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<?php
namespace Del\Image\Strategy;
class PngStrategy extends AbstractTransparentImage implements ImageTypeStrategyInterface
{
/**
* @param string $filename
* @return resource
*/
public function create($filename)
return imagecreatefrompng($filename);
}
* @param resource $resource
* @param int $compression
* @return void
public function save($resource, $filename, $compression)
unset($compression);
imagepng($resource, $filename);
* @return string
public function getContentType()
return 'image/png';
* @param $resource
public function render($resource)
imagealphablending($resource, true);
imagesavealpha($resource, true);
imagepng($resource);
public function handleTransparency($newImage, $image)
// Get transparency color's index number
$transparency = $this->getTransparencyIndex($image);
// Is a strange index other than -1 set?
if ($transparency >= 0) {
// deal with alpha channels
$this->prepWithExistingIndex($newImage, $image, $transparency);
} else {
$this->prepTransparentPng($newImage);
delboy1978uk /
image
