php缩放gif和png图透明背景变成黑色的解决方法
php缩放gif和png图透明背景变成黑色的解决方法
工作中需要缩放一些gif图然后在去Imagecopymerge,可是发现使用了imagecreatetruecolor和imagecopyresampled后发现背景图不对,本来透明的背景图变成了黑色,后来发现做一些修改才可以:
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$img = imagecreatetruecolor(200, 200); //2.上色 $color=imagecolorallocate($img,255,255,255); //3.设置透明 imagecolortransparent($img,$color); imagefill($img,0,0,$color); |
然后再进行imagecopyresampled和Imagecopymerge就没有问题了

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