Imagick::tintImage

(PECL imagick 2, PECL imagick 3)

Imagick::tintImage — Applies a color vector to each pixel in the image

说明

public Imagick::tintImage(mixed $tint, mixed $opacity, bool $legacy = false): bool

Applies a color vector to each pixel in the image. The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighing function is f(x)=(1-(4.0*((x-0.5)*(x-0.5)))).

参数

tint
opacity

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

更新日志

版本	说明
PECL imagick 2.1.0	Now allows a string representing the color as the first parameter and a float representing the opacity value as the second parameter. Previous versions allow only an ImagickPixel objects.

示例

示例 #1 Imagick::tintImage()

<?php
function tintImage($r, $g, $b, $a) {
    $a = $a / 100;

    $imagick = new \Imagick();
    $imagick->newPseudoImage(400, 400, 'gradient:black-white');

    $tint = new \ImagickPixel("rgb($r, $g, $b)");
    $opacity = new \ImagickPixel("rgb(128, 128, 128, $a)");
    $imagick->tintImage($tint, $opacity);
    $imagick->setImageFormat('png');
    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>