Go标准库中是否有一个函数可以将缓冲区编码为go中的任何图像格式

问题描述：

I'm writing a micro-service with some simple image manipulation in go.

When I come to sending the manipulated image back to the user I have to encode it correctly before writing it via a buffer.

I can detect the format easily enough, so it's not precisely a problem. Currently I use my format string and do it like this:

buffer := new(bytes.Buffer)

switch format { //format is just a string as returned by image.Decode()
case "jpeg":
    err := jpeg.Encode(buffer, img, nil) //img is just an image.Image 
    if err != nil {
        //Do some error handling
    }
case "png":
    err := png.Encode(buffer, img)
    if err != nil {
        //Do some error handling
    }
//and so on...

Now this works just fine, I was about to split it out into my own function when I started to think I must have missed something here. It seems too obvious to not have a function like image.Encode(buffer, image, format).

It's not exactly hassle to write it, but my code will soon become unnecessarily unwieldy if I start re-implementing core language functionality.

If it's just not there because go is a nice tidy language with a small footprint, I'm cool with that.

我正在编写带有一些简单图像处理功能的微服务。 p>

当我将经过处理的图像发送回用户时，必须先对其进行正确编码，然后再通过缓冲区写入。 p>

我可以检测到格式很容易，所以这不是问题。当前，我使用我的格式字符串，并按以下方式进行操作： p>

  buffer：= new（bytes.Buffer）
 
switch format {//格式只是返回的字符串 通过image.Decode（）
case“ jpeg”：
 err：= jpeg.Encode（buffer，img，nil）// img只是一幅图像。Image
 if err！= nil {
 //做一些 错误处理
} 
case“ png”：
 err：= png.Encode（buffer，img）
 if err！= nil {
 //进行一些错误处理
} 
 //依此类推 ... 
  code>  pre> 
 
 现在这很好用，当我开始认为自己一定错过了某些东西时，我打算将其拆分为自己的函数。 似乎太明显了，没有像 image.Encode（buffer，image，format） code>这样的功能。 p> 
 
 
编写它并不是很麻烦，但是我的代码 如果我开始重新实现核心语言功能，将很快变得不必要地麻烦。 p> 
 
 

如果因为go语言是一种不错的，整洁的，占地少的语言而没有使用，那我就很酷。   p> 
  div>

答

The standard library does not contain a function for encoding an image to an arbitrary format.

One reason that the library does not have such a function is that there are different encoding options for each image format. For example the JPEG options and PNG options are different.

Go标准库中是否有一个函数可以将缓冲区编码为go中的任何图像格式

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