Imagick::setImageMatte

    (PECL imagick 2, PECL imagick 3)

    Imagick::setImageMatte — Sets the image matte channel

    Beschreibung

    public Imagick::setImageMatte(bool $matte): bool

    Sets the image matte channel. Diese Funktion ist verfügbar, wenn Imagick gegen die ImageMagick-Version 6.2.9 oder höher kompiliert wurde.

    Parameter-Liste

    matte

    True activates the matte channel and false disables it.

    Rückgabewerte

    Liefert true bei Erfolg.

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    User Contributed Notes 1 note

    up
    4
    martin at psinas dot com
    13 years ago
    I found this method is needed when creating a font / image mask, and needs to be set to false otherwise the mask won't take effect. Here is an example:

    <?php

    // Create objects
    $image = new Imagick('myImage.png');
    $watermark = new Imagick();
    $mask = new Imagick();
    $draw = new ImagickDraw();

    // Define dimensions
    $width = $image->getImageWidth();
    $height = $image->getImageHeight();

    // Create some palettes
    $watermark->newImage($width, $height, new ImagickPixel('grey30'));
    $mask->newImage($width, $height, new ImagickPixel('black'));

    // Watermark text
    $text = 'Copyright';

    // Set font properties
    $draw->setFont('Bookman-Demi');
    $draw->setFontSize(20);
    $draw->setFillColor('grey70');

    // Position text
    $draw->setGravity(Imagick::GRAVITY_SOUTHEAST);

    // Draw text on the watermark palette
    $watermark->annotateImage($draw, 10, 12, 0, $text);

    // Draw text on the mask palette
    $draw->setFillColor('white');
    $mask->annotateImage($draw, 11, 13, 0, $text);
    $mask->annotateImage($draw, 10, 12, 0, $text);
    $draw->setFillColor('black');
    $mask->annotateImage($draw, 9, 11, 0, $text);

    // This is apparently needed for the mask to work
    $mask->setImageMatte(false);

    // Apply mask to watermark
    $watermark->compositeImage($mask, Imagick::COMPOSITE_COPYOPACITY, 0, 0);

    // Overlay watermark on image
    $image->compositeImage($watermark, Imagick::COMPOSITE_DISSOLVE, 0, 0);

    // Set output image format
    $image->setImageFormat('png');

    // Output the new image
    header('Content-type: image/png');
    echo     $image;

    ?>
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