Imagick::getPixelRegionIterator

(PECL imagick 2.0.0)

Get an ImagickPixelIterator for an image section

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

Get an ImagickPixelIterator for an image section.

Parameters:

The x-coordinate of the region.

The y-coordinate of the region.

columns

The width of the region.

rows

The height of the region.

Returns:

Returns an ImagickPixelIterator for an image section.

Exception:

Throws ImagickException on error.

Examples:

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");
?>

Links:

http://php.net/manual/en/imagick.getpixelregioniterator.php

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2025-01-10 15:47:30

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