ImagickPixel::setColorValue

    (PECL imagick 2, PECL imagick 3)

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

    Опис

    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.

    Параметри

    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.

    Значення, що повертаються

    Повертає true в разі успіху.

    Приклади

    Приклад #1 Basic Imagick::setColorValue() usage

    <?php

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

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

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

    Поданий вище приклад виведе:

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

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