在C＃中使用DirectX11和SlimDX的Nvidia 3Dvideo
美好的一天，我正在尝试使用nvidia 3DVision和两个IP摄像头显示实时立体video。 我对DirectX完全不熟悉，但已尝试在此网站和其他网站上完成一些教程和其他问题。 现在，我正在为左眼和右眼显示两个静态位图。 一旦我的程序部分工作，这些将被我的相机中的位图取代。 这个问题NV_STEREO_IMAGE_SIGNATURE和DirectX 10/11（nVidia 3D Vision）给了我很多帮助，但我仍然在努力让我的程序正常工作。 我发现我的快门眼镜开始正常工作，但只显示右眼图像，而左眼仍为空白（鼠标光标除外）。
这是我生成立体图像的代码：
using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; using System.Drawing; using System.Drawing.Imaging; using System.IO; using SlimDX; using SlimDX.Direct3D11; using SlimDX.Windows; using SlimDX.DXGI; using Device = SlimDX.Direct3D11.Device; // Make sure we use DX11 using Resource = SlimDX.Direct3D11.Resource; namespace SlimDxTest2 { static class Program { private static Device device; // DirectX11 Device private static int Count; // Just to make sure things are being updated // The NVSTEREO header. static byte[] stereo_data = new byte[] {0x4e, 0x56, 0x33, 0x44, //NVSTEREO_IMAGE_SIGNATURE = 0x4433564e; 0x00, 0x0F, 0x00, 0x00, //Screen width * 2 = 1920*2 = 3840 = 0x00000F00; 0x38, 0x04, 0x00, 0x00, //Screen height = 1080 = 0x00000438; 0x20, 0x00, 0x00, 0x00, //dwBPP = 32 = 0x00000020; 0x02, 0x00, 0x00, 0x00}; //dwFlags = SIH_SCALE_TO_FIT = 0x00000002 [STAThread] static void Main() { Bitmap left_im = new Bitmap("Blue.png"); // Read in Bitmaps Bitmap right_im = new Bitmap("Red.png"); // Device creation var form = new RenderForm("Stereo test") { ClientSize = new Size(1920, 1080) }; var desc = new SwapChainDescription() { BufferCount = 1, ModeDescription = new ModeDescription(1920, 1080, new Rational(120, 1), Format.R8G8B8A8_UNorm), IsWindowed = false, //true, OutputHandle = form.Handle, SampleDescription = new SampleDescription(1, 0), SwapEffect = SwapEffect.Discard, Usage = Usage.RenderTargetOutput }; SwapChain swapChain; Device.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.Debug, desc, out device, out swapChain); RenderTargetView renderTarget; // create a view of our render target, which is the backbuffer of the swap chain we just created using (var resource = Resource.FromSwapChain(swapChain, 0)) renderTarget = new RenderTargetView(device, resource); var context = device.ImmediateContext; // set up a viewport var viewport = new Viewport(0.0f, 0.0f, form.ClientSize.Width, form.ClientSize.Height); context.OutputMerger.SetTargets(renderTarget); context.Rasterizer.SetViewports(viewport); // prevent DXGI handling of alt+enter, which doesn't work properly with Winforms using (var factory = swapChain.GetParent()) factory.SetWindowAssociation(form.Handle, WindowAssociationFlags.IgnoreAll); form.KeyDown += (o, e) => // handle alt+enter ourselves { if (e.Alt && e.KeyCode == Keys.Enter) swapChain.IsFullScreen = !swapChain.IsFullScreen; }; form.KeyDown += (o, e) => // Alt + X -> Exit Program { if (e.Alt && e.KeyCode == Keys.X) { form.Close(); } }; context.ClearRenderTargetView(renderTarget, Color.Green); // Fill Screen with specified colour Texture2DDescription stereoDesc = new Texture2DDescription() { ArraySize = 1, Width = 