/**
* Test distance
*/
public function testDistance()
{
$this->assertGreaterThan(0.8, Color::create('ff0000')->distance('0000ff'));
$this->assertLessThan(0.1, Color::create('ff0000')->distance('f80800'));
}
/**
* Filter method: colorize
*
* @param string|\Zork\Image\Color $color
* @return \Zork\Image\Image
* @throws \Zork\Image\FilterException
* @codeCoverageIgnore
*/
public function filterColorize($color = 'gray')
{
if (!$color instanceof Color) {
$color = Color::create($color);
}
if (!imagefilter($this->resource, IMG_FILTER_COLORIZE, $color->getRed(), $color->getGreen(), $color->getBlue(), intval($color->getAlpha() * 127 / 255))) {
throw new Exception\FilterException('Filter cannot execute');
}
}
/**
* Assert 2 image files are equals (within a tolerance)
*
* @param string $expected
* @param string $actual
* @param string $message
* @param float $downscale
* @param float $tolerance
* @param bool $alpha
*/
protected function assertImageFileEquals($expected, $actual, $message = '', $downscale = 5, $tolerance = 0.1, $alpha = false)
{
$expectedInfo = getimagesize($expected);
$actualInfo = getimagesize($actual);
$this->assertSame(array_slice($expectedInfo, 0, 3), array_slice($actualInfo, 0, 3), $message);
list($width, $height, $type) = $actualInfo;
$scaleToWidth = max(1, intval($width / $downscale));
$scaleToHeight = max(1, intval($height / $downscale));
$this->assertContains($type, array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG), 'Image types are not comparable');
switch ($type) {
case IMAGETYPE_GIF:
$expectedInput = imagecreatefromgif($expected);
$actualInput = imagecreatefromgif($actual);
break;
case IMAGETYPE_JPEG:
$expectedInput = imagecreatefromjpeg($expected);
$actualInput = imagecreatefromjpeg($actual);
break;
case IMAGETYPE_PNG:
$expectedInput = imagecreatefrompng($expected);
$actualInput = imagecreatefrompng($actual);
break;
default:
throw new \Exception();
}
$expectedCompare = imagecreatetruecolor($scaleToWidth, $scaleToHeight);
$actualCompare = imagecreatetruecolor($scaleToWidth, $scaleToHeight);
imagecopyresampled($expectedCompare, $expectedInput, 0, 0, 0, 0, $scaleToWidth, $scaleToHeight, $width, $height);
imagecopyresampled($actualCompare, $actualInput, 0, 0, 0, 0, $scaleToWidth, $scaleToHeight, $width, $height);
$distance = 0;
for ($x = 0; $x < $scaleToWidth; $x++) {
for ($y = 0; $y < $scaleToHeight; $y++) {
$expectedIndex = imagecolorat($expectedCompare, $x, $y);
$actualIndex = imagecolorat($actualCompare, $x, $y);
@(list($er, $eg, $eb, $ea) = imagecolorsforindex($expectedCompare, $expectedIndex));
@(list($ar, $ag, $ab, $aa) = imagecolorsforindex($actualCompare, $actualIndex));
$ea = $alpha ? intval($ea * 255 / 127) : 0;
$aa = $alpha ? intval($aa * 255 / 127) : 0;
$expectedColor = new Color($er, $eg, $eb, $ea);
$actualColor = new Color($ar, $ag, $ab, $aa);
$distance += $expectedColor->distance($actualColor, $alpha);
}
}
$this->assertLessThanOrEqual($tolerance, $distance / $scaleToWidth / $scaleToHeight, $message);
}
