(PECL imagick 2.0.0)
ImagickPixel::setHSL — Sets the normalized HSL color
本函数还未编写文档，仅有参数列表。
Sets the color described by the ImagickPixel object using normalized values for hue, saturation and luminosity.
The normalized value for hue, described as a fractional arc (between 0 and 1) of the hue circle, where the zero value is red.
The normalized value for saturation, with 1 as full saturation.
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.
Returns TRUE on success.
Note:
Available with ImageMagick library version 6.2.9 and higher.