function applyFilter(Canvas $canvas)
{
$himage = $canvas->getImage();
if ($this->usegdfilter) {
if (!imagefilter($himage, IMG_FILTER_PIXELATE, $this->pixelsize, $this->advanced)) {
throw new GraphicsException("Failed to apply filter");
}
} else {
// TODO: Implement our own pixelation filter
}
$canvas->setImage($himage);
return null;
}
/**
* @overload Canvas::__construct()
* @param string $filename The file to load
* @throws GraphicsException
*/
function createFromString($string)
{
$n = new Canvas(1, 1);
$img = @imagecreatefromstring($string);
if ($img) {
$n->setImage($img);
} else {
throw new GraphicsException("Failed to load the image.", GraphicsException::ERR_LOAD_FAILURE);
}
return $n;
}
