Unity3D调用C++库执行图像处理时，需要快速传递Texture2D纹理像素数据块，获取数据块C++指针(C#中用IntPtr表示)
代码如下文章来源：https://www.toymoban.com/news/detail-557756.html
/*
* 对象转为指针
* */
public System.IntPtr GetIntPtr<T>(T obj)
{
System.Runtime.InteropServices.GCHandle handle = default(GCHandle);
try
{
handle = System.Runtime.InteropServices.GCHandle.Alloc(obj, System.Runtime.InteropServices.GCHandleType.Pinned);
return handle.AddrOfPinnedObject();
}
finally
{
if (handle != default(System.Runtime.InteropServices.GCHandle))
{
handle.Free();
}
}
}
案例文章来源地址https://www.toymoban.com/news/detail-557756.html
RenderTexture saveRT = RenderTexture.active;
RenderTexture.active = renderTexture;
sampleTexture.ReadPixels(new Rect(0, 0, sampleTexture.width, sampleTexture.height), 0, 0);
RenderTexture.active = saveRT;
sampleTexture.Apply();
Color32[] colors = sampleTexture.GetPixels32();
SendFrame32(GetIntPtr(colors), sampleTexture.width, sampleTexture.height, 0);
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