PHP | imageantialias() Function

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The imageantialias() function is an inbuilt function in PHP which is used to check whether antialias function is used or not. This function activate the fast drawing anti-aliased methods for lines and wired polygons. It works only with truecolor images.

Syntax:

bool imageantialias( $image, $enabled )

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

$image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
$enabled: This parameter is used to check whether enable antialiasing or not.

Return Value: This function returns True on success or False on failure.

Note: The imageantialias() function is now available. It was only available if PHP was compiled against version of the GD library.

Below program illustrates the imageantialias() function.

Program 1:

<?php 
   
// Function to create image of given size 
$antialias_img = imagecreatetruecolor(800, 200); 
$normal_img = imagecreatetruecolor(400, 200); 
   
// Switch antialiasing on for one image 
imageantialias($antialias_img, true); 
   
// Allocate the color for image 
$white = imagecolorallocate($normal_img, 255, 255, 255); 
$white_anti_aliased = imagecolorallocate($antialias_img, 255, 255, 255); 
   
// Draw two lines, one with antialiasing enabled 
imageline($normal_img, 0, 0, 400, 200, $white); 
imageline($antialias_img, 0, 0, 400, 200, $white_anti_aliased); 
   
// Merge the two images side by side for output 
imagecopymerge($antialias_img, $normal_img, 400, 0, 0, 0, 400, 200, 200); 
   
// Output image 
header('Content-type: image/png'); 
   
imagepng($antialias_img); 
imagedestroy($antialias_img); 
imagedestroy($normal_img_img); 
?> 