ImagickPixelIterator::resetIterator()

(PECL imagick 2.0.0)

Resets the pixel iterator

说明

ImagickPixelIterator::resetIterator(void): bool

Warning

本函数还未编写文档，仅有参数列表。

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

返回值

成功时返回TRUE。

范例

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;
}
?>