/**
* Applies the sepia filter to an image resource
*
* @param ImageResource $aResource
*/
public function applyFilter(ImageResource $aResource)
{
if ($this->degrees === 0) {
return;
}
$width = $aResource->getX();
$height = $aResource->getY();
// cache calculated colors in a map...
$colorMap = array();
for ($x = 0; $x < $width; ++$x) {
for ($y = 0; $y < $height; ++$y) {
$color = ColorUtil::getColorAt($aResource, Coordinate::create($x, $y));
if (!isset($colorMap[$color->getColorIndex()])) {
// calculate the new color
$hsl = ColorUtil::rgb2hsl($color->getRed(), $color->getGreen(), $color->getBlue());
$hsl[0] += $this->degrees;
$rgb = ColorUtil::hsl2rgb($hsl[0], $hsl[1], $hsl[2]);
$newcol = imagecolorallocate($aResource->getResource(), $rgb[0], $rgb[1], $rgb[2]);
$colorMap[$color->getColorIndex()] = $newcol;
} else {
$newcol = $colorMap[$color->getColorIndex()];
}
imagesetpixel($aResource->getResource(), $x, $y, $newcol);
}
}
$colorMap = null;
}
public function testCreate()
{
$width = 250;
$height = 750;
$color = 'ff00ff';
$res = ImageGenerator::create($width, $height, new Color($color));
$this->assertEquals($width, $res->getX());
$this->assertEquals($height, $res->getY());
$this->assertEquals($color, ColorUtil::getColorAt($res, Coordinate::create(0, 0))->getHexColor());
$this->assertEquals($color, ColorUtil::getColorAt($res, Coordinate::create($width / 2, $height / 2))->getHexColor());
$this->assertEquals($color, ColorUtil::getColorAt($res, Coordinate::create($width - 1, $height - 1))->getHexColor());
}
public function testGradient()
{
$width = 250;
$height = 750;
$startColor = 'ffffff';
$endColor = '000000';
$res = ImageGenerator::gradient($width, $height, 1, new Color($startColor), new Color($endColor));
$this->assertEquals($width, $res->getWidth());
$this->assertEquals($height, $res->getHeight());
$this->assertEquals($startColor, ColorUtil::getColorAt($res, Coordinate::create(0, 0))->getHexColor());
$this->assertEquals('7e7e7e', ColorUtil::getColorAt($res, Coordinate::create($width / 2, $height / 2))->getHexColor());
$this->assertEquals($endColor, ColorUtil::getColorAt($res, Coordinate::create($width - 1, $height - 1))->getHexColor());
}
public function testFilter()
{
$image = $this->getOriginalImage(ImageType::PNG);
$filter = new ImageFilterGrayScale();
$rasterizer = new Rasterizer($image, new GridRasterStrategy(25, 25, true));
$segments = $rasterizer->getSegments();
$rasterizer->filter($filter, $segments->offsetGet(0));
$rasterizer->filter($filter, $segments->offsetGet(5));
$originalColor = "ff0000";
$filteredColor = "4c4c4c";
$color = ColorUtil::getColorAt($rasterizer->getResource(), Coordinate::create(50, 50));
$this->assertEquals($filteredColor, $color->getHexColor());
$color = ColorUtil::getColorAt($rasterizer->getResource(), Coordinate::create(160, 50));
$this->assertEquals($originalColor, $color->getHexColor());
$color = ColorUtil::getColorAt($rasterizer->getResource(), Coordinate::create(50, 160));
$this->assertEquals($originalColor, $color->getHexColor());
$color = ColorUtil::getColorAt($rasterizer->getResource(), Coordinate::create(160, 160));
$this->assertEquals($filteredColor, $color->getHexColor());
}
protected function assertColorQ4(ImageImageResource $aRes, $aColor)
{
$coord = Coordinate::create($aRes->getWidth() - self::OFFSET, $aRes->getHeight() - self::OFFSET);
$testColor = $aRes->getColorAt($coord)->getHexColor();
$this->assertEquals($aColor, $testColor, "Checking color in quadrant 4 {$coord} {$aColor} vs {$testColor}");
}
/**
* Returns the color at the specified location of the image resource
*
* @param ImageResource $aResource
* @param Coordinate $aCoordinate
*
* @return IColor The color found at the coordinates
*/
public static function getColorAt(ImageResource $aResource, Coordinate $aCoordinate)
{
$index = imagecolorat($aResource->getResource(), $aCoordinate->getX(), $aCoordinate->getY());
$color = new Color($index);
return $color;
}
public function testGetColorAt()
{
$res = $this->getImageRes($this->getOriginalImage(ImageType::JPG), __METHOD__);
$color = ColorUtil::getColorAt($res, Coordinate::create(20, 20));
$this->assertColor($color, 'fe0000');
}
