ImagickPixel::getColorValue
Gets the normalized value of the provided color channel
Description
public float ImagickPixel::getColorValue(int $color)
Parameters
-
color
-
The color to get the value of, specified as one of the Imagick color
constants. This can be one of the RGB colors, CMYK colors, alpha and
opacity e.g (Imagick::COLOR_BLUE, Imagick::COLOR_MAGENTA).
Return Values
The value of the channel, as a normalized floating-point number, throwing
ImagickPixelException on error.
Examples
Example #1 Basic Imagick::getColorValue usage
<?php
$color = new ImagickPixel('rgba(90%, 20%, 20%, 0.75)');
echo "Alpha value is ".$color->getColorValue(Imagick::COLOR_ALPHA).PHP_EOL;
echo "".PHP_EOL;
echo "Red value is ".$color->getColorValue(Imagick::COLOR_RED).PHP_EOL;
echo "Green value is ".$color->getColorValue(Imagick::COLOR_GREEN).PHP_EOL;
echo "Blue value is ".$color->getColorValue(Imagick::COLOR_BLUE).PHP_EOL;
echo "".PHP_EOL;
echo "Cyan value is ".$color->getColorValue(Imagick::COLOR_CYAN).PHP_EOL;
echo "Magenta value is ".$color->getColorValue(Imagick::COLOR_MAGENTA).PHP_EOL;
echo "Yellow value is ".$color->getColorValue(Imagick::COLOR_YELLOW).PHP_EOL;
echo "Black value is ".$color->getColorValue(Imagick::COLOR_BLACK).PHP_EOL;
?>
The above example will output:
Alpha value is 0.74999618524453
Red value is 0.90000762951095
Green value is 0.2
Blue value is 0.2
Cyan value is 0.90000762951095
Magenta value is 0.2
Yellow value is 0.2
Black value is 0