/**
* @param \PHPThumb\GD $phpthumb
* @return \PHPThumb\GD
*/
public function execute($phpthumb)
{
$currentDimensions = $phpthumb->getCurrentDimensions();
$watermarkDimensions = $this->wm->getCurrentDimensions();
$watermarkPositionX = $this->offsetX;
$watermarkPositionY = $this->offsetY;
if (preg_match('/right|east/i', $this->position)) {
$watermarkPositionX += $currentDimensions['width'] - $watermarkDimensions['width'];
} else {
if (!preg_match('/left|west/i', $this->position)) {
$watermarkPositionX += intval($currentDimensions['width'] / 2 - $watermarkDimensions['width'] / 2);
}
}
if (preg_match('/bottom|lower|south/i', $this->position)) {
$watermarkPositionY += $currentDimensions['height'] - $watermarkDimensions['height'];
} else {
if (!preg_match('/upper|top|north/i', $this->position)) {
$watermarkPositionY += intval($currentDimensions['height'] / 2 - $watermarkDimensions['height'] / 2);
}
}
$workingImage = $phpthumb->getWorkingImage();
$watermarkImage = $this->wm->getWorkingImage() ? $this->wm->getWorkingImage() : $this->wm->getOldImage();
$this->imageCopyMergeAlpha($workingImage, $watermarkImage, $watermarkPositionX, $watermarkPositionY, 0, 0, $watermarkDimensions['width'], $watermarkDimensions['height'], $this->opacity);
$phpthumb->setWorkingImage($workingImage);
return $phpthumb;
}
