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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\Converters\ConverterTraits\EncodingAutoTrait; |
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use WebPConvert\Convert\Converters\ConverterTraits\ExecTrait; |
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use WebPConvert\Convert\Exceptions\ConversionFailed\ConverterNotOperational\SystemRequirementsNotMetException; |
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use WebPConvert\Convert\Exceptions\ConversionFailedException; |
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//use WebPConvert\Convert\Exceptions\ConversionFailed\InvalidInput\TargetNotFoundException; |
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/** |
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* Convert images to webp by calling gmagick binary (gm). |
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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 GmagickBinary extends AbstractConverter |
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{ |
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use ExecTrait; |
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use EncodingAutoTrait; |
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protected function getUnsupportedDefaultOptions() |
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{ |
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return [ |
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'auto-filter', |
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'near-lossless', |
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'preset', |
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'size-in-percentage', |
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]; |
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} |
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private static function getGmagickPath() |
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{ |
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if (empty(getenv('GMAGICK_PATH'))) { |
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return 'gm'; |
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} else { |
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return getenv('GMAGICK_PATH') . '/gm'; |
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} |
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} |
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public static function gmagickInstalled() |
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{ |
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exec(self::getGmagickPath() . ' -version', $output, $returnCode); |
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return ($returnCode == 0); |
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} |
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public static function gmagickVersion() |
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{ |
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exec(self::getGmagickPath() . ' -version', $output, $returnCode); |
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if (($returnCode == 0) && isset($output[0])) { |
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return preg_replace('#http.*#', '', $output[0]); |
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} |
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return 'unknown'; |
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} |
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// Check if webp delegate is installed |
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public static function webPDelegateInstalled() |
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{ |
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exec(self::getGmagickPath() . ' -version', $output, $returnCode); |
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foreach ($output as $line) { |
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if (preg_match('#WebP.*yes#i', $line)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Check (general) operationality of imagack converter executable |
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* |
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* @throws SystemRequirementsNotMetException if system requirements are not met |
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*/ |
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public function checkOperationality() |
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{ |
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$this->checkOperationalityExecTrait(); |
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if (!self::gmagickInstalled()) { |
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throw new SystemRequirementsNotMetException('gmagick is not installed'); |
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} |
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if (!self::webPDelegateInstalled()) { |
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throw new SystemRequirementsNotMetException('webp delegate missing'); |
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} |
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} |
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/** |
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* Build command line options |
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* |
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* @return string |
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*/ |
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private function createCommandLineOptions() |
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{ |
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$commandArguments = []; |
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// Unlike imagick binary, it seems gmagick binary uses a fixed |
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// quality (75) when quality is omitted |
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// $commandArguments[] = '-quality ' . escapeshellarg($this->getCalculatedQuality()); |
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// encoding |
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if ($this->options['encoding'] == 'lossless') { |
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// Btw: |
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// I am not sure if we should set "quality" for lossless. |
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// Quality should not apply to lossless, but my tests shows that it does in some way for gmagick |
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// setting it low, you get bad visual quality and small filesize. Setting it high, you get the opposite |
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// Some claim it is a bad idea to set quality, but I'm not so sure. |
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// https://stackoverflow.com/questions/4228027/ |
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// First, I do not just get bigger images when setting quality, as toc777 does. |
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// Secondly, the answer is very old and that bad behaviour is probably fixed by now. |
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$commandArguments[] = '-define webp:lossless=true'; |
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} else { |
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$commandArguments[] = '-define webp:lossless=false'; |
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} |
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if ($this->options['alpha-quality'] !== 100) { |
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$commandArguments[] = '-define webp:alpha-quality=' . strval($this->options['alpha-quality']); |
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} |
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if ($this->options['low-memory']) { |
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$commandArguments[] = '-define webp:low-memory=true'; |
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} |
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if ($this->options['metadata'] == 'none') { |
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$commandArguments[] = '-strip'; |
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} |
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$commandArguments[] = '-define webp:method=' . $this->options['method']; |
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$commandArguments[] = escapeshellarg($this->source); |
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$commandArguments[] = escapeshellarg('webp:' . $this->destination); |
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return implode(' ', $commandArguments); |
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} |
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protected function doActualConvert() |
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{ |
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//$this->logLn('Using quality:' . $this->getCalculatedQuality()); |
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$this->logLn('Version: ' . self::gmagickVersion()); |
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$command = self::getGmagickPath() . ' convert ' . $this->createCommandLineOptions(); |
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$useNice = (($this->options['use-nice']) && self::hasNiceSupport()) ? true : false; |
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if ($useNice) { |
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$this->logLn('using nice'); |
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$command = 'nice ' . $command; |
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} |
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$this->logLn('command: ' . $command); |
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exec($command, $output, $returnCode); |
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if ($returnCode == 127) { |
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throw new SystemRequirementsNotMetException('gmagick is not installed'); |
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} |
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if ($returnCode != 0) { |
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$this->logLn('command:' . $command); |
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$this->logLn('return code:' . $returnCode); |
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$this->logLn('output:' . print_r(implode("\n", $output), true)); |
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throw new SystemRequirementsNotMetException('The exec call failed'); |
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} |
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} |
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} |
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rosell-dk /
webp-convert
