note 84126 added to function.imagick-getpixeliterator
| From: | SebastianHerold at osu1 dot php dot net | Date: | Mon, 30 Jun 2008 08:06:20 +0000 |
| Subject: | note 84126 added to function.imagick-getpixeliterator | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-140995@lists.php.net to get a copy of this message | ||
For me it was very helpful to read a article at Mikko's blog. He showed that the PixelIterator
is not read-only, if you sync it regularly:
<?php
/* Create new object with the image */
$im = new Imagick( "strawberry.png" );
/* Get iterator */
$it = $im->getPixelIterator();
/* Loop trough pixel rows */
foreach( $it as $row => $pixels )
{
/* For every second row */
if ( $row % 2 )
{
/* Loop trough the pixels in the row (columns) */
foreach ( $pixels as $column => $pixel )
{
/* Paint every second pixel black*/
if ( $column % 2 )
{
$pixel->setColor( "black" );
}
}
}
/* Sync the iterator, this is important to do on each iteration */
$it->syncIterator();
}
/* Display the image */
header( "Content-Type: image/png" );
echo $im;
?>
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Manual Page -- http://www.php.net/manual/en/function.imagick-getpixeliterator.php
Edit -- https://master.php.net/note/edit/84126
Del: integrated -- https://master.php.net/note/delete/84126/integrated
Del: useless -- https://master.php.net/note/delete/84126/useless
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Del: non-english -- https://master.php.net/note/delete/84126/non-english
Del: in docs -- https://master.php.net/note/delete/84126/in+docs
Del: other reasons-- https://master.php.net/note/delete/84126
Reject -- https://master.php.net/note/reject/84126
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