PHP | Gmagick rollimage() Function

The Gmagick::rollimage() function is an inbuilt function in PHP which is used to roll an image.
Syntax:

Gmagick Gmagick::rollimage( $x, $y )

Parameters: This function accepts two parameters as mentioned above and described below: 

• $x: This parameter stores the value of the X offset.
• $y: This parameter stores the value of the Y offset.

Return Value: This function returns Gmagick object on success.
Errors/Exceptions: This function throws GmagickException on error.
Below programs illustrates the Gmagick::rollimage() function in PHP:
Program 1:
Input Image:

php

<?php 
  
// Create a Gmagick object 
$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png'); 
  
// Roll the image. 
$gmagick->rollimage(400, 100); 

header('Content-type: image/png'); 
  
// Output the image 
echo $gmagick; 
?> 

Output:

Program 2:

php

<?php 
   
// Create a GmagickDraw object 
$draw = new GmagickDraw(); 
  
// Create GmagickPixel object 
$strokeColor = new GmagickPixel('Red'); 
$fillColor = new GmagickPixel('Green'); 
  
// Set the color, opacity of image 
$draw->setStrokeOpacity(1); 
$draw->setStrokeColor('Red'); 
$draw->setFillColor('Green'); 
  
// Set the width and height of image 
$draw->setStrokeWidth(7); 
$draw->setFontSize(72); 
   
// Function to draw circle  
$draw->circle(250, 250, 100, 150); 
 
$gmagick = new Gmagick(); 
$gmagick->newImage(500, 500, 'White'); 
$gmagick->setImageFormat("png"); 
$gmagick->drawImage($draw); 

// Shear the image
$gmagick->rollimage(190, 190);
 
// Display the output image 
header("Content-Type: image/png"); 
echo $gmagick->getImageBlob(); 
?> 

Output:

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

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