/**
* Watermark.
* @param Driver $watermark
* @param integer $offset_x
* @param integer $offset_y
* @param integer $opacity
*/
protected function _watermark(Driver $watermark, $offset_x, $offset_y, $opacity)
{
$overlay = imagecreatefromstring($watermark->render());
imagesavealpha($overlay, true);
$width = imagesx($overlay);
$height = imagesy($overlay);
if ($opacity < 100) {
$opacity = round(abs($opacity * 127 / 100 - 127));
$color = imagecolorallocatealpha($overlay, 127, 127, 127, $opacity);
imagelayereffect($overlay, IMG_EFFECT_OVERLAY);
imagefilledrectangle($overlay, 0, 0, $width, $height, $color);
}
imagealphablending($this->image, true);
imagecopy($this->image, $overlay, $offset_x, $offset_y, 0, 0, $width, $height);
imagedestroy($overlay);
}
/**
* Watermark.
* @param Driver $image
* @param integer $offset_x
* @param integer $offset_y
* @param integer $opacity
*/
protected function _watermark(Driver $image, $offset_x, $offset_y, $opacity)
{
$watermark = new \Imagick();
$watermark->readImageBlob($image->render(), $image->filename);
if ($watermark->getImageAlphaChannel() !== \Imagick::ALPHACHANNEL_ACTIVATE) {
$watermark->setImageAlphaChannel(\Imagick::ALPHACHANNEL_OPAQUE);
}
if ($opacity < 100) {
$watermark->evaluateImage(\Imagick::EVALUATE_MULTIPLY, $opacity / 100, \Imagick::CHANNEL_ALPHA);
}
$this->im->compositeImage($watermark, \Imagick::COMPOSITE_DISSOLVE, $offset_x, $offset_y);
}
