/**
* (non-PHPdoc)
* @see Imagine\ImageInterface::applyMask()
*/
public function applyMask(ImageInterface $mask)
{
if (!$mask instanceof self) {
throw new InvalidArgumentException('Cannot mask non-gd images');
}
$size = $this->getSize();
$maskSize = $mask->getSize();
if ($size != $maskSize) {
throw new InvalidArgumentException(sprintf('The given mask doesn\'t match current image\'s sise, Current ' . 'mask\'s dimensions are %s, while image\'s dimensions are %s', $maskSize, $size));
}
for ($x = 0; $x < $size->getWidth(); $x++) {
for ($y = 0; $y < $size->getHeight(); $y++) {
$color = imagecolorat($this->resource, $x, $y);
$info = imagecolorsforindex($this->resource, $color);
$maskColor = $color = imagecolorat($mask->resource, $x, $y);
$maskInfo = imagecolorsforindex($mask->resource, $maskColor);
if (false === imagesetpixel($this->resource, $x, $y, imagecolorallocatealpha($this->resource, $info['red'], $info['green'], $info['blue'], round((127 - $info['alpha']) * $maskInfo['red'] / 255)))) {
throw new RuntimeException('Apply mask operation failed');
}
}
}
return $this;
}
/**
* (non-PHPdoc)
* @see Imagine\ImageInterface::applyMask()
*/
public function applyMask(ImageInterface $mask)
{
if (!$mask instanceof self) {
throw new InvalidArgumentException('Can only apply instances of Imagine\\Gmagick\\Image as masks');
}
$size = $this->getSize();
$maskSize = $mask->getSize();
if ($size != $maskSize) {
throw new InvalidArgumentException(sprintf('The given mask doesn\'t match current image\'s sise, current ' . 'mask\'s dimensions are %s, while image\'s dimensions are %s', $maskSize, $size));
}
try {
$mask = $mask->copy();
$this->gmagick->compositeimage($mask->gmagick, \Gmagick::COMPOSITE_DEFAULT, 0, 0);
} catch (\Exception $e) {
throw new RuntimeException('Apply mask operation failed', $e->getCode(), $e);
}
return $this;
}
/**
* @param Imagine\ImageInterface $image
*
* @return array
*/
private function normalize(ImageInterface $image)
{
$step = (int) round(255 / $this->buckets);
$red = $green = $blue = $alpha = array();
for ($i = 1; $i <= $this->buckets; $i++) {
$range = new Range(($i - 1) * $step, $i * $step);
$red[] = new Bucket($range);
$green[] = new Bucket($range);
$blue[] = new Bucket($range);
$alpha[] = new Bucket($range);
}
foreach ($image->histogram() as $color) {
foreach ($red as $bucket) {
$bucket->add($color->getRed());
}
foreach ($green as $bucket) {
$bucket->add($color->getGreen());
}
foreach ($blue as $bucket) {
$bucket->add($color->getBlue());
}
foreach ($alpha as $bucket) {
$bucket->add($color->getAlpha());
}
}
$total = $image->getSize()->square();
$callback = function (Bucket $bucket) use($total) {
return count($bucket) / $total;
};
return array(array_map($callback, $red), array_map($callback, $green), array_map($callback, $blue), array_map($callback, $alpha));
}