370 lines
15 KiB
PHP
370 lines
15 KiB
PHP
<?php
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/*************************************************************************************/
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/* This file is part of the Thelia package. */
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/* */
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/* Copyright (c) OpenStudio */
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/* email : dev@thelia.net */
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/* web : http://www.thelia.net */
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/* */
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/* For the full copyright and license information, please view the LICENSE.txt */
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/* file that was distributed with this source code. */
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/*************************************************************************************/
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namespace Thelia\Action;
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use Imagine\Image\Box;
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use Imagine\Image\Color;
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use Imagine\Image\ImageInterface;
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use Imagine\Image\ImagineInterface;
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use Imagine\Image\Point;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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use Thelia\Core\Event\Image\ImageEvent;
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use Thelia\Core\Event\TheliaEvents;
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use Thelia\Exception\ImageException;
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use Thelia\Model\ConfigQuery;
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use Thelia\Tools\URL;
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/**
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*
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* Image management actions. This class handles image processing and caching.
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*
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* Basically, images are stored outside of the web space (by default in local/media/images),
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* and cached inside the web space (by default in web/local/images).
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*
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* In the images caches directory, a subdirectory for images categories (eg. product, category, folder, etc.) is
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* automatically created, and the cached image is created here. Plugin may use their own subdirectory as required.
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*
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* The cached image name contains a hash of the processing options, and the original (normalized) name of the image.
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*
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* A copy (or symbolic link, by default) of the original image is always created in the cache, so that the full
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* resolution image is always available.
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*
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* Various image processing options are available :
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*
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* - resizing, with border, crop, or by keeping image aspect ratio
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* - rotation, in degrees, positive or negative
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* - background color, applyed to empty background when creating borders or rotating
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* - effects. The effects are applied in the specified order. The following effects are available:
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* - gamma:value : change the image Gamma to the specified value. Example: gamma:0.7
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* - grayscale or greyscale: switch image to grayscale
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* - colorize:color : apply a color mask to the image. Exemple: colorize:#ff2244
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* - negative : transform the image in its negative equivalent
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* - vflip or vertical_flip : vertical flip
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* - hflip or horizontal_flip : horizontal flip
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*
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* If a problem occurs, an ImageException may be thrown.
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*
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* @package Thelia\Action
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* @author Franck Allimant <franck@cqfdev.fr>
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*
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*/
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class Image extends BaseCachedFile implements EventSubscriberInterface
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{
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// Resize mode constants
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const EXACT_RATIO_WITH_BORDERS = 1;
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const EXACT_RATIO_WITH_CROP = 2;
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const KEEP_IMAGE_RATIO = 3;
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/**
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* @return string root of the image cache directory in web space
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*/
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protected function getCacheDirFromWebRoot()
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{
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return ConfigQuery::read('image_cache_dir_from_web_root', 'cache');
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}
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/**
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* Process image and write the result in the image cache.
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*
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* If the image already exists in cache, the cache file is immediately returned, without any processing
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* If the original (full resolution) image is required, create either a symbolic link with the
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* original image in the cache dir, or copy it in the cache dir.
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*
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* This method updates the cache_file_path and file_url attributes of the event
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*
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* @param ImageEvent $event
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*
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* @throws \Thelia\Exception\ImageException
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* @throws \InvalidArgumentException
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*/
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public function processImage(ImageEvent $event)
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{
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$subdir = $event->getCacheSubdirectory();
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$source_file = $event->getSourceFilepath();
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if (null == $subdir || null == $source_file) {
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throw new \InvalidArgumentException("Cache sub-directory and source file path cannot be null");
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}
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// Find cached file path
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$cacheFilePath = $this->getCacheFilePath($subdir, $source_file, $event->isOriginalImage(), $event->getOptionsHash());
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$originalImagePathInCache = $this->getCacheFilePath($subdir, $source_file, true);
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if (! file_exists($cacheFilePath)) {
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if (! file_exists($source_file)) {
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throw new ImageException(sprintf("Source image file %s does not exists.", $source_file));
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}
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// Create a chached version of the original image in the web space, if not exists
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if (! file_exists($originalImagePathInCache)) {
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$mode = ConfigQuery::read('original_image_delivery_mode', 'symlink');
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if ($mode == 'symlink') {
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if (false == symlink($source_file, $originalImagePathInCache)) {
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throw new ImageException(sprintf("Failed to create symbolic link for %s in %s image cache directory", basename($source_file), $subdir));
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}
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} else {// mode = 'copy'
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if (false == @copy($source_file, $originalImagePathInCache)) {
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throw new ImageException(sprintf("Failed to copy %s in %s image cache directory", basename($source_file), $subdir));
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}
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}
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}
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// Process image only if we have some transformations to do.
