update : 2015.11.03
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Should antialias functions be used or not

imageantialias

(PHP 4 >= 4.3.2, PHP 5, PHP 7)

imageantialiasShould antialias functions be used or not

설명

bool imageantialias ( resource $image , bool $enabled )

Activate the fast drawing antialiased methods for lines and wired polygons. It does not support alpha components. It works using a direct blend operation. It works only with truecolor images.

Thickness and styled are not supported.

Using antialiased primitives with transparent background color can end with some unexpected results. The blend method uses the background color as any other colors. The lack of alpha component support does not allow an alpha based antialiasing method.

인수

image

imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.

enabled

Whether to enable antialiasing or not.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

Example #1 A comparison of two lines, one with anti-aliasing switched on

<?php
// Setup an anti-aliased image and a normal image
$aa imagecreatetruecolor(400100);
$normal imagecreatetruecolor(200100);

// Switch antialiasing on for one image
imageantialias($aatrue);

// Allocate colors
$red imagecolorallocate($normal25500);
$red_aa imagecolorallocate($aa25500);

// Draw two lines, one with AA enabled
imageline($normal00200100$red);
imageline($aa00200100$red_aa);

// Merge the two images side by side for output (AA: left, Normal: Right)
imagecopymerge($aa$normal200000200100100);

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

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

위 예제의 출력 예시:

Output of example : A comparison of two lines, one with anti-aliasing switched on

주의

참고