(PECL imagick 2.0.0)
Sets the normalized value of one of the channels
bool ImagickPixel::setColorValue ( int $color, float $value )
Sets the value of the specified channel of this object to the provided value, which should be between 0 and 1. This function can be used to provide an opacity channel to an ImagickPixel object.
Parameters:
color
One of the Imagick color constants e.g. \Imagick::COLOR_GREEN or \Imagick::COLOR_ALPHA.
value
The value to set this channel to, ranging from 0 to 1.
Returns:
Returns TRUE on success.
Examples:
Basic Imagick::setColorValue() usage
<?php
$color = new \ImagickPixel('firebrick');
$color->setColorValue(Imagick::COLOR_ALPHA, 0.5);
print_r($color->getcolor(true));
?>
The above example will output:
Array
(
[r] => 0.69803921568627
[g] => 0.13333333333333
[b] => 0.13333333333333
[a] => 0.50000762951095
)
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