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if (! $event->isOriginalImage()) {
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// We have to process the image.
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$imagine = $this->createImagineInstance();
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$image = $imagine->open($source_file);
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if ($image) {
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// Allow image pre-processing (watermarging, or other stuff...)
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$event->setImageObject($image);
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$event->getDispatcher()->dispatch(TheliaEvents::IMAGE_PREPROCESSING, $event);
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$image = $event->getImageObject();
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$background_color = $event->getBackgroundColor();
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if ($background_color != null) {
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$bg_color = new Color($background_color);
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} else
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$bg_color = null;
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// Apply resize
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$image = $this->applyResize($imagine, $image, $event->getWidth(), $event->getHeight(), $event->getResizeMode(), $bg_color);
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// Rotate if required
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$rotation = intval($event->getRotation());
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if ($rotation != 0)
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$image->rotate($rotation, $bg_color);
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// Flip
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// Process each effects
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foreach ($event->getEffects() as $effect) {
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$effect = trim(strtolower($effect));
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$params = explode(':', $effect);
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switch ($params[0]) {
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case 'greyscale':
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case 'grayscale':
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$image->effects()->grayscale();
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break;
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case 'negative':
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$image->effects()->negative();
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break;
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case 'horizontal_flip':
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case 'hflip':
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$image->flipHorizontally();
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break;
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case 'vertical_flip':
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case 'vflip':
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$image-> flipVertically();
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break;
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case 'gamma':
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// Syntax: gamma:value. Exemple: gamma:0.7
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if (isset($params[1])) {
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$gamma = floatval($params[1]);
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$image->effects()->gamma($gamma);
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}
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break;
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case 'colorize':
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// Syntax: colorize:couleur. Exemple: colorize:#ff00cc
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if (isset($params[1])) {
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$the_color = new Color($params[1]);
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$image->effects()->colorize($the_color);
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}
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break;
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}
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}
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$quality = $event->getQuality();
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if (is_null($quality)) $quality = ConfigQuery::read('default_image_quality_percent', 75);
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// Allow image post-processing (watermarging, or other stuff...)
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$event->setImageObject($image);
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$event->getDispatcher()->dispatch(TheliaEvents::IMAGE_POSTPROCESSING, $event);
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$image = $event->getImageObject();
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$image->save(
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$cacheFilePath,
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array('quality' => $quality)
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);
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} else {
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throw new ImageException(sprintf("Source file %s cannot be opened.", basename($source_file)));
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}
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}
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}
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// Compute the image URL
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$processed_image_url = $this->getCacheFileURL($subdir, basename($cacheFilePath));
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// compute the full resolution image path in cache
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$original_image_url = $this->getCacheFileURL($subdir, basename($originalImagePathInCache));
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// Update the event with file path and file URL
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$event->setCacheFilepath($cacheFilePath);
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$event->setCacheOriginalFilepath($originalImagePathInCache);
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$event->setFileUrl(URL::getInstance()->absoluteUrl($processed_image_url, null, URL::PATH_TO_FILE));
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$event->setOriginalFileUrl(URL::getInstance()->absoluteUrl($original_image_url, null, URL::PATH_TO_FILE));
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}
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/**
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* Process image resizing, with borders or cropping. If $dest_width and $dest_height
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* are both null, no resize is performed.
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*
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* @param ImagineInterface $imagine the Imagine instance
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* @param ImageInterface $image the image to process
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* @param int $dest_width the required width
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* @param int $dest_height the required height
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* @param int $resize_mode the resize mode (crop / bands / keep image ratio)p
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* @param string $bg_color the bg_color used for bands
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* @return ImageInterface the resized image.
