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PHP | Gmagick cyclecolormapimage() Function

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  • Last Updated : 21 Jun, 2022
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The Gmagick::cyclecolormapimage() function is an inbuilt function in PHP which is used to displace an image colormap by a given number of positions. If you cycle the colormap a number of times you can produce a psychedelic effect. 

Syntax:

Gmagick Gmagick::cyclecolormapimage( int $displace )

Parameters: This function accepts a single parameter $displace which holds the displacement. 

Return Value: This function returns Gmagick object on success. 

Exceptions: This function throws GmagickException on error. 

Below given programs illustrate the Gmagick::cyclecolormapimage() function in PHP: 

Used Image:

  

Program 1: 

php




<?php
 
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
 
// Apply the cyclecolormapimage() function
$gmagick->cyclecolormapimage(2);
 
// Output the image to browser
header('Content-type: image/png'); 
echo $gmagick
?> 


Output:

  

Program 2: 

php




<?php
 
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
 
// Create a GmagickDraw object
$draw = new GmagickDraw();
 
// Set the color
$draw->setFillColor('white');
 
// Function to draw rectangle
$draw->rectangle(0, 0, 800, 400);
 
// Set the fill color
$draw->setFillColor('red');
 
// Set the font size
$draw->setfontsize(50);
 
// Annotate a text
$draw->annotate(30, 100, 'GeeksforGeeks');
 
// Use of drawimage function
$gmagick->drawImage($draw);
 
// Apply the cyclecolormapimage() function
$gmagick->cyclecolormapimage(1);
 
// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>


Output:

  

Reference: https://www.php.net/manual/en/gmagick.cyclecolormapimage.php


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