Question

我正在尝试使用IDXGISwapChain.Present库和Direct3DHook来关联Directx11 EasyHook以获取屏幕截图。我想Direct3DHook是为单屏幕截图编写的，我试图扩展它以获得截屏流。在前几个屏幕截图之后，主机应用程序在随机渲染堆栈中获得异常。

我可以将错误隔离到文件DXHookD3D11.cs中的以下代码：

using (MemoryStream ms = new MemoryStream())
{
    // This line crashes the main program, removing this makes the program not crash               
    res = Texture2D.ToStream(textureDest.Device.ImmediateContext, textureDest, ImageFileFormat.Bmp, ms).Code;
    if (res != 0)
    {
        // this debugmessage never gets printed
        this.DebugMessage("PresentHook: ERror in Tostream " + res.ToString());
    }
    .......                                    
}

Answer 1

我想我发现了错误。 Direct3DHook使用线程池来运行上面的代码。

ThreadPool.QueueUserWorkItem(delegate


                            {

                                
                               using (MemoryStream ms = new MemoryStream())


                                {


                                    Texture2D.ToStream(textureDest.Device.ImmediateContext, textureDest, ImageFileFormat.Bmp, ms);

                                    SendResponse(ms, requestId);


                                    this.DebugMessage("PresentHook: Send response time: " + (DateTime.Now - startSendResponse).ToString());


                                 }


                                 // Free the textureDest as we no longer need it.


                                textureDest.Dispose();


                                 textureDest = null;


                             });

但是Texture.ToStream调用需要是单线程的，因为在内部它可能会发出单线程的GetRenderTarget调用，如果两个调用是异步启动的话会导致异常。我删除了ThreadPool调用，它运行正常。

将Direct2D纹理转换为内存流会使应用程序崩溃

1 个答案: