The ImagickPixelIterator::syncIterator() function is an inbuilt function in PHP which is used to sync the pixel iterator.
Syntax:
bool ImagickPixelIterator::syncIterator( void )
Parameters:This function doesn’t accepts any parameter.
Return Value: This function returns TRUE on success.
Exceptions: This function throws ImagickException on error.
Below given programs illustrate the ImagickPixelIterator::syncIterator() function in PHP:
Program 1:
<?php // Create a new imagick object $imagick = new Imagick(); // Create a image on imagick object $imagick->newImage(800, 250, 'black'); $imageIterator = $imagick->getPixelIterator(); // Loop through rows pixel value foreach ($imageIterator as $pixels) { // Loop through the pixels in the row value foreach ($pixels as $column => $pixel) { if ($column % 11) { $pixel->setColor('yellow'); } } // Sync the iterator after each iteration $imageIterator->syncIterator(); } // Loop through pixel rows again for new color foreach ($imageIterator as $pixels) { // Loop through the pixels in the row foreach ($pixels as $column => $pixel) { if ($column % 20) { $pixel->setColor('blue'); } } // Sync the iterator after each iteration $imageIterator->syncIterator(); } // Show the output $imagick->setImageFormat('png'); header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> |
Output:
Program 2:
<?php // Create a new imagick object $imagick = new Imagick( $imageIterator = $imagick->getPixelIterator(); // Loop through pixel rows foreach ($imageIterator as $pixels) { // Loop through the pixels in the row foreach ($pixels as $column => $pixel) { // Get the current HSL $HSL = $pixel->getHSL(); // Set the HSL and change only saturation $pixel->setHSL($HSL['hue'], 2, $HSL['luminosity']); } // Sync the iterator after each iteration $imageIterator->syncIterator(); } // Show the output $imagick->setImageFormat('png'); header("Content-Type: image/png"); echo $imagick->getImageBlob(); ?> |
Output:
Reference: https://www.php.net/manual/en/imagickpixeliterator.synciterator.php
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