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);
?> |
Output:
Reference: http://php.net/manual/en/function.imageantialias.php