/**
* Operations have to be done per-channel, if not,
* channels will spill onto each other. Once we have
* our result, in the form of an integer triplet,
* we create a new color node to hold the result.
*
* @param ILess_Environment $env
* @param string $op
* @param ILess_Node $other
* @return ILess_Node_Color
* @throws InvalidArgumentException
*/
public function operate(ILess_Environment $env, $op, ILess_Node $other)
{
$result = array();
if (!$other instanceof ILess_Node_Color) {
if (!self::methodExists($other, 'toColor')) {
throw new InvalidArgumentException('The other node must implement toColor() method to operate');
}
$other = $other->toColor();
if (!$other instanceof ILess_Node_Color) {
throw new InvalidArgumentException('The toColor() method must return an instance of ILess_Node_Color');
}
}
$t = $this->getRGB();
$o = $other->getRGB();
for ($c = 0; $c < 3; $c++) {
$result[$c] = ILess_Math::operate($op, $t[$c], $o[$c]);
if ($result[$c] > 255) {
$result[$c] = 255;
} elseif ($result < 0) {
$result[$c] = 0;
}
}
return new ILess_Node_Color($result, $this->color->getAlpha() + $other->color->getAlpha());
}
/**
* @covers getAlpha
*/
public function testAlpha()
{
$color = new ILess_Color();
$this->assertEquals(1, $color->getAlpha());
}
