php 한글 메뉴얼 도움말 검색 사이트 Get an ImagickPixelIterator for an image section [imagick.getpixelregioniterator]

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");
?>