GmagickPixel::getcolorvalue
(PECL gmagick >= Unknown)
GmagickPixel::getcolorvalue — Gets the normalized value of the provided color channel
说明
public
GmagickPixel::getcolorvalue (
int
$color ) :
float
Retrieves the value of the color channel specified, as a floating-point number between 0 and 1.
参数
-
color -
The channel to check, specified as one of the Gmagick channel constants.
返回值
The value of the channel, as a normalized floating-point number, throwing GmagickPixelException on error.
