Php/docs/imagickpixel.sethsl
ImagickPixel::setHSL
(PECL imagick 2, PECL imagick 3)
ImagickPixel::setHSL — Sets the normalized HSL color
说明
public ImagickPixel::setHSL
( float $hue
, float $saturation
, float $luminosity
) : bool
Sets the color described by the ImagickPixel object using normalized values for hue, saturation and luminosity.
参数
hue- The normalized value for hue, described as a fractional arc (between 0 and 1) of the hue circle, where the zero value is red.
saturation- The normalized value for saturation, with 1 as full saturation.
luminosity- The normalized value for luminosity, on a scale from black at 0 to white at 1, with the full HS value at 0.5 luminosity.
返回值
成功时返回 true。
范例
Example #1 Use ImagickPixel::setHSL() to modify a color
<?php//Create an almost pure red color$color = new ImagickPixel('rgb(90%, 10%, 10%)');//Get it's HSL values$colorInfo = $color->getHSL();//Rotate the hue by 180 degrees$newHue = $colorInfo['hue'] + 0.5;if ($newHue > 1) { $newHue = $newHue - 1;}//Set the ImagickPixel to the new color$colorInfo = $color->setHSL($newHue, $colorInfo['saturation'], $colorInfo['luminosity']);//Check that the new color is blue/green$colorInfo = $color->getcolor();print_r($colorInfo);?>
以上例程会输出：
Array
(
[r] => 26
[g] => 230
[b] => 230
[a] => 255
)
注释
Note:
Available with ImageMagick library version 6.2.9 and higher.
