ImagickPixel::getColorValue
(No version information available, might be only in CVS)
ImagickPixel::getColorValue — Gets the normalized value of the provided color channel
說明
float ImagickPixel::getColorValue
( int $color
)
Warning
此函式目前沒有參考文件；只有引數列表。
Warning
本函式是實驗性的。這個函式的行為、名稱、和關於此函式的任何其他文件在未來PHP的發行中可能會在不通知的情況下改變。 使用此函式需自行承擔風險。
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 Imagick channel constants.
Return值
The value of the channel, as a normalized floating-point number, throwing ImagickPixelException on error.