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<?php
/*
* This file is part of the Imagine package.
*
* (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Imagine\Gd;
use Imagine\Effects\EffectsInterface;
use Imagine\Exception\RuntimeException;
use Imagine\Image\Palette\Color\ColorInterface;
use Imagine\Image\Palette\Color\RGB as RGBColor;
/**
* Effects implementation using the GD library
*/
class Effects implements EffectsInterface
{
private $resource;
public function __construct($resource)
{
$this->resource = $resource;
}
/**
* {@inheritdoc}
*/
public function gamma($correction)
{
if (false === imagegammacorrect($this->resource, 1.0, $correction)) {
throw new RuntimeException('Failed to apply gamma correction to the image');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function negative()
{
if (false === imagefilter($this->resource, IMG_FILTER_NEGATE)) {
throw new RuntimeException('Failed to negate the image');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function grayscale()
{
if (false === imagefilter($this->resource, IMG_FILTER_GRAYSCALE)) {
throw new RuntimeException('Failed to grayscale the image');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function colorize(ColorInterface $color)
{
if (!$color instanceof RGBColor) {
throw new RuntimeException('Colorize effects only accepts RGB color in GD context');
}
if (false === imagefilter($this->resource, IMG_FILTER_COLORIZE, $color->getRed(), $color->getGreen(), $color->getBlue())) {
throw new RuntimeException('Failed to colorize the image');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function sharpen()
{
$sharpenMatrix = array(array(-1,-1,-1), array(-1,16,-1), array(-1,-1,-1));
$divisor = array_sum(array_map('array_sum', $sharpenMatrix));
if (false === imageconvolution($this->resource, $sharpenMatrix, $divisor, 0)) {
throw new RuntimeException('Failed to sharpen the image');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function blur($sigma = 1)
{
if (false === imagefilter($this->resource, IMG_FILTER_GAUSSIAN_BLUR)) {
throw new RuntimeException('Failed to blur the image');
}
return $this;
}
}
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