function getImageResource()
{
if ($this->file !== NULL) {
if (!$this->isTemporary) {
$this->execute("convert -strip %input %output", self::PNG);
}
$this->setImageResource(imagecreatefrompng($this->file));
if ($this->isTemporary) {
unlink($this->file);
}
$this->file = NULL;
}
return parent::getImageResource();
}
/**
* Puts another image into this image.
* @param NImage
* @param mixed x-coordinate in pixels or percent
* @param mixed y-coordinate in pixels or percent
* @param int opacity 0..100
* @return self
*/
public function place(NImage $image, $left = 0, $top = 0, $opacity = 100)
{
$opacity = max(0, min(100, (int) $opacity));
if (substr($left, -1) === '%') {
$left = round(($this->getWidth() - $image->getWidth()) / 100 * $left);
}
if (substr($top, -1) === '%') {
$top = round(($this->getHeight() - $image->getHeight()) / 100 * $top);
}
if ($opacity === 100) {
imagecopy(
$this->getImageResource(), $image->getImageResource(),
$left, $top, 0, 0, $image->getWidth(), $image->getHeight()
);
} elseif ($opacity <> 0) {
imagecopymerge(
$this->getImageResource(), $image->getImageResource(),
$left, $top, 0, 0, $image->getWidth(), $image->getHeight(),
$opacity
);
}
return $this;
}