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Code Issues Releases Wiki Activity

add webp support to GD

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This commit is contained in:
horst-n
2019-04-24 21:29:09 +02:00
parent c1814c8e6b
commit bbe13583c5
1 changed files with 73 additions and 14 deletions
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87
wire/core/ImageSizerEngineGD.php
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@@ -322,32 +322,73 @@ class ImageSizerEngineGD extends ImageSizerEngine {
}
}
// optionally apply interlace bit to the final image.
// this will result in progressive JPEGs
if($this->interlace && \IMAGETYPE_JPEG == $this->imageType) {
if(0 == imageinterlace($thumb, 1)) {
// log that setting the interlace bit has failed ?
// ...
}
}
// write to file
// write to file(s)
$result = false;
switch($this->imageType) {
case \IMAGETYPE_GIF:
// correct gamma from linearized 1.0 back to 2.0
$this->gammaCorrection($thumb, false);
$result = imagegif($thumb, $dstFilename);
// If only a WebP file is required
if($this->webpOnly) {
$result = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
} else {
// optionally save an additional WebP file
if($this->webpAdd) {
$resultWebp = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
}
// save the final GIF image file
$result = imagegif($thumb, $dstFilename);
}
break;
case \IMAGETYPE_PNG:
// optionally correct gamma from linearized 1.0 back to 2.0
if(!$this->hasAlphaChannel()) $this->gammaCorrection($thumb, false);
// always use highest compression level for PNG (9) per @horst
$result = imagepng($thumb, $dstFilename, 9);
// If only a WebP file is required
if($this->webpOnly) {
$result = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
} else {
// optionally save an additional WebP file
if($this->webpAdd) {
$resultWebp = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
}
// save the final PNG image file and always use highest compression level (9) per @horst
$result = imagepng($thumb, $dstFilename, 9);
}
break;
case \IMAGETYPE_JPEG:
// correct gamma from linearized 1.0 back to 2.0
$this->gammaCorrection($thumb, false);
$result = imagejpeg($thumb, $dstFilename, $this->quality);
// If only a WebP file is required
if($this->webpOnly) {
$result = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
} else {
// optionally save an additional WebP file
if($this->webpAdd) {
$resultWebp = $this->imSaveWebP($thumb, $srcFilename, $this->webpQuality);
}
// optionally apply interlace bit to the final image. this will result in progressive JPEGs
if($this->interlace) {
if(0 == imageinterlace($thumb, 1)) {
// log that setting the interlace bit has failed ?
// ...
}
}
// save the final JPEG image file
$result = imagejpeg($thumb, $dstFilename, $this->quality);
}
break;
}
@@ -357,6 +398,24 @@ class ImageSizerEngineGD extends ImageSizerEngine {
return $result;
}
/**
* Create WebP image (@horst)
* Is requested by image options: ["webpAdd" => true] OR ["webpOnly" => true]
*
* @param resource $im
* @param string $dstFilename
* @param int $quality
*
* @return boolean true | false
*
*/
protected function imSaveWebP($im, $filename, $quality = 90) {
if(!function_exists('imagewebp')) return false;
$newBasename = str_replace(array('.jpg', '.jpeg', '.png', '.gif'), '.webp', basename($filename));
return imagewebp($im, dirname($filename) . '/' . $newBasename, $quality);
}
/**
* Rotate image (@horst)
*