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218 lines (174 loc) 路 5.06 KB
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<?php
namespace Resize;
use Exception;
use Imagick;
class Resize
{
private $image;
private $width;
private $height;
/**
* @param string $data
*
* @throws Exception
*/
public function __construct($data)
{
$this->image = new Imagick();
$this->image->readImageBlob($data);
$this->width = $this->image->getImageWidth();
$this->height = $this->image->getImageHeight();
}
/**
* @param int $width
* @param int $height
*
* @return Resize
*
* @throws \ImagickException
*/
public function crop(int $width, int $height)
{
$originalAspect = $this->width / $this->height;
if (empty($width)) {
$width = $height * $originalAspect;
}
if (empty($height)) {
$height = $width / $originalAspect;
}
if (empty($height) && empty($width)) {
$height = $this->height;
$width = $this->width;
}
if ($this->image->getImageFormat() == 'GIF') {
$this->image = $this->image->coalesceImages();
foreach ($this->image as $frame) {
$frame->cropThumbnailImage($width, $height);
}
$this->image->deconstructImages();
} else {
$this->image->cropThumbnailImage($width, $height);
}
return $this;
}
/**
* @param $color
*
* @return Resize
*
* @throws \ImagickException
*/
public function setBackground($color)
{
$this->image->setImageBackgroundColor($color);
$this->image = $this->image->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
return $this;
}
/**
* Output.
*
* Prints manipulated image.
*
* @param string $type
* @param int $quality
*
* @return string
*
* @throws Exception
*/
public function output(string $type, int $quality = 75)
{
return $this->save(null, $type, $quality);
}
/**
* @param string $path
* @param $type
* @param int $quality
*
* @return string
*
* @throws Exception
*/
public function save(string $path = null, string $type = '', int $quality = 75)
{
// Create directory with write permissions
if (null !== $path && !file_exists(dirname($path))) {
if (!@mkdir(dirname($path), 0755, true)) {
throw new Exception('Can\'t create directory '.dirname($path));
}
}
switch ($type) {
case 'jpg':
case 'jpeg':
$this->image->setImageCompressionQuality($quality);
$this->image->setImageFormat('jpg');
break;
case 'gif':
$this->image->setImageFormat('gif');
break;
case 'webp':
//$this->image->setImageFormat('webp');
$signature = $this->image->getImageSignature();
$temp = '/tmp/temp-'.$signature.'.'.strtolower($this->image->getImageFormat());
$output = '/tmp/output-'.$signature.'.webp';
// save temp
$this->image->writeImages($temp, true);
// convert temp
exec("cwebp -quiet -metadata none -q $quality $temp -o $output");
$data = file_get_contents($output);
//load webp
if (empty($path)) {
return $data;
} else {
file_put_contents($path, $data, LOCK_EX);
}
$this->image->clear();
$this->image->destroy();
//delete webp
unlink($output);
unlink($temp);
return;
break;
case 'png':
/* Scale quality from 0-100 to 0-9 */
$scaleQuality = round(($quality / 100) * 9);
/* Invert quality setting as 0 is best, not 9 */
$invertScaleQuality = 9 - $scaleQuality;
$this->image->setImageCompressionQuality($invertScaleQuality);
$this->image->setImageFormat('png');
break;
default:
throw new Exception('Invalid output type given');
break;
}
if (empty($path)) {
return $this->image->getImagesBlob();
} else {
$this->image->writeImages($path, true);
}
$this->image->clear();
$this->image->destroy();
}
/**
* @param int $newHeight
*
* @return int
*/
protected function getSizeByFixedHeight(int $newHeight):int
{
$ratio = $this->width / $this->height;
$newWidth = $newHeight * $ratio;
return $newWidth;
}
/**
* @param int $newWidth
*
* @return int
*/
protected function getSizeByFixedWidth(int $newWidth):int
{
$ratio = $this->height / $this->width;
$newHeight = $newWidth * $ratio;
return $newHeight;
}
}