NV_STEREO_IMAGE_SIGNATURE and DirectX 10/11 (nVidia 3D Visio
本文关键字：nVidia 3D Visio DirectX IMAGE STEREO SIGNATURE and NV | 更新日期: 2023-09-27 18:08:08
我试图使用SlimDX和DirectX10或11来控制nVidia 3D Vision Kit上的立体化过程。由于这个问题，我已经能够使它在DirectX 9中工作。然而，由于一些缺失的方法，我一直无法使它在DirectX 10或11下工作。
算法是这样的:
- 渲染左眼图像
- 渲染右眼图像
- 创建一个能够包含它们的纹理加上一个额外的行(所以纹理大小将是2 *宽度，高度+ 1)
- 写入NV_STEREO_IMAGE_SIGNATURE值
- 在屏幕上渲染这个纹理
static Texture2D Make3D(Texture2D stereoTexture)
{
// stereoTexture contains a stereo image with the left eye image on the left half
// and the right eye image on the right half
// this staging texture will have an extra row to contain the stereo signature
Texture2DDescription stagingDesc = 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 staging = new Texture2D(device, stagingDesc);
// 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 = 3840 };
// Copy it to the staging texture
device.CopySubresourceRegion(stereoTexture, 0, stereoSrcBox, staging, 0, 0, 0, 0);
// Open the staging texture for reading
DataRectangle box = staging.Map(0, MapMode.Write, SlimDX.Direct3D10.MapFlags.None);
// Go to the last row
box.Data.Seek(stereoTexture.Description.Width * stereoTexture.Description.Height * 4, System.IO.SeekOrigin.Begin);
// Write the NVSTEREO header
box.Data.Write(data, 0, data.Length);
staging.Unmap(0);
// Create the final stereoized texture
Texture2DDescription finalDesc = new Texture2DDescription()
{
ArraySize = 1,
Width = 3840,
Height = 1081,
BindFlags = BindFlags.ShaderResource,
CpuAccessFlags = CpuAccessFlags.Write,
Format = SlimDX.DXGI.Format.R8G8B8A8_UNorm,
OptionFlags = ResourceOptionFlags.None,
Usage = ResourceUsage.Dynamic,
MipLevels = 1,
SampleDescription = new SampleDescription(1, 0)
};
// Copy the staging texture on a new texture to be used as a shader resource
Texture2D final = new Texture2D(device, finalDesc);
device.CopyResource(staging, final);
staging.Dispose();
return final;
}
// The NVSTEREO header.
static byte[] 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
private static Device device;
[STAThread]
static void Main()
{
// 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 = true,
OutputHandle = form.Handle,
SampleDescription = new SampleDescription(1, 0),
SwapEffect = SwapEffect.Discard,
Usage = Usage.RenderTargetOutput
};
SwapChain swapChain;
Device.CreateWithSwapChain(null, DriverType.Hardware, DeviceCreationFlags.Debug, desc, out device, out swapChain);
//Stops Alt+enter from causing fullscreen skrewiness.
