我不知道为什么我的代码不会使红色矩形出现在绿色背景上。
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
/////////////////////////////////////////////////////// PLEASE READ! ///////////////////////////////////////////////////
// This provides a basic example of using our Direct3D 11 bindings in their current form. These bindings are still //
// improving over time, and as a result the content of this example may change. //
// Notably: //
// TODO remove Unsafe.NullRef once we've updated the bindings to not require it //
// TODO investigate making the D3DPrimitiveTopology enum more user friendly //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
using System.Text;
using System.Runtime.CompilerServices;
using Silk.NET.Core.Native;
using Silk.NET.Direct3D.Compilers;
using Silk.NET.Direct3D11;
using Silk.NET.DXGI;
using Silk.NET.Input;
using Silk.NET.Maths;
using Silk.NET.Windowing;
using SilkNetTest3;
var backgroundColour = new[] { 0.0f, 1.0f, 0.0f, 1.0f };
var shapeColor = new Vector4D<float>(1, 0, 0, 1);
VertexPositionColor[] vertices =
[
new VertexPositionColor(new Vector2D<float>(0.5f, 0.5f), shapeColor),
new VertexPositionColor(new Vector2D<float>(0.5f, -0.5f), shapeColor),
new VertexPositionColor(new Vector2D<float>(-0.5f, -0.5f), shapeColor),
new VertexPositionColor(new Vector2D<float>(-0.5f, 0.5f), shapeColor)
];
uint[] indices =
[
0, 1, 3,
1, 2, 3
];
// Create a window.
var options = WindowOptions.Default;
options.Size = new Vector2D<int>(800, 600);
options.Title = "Learn Direct3D11 with Silk.NET";
options.API = GraphicsAPI.None; // <-- This bit is important, as your window will be configured for OpenGL by default.
var window = Window.Create(options);
// Load the DXGI and Direct3D11 libraries for later use.
// Given this is not tied to the window, this doesn't need to be done in the OnLoad event.
DXGI dxgi = null!;
D3D11 d3d11 = null!;
D3DCompiler compiler = null!;
// These variables are initialized within the Load event.
ComPtr<IDXGIFactory2> factory = default;
ComPtr<IDXGISwapChain1> swapchain = default;
ComPtr<ID3D11Device> device = default;
ComPtr<ID3D11DeviceContext> deviceContext = default;
ComPtr<ID3D11Buffer> vertexBuffer = default;
ComPtr<ID3D11Buffer> indexBuffer = default;
ComPtr<ID3D11VertexShader> vertexShader = default;
ComPtr<ID3D11PixelShader> pixelShader = default;
ComPtr<ID3D11InputLayout> inputLayout = default;
//ComPtr<ID3D11Texture2D> renderTexture = default;
//ComPtr<ID3D11RenderTargetView> renderTextureRTV = default;
//ComPtr<ID3D11ShaderResourceView> renderTextureSRV = default;
BasicShaders basicShaders = null;
// Assign events.
window.Load += OnLoad;
window.Update += OnUpdate;
window.Render += OnRender;
window.FramebufferResize += OnFramebufferResize;
// Run the window.
window.Run();
// Clean up any resources.
factory.Dispose();
swapchain.Dispose();
device.Dispose();
deviceContext.Dispose();
vertexBuffer.Dispose();
indexBuffer.Dispose();
vertexShader.Dispose();
pixelShader.Dispose();
inputLayout.Dispose();
compiler.Dispose();
d3d11.Dispose();
dxgi.Dispose();
//dispose the window, and its internal resources
window.Dispose();
unsafe void OnLoad()
{
//Whether or not to force use of DXVK on platforms where native DirectX implementations are available
const bool forceDxvk = false;
dxgi = DXGI.GetApi(window, forceDxvk);
d3d11 = D3D11.GetApi(window, forceDxvk);
compiler = D3DCompiler.GetApi();
// Set-up input context.
var input = window.CreateInput();
foreach (var keyboard in input.Keyboards)
{
keyboard.KeyDown += OnKeyDown;
}
// Create our D3D11 logical device.
