinterlace($this->image, true);
|
|
|
|
switch ($this->getType()) {
|
|
case "image/png":
|
|
$quality = Config::get('system', 'png_quality');
|
|
if ((!$quality) || ($quality > 9)) {
|
|
$quality = PNG_QUALITY;
|
|
}
|
|
imagepng($this->image, null, $quality);
|
|
break;
|
|
case "image/jpeg":
|
|
$quality = Config::get('system', 'jpeg_quality');
|
|
if ((!$quality) || ($quality > 100)) {
|
|
$quality = JPEG_QUALITY;
|
|
}
|
|
imagejpeg($this->image, null, $quality);
|
|
}
|
|
$string = ob_get_contents();
|
|
ob_end_clean();
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Guess image mimetype from filename or from Content-Type header
|
|
*
|
|
* @param string $filename Image filename
|
|
* @param boolean $fromcurl Check Content-Type header from curl request
|
|
* @param string $header passed headers to take into account
|
|
*
|
|
* @return object
|
|
* @throws \ImagickException
|
|
*/
|
|
public static function guessType($filename, $fromcurl = false, $header = '')
|
|
{
|
|
Logger::log('Image: guessType: '.$filename . ($fromcurl?' from curl headers':''), Logger::DEBUG);
|
|
$type = null;
|
|
if ($fromcurl) {
|
|
$headers=[];
|
|
$h = explode("\n", $header);
|
|
foreach ($h as $l) {
|
|
$data = array_map("trim", explode(":", trim($l), 2));
|
|
if (count($data) > 1) {
|
|
list($k,$v) = $data;
|
|
$headers[$k] = $v;
|
|
}
|
|
}
|
|
if (array_key_exists('Content-Type', $headers))
|
|
$type = $headers['Content-Type'];
|
|
}
|
|
if (is_null($type)) {
|
|
// Guessing from extension? Isn't that... dangerous?
|
|
if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
|
|
/**
|
|
* Well, this not much better,
|
|
* but at least it comes from the data inside the image,
|
|
* we won't be tricked by a manipulated extension
|
|
*/
|
|
$image = new Imagick($filename);
|
|
$type = $image->getImageMimeType();
|
|
$image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
|
|
} else {
|
|
$ext = pathinfo($filename, PATHINFO_EXTENSION);
|
|
$types = self::supportedTypes();
|
|
$type = "image/jpeg";
|
|
foreach ($types as $m => $e) {
|
|
if ($ext == $e) {
|
|
$type = $m;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Logger::log('Image: guessType: type='.$type, Logger::DEBUG);
|
|
return $type;
|
|
}
|
|
|
|
/**
|
|
* @param string $url url
|
|
* @return object
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function getInfoFromURL($url)
|
|
{
|
|
$data = [];
|
|
|
|
if (empty($url)) {
|
|
return $data;
|
|
}
|
|
|
|
$data = Cache::get($url);
|
|
|
|
if (is_null($data) || !$data || !is_array($data)) {
|
|
$img_str = Network::fetchUrl($url, true, 4);
|
|
|
|
if (!$img_str) {
|
|
return false;
|
|
}
|
|
|
|
$filesize = strlen($img_str);
|
|
|
|
try {
|
|
if (function_exists("getimagesizefromstring")) {
|
|
$data = @getimagesizefromstring($img_str);
|
|
} else {
|
|
$tempfile = tempnam(get_temppath(), "cache");
|
|
|
|
$a = \get_app();
|
|
$stamp1 = microtime(true);
|
|
file_put_contents($tempfile, $img_str);
|
|
$a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
|
|
|
|
$data = getimagesize($tempfile);
|
|
unlink($tempfile);
|
|
}
|
|
} catch (Exception $e) {
|
|
return false;
|
|
}
|
|
|
|
if ($data) {
|
|
$data["size"] = $filesize;
|
|
}
|
|
|
|
Cache::set($url, $data);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @param integer $width width
|
|
* @param integer $height height
|
|
* @param integer $max max
|
|
* @return array
|
|
*/
|
|
public static function getScalingDimensions($width, $height, $max)
|
|
{
|
|
if ((!$width) || (!$height)) {
|
|
return false;
|
|
}
|
|
|
|
if ($width > $max && $height > $max) {
|
|
// very tall image (greater than 16:9)
|
|
// constrain the width - let the height float.
|
|
|
|
if ((($height * 9) / 16) > $width) {
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} elseif ($width > $height) {
|
|
// else constrain both dimensions
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} else {
|
|
$dest_width = intval(($width * $max) / $height);
|
|
$dest_height = $max;
|
|
}
|
|
} else {
|
|
if ($width > $max) {
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} else {
|
|
if ($height > $max) {
|
|
// very tall image (greater than 16:9)
|
|
// but width is OK - don't do anything
|
|
|
|
if ((($height * 9) / 16) > $width) {
|
|
$dest_width = $width;
|
|
$dest_height = $height;
|
|
} else {
|
|
$dest_width = intval(($width * $max) / $height);
|
|
$dest_height = $max;
|
|
}
|
|
} else {
|
|
$dest_width = $width;
|
|
$dest_height = $height;
|
|
}
|
|
}
|
|
}
|
|
return ["width" => $dest_width, "height" => $dest_height];
|
|
}
|
|
}
|