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*/
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protected function applyResize(ImagineInterface $imagine, ImageInterface $image, $dest_width, $dest_height, $resize_mode, $bg_color)
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{
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if (! (is_null($dest_width) && is_null($dest_height))) {
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$width_orig = $image->getSize()->getWidth();
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$height_orig = $image->getSize()->getHeight();
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if (is_null($dest_width))
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$dest_width = $width_orig;
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if (is_null($dest_height))
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$dest_height = $height_orig;
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if (is_null($resize_mode))
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$resize_mode = self::KEEP_IMAGE_RATIO;
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$width_diff = $dest_width / $width_orig;
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$height_diff = $dest_height / $height_orig;
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$delta_x = $delta_y = $border_width = $border_height = 0;
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if ($width_diff > 1 && $height_diff > 1) {
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$next_width = $width_orig;
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$next_height = $height_orig;
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$dest_width = ($resize_mode == self::EXACT_RATIO_WITH_BORDERS ? $dest_width : $next_width);
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$dest_height = ($resize_mode == self::EXACT_RATIO_WITH_BORDERS ? $dest_height : $next_height);
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} elseif ($width_diff > $height_diff) {
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// Image height > image width
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$next_height = $dest_height;
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$next_width = intval(($width_orig * $next_height) / $height_orig);
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if ($resize_mode == self::EXACT_RATIO_WITH_CROP) {
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$next_width = $dest_width;
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$next_height = intval($height_orig * $dest_width / $width_orig);
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$delta_y = ($next_height - $dest_height) / 2;
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} elseif ($resize_mode != self::EXACT_RATIO_WITH_BORDERS) {
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$dest_width = $next_width;
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}
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} else {
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// Image width > image height
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$next_width = $dest_width;
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$next_height = intval($height_orig * $dest_width / $width_orig);
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if ($resize_mode == self::EXACT_RATIO_WITH_CROP) {
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$next_height = $dest_height;
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$next_width = intval(($width_orig * $next_height) / $height_orig);
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$delta_x = ($next_width - $dest_width) / 2;
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} elseif ($resize_mode != self::EXACT_RATIO_WITH_BORDERS) {
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$dest_height = $next_height;
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}
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}
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$image->resize(new Box($next_width, $next_height));
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if ($resize_mode == self::EXACT_RATIO_WITH_BORDERS) {
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$border_width = intval(($dest_width - $next_width) / 2);
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$border_height = intval(($dest_height - $next_height) / 2);
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$canvas = new Box($dest_width, $dest_height);
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return $imagine->create($canvas, $bg_color)
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->paste($image, new Point($border_width, $border_height));
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} elseif ($resize_mode == self::EXACT_RATIO_WITH_CROP) {
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$image->crop(
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new Point($delta_x, $delta_y),
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new Box($dest_width, $dest_height)
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);
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}
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}
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return $image;
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}
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/**
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* Create a new Imagine object using current driver configuration
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*
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* @return ImagineInterface
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*/
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protected function createImagineInstance()
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{
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$driver = ConfigQuery::read("imagine_graphic_driver", "gd");
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switch ($driver) {
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case 'imagik':
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$image = new \Imagine\Imagick\Imagine();
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break;
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case 'gmagick':
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$image = new \Imagine\Gmagick\Imagine();
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break;
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case 'gd':
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default:
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$image = new \Imagine\Gd\Imagine();
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}
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return $image;
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}
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public static function getSubscribedEvents()
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{
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return array(
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TheliaEvents::IMAGE_PROCESS => array("processImage", 128),
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// Implemented in parent class BaseCachedFile
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TheliaEvents::IMAGE_CLEAR_CACHE => array("clearCache", 128),
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TheliaEvents::IMAGE_DELETE => array("deleteFile", 128),
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TheliaEvents::IMAGE_SAVE => array("saveFile", 128),
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TheliaEvents::IMAGE_UPDATE => array("updateFile", 128),
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TheliaEvents::IMAGE_UPDATE_POSITION => array("updatePosition", 128),
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);
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}
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}
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