3840, Height = 1081, BindFlags = BindFlags.None, CpuAccessFlags = CpuAccessFlags.Write, Format = SlimDX.DXGI.Format.R8G8B8A8_UNorm, OptionFlags = ResourceOptionFlags.None, Usage = ResourceUsage.Staging, MipLevels = 1, SampleDescription = new SampleDescription(1, 0) }; // Main Loop MessagePump.Run(form, () => { Texture2D texture_stereo = Make3D(left_im, right_im); // Create Texture from two bitmaps in memory ResourceRegion stereoSrcBox = new ResourceRegion { Front = 0, Back = 1, Top = 0, Bottom = 1080, Left = 0, Right = 1920 }; context.CopySubresourceRegion(texture_stereo, 0, stereoSrcBox, renderTarget.Resource, 0, 0, 0, 0); texture_stereo.Dispose(); swapChain.Present(0, PresentFlags.None); }); // Dispose resources swapChain.IsFullScreen = false; // Required before swapchain dispose device.Dispose(); swapChain.Dispose(); renderTarget.Dispose(); } static Texture2D Make3D(Bitmap leftBmp, Bitmap rightBmp) { var context = device.ImmediateContext; Bitmap left2 = leftBmp.Clone(new RectangleF(0, 0, leftBmp.Width, leftBmp.Height), PixelFormat.Format32bppArgb); // Change bmp to 32bit ARGB Bitmap right2 = rightBmp.Clone(new RectangleF(0, 0, rightBmp.Width, rightBmp.Height), PixelFormat.Format32bppArgb); // Show FrameCount on screen: (To test) Graphics left_graph = Graphics.FromImage(left2); left_graph.DrawString("Frame: " + Count.ToString(), new System.Drawing.Font("Arial", 16), Brushes.Black, new PointF(100, 100)); left_graph.Dispose(); Graphics right_graph = Graphics.FromImage(right2); right_graph.DrawString("Frame: " + Count.ToString(), new System.Drawing.Font("Arial", 16), Brushes.Black, new PointF(200, 200)); right_graph.Dispose(); Count++; Texture2DDescription desc2d = new Texture2DDescription() { ArraySize = 1, Width = 1920, Height = 1080, BindFlags = BindFlags.None, CpuAccessFlags = CpuAccessFlags.Write, Format = SlimDX.DXGI.Format.R8G8B8A8_UNorm, OptionFlags = ResourceOptionFlags.None, Usage = ResourceUsage.Staging, MipLevels = 1, SampleDescription = new SampleDescription(1, 0) }; Texture2D leftText2 = new Texture2D(device, desc2d); // Texture2D for each bmp Texture2D rightText2 = new Texture2D(device, desc2d); Rectangle rect = new Rectangle(0, 0, left2.Width, left2.Height); BitmapData leftData = left2.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb); IntPtr left_ptr = leftData.Scan0; int left_num_bytes = Math.Abs(leftData.Stride) * leftData.Height; byte[] left_bytes = new byte[left_num_bytes]; byte[] left_bytes2 = new byte[left_num_bytes]; System.Runtime.InteropServices.Marshal.Copy(left_ptr, left_bytes, 0, left_num_bytes); // Get Byte array from bitmap left2.UnlockBits(leftData); DataBox box1 = context.MapSubresource(leftText2, 0, MapMode.Write, SlimDX.Direct3D11.MapFlags.None); box1.Data.Write(left_bytes, 0, left_bytes.Length); context.UnmapSubresource(leftText2, 0); BitmapData rightData = right2.