/**
* {@inheritdoc}
*/
public final function getColor(PointInterface $position)
{
$l = $this->getDistance($position);
if ($l >= $this->length) {
return $this->end;
}
if ($l < 0) {
return $this->start;
}
return $this->start->getPalette()->blend($this->start, $this->end, $l / $this->length);
}
/**
* {@inheritdoc}
*/
public function create(BoxInterface $size, ColorInterface $color = null)
{
$width = $size->getWidth();
$height = $size->getHeight();
$resource = imagecreatetruecolor($width, $height);
if (false === $resource) {
throw new RuntimeException('Create operation failed');
}
$palette = null !== $color ? $color->getPalette() : new RGB();
$color = $color ? $color : $palette->color('fff');
if (!$color instanceof RGBColor) {
throw new InvalidArgumentException('GD driver only supports RGB colors');
}
$index = imagecolorallocatealpha($resource, $color->getRed(), $color->getGreen(), $color->getBlue(), round(127 * (100 - $color->getAlpha()) / 100));
if (false === $index) {
throw new RuntimeException('Unable to allocate color');
}
if (false === imagefill($resource, 0, 0, $index)) {
throw new RuntimeException('Could not set background color fill');
}
if ($color->getAlpha() >= 95) {
imagecolortransparent($resource, $index);
}
return $this->wrap($resource, $palette, new MetadataBag());
}
/**
* {@inheritdoc}
*/
public function create(BoxInterface $size, ColorInterface $color = null)
{
$width = $size->getWidth();
$height = $size->getHeight();
$palette = null !== $color ? $color->getPalette() : new RGB();
$color = null !== $color ? $color : $palette->color('fff');
try {
$gmagick = new \Gmagick();
// Gmagick does not support creation of CMYK GmagickPixel
// see https://bugs.php.net/bug.php?id=64466
if ($color instanceof CMYKColor) {
$switchPalette = $palette;
$palette = new RGB();
$pixel = new \GmagickPixel($palette->color((string) $color));
} else {
$switchPalette = null;
$pixel = new \GmagickPixel((string) $color);
}
if ($color->getPalette()->supportsAlpha() && $color->getAlpha() < 100) {
throw new NotSupportedException('alpha transparency is not supported');
}
$gmagick->newimage($width, $height, $pixel->getcolor(false));
$gmagick->setimagecolorspace(\Gmagick::COLORSPACE_TRANSPARENT);
$gmagick->setimagebackgroundcolor($pixel);
$image = new Image($gmagick, $palette, new MetadataBag());
if ($switchPalette) {
$image->usePalette($switchPalette);
}
return $image;
} catch (\GmagickException $e) {
throw new RuntimeException('Could not create empty image', $e->getCode(), $e);
}
}
/**
* {@inheritdoc}
*/
public function create(BoxInterface $size, ColorInterface $color = null)
{
$width = $size->getWidth();
$height = $size->getHeight();
$palette = null !== $color ? $color->getPalette() : new RGB();
$color = null !== $color ? $color : $palette->color('fff');
try {
$pixel = new \ImagickPixel((string) $color);
$pixel->setColorValue(\Imagick::COLOR_ALPHA, $color->getAlpha() / 100);
$imagick = new \Imagick();
$imagick->newImage($width, $height, $pixel);
$imagick->setImageMatte(true);
$imagick->setImageBackgroundColor($pixel);
if (version_compare('6.3.1', $this->getVersion($imagick)) < 0) {
$imagick->setImageOpacity($pixel->getColorValue(\Imagick::COLOR_ALPHA));
}
$pixel->clear();
$pixel->destroy();
return new Image($imagick, $palette, new MetadataBag());
} catch (\ImagickException $e) {
throw new RuntimeException('Could not create empty image', $e->getCode(), $e);
}
}