程式設計@筆記

[php]imageantialias — 是否使用抗鋸齒（antialias）功能


<?php
// Setup an anti-aliased image and a normal image
$aa = imagecreatetruecolor(400, 100);
$normal = imagecreatetruecolor(200, 100);


// Switch antialiasing on for one image
imageantialias($aa, true);


// Allocate colors
$red = imagecolorallocate($normal, 255, 0, 0);
$red_aa = imagecolorallocate($aa, 255, 0, 0);


// Draw two lines, one with AA enabled
imageline($normal, 0, 0, 200, 100, $red);
imageline($aa, 0, 0, 200, 100, $red_aa);


// Merge the two images side by side for output (AA: left, Normal: Right)
imagecopymerge($aa, $normal, 200, 0, 0, 0, 200, 100, 100);


// Output image
header('Content-type: image/png');


imagepng($aa);
imagedestroy($aa);
imagedestroy($normal);
?>