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb); IntPtr right_ptr = rightData.Scan0; int right_num_bytes = Math.Abs(rightData.Stride) * rightData.Height; byte[] right_bytes = new byte[right_num_bytes]; System.Runtime.InteropServices.Marshal.Copy(right_ptr, right_bytes, 0, right_num_bytes); // Get Byte array from bitmap right2.UnlockBits(rightData); DataBox box2 = context.MapSubresource(rightText2, 0, MapMode.Write, SlimDX.Direct3D11.MapFlags.None); box2.Data.Write(right_bytes, 0, right_bytes.Length); context.UnmapSubresource(rightText2, 0); Texture2DDescription stereoDesc = new Texture2DDescription() { ArraySize = 1, Width = 3840, Height = 1081, BindFlags = BindFlags.None, CpuAccessFlags = CpuAccessFlags.Write, Format = SlimDX.DXGI.Format.R8G8B8A8_UNorm, OptionFlags = ResourceOptionFlags.None, Usage = ResourceUsage.Staging, MipLevels = 1, SampleDescription = new SampleDescription(1, 0) }; Texture2D stereoTexture = new Texture2D(device, stereoDesc); // Texture2D to contain stereo images and Nvidia 3DVision Signature // Identify the source texture region to copy (all of it) ResourceRegion stereoSrcBox = new ResourceRegion { Front = 0, Back = 1, Top = 0, Bottom = 1080, Left = 0, Right = 1920 }; // Copy it to the stereo texture context.CopySubresourceRegion(leftText2, 0, stereoSrcBox, stereoTexture, 0, 0, 0, 0); context.CopySubresourceRegion(rightText2, 0, stereoSrcBox, stereoTexture, 0, 1920, 0, 0); // Offset by 1920 pixels // Open the staging texture for reading and go to last row DataBox box = context.MapSubresource(stereoTexture, 0, MapMode.Write, SlimDX.Direct3D11.MapFlags.None); box.Data.Seek(stereoTexture.Description.Width * (stereoTexture.Description.Height - 1) * 4, System.IO.SeekOrigin.Begin); box.Data.Write(stereo_data, 0, stereo_data.Length); // Write the NVSTEREO header context.UnmapSubresource(stereoTexture, 0); left2.Dispose(); leftText2.Dispose(); right2.Dispose(); rightText2.Dispose(); return stereoTexture; } } }
我已经尝试了各种方法将立体图像的Texture2D复制到后备缓冲区，包括签名（3840×1081），但我尝试过的方法都没有显示两个图像……任何帮助或评论都会非常感激，Ryan
如果使用DirectX11.1是一种选择，则可以更轻松地启用立体function，而无需依赖nVidia的字节魔法。 基本上，你创建一个SwapChan1而不是常规的SwapChain ，然后就像将Stereo设置为True一样简单。
看看我发的这篇文章 ，它会告诉你如何创建一个Stereo swapChain。 代码是移植到MS自己的立体声样本的C＃。 然后你将有两个渲染目标，它更简单。 在渲染之前，您必须：
void RenderEye(bool rightEye, ITarget target) { RenderTargetView currentTarget = rightEye ? target.RenderTargetViewRight : target.RenderTargetView; context.OutputMerger.SetTargets(target.DepthStencilView, currentTarget); [clean color/depth] [render scene] [repeat for each eye] }
其中ITarget是一个类的接口，提供对backbuffer，rendertargets等的访问。就是这样，DirectX将处理所有事情。 希望这可以帮助。
尝试创建宽度= 1920而不是3840的backbufer。将每个图像拉伸到宽度的一半并将它们并排放置。
我记得在几天前在Nvidia开发者论坛上搜索时看到了同样的问题。 不幸的是，由于最近的黑客攻击，论坛失败了。 我记得该线程上的OP能够使用签名黑客使用DX11和Slimdx。 你不使用stretchRectangle方法，它就像createResuroseRegion（），但不是我记不起来的。 可能是这些方法CopyResource（）或CopySubresourceRegion（）在堆栈上的这个类似线程中找到了流。 将纹理复制到纹理
您是连续渲染图像还是至少渲染几次？ 我在DX9中做了同样的事情，并且在驾驶员将其识别为3D视觉之前必须告诉DX渲染3帧。 你的眼镜开了吗？ 你的后备缓冲区=（宽度* 2），（高度+ 1）你是否正在编写后备缓冲区：
_________________________ | | | | img1 | img2 | | | | -------------------------- |_______signature________| where this last row = 1 pix tall