100 lines
2.8 KiB
PHP
100 lines
2.8 KiB
PHP
<?php
|
||
|
||
namespace Kirby\Plugins\ImageKit\Optimizer;
|
||
|
||
|
||
/**
|
||
* Uses `mozjpeg` for encoding JPEG files. This often creates
|
||
* much smaller JPEG files than most other encoders at a
|
||
* comparable quality.
|
||
*
|
||
* See: https://github.com/mozilla/mozjpeg
|
||
*/
|
||
class MozJPEG extends Base {
|
||
|
||
public static $selector = ['image/jpeg'];
|
||
public $priority = [100, 5];
|
||
|
||
protected $targetFile;
|
||
protected $tmpFile;
|
||
|
||
|
||
public static function defaults() {
|
||
return [
|
||
'imagekit.mozjpeg.bin' => null,
|
||
'imagekit.mozjpeg.quality' => 85,
|
||
'imagekit.mozjpeg.flags' => '',
|
||
];
|
||
}
|
||
|
||
public static function available() {
|
||
return !empty(static::$kirby->option('imagekit.mozjpeg.bin'));
|
||
}
|
||
|
||
public function pre() {
|
||
$this->targetFile = $this->thumb->destination->root;
|
||
|
||
if($this->isDriver('im')) {
|
||
// Instruct imagemagick driver to write out a temporary,
|
||
// uncrompressed TGA file, so our JPEG will not be
|
||
// compressed twice. I played around with PNM too,
|
||
// because it’s much faster as an intermediate format,
|
||
// but some images got corrupted by mozjpeg.
|
||
$this->tmpFile = $this->getTemporaryFilename('tga');
|
||
$this->thumb->destination->root = $this->tmpFile;
|
||
} else {
|
||
// If GD driver (or an unknown driver) is active, we
|
||
// need to encode twice, because SimpleImage can only
|
||
// save to JPEG, PNG or GIF. As saving a 24-bit
|
||
// lossless PNG as an intermediate step is too
|
||
// expensive for large images, we need to encode
|
||
// as JPEG :-(
|
||
// This also needs a temporary file, because it seems
|
||
// that mozjpeg cannot overwrite the it’s file.
|
||
$this->tmpFile = $this->getTemporaryFilename();
|
||
$this->thumb->destination->root = $this->tmpFile;
|
||
$this->thumb->options['quality'] = 99;
|
||
}
|
||
}
|
||
|
||
public function post() {
|
||
|
||
$command = [];
|
||
|
||
$command[] = static::$kirby->option('imagekit.mozjpeg.bin');
|
||
|
||
// Quality
|
||
$command[] = '-quality ' . $this->option('imagekit.mozjpeg.quality');
|
||
|
||
// Interlace
|
||
if($this->thumb->options['interlace']) {
|
||
$command[] = '-progressive';
|
||
}
|
||
|
||
// Grayscale
|
||
if($this->thumb->options['grayscale']) {
|
||
$command[] = '-grayscale';
|
||
}
|
||
|
||
// Set output file.
|
||
$command[] = '-outfile "' . $this->targetFile . '"';
|
||
|
||
$flags = $this->option('imagekit.mozjpeg.flags');
|
||
if(!empty($flags)) {
|
||
// Add exra flags, if defined by user.
|
||
$command[] = $flags;
|
||
}
|
||
|
||
// Use tmp file as input.
|
||
$command[] = '"' . $this->tmpFile . '"';
|
||
|
||
exec(implode(' ', $command));
|
||
// Delete temporary file and restore destination path
|
||
// on thumb object. This only needs to be done, if
|
||
// ImageMagick driver is used and the input file was
|
||
// in PNM format.
|
||
@unlink($this->tmpFile);
|
||
$this->thumb->destination->root = $this->targetFile;
|
||
}
|
||
|
||
}
|