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 // 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 // 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