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    Imagick::getPixelRegionIterator

    (PECL imagick 2.0.0)

    Imagick::getPixelRegionIterator — Get an ImagickPixelIterator for an image section

    설명

    ImagickPixelIterator Imagick::getPixelRegionIterator ( int $x , int $y , int $columns , int $rows )

    Get an ImagickPixelIterator for an image section.

    인수

    x

    The x-coordinate of the region.

    y

    The y-coordinate of the region.

    columns

    The width of the region.

    rows

    The height of the region.

    반환값

    Returns an ImagickPixelIterator for an image section.

    오류/예외

    오류시에 ImagickException이 발생합니다.

    예제

    Example #1 Imagick::getPixelRegionIterator() example

    Iterate over the pixels in the top left of the image, changing them to be black.

    <?php
    $im     = new Imagick(realpath("./testImage.png"));
    $areaIterator = $im->getPixelRegionIterator(0, 0, 10, 10);

    foreach (    $areaIterator as $rowIterator) {
        foreach (    $rowIterator as $pixel) {
                // Paint every pixel black
                $pixel->setColor("rgba(0, 0, 0, 0)");
        }
            $areaIterator->syncIterator();
    }
    $im->writeImage("./output.png");
    ?>

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