PHP | Gmagick rollimage() Function

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

Syntax:

public 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:

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code

<?php 
    
// Create a Gmagick object 
$gmagick = new Gmagick(
    
// Roll the image. 
$gmagick->rollimage(400, 100); 
  
header('Content-type: image/png'); 
    
// Ouput the image 
echo $gmagick
?> 

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Output:

Program 2:

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<?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(); 
?> 

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Output:

Reference: http://php.net/manual/en/gmagick.rollimage.php 



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