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PHP | Gmagick cyclecolormapimage() Function

  • Last Updated : 21 Jan, 2020

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.


Gmagick Gmagick::cyclecolormapimage( int $displace )

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

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


Program 2:

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



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