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ImagickPixelIterator::resetIterator

(PECL imagick 2, PECL imagick 3)

ImagickPixelIterator::resetIteratorResets the pixel iterator

Description

public ImagickPixelIterator::resetIterator(): bool
Warning

This function is currently not documented; only its argument list is available.

Resets the pixel iterator. Use it in conjunction with ImagickPixelIterator::getNextIteratorRow() to iterate over all the pixels in a pixel container.

Return Values

Returns true on success.

Examples

Example #1 ImagickPixelIterator::resetIterator()

<?php
function resetIterator($imagePath) {

$imagick = new \Imagick(realpath($imagePath));

$imageIterator = $imagick->getPixelIterator();

/* Loop trough pixel rows */
foreach ($imageIterator as $pixels) {
/* Loop through the pixels in the row (columns) */
foreach ($pixels as $column => $pixel) {
/** @var $pixel \ImagickPixel */
if ($column % 2) {

/* Make every second pixel 25% red*/
$pixel->setColorValue(\Imagick::COLOR_RED, 64);
}
}
/* Sync the iterator, this is important to do on each iteration */
$imageIterator->syncIterator();
}

$imageIterator->resetiterator();

/* Loop trough pixel rows */
foreach ($imageIterator as $pixels) {
/* Loop through the pixels in the row (columns) */
foreach ($pixels as $column => $pixel) {
/** @var $pixel \ImagickPixel */
if ($column % 3) {
$pixel->setColorValue(\Imagick::COLOR_BLUE, 64); /* Make every second pixel a little blue*/
//$pixel->setColor("rgba(0, 0, 128, 0)"); /* Paint every second pixel black*/
}
}
$imageIterator->syncIterator(); /* Sync the iterator, this is important to do on each iteration */
}

$imageIterator->clear();

header("Content-Type: image/jpg");
echo
$imagick;
}

?>

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