Imagick::getPixelRegionIterator
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 →
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/imagick.getpixelregioniterator.php
