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<?php |
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namespace WebPConvert\Convert\Converters; |
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use WebPConvert\Convert\Converters\AbstractConverter; |
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use WebPConvert\Convert\Exceptions\ConversionFailedException; |
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use WebPConvert\Convert\Exceptions\ConversionFailed\FileSystemProblems\CreateDestinationFileException; |
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use WebPConvert\Convert\Exceptions\ConversionFailed\ConverterNotOperational\SystemRequirementsNotMetException; |
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//use WebPConvert\Convert\Exceptions\ConversionFailed\InvalidInput\TargetNotFoundException; |
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/** |
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* Convert images to webp using Imagick extension. |
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* |
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* @package WebPConvert |
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* @author Bjørn Rosell <[email protected]> |
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* @since Class available since Release 2.0.0 |
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*/ |
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class Imagick extends AbstractConverter |
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{ |
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public function supportsLossless() |
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{ |
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return false; |
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} |
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/** |
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* Check operationality of Imagick converter. |
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* |
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* Note: |
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* It may be that Gd has been compiled without jpeg support or png support. |
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* We do not check for this here, as the converter could still be used for the other. |
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* |
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* @throws SystemRequirementsNotMetException if system requirements are not met |
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* @return void |
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*/ |
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public function checkOperationality() |
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{ |
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if (!extension_loaded('imagick')) { |
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throw new SystemRequirementsNotMetException('Required iMagick extension is not available.'); |
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} |
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if (!class_exists('\\Imagick')) { |
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throw new SystemRequirementsNotMetException( |
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'iMagick is installed, but not correctly. The class Imagick is not available' |
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); |
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} |
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$im = new \Imagick(); |
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if (!in_array('WEBP', $im->queryFormats('WEBP'))) { |
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throw new SystemRequirementsNotMetException('iMagick was compiled without WebP support.'); |
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} |
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} |
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/** |
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* Check if specific file is convertable with current converter / converter settings. |
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* |
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* @throws SystemRequirementsNotMetException if Imagick does not support image type |
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*/ |
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public function checkConvertability() |
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{ |
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$im = new \Imagick(); |
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$mimeType = $this->getMimeTypeOfSource(); |
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switch ($mimeType) { |
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case 'image/png': |
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if (!in_array('PNG', $im->queryFormats('PNG'))) { |
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throw new SystemRequirementsNotMetException( |
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'Imagick has been compiled without PNG support and can therefore not convert this PNG image.' |
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); |
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} |
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break; |
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case 'image/jpeg': |
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if (!in_array('JPEG', $im->queryFormats('JPEG'))) { |
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throw new SystemRequirementsNotMetException( |
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'Imagick has been compiled without Jpeg support and can therefore not convert this Jpeg image.' |
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); |
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} |
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break; |
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} |
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} |
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/** |
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* |
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* It may also throw an ImagickException if imagick throws an exception |
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* @throws CreateDestinationFileException if imageblob could not be saved to file |
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*/ |
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protected function doActualConvert() |
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{ |
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$options = $this->options; |
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// This might throw - we let it! |
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$im = new \Imagick($this->source); |
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//$im = new \Imagick(); |
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//$im->readImage($this->source); |
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$im->setImageFormat('WEBP'); |
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/* |
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* More about iMagick's WebP options: |
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* http://www.imagemagick.org/script/webp.php |
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* https://developers.google.com/speed/webp/docs/cwebp |
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* https://stackoverflow.com/questions/37711492/imagemagick-specific-webp-calls-in-php |
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*/ |
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// TODO: We could easily support all webp options with a loop |
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/* |
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After using getImageBlob() to write image, the following setOption() calls |
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makes settings makes imagick fail. So can't use those. But its a small price |
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to get a converter that actually makes great quality conversions. |
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$im->setOption('webp:method', strval($options['method'])); |
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$im->setOption('webp:low-memory', strval($options['low-memory'])); |
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$im->setOption('webp:lossless', strval($options['lossless'])); |
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*/ |
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if ($options['metadata'] == 'none') { |
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// Strip metadata and profiles |
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$im->stripImage(); |
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} |
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if ($this->isQualityDetectionRequiredButFailing()) { |
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// Luckily imagick is a big boy, and automatically converts with same quality as |
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// source, when the quality isn't set. |
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// So we simply do not set quality. |
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// This actually kills the max-quality functionality. But I deem that this is more important |
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// because setting image quality to something higher than source generates bigger files, |
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// but gets you no extra quality. When failing to limit quality, you at least get something |
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// out of it |
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$this->logLn('Converting without setting quality in order to achieve auto quality'); |
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} else { |
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$im->setImageCompressionQuality($this->getCalculatedQuality()); |
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} |
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// https://stackoverflow.com/questions/29171248/php-imagick-jpeg-optimization |
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// setImageFormat |
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// TODO: Read up on |
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// https://www.smashingmagazine.com/2015/06/efficient-image-resizing-with-imagemagick/ |
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// https://github.com/nwtn/php-respimg |
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// TODO: |
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// Should we set alpha channel for PNG's like suggested here: |
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// https://gauntface.com/blog/2014/09/02/webp-support-with-imagemagick-and-php ?? |
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// It seems that alpha channel works without... (at least I see completely transparerent pixels) |
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// TODO: Check out other iMagick methods, see http://php.net/manual/de/imagick.writeimage.php#114714 |
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// 1. file_put_contents($destination, $im) |
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// 2. $im->writeImage($destination) |
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// We used to use writeImageFile() method. But we now use getImageBlob(). See issue #43 |
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//$success = $im->writeImageFile(fopen($destination, 'wb')); |
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// This might throw - we let it! |
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$imageBlob = $im->getImageBlob(); |
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$success = file_put_contents($this->destination, $imageBlob); |
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if (!$success) { |
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throw new CreateDestinationFileException('Failed writing file'); |
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} |
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// Btw: check out processWebp() method here: |
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// https://github.com/Intervention/image/blob/master/src/Intervention/Image/Imagick/Encoder.php |
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} |
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} |
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rosell-dk /
webp-convert
