一般如何弄图片 保证图片不失真
一般怎么弄图片 保证图片不失真
打水印 缩略图
如果是png图片 图片会失真
一般怎么解决
如果是bmp 图片
没有 imagecreatefrombmp 相关的函数 怎么处理bmp这类的图片了???
求指教...................
------解决方案--------------------
真彩方式图片可使失真最小
一点不失真是不可能的,除非是原大
bmp 不是网页图片,所以 php gd 不支持
但网上能找到 php 的 bmp 处理代码
------解决方案--------------------
imagecreatetruecolor()
imagealphablending()
$color = imagecolorallocatealpha()
imageCopy()

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