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