imageantialias() is an inbuilt function in PHP that is used to check whether antialias function is used or not. It activates the fast drawing anti-aliased methods for lines and wired polygons. It works only with true-color images and it doesn't support alpha components.
Syntax
bool imageantialias($image, $enabled)
Parameters
imageantialias() takes two parameters: $image and $enabled.
$image − The $image parameter is a GdImage object and an image resource that is returned by the image creation function imagecreatetruecolor.
$enabled − The $enabled parameter is used to check whether antialiasing is enabled or not
Return Values
imageantialias() returns True on success and False on failure.
Example 1
<?php // Setup an anti-aliased image and a normal image $img = imagecreatetruecolor(700, 300); $normal = imagecreatetruecolor(700, 300); // Switch antialiasing on for one image imageantialias($img, true); // Allocate colors $blue = imagecolorallocate($normal, 0, 0, 255); $blue_aa = imagecolorallocate($img, 0, 0, 255); // Draw two lines, one with AA enabled imageline($normal, 0, 0, 400, 200, $blue); imageline($img, 0, 0, 400, 200, $blue_aa); // Merge the two images side by side for output (AA: left, Normal: Right) imagecopymerge($img, $normal, 400, 0, 0, 0, 400, 200, 200); // Output image header('Content-type: image/png'); imagepng($img); imagedestroy($img); imagedestroy($normal); ?>