Imagick::getPixelRegionIterator
(PECL imagick 2.0.0)
Imagick::getPixelRegionIterator — Get an ImagickPixelIterator for an image section
Description
ImagickPixelIterator Imagick::getPixelRegionIterator ( int $x , int $y , int $columns , int $rows )Get an ImagickPixelIterator for an image section.
Parameters
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.
Return Values
Returns an ImagickPixelIterator for an image section.
Errors/Exceptions
Throws ImagickException on error.
Examples
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");
?>← Imagick::getPixelIterator
Imagick::getPointSize →
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