/**
* Useful method to calculate real crop measures. Used when you crop an image
* which is smaller than the original one. In those cases you can call
* calculateCropMeasures to retrieve the real $ox, $oy, $dx & $dy of the
* image to be cropped.
*
* Note that you need to set the destiny image and pass the smaller (cropped)
* image to this function.
*
* @param string|Image $croppedFile The cropped image.
* @param mixed $ox Origin X.
* @param int $oy Origin Y.
* @param int $dx Destiny X.
* @param int $dy Destiny Y.
* @return array
*/
public function calculateCropMeasures($croppedFile, $ox, $oy = null, $dx = null, $dy = null)
{
list($ox, $oy, $dx, $dy) = Normalize::cropMeasures($ox, $oy, $dx, $dy);
if (!$croppedFile instanceof self) {
$croppedFile = new self($croppedFile);
}
$meta = $croppedFile->getMetadata();
$rateWidth = $this->width / $meta['width'];
$rateHeight = $this->height / $meta['height'];
$ox = round($ox * $rateWidth);
$oy = round($oy * $rateHeight);
$dx = round($dx * $rateHeight);
$dy = round($dy * $rateHeight);
$width = $dx - $ox;
$height = $dy - $oy;
return [$ox, $oy, $dx, $dy, $width, $height];
}
/**
* @expectedException Elboletaire\Watimage\Exception\InvalidArgumentException
*/
public function testCropMeasuresThrowsException()
{
Normalize::cropMeasures(['ox' => 46, 'oy' => 56, 'dx' => 40]);
}
