The ImagickPixel::setIndex() function is an inbuilt function in PHP which is used to set the colormap index of the pixel.
Syntax:
bool ImagickPixel::setIndex( int $index )
Parameters: This function accepts a single parameter $index which holds the index to be set.
Return Value: This function returns TRUE on success.
Below programs illustrate the ImagickPixel::setIndex() function in PHP:
Program 1: This program set and return the index for a single pixel.
<?php   // Create a new imagickPixel object $imagickPixel = new ImagickPixel();   // Set the index $imagickPixel->setIndex(15);   // Get the index $index = $imagickPixel->getIndex(); echo $index; ?> |
Output:
15
Program 2: This program returns the index value of an image.
<?php   // Create a new imagick object $imagick = new Imagick(   // Get the pixel iterator to iterate through each pixel $imageIterator = $imagick->getPixelIterator();   $i = 0;   // Loop through pixel rows foreach ($imageIterator as $row => $pixels) {       foreach ($pixels as $column => $pixel) {           // Set the index         $pixel->setIndex($i);         echo $pixel->getIndex() . '<br>';         $i++;     }       // Sync the iterator after each iteration     $imageIterator->syncIterator(); } ?> |
Output:
0 1 2 3 . . .
Reference: https://www.php.net/manual/en/imagickpixel.setindex.php
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