/**
* {@inheritdoc}
*/
public final function getColor(PointInterface $position)
{
$l = $this->getDistance($position);
if ($l >= $this->length) {
return $this->end;
}
if ($l < 0) {
return $this->start;
}
$color = new Color(array((int) min(255, min($this->start->getRed(), $this->end->getRed()) + round(abs($this->end->getRed() - $this->start->getRed()) * $l / $this->length)), (int) min(255, min($this->start->getGreen(), $this->end->getGreen()) + round(abs($this->end->getGreen() - $this->start->getGreen()) * $l / $this->length)), (int) min(255, min($this->start->getBlue(), $this->end->getBlue()) + round(abs($this->end->getBlue() - $this->start->getBlue()) * $l / $this->length))), (int) min(100, min($this->start->getAlpha(), $this->end->getAlpha()) + round(abs($this->end->getAlpha() - $this->start->getAlpha()) * $l / $this->length)));
return $color;
}
/**
* {@inheritdoc}
*/
public function colorize(Color $color)
{
if (false === imagefilter($this->resource, IMG_FILTER_COLORIZE, $color->getRed(), $color->getGreen(), $color->getBlue())) {
throw new RuntimeException('Failed to colorize the image');
}
return $this;
}
/**
* @cover Imagine\Image\Color::__construct
* @cover Imagine\Image\Color::getRed
* @cover Imagine\Image\Color::getGreen
* @cover Imagine\Image\Color::getAlpha
* @cover Imagine\Image\Color::__toString
* @cover Imagine\Image\Color::isOpaque
*/
public function testShouldSetColorToWhite()
{
$color = new Color('fff');
$this->assertEquals(255, $color->getRed());
$this->assertEquals(255, $color->getGreen());
$this->assertEquals(255, $color->getBlue());
$this->assertEquals(0, $color->getAlpha());
$this->assertEquals('#ffffff', (string) $color);
$this->assertEquals('#00ff00', (string) new Color('00ff00'));
$this->assertTrue($color->isOpaque());
}
/**
* Internal
*
* Generates a GD color from Color instance
*
* @param Color $color
*
* @return resource
*
* @throws RuntimeException
*/
private function getColor(Color $color)
{
$index = imagecolorallocatealpha($this->resource, $color->getRed(), $color->getGreen(), $color->getBlue(), round(127 * $color->getAlpha() / 100));
if (false === $index) {
throw new RuntimeException(sprintf('Unable to allocate color "RGB(%s, %s, %s)" with transparency ' . 'of %d percent', $color->getRed(), $color->getGreen(), $color->getBlue(), $color->getAlpha()));
}
return $index;
}
/**
* Internal
*
* Generates a GD color from Color instance
*
* @param Imagine\Image\Color $color
*
* @return resource
*
* @throws Imagine\Exception\RuntimeException
*/
private function getColor(Color $color)
{
static $cache = array();
$key = (string) $color . "-" . $color->getAlpha();
if (!isset($cache[$key])) {
$cache[$key] = imagecolorallocatealpha(
$this->resource, $color->getRed(), $color->getGreen(),
$color->getBlue(), round(127 * $color->getAlpha() / 100)
);
}
if (false === $cache[$key]) {
throw new RuntimeException(sprintf(
'Unable to allocate color "RGB(%s, %s, %s)" with transparency '.
'of %d percent', $color->getRed(), $color->getGreen(),
$color->getBlue(), $color->getAlpha()
));
}
return $cache[$key];
}
