imageantialias

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

imageantialias — 锟角凤拷使锟矫匡拷锟斤拷荩锟絘ntialias锟斤拷锟斤拷锟斤拷

说锟斤拷

imageantialias ( resource $image , bool $enabled ) : bool

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锟斤拷支锟斤拷锟竭匡拷头锟斤拷

使锟矫匡拷锟斤拷莺锟酵革拷锟斤拷锟斤拷锟缴拷锟斤拷艹锟斤拷锟轿丛わ拷诘慕锟斤拷锟斤拷锟斤拷色锟斤拷锟斤拷锟窖憋拷锟斤拷色锟斤拷锟斤拷锟轿猴拷锟斤拷锟斤拷锟斤拷色使锟矫★拷缺锟斤拷 alpha 锟斤拷锟街碉拷支锟街碉拷锟铰诧拷锟斤拷锟斤拷锟斤拷锟� alpha 锟斤拷锟斤拷莘锟斤拷锟斤拷锟�

锟斤拷锟斤拷

image

锟斤拷图锟襟创斤拷锟斤拷锟斤拷(锟斤拷锟斤拷imagecreatetruecolor())锟斤拷锟截碉拷图锟斤拷锟斤拷源锟斤拷

enabled

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锟斤拷锟斤拷值

锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷

锟斤拷锟斤拷

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(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);
?>

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

注锟斤拷

Note: 锟剿猴拷锟斤拷锟斤拷锟斤拷锟斤拷 GD 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 PHP 锟芥本锟叫匡拷锟矫★拷

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