如何在 Unity for Android 中将 System.IO.Stream 转换为纹理?

How to convert System.IO.Stream into a Texture in Unity for Android?(如何在 Unity for Android 中将 System.IO.Stream 转换为纹理?)

问题描述

我正在 Unity 中构建客户端 Android 应用程序，当它从 AWS S3 服务器下载 jpg 时，结果以 System.IO.Stream 的形式返回.

I'm building a client-side Android app in Unity, and when it downloads a jpg from an AWS S3 server, the result comes back as a System.IO.Stream.

但是，我对 Mono 和 .Net 的了解有限，这意味着我正在努力弄清楚如何将 System.IO.Stream 数据块转换为 Unity 中的纹理，然后我可以在场景中的四边形上进行设置.

However my limited knowledge of Mono and .Net means that I'm struggling to figure out how to turn this System.IO.Stream blob of data into a Texture in Unity, that I can then set on a quad in my scene.

我在网上看到了一些很有前途的代码示例，例如:var img = Bitmap.FromStream(stream);但据我所知，Unity for Android 不支持 System.Drawing.Bitmap - 有人有什么建议吗?

I've seen promising examples of code online like: var img = Bitmap.FromStream(stream); yet System.Drawing.Bitmap is not supported in Unity for Android as far as I can tell - does anyone have any suggestions?

提前致谢！

(我用来从 AWS S3 下载的确切示例代码是 GetObject() 函数，可以在此处找到 http://docs.aws.amazon.com/mobile/sdkforunity/developerguide/s3.html，但在他们的示例中，他们使用 System.IO.StreamReader仅适用于读取文本而不是图像的字节数据)

(The exact example code I'm using to download from AWS S3 is the GetObject() function that can be found here http://docs.aws.amazon.com/mobile/sdkforunity/developerguide/s3.html, but in their example they use a System.IO.StreamReader which only works with reading in text not byte data for images)

推荐答案

您正在寻找 LoadImage 函数来自 Texture2D 类.该函数将PNG/JPG图像字节数组转换为纹理.

You are looking for the LoadImage function from the Texture2D class. This function converts PNG/JPG image byte array into a texture.

Texture2D tex = new Texture2D(2, 2);
tex.LoadImage(stream);

stream 变量必须是来自互联网/AWS S3 服务的字节数组(byte[]).

The stream variable must be byte array(byte[]) from the internet / AWS S3 serve.

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