如题
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可以，就是太太太...慢了，而且对gif支持不太好。下面是代码：
3) die("不支持的图片类型！");
$im1 = $ImageFunctions[$ImageType]($_POST["ImageName"]);
$im2 = $ImageFunctions[$ImageType]($_POST["ImageName"]);
//print_r(imagecolorsforindex($im, imagecolorat($im, 10, 10)));
Sharp($im1, $im2, $_POST["Degree"]);
header("Content-type: image/png");
imagepng($im2);
imagedestroy($im1);
imagedestroy($im2);
}
?>
``````
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改了一下，省了一个$im：
function Sharp2(&$im, $degree)
{
$cnt = 0;
for ($x=imagesx($im)-1; $x>0; $x--)
for ($y=imagesy($im)-1; $y>0; $y--)
{
$clr1 = imagecolorsforindex($im, imagecolorat($im, $x-1, $y-1));
$clr2 = imagecolorsforindex($im, imagecolorat($im, $x, $y));
$r = intval($clr2["red"]+$degree*($clr2["red"]-$clr1["red"]));
$g = intval($clr2["green"]+$degree*($clr2["green"]-$clr1["green"]));
$b = intval($clr2["blue"]+$degree*($clr2["blue"]-$clr1["blue"]));
$r = min(255, max($r, 0));
$g = min(255, max($g, 0));
$b = min(255, max($b, 0));
//echo "r:$r, g:$g, b:$b
```
```
";
if (($new_clr=imagecolorexact($im, $r, $g, $b))==-1)
$new_clr = Imagecolorallocate($im, $r, $g, $b);
$cnt++;
if ($new_clr==-1) die("color allocate faile at $x, $y ($cnt).");
imagesetpixel($im, $x, $y, $new_clr);
}
}