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<?php |
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namespace WebPConvert\Convert\Converters; |
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use WebPConvert\Convert\BaseConverters\AbstractConverter; |
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use WebPConvert\Convert\Exceptions\ConversionFailedException; |
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use WebPConvert\Convert\Exceptions\ConversionFailed\ConverterNotOperational\SystemRequirementsNotMetException; |
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class Vips extends AbstractConverter |
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{ |
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protected function getOptionDefinitionsExtra() |
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{ |
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return []; |
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} |
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/** |
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* Check operationality of Vips converter. |
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* |
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* @throws SystemRequirementsNotMetException if system requirements are not met |
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*/ |
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protected function checkOperationality() |
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{ |
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if (!extension_loaded('vips')) { |
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throw new SystemRequirementsNotMetException('Required Vips extension is not available.'); |
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} |
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if (!function_exists('vips_image_new_from_file')) { |
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throw new SystemRequirementsNotMetException( |
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'Vips extension seems to be installed, however something is not right: ' . |
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'the function "vips_image_new_from_file" is not available.' |
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); |
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} |
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// TODO: Should we also test if webp is available? (It seems not to be neccessary - it seems |
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// that webp be well intergrated part of vips) |
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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 Vips does not support image type |
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*/ |
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protected function checkConvertability() |
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{ |
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// It seems that png and jpeg are always supported by Vips |
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// - so nothing needs to be done here |
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} |
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protected function doActualConvert() |
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{ |
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/* |
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$im = \Jcupitt\Vips\Image::newFromFile(__DIR__ . '/images/small.jpg'); |
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//$im->writeToFile(__DIR__ . '/images/small-vips.webp', ["Q" => 10]); |
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$im->webpsave(__DIR__ . '/images/small-vips.webp', [ |
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"Q" => 80, |
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'near_lossless' => true |
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]); |
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return; |
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*/ |
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if (function_exists('vips_version')) { |
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$this->logLn('vips version: ' . vips_version()); |
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} |
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// We are currently using vips_image_new_from_file(), but we could consider |
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// calling vips_jpegload / vips_pngload instead |
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$result = vips_image_new_from_file($this->source, []); |
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if ($result === -1) { |
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/*throw new ConversionFailedException( |
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'Failed creating new vips image from file: ' . $this->source |
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);*/ |
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$message = vips_error_buffer(); |
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throw new ConversionFailedException($message); |
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} |
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if (!is_array($result)) { |
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throw new ConversionFailedException( |
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'vips_image_new_from_file did not return an array, which we expected' |
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); |
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} |
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if (count($result) != 1) { |
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throw new ConversionFailedException( |
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'vips_image_new_from_file did not return an array of length 1 as we expected ' . |
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'- length was: ' . count($result) |
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); |
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} |
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$im = array_shift($result); |
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// for some reason, vips_webpsave function is unavailable on at least one system, so we |
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// use vips_call instead. |
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// webpsave options are described here: |
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// https://jcupitt.github.io/libvips/API/current/VipsForeignSave.html#vips-webpsave |
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$result = vips_call('webpsave', $im, $this->destination, [ |
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"Q" => $this->getCalculatedQuality(), |
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//'lossless' => true, |
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//'lossless' => $this->options['lossless'], // boolean |
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//'preset' |
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//'smart_subsample' // boolean |
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// hm, when I use near_lossless, I get error: "no property named `near_lossless'" |
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// btw: beware that if this is used, q must be 20, 40, 60 or 80 (according to link above) |
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//'near_lossless' => true, // boolean |
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//'alpha_q' // int |
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'strip' => $this->options['metadata'] == 'none' |
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]); |
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if ($result === -1) { |
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$message = vips_error_buffer(); |
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throw new ConversionFailedException($message); |
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} |
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} |
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} |
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rosell-dk /
webp-convert
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