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<?php |
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namespace WebPConvert\Convert\BaseConverters\BaseTraits; |
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use WebPConvert\Helpers\JpegQualityDetector; |
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trait AutoQualityTrait |
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{ |
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private $processed = false; |
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private $qualityCouldNotBeDetected = false; |
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private $calculatedQuality; |
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abstract public function getMimeTypeOfSource(); |
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/** |
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* Determine if quality detection is required but failing. |
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* |
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* It is considered "required" when: |
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* - Mime type is "image/jpeg" |
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* - Quality is set to "auto" |
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* |
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* @return boolean |
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*/ |
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public function isQualityDetectionRequiredButFailing() |
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{ |
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$this->processQualityOptionIfNotAlready(); |
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return $this->qualityCouldNotBeDetected; |
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} |
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/** |
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* Get calculated quality. |
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* |
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* If mime type is something else than "image/jpeg", the "default-quality" option is returned |
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* Same thing for jpeg, when the "quality" option is set to a number (rather than "auto"). |
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* |
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* Otherwise: |
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* If quality cannot be detetected, the "default-quality" option is returned. |
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* If quality can be detetected, the lowest value of this and the "max-quality" option is returned |
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* |
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* @return int |
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*/ |
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public function getCalculatedQuality() |
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{ |
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$this->processQualityOptionIfNotAlready(); |
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return $this->calculatedQuality; |
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} |
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/** |
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* @return void |
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*/ |
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private function processQualityOptionIfNotAlready() |
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{ |
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if (!$this->processed) { |
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$this->processed = true; |
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$this->processQualityOption(); |
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} |
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} |
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/** |
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* @return void |
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*/ |
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private function processQualityOption() |
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{ |
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$options = $this->options; |
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$logger = $this->logger; |
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$source = $this->source; |
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$q = $options['quality']; |
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if ($q == 'auto') { |
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if (($this->getMimeTypeOfSource() == 'image/jpeg')) { |
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$q = JpegQualityDetector::detectQualityOfJpg($source); |
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if (is_null($q)) { |
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$q = $options['default-quality']; |
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$logger->logLn( |
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'Quality of source could not be established (Imagick or GraphicsMagick is required)' . |
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' - Using default instead (' . $options['default-quality'] . ').' |
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); |
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$this->qualityCouldNotBeDetected = true; |
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} else { |
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if ($q > $options['max-quality']) { |
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$logger->logLn( |
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'Quality of source is ' . $q . '. ' . |
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'This is higher than max-quality, so using max-quality instead (' . |
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$options['max-quality'] . ')' |
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); |
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} else { |
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$logger->logLn('Quality set to same as source: ' . $q); |
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} |
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} |
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$q = min($q, $options['max-quality']); |
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} else { |
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$q = $options['default-quality']; |
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$logger->logLn('Quality: ' . $q . '. '); |
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} |
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} else { |
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$logger->logLn( |
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'Quality: ' . $q . '. ' . |
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'Consider setting quality to "auto" instead. It is generally a better idea' |
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); |
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} |
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$this->calculatedQuality = $q; |
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} |
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} |
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rosell-dk /
webp-convert