SilkMarshal.ThrowHResult
(
d3d11.CreateDevice
(
default(ComPtr<IDXGIAdapter>),
D3DDriverType.Hardware,
Software: default,
(uint)CreateDeviceFlag.Debug,
null,
0,
D3D11.SdkVersion,
ref device,
null,
ref deviceContext
)
);
//This is not supported under DXVK
//TODO: PR a stub into DXVK for this maybe?
if (OperatingSystem.IsWindows())
{
// Log debug messages for this device (given that we've enabled the debug flag). Don't do this in release code!
device.SetInfoQueueCallback(msg => Console.WriteLine(SilkMarshal.PtrToString((nint)msg.PDescription)));
}
// Create our swapchain.
var swapChainDesc = new SwapChainDesc1
{
BufferCount = 2, // double buffered
Format = Format.FormatB8G8R8A8Unorm,
BufferUsage = DXGI.UsageRenderTargetOutput,
SwapEffect = SwapEffect.FlipDiscard,
SampleDesc = new SampleDesc(1, 0)
};
// Create our DXGI factory to allow us to create a swapchain.
factory = dxgi.CreateDXGIFactory<IDXGIFactory2>();
// Create the swapchain.
SilkMarshal.ThrowHResult
(
factory.CreateSwapChainForHwnd
(
device,
window.Native!.DXHandle!.Value,
in swapChainDesc,
null,
ref Unsafe.NullRef<IDXGIOutput>(),
ref swapchain
)
);
// ==============>
vertexBuffer = BufferHelper.Create(device, vertices.Length * sizeof(VertexPositionColor), BindFlag.VertexBuffer, 0);
indexBuffer = BufferHelper.Create(device, indices.Length * sizeof(uint), BindFlag.IndexBuffer, 0);
// Load shaders
basicShaders = new BasicShaders();
basicShaders.Load(device);
// ===============>
// Define rasterizer
var rsDesc = new RasterizerDesc()
{
FillMode = FillMode.Solid,
CullMode = CullMode.None,
FrontCounterClockwise = false,
DepthBias = 0,
DepthBiasClamp = 0,
SlopeScaledDepthBias = 0,
DepthClipEnable = false,
// ScissorEnable = true require defining of scissors
ScissorEnable = false,
MultisampleEnable = true,
AntialiasedLineEnable = true,
};
// Create Rasterizer
ComPtr<ID3D11RasterizerState> rs = default;
SilkMarshal.ThrowHResult(device.CreateRasterizerState(rsDesc, ref rs));
// Set Rasterizer State
deviceContext.RSSetState(rs);
}
void OnUpdate(double deltaSeconds)
{
// Here all of the updates to program state ahead of rendering (e.g. physics) should be done. We don't have anything
// to do here at the moment, so we've left it blank.
}
unsafe void OnFramebufferResize(Vector2D<int> newSize)
{
// If the window resizes, we need to be sure to update the swapchain's back buffers.
SilkMarshal.ThrowHResult
(
swapchain.ResizeBuffers(0, (uint)newSize.X, (uint)newSize.Y, Format.FormatB8G8R8A8Unorm, 0)
);
}
unsafe void OnRender(double deltaSeconds)
{
// Obtain the framebuffer for the swapchain's backbuffer.
using var framebuffer = swapchain.GetBuffer<ID3D11Texture2D>(0);
// Create a view over the render target.
ComPtr<ID3D11RenderTargetView> renderTargetView = default;
SilkMarshal.ThrowHResult(device.CreateRenderTargetView(framebuffer, null, ref renderTargetView));
// Clear the render target to be all black ahead of rendering.
deviceContext.ClearRenderTargetView(renderTargetView, ref backgroundColour[0]);
// Update the rasterizer state with the current viewport.
var viewport = new Viewport(0, 0, window.FramebufferSize.X, window.FramebufferSize.Y, 0, 1);
deviceContext.RSSetViewports(1, in viewport);
// Tell the output merger about our render target view.
deviceContext.OMSetRenderTargets(1, ref renderTargetView, ref Unsafe.NullRef<ID3D11DepthStencilView>());
// Update the input assembler to use our shader input layout, and associated vertex & index buffers.
deviceContext.IASetPrimitiveTopology(D3DPrimitiveTopology.D3DPrimitiveTopologyTrianglelist);
uint vertexStride = (uint)sizeof(VertexPositionColor);
uint vertexOffset = 0U;