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<?php |
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//namespace WebPConvert\Convert\Converters\BaseTraits; |
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namespace WebPConvert\Convert\Converters\ConverterTraits; |
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/** |
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* Trait for converters that supports lossless encoding and thus the "lossless:auto" option. |
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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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trait EncodingAutoTrait |
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{ |
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abstract protected function doActualConvert(); |
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abstract public function getSource(); |
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abstract public function getDestination(); |
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abstract public function setDestination($destination); |
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abstract public function getOptions(); |
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abstract protected function setOption($optionName, $optionValue); |
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abstract protected function logLn($msg, $style = ''); |
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abstract protected function ln(); |
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public function supportsLossless() |
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{ |
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return true; |
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} |
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/** Default is to not pass "lossless:auto" on, but implement it. |
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* |
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* The Stack converter passes it on (it does not even use this trait) |
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* WPC currently implements it, but this might be configurable in the future. |
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* |
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*/ |
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public function passOnEncodingAuto() |
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{ |
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return false; |
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} |
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private function convertTwoAndSelectSmallest() |
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{ |
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$destination = $this->getDestination(); |
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$destinationLossless = $destination . '.lossless.webp'; |
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$destinationLossy = $destination . '.lossy.webp'; |
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$this->logLn( |
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'Encoding is set to auto - converting to both lossless and lossy and selecting the smallest file' |
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); |
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$this->ln(); |
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$this->logLn('Converting to lossy'); |
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$this->setDestination($destinationLossy); |
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$this->setOption('encoding', 'lossy'); |
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$this->doActualConvert(); |
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$this->logLn('Reduction: ' . |
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round( |
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(filesize($this->getSource()) - filesize($destinationLossy))/filesize($this->getSource()) * 100 |
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) . '% '); |
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$this->ln(); |
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$this->logLn('Converting to lossless'); |
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$this->setDestination($destinationLossless); |
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$this->setOption('encoding', 'lossless'); |
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$this->doActualConvert(); |
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$this->logLn('Reduction: ' . |
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round( |
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(filesize($this->getSource()) - filesize($destinationLossless))/filesize($this->getSource()) * 100 |
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) . '% '); |
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$this->ln(); |
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if (filesize($destinationLossless) > filesize($destinationLossy)) { |
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$this->logLn('Picking lossy'); |
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unlink($destinationLossless); |
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rename($destinationLossy, $destination); |
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} else { |
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$this->logLn('Picking lossless'); |
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unlink($destinationLossy); |
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rename($destinationLossless, $destination); |
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} |
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$this->setDestination($destination); |
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$this->setOption('encoding', 'auto'); |
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} |
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protected function runActualConvert() |
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{ |
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if (!$this->passOnEncodingAuto() && ($this->getOptions()['encoding'] == 'auto') && $this->supportsLossless()) { |
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$this->convertTwoAndSelectSmallest(); |
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} else { |
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$this->doActualConvert(); |
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} |
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} |
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} |
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rosell-dk /
webp-convert
