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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\ExecTrait; |
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use WebPConvert\Convert\Converters\ConverterTraits\EncodingAutoTrait; |
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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 imagick binary. |
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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 ImageMagick 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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'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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// To futher improve this converter, I could check out: |
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// https://github.com/Orbitale/ImageMagickPHP |
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public static function imagickInstalled() |
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{ |
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exec('convert -version', $output, $returnCode); |
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return ($returnCode == 0); |
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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('convert -list delegate', $output, $returnCode); |
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foreach ($output as $line) { |
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if (preg_match('#webp\\s*=#i', $line)) { |
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return true; |
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} |
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} |
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// try other command |
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exec('convert -list configure', $output, $returnCode); |
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foreach ($output as $line) { |
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if (preg_match('#DELEGATE.*webp#i', $line)) { |
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return true; |
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} |
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} |
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return false; |
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// PS, convert -version does not output delegates on travis, so it is not reliable |
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} |
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/** |
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* Check (general) operationality of imagack converter executable |
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* |
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* @throws SystemRequirementsNotMetException if system requirements are not met |
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*/ |
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public function checkOperationality() |
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{ |
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$this->checkOperationalityExecTrait(); |
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if (!self::imagickInstalled()) { |
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throw new SystemRequirementsNotMetException('imagick 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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// PS: Available webp options for imagick are documented here: |
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// https://imagemagick.org/script/webp.php |
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$commandArguments = []; |
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if ($this->isQualityDetectionRequiredButFailing()) { |
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// quality:auto was specified, but could not be determined. |
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// we cannot apply the max-quality logic, but we can provide auto quality |
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// simply by not specifying the quality option. |
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} else { |
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$commandArguments[] = '-quality ' . escapeshellarg($this->getCalculatedQuality()); |
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} |
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if ($this->options['encoding'] == 'lossless') { |
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$commandArguments[] = '-define webp:lossless=true'; |
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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 ($this->options['auto-filter'] === true) { |
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$commandArguments[] = '-define webp:auto-filter=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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if ($this->options['alpha-quality'] !== 100) { |
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$commandArguments[] = '-define webp:alpha-quality=' . strval($this->options['alpha-quality']); |
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} |
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// Unfortunately, near-lossless does not seem to be supported. |
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// it does have a "preprocessing" option, which may be doing something similar |
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$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:' . $this->getCalculatedQuality()); |
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// Should we use "magick" or "convert" command? |
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// It seems they do the same. But which is best supported? Which is mostly available (whitelisted)? |
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// Should we perhaps try both? |
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// For now, we just go with "convert" |
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$command = 'convert ' . $this->createCommandLineOptions(); |
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// also try common system paths?, or perhaps allow path to be set in environment? |
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//$command = '/home/rosell/opt/bin/magick ' . implode(' ', $commandArguments); |
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$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('imagick 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
