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GmagickPixel::getcolorvalue

(PECL gmagick >= Unknown)

GmagickPixel::getcolorvalue — Gets the normalized value of the provided color channel

說(shuō)明

public GmagickPixel::getcolorvalue(int $color): float

Retrieves the value of the color channel specified, as a floating-point number between 0 and 1.

參數

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.

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