Imagick::getPixelRegionIterator
(PECL imagick 2, PECL imagick 3)
Imagick::getPixelRegionIterator — Get an ImagickPixelIterator for an image section
Beschreibung
public Imagick::getPixelRegionIterator(
int
int
int
int
): ImagickPixelIterator
int
$x,int
$y,int
$columns,int
$rows): ImagickPixelIterator
Get an ImagickPixelIterator for an image section.
Parameter-Liste
-
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.
Rückgabewerte
Returns an ImagickPixelIterator for an image section.
Fehler/Exceptions
Wirft ImagickException bei Fehlern.
Beispiele
Beispiel #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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