/**
* Takes samples from the given GD at 5 pixel increments
* @param GDBackend $gd The source image
* @param integer $horizontal Number of samples to take horizontally
* @param integer $vertical Number of samples to take vertically
* @return array List of colours for each sample, each given as an associative
* array with red, blue, green, and alpha components
*/
protected function sampleAreas(GDBackend $gd, $horizontal = 4, $vertical = 4)
{
$samples = array();
for ($y = 0; $y < $vertical; $y++) {
for ($x = 0; $x < $horizontal; $x++) {
$colour = imagecolorat($gd->getImageResource(), $x * 5, $y * 5);
$samples[] = ImageColorsforIndex($gd->getImageResource(), $colour);
}
}
return $samples;
}
/**
* Merge two Images together
*/
public function merge(GDBackend $image)
{
imagealphablending($this->owner->getImageResource(), false);
imagesavealpha($this->owner->getImageResource(), true);
imagealphablending($image->getImageResource(), false);
imagesavealpha($image->getImageResource(), true);
$srcX = 0;
$srcY = 0;
$srcW = $image->getWidth();
$srcH = $image->getHeight();
$dstX = round(($this->owner->getWidth() - $srcW) / 2);
$dstY = round(($this->owner->getHeight() - $srcH) / 2);
$dstW = $image->getWidth();
$dstH = $image->getHeight();
imagecopyresampled($this->owner->getImageResource(), $image->getImageResource(), $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH);
$output = clone $this->owner;
$output->setImageResource($this->owner->getImageResource());
return $output;
}
