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ImagickPixel::setColorValue

(PECL imagick 2, PECL imagick 3)

ImagickPixel::setColorValue — Sets the normalized value of one of the channels

Beschreibung

public ImagickPixel::setColorValue(int $color, float $value): bool

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.

Parameter-Liste

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.

Rückgabewerte

Liefert true bei Erfolg.

Beispiele

Beispiel #1 Basic Imagick::setColorValue() usage

<?php

$color = new \ImagickPixel('firebrick');

$color->setColorValue(Imagick::COLOR_ALPHA, 0.5);

print_r($color->getcolor(true));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Array
(
    [r] => 0.69803921568627
    [g] => 0.13333333333333
    [b] => 0.13333333333333
    [a] => 0.50000762951095
)