Imagick::transparentPaintImage

(PECL imagick 2 >= 2.3.0, PECL imagick 3)

Imagick::transparentPaintImage — Paints pixels transparent

Descrizione

public Imagick::transparentPaintImage(
    mixed $target,
    float $alpha,
    float $fuzz,
    bool $invert
): bool

Paints pixels matching the target color transparent. Questo metodo è disponibile se Imagick è stato compilato con ImageMagick versione 6.3.8 o successive.

Elenco dei parametri

target: The target color to paint
alpha: The level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.
fuzz: The amount of fuzz. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.
invert: If true paints any pixel that does not match the target color.

Valori restituiti

Restituisce true in caso di successo.

Esempi

Example #1 Imagick::transparentPaintImage()

<?php
function transparentPaintImage($color, $alpha, $fuzz) {
    $imagick = new \Imagick(realpath("images/BlueScreen.jpg"));

    //Need to be in a format that supports transparency
    $imagick->setimageformat('png');

    $imagick->transparentPaintImage(
        $color, $alpha, $fuzz * \Imagick::getQuantum(), false
    );

    //Not required, but helps tidy up left over pixels
    $imagick->despeckleimage();

    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>

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