Factory factory = swapChain.GetParent<Factory>();
factory.SetWindowAssociation(form.Handle, WindowAssociationFlags.IgnoreAll);
Texture2D backBuffer = Resource.FromSwapChain<Texture2D>(swapChain, 0);
RenderTargetView renderView = new RenderTargetView(device, backBuffer);
ImageLoadInformation info = new ImageLoadInformation()
{
BindFlags = BindFlags.None,
CpuAccessFlags = CpuAccessFlags.Read,
FilterFlags = FilterFlags.None,
Format = SlimDX.DXGI.Format.R8G8B8A8_UNorm,
MipFilterFlags = FilterFlags.None,
OptionFlags = ResourceOptionFlags.None,
Usage = ResourceUsage.Staging,
MipLevels = 1
};
// Make texture 3D
Texture2D sourceTexture = Texture2D.FromFile(device, "medusa.jpg", info);
Texture2D stereoizedTexture = Make3D(sourceTexture);
ShaderResourceView srv = new ShaderResourceView(device, stereoizedTexture);
// Create a quad that fills the whole screen
ushort[] idx;
TexturedVertex[] quad = CreateTexturedQuad(Vector3.Zero, 1920, 1080, out idx);
// fill vertex and index buffers
DataStream stream = new DataStream(4*24, true, true);
stream.WriteRange(quad);
stream.Position = 0;
Buffer vertices = new SlimDX.Direct3D10.Buffer(device, stream, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = 4*24,
Usage = ResourceUsage.Default
});
stream.Close();
stream = new DataStream(6*sizeof (ushort), true, true);
stream.WriteRange(idx);
stream.Position = 0;
Buffer indices = new SlimDX.Direct3D10.Buffer(device, stream, new BufferDescription()
{
BindFlags = BindFlags.IndexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = 6*sizeof (ushort),
Usage = ResourceUsage.Default
});
// Create world view (ortho) projection matrices
QuaternionCam qCam = new QuaternionCam();
// Load effect from file. It is a basic effect that renders a full screen quad through
// an ortho projectio=n matrix
Effect effect = Effect.FromFile(device, "Texture.fx", "fx_4_0", ShaderFlags.Debug, EffectFlags.None);
EffectTechnique technique = effect.GetTechniqueByIndex(0);
EffectPass pass = technique.GetPassByIndex(0);
InputLayout layout = new InputLayout(device, pass.Description.Signature, new[]
{
new InputElement("POSITION", 0,
Format.
R32G32B32A32_Float,
0, 0),
new InputElement("TEXCOORD", 0,
Format.
R32G32_Float,
16, 0)
});
effect.GetVariableByName("mWorld").AsMatrix().SetMatrix(
Matrix.Translation(Layout.OrthographicTransform(Vector2.Zero, 90, new Size(1920, 1080))));
effect.GetVariableByName("mView").AsMatrix().SetMatrix(qCam.View);
effect.GetVariableByName("mProjection").AsMatrix().SetMatrix(qCam.OrthoProjection);
effect.GetVariableByName("tDiffuse").AsResource().SetResource(srv);
// Set RT and Viewports
device.OutputMerger.SetTargets(renderView);
device.Rasterizer.SetViewports(new Viewport(0, 0, form.ClientSize.Width, form.ClientSize.Height, 0.0f, 1.0f));
// Create solid rasterizer state
RasterizerStateDescription rDesc = new RasterizerStateDescription()
{
CullMode = CullMode.None,
IsDepthClipEnabled = true,
FillMode = FillMode.Solid,
IsAntialiasedLineEnabled = true,
IsFrontCounterclockwise = true,
IsMultisampleEnabled = true
};
RasterizerState rState = RasterizerState.FromDescription(device, rDesc);
device.Rasterizer.State = rState;
// Main Loop
MessagePump.Run(form, () =>
{
device.ClearRenderTargetView(renderView, Color.Cyan);
device.InputAssembler.SetInputLayout(layout);
device.InputAssembler.SetPrimitiveTopology(PrimitiveTopology.TriangleList);
device.InputAssembler.SetVertexBuffers(0, new VertexBufferBinding(vertices, 24, 0));
device.InputAssembler.SetIndexBuffer(indices, Format.R16_UInt, 0);
for (int i = 0; i < technique.Description.PassCount; ++i)
{
// Render the full screen quad
pass.Apply();
device.DrawIndexed(6, 0, 0);
}
swapChain.Present(0, PresentFlags.None);
});
// Dispose resources
vertices.Dispose();
layout.Dispose();
effect.Dispose();
renderView.Dispose();
backBuffer.Dispose();
device.Dispose();
swapChain.Dispose();
rState.Dispose();
stereoizedTexture.Dispose();
sourceTexture.Dispose();
indices.Dispose();
srv.Dispose();
}[/code]
提前感谢!
我最终设法修复了它。关键在于使用CopySubResourceRegion方法将立体纹理返回到backbuffer，指定其尺寸(例如:1920 x 1080而不是3840 x 1081)。