File "Imagick.php"
Full Path: /var/www/html/wordpress/wp-content/plugins/wp-optimize/vendor/rosell-dk/webp-convert/src/Convert/Converters/Imagick.php
File size: 9.07 KB
MIME-type: text/x-php
Charset: utf-8
<?php
namespace WebPConvert\Convert\Converters;
use WebPConvert\Convert\Converters\AbstractConverter;
use WebPConvert\Convert\Exceptions\ConversionFailedException;
use WebPConvert\Convert\Exceptions\ConversionFailed\FileSystemProblems\CreateDestinationFileException;
use WebPConvert\Convert\Exceptions\ConversionFailed\ConverterNotOperational\SystemRequirementsNotMetException;
use WebPConvert\Convert\Converters\ConverterTraits\EncodingAutoTrait;
//use WebPConvert\Convert\Exceptions\ConversionFailed\InvalidInput\TargetNotFoundException;
/**
* Convert images to webp using Imagick extension.
*
* @package WebPConvert
* @author Bjørn Rosell <[email protected]>
* @since Class available since Release 2.0.0
*/
class Imagick extends AbstractConverter
{
use EncodingAutoTrait;
protected function getUnsupportedDefaultOptions()
{
return [
'size-in-percentage',
];
}
/**
* Check operationality of Imagick converter.
*
* Note:
* It may be that Gd has been compiled without jpeg support or png support.
* We do not check for this here, as the converter could still be used for the other.
*
* @throws SystemRequirementsNotMetException if system requirements are not met
* @return void
*/
public function checkOperationality()
{
if (!extension_loaded('imagick')) {
throw new SystemRequirementsNotMetException('Required iMagick extension is not available.');
}
if (!class_exists('\\Imagick')) {
throw new SystemRequirementsNotMetException(
'iMagick is installed, but not correctly. The class Imagick is not available'
);
}
$im = new \Imagick();
if (!in_array('WEBP', $im->queryFormats('WEBP'))) {
throw new SystemRequirementsNotMetException('iMagick was compiled without WebP support.');
}
}
/**
* Check if specific file is convertable with current converter / converter settings.
*
* @throws SystemRequirementsNotMetException if Imagick does not support image type
*/
public function checkConvertability()
{
$im = new \Imagick();
$mimeType = $this->getMimeTypeOfSource();
switch ($mimeType) {
case 'image/png':
if (!in_array('PNG', $im->queryFormats('PNG'))) {
throw new SystemRequirementsNotMetException(
'Imagick has been compiled without PNG support and can therefore not convert this PNG image.'
);
}
break;
case 'image/jpeg':
if (!in_array('JPEG', $im->queryFormats('JPEG'))) {
throw new SystemRequirementsNotMetException(
'Imagick has been compiled without Jpeg support and can therefore not convert this Jpeg image.'
);
}
break;
}
}
/**
*
* It may also throw an ImagickException if imagick throws an exception
* @throws CreateDestinationFileException if imageblob could not be saved to file
*/
protected function doActualConvert()
{
/*
* More about iMagick's WebP options:
* - Inspect source code: https://github.com/ImageMagick/ImageMagick/blob/master/coders/webp.c#L559
* (search for "webp:")
* - http://www.imagemagick.org/script/webp.php
* - https://developers.google.com/speed/webp/docs/cwebp
* - https://stackoverflow.com/questions/37711492/imagemagick-specific-webp-calls-in-php
*/
$options = $this->options;
// This might throw - we let it!
