/**
* {@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);
}
}
/**
* 创建一个纯色图片
* @param $width
* @param $height
* @param $color
* @param $alpha (透明度 0-100) 0为透明
* @return object
*/
public function create($width, $height, $color = '#ffffff', $alpha = 100)
{
if (!empty($color) && is_string($color)) {
$palette = new RGB();
$color = $palette->color(ltrim($color, '#'), $alpha);
}
return $this->imagine->create(new Box($width, $height), $color);
}
/**
* {@inheritdoc}
*/
public function grayscale()
{
$gray = min(255, round(0.299 * $this->getRed() + 0.114 * $this->getBlue() + 0.587 * $this->getGreen()));
return $this->palette->color(array($gray, $gray, $gray), $this->alpha);
}