$im = new \Imagick($this->source);
//$im = new \Imagick();
//$im->pingImage($this->source);
//$im->readImage($this->source);
$version = \Imagick::getVersion();
$this->logLn('ImageMagic API version (full): ' . $version['versionString']);
preg_match('#\d+\.\d+\.\d+[\d\.\-]+#', $version['versionString'], $matches);
$versionNumber = (isset($matches[0]) ? $matches[0] : 'unknown');
$this->logLn('ImageMagic API version (just the number): ' . $versionNumber);
// Note: good enough for info, but not entirely reliable - see #304
$extVersion = (defined('\Imagick::IMAGICK_EXTVER') ? \Imagick::IMAGICK_EXTVER : phpversion('imagick'));
$this->logLn('Imagic extension version: ' . $extVersion);
$im->setImageFormat('WEBP');
if (!is_null($options['preset'])) {
if ($options['preset'] != 'none') {
$imageHint = $options['preset'];
switch ($imageHint) {
case 'drawing':
case 'icon':
case 'text':
$imageHint = 'graph';
$this->logLn(
'The "preset" value was mapped to "graph" because imagick does not support "drawing",' .
' "icon" and "text", but grouped these into one option: "graph".'
);
}
$im->setOption('webp:image-hint', $imageHint);
}
}
$im->setOption('webp:method', $options['method']);
$im->setOption('webp:lossless', $options['encoding'] == 'lossless' ? 'true' : 'false');
$im->setOption('webp:low-memory', $options['low-memory'] ? 'true' : 'false');
$im->setOption('webp:alpha-quality', $options['alpha-quality']);
if ($options['near-lossless'] != 100) {
if (version_compare($versionNumber, '7.0.10-54', '>=')) {
$im->setOption('webp:near-lossless', $options['near-lossless']);
} else {
$this->logLn(
'Note: near-lossless is not supported in your version of ImageMagick. ' .
'ImageMagic >= 7.0.10-54 is required',
'italic'
);
}
}
if ($options['auto-filter'] === true) {
$im->setOption('webp:auto-filter', 'true');
}
if ($options['sharp-yuv'] === true) {
if (version_compare($versionNumber, '7.0.8-26', '>=')) {
$im->setOption('webp:use-sharp-yuv', 'true');
} else {
$this->logLn(
'Note: "sharp-yuv" option is not supported in your version of ImageMagick. ' .
'ImageMagic >= 7.0.8-26 is required',
'italic'
);
}
}
if ($options['metadata'] == 'none') {
// To strip metadata, we need to use the stripImage() method. However, that method does not only remove
// metadata, but color profiles as well. We want to keep the color profiles, so we grab it now to be able
// to restore it. (Thanks, Max Eremin: https://www.php.net/manual/en/imagick.stripimage.php#120380)
// Grab color profile (to be able to restore them)
$profiles = $im->getImageProfiles("icc", true);
// Strip metadata (and color profiles)
$im->stripImage();
// Restore color profiles
if (!empty($profiles)) {
$im->profileImage("icc", $profiles['icc']);
}
}
if ($this->isQualityDetectionRequiredButFailing()) {
// Luckily imagick is a big boy, and automatically converts with same quality as
// source, when the quality isn't set.
// So we simply do not set quality.
// This actually kills the max-quality functionality. But I deem that this is more important
// because setting image quality to something higher than source generates bigger files,
// but gets you no extra quality. When failing to limit quality, you at least get something
// out of it
$this->logLn('Converting without setting quality in order to achieve auto quality');
} else {
$im->setImageCompressionQuality($this->getCalculatedQuality());
}
// https://stackoverflow.com/questions/29171248/php-imagick-jpeg-optimization
// setImageFormat
// TODO: Read up on
// https://www.smashingmagazine.com/2015/06/efficient-image-resizing-with-imagemagick/
// https://github.com/nwtn/php-respimg
// TODO:
// Should we set alpha channel for PNG's like suggested here:
// https://gauntface.com/blog/2014/09/02/webp-support-with-imagemagick-and-php ??
// It seems that alpha channel works without... (at least I see completely transparerent pixels)
// We used to use writeImageFile() method. But we now use getImageBlob(). See issue #43
// This might throw - we let it!
$imageBlob = $im->getImageBlob();
$success = file_put_contents($this->destination, $imageBlob);
if (!$success) {
throw new CreateDestinationFileException('Failed writing file');
}
// Btw: check out processWebp() method here:
// https://github.com/Intervention/image/blob/master/src/Intervention/Image/Imagick/Encoder.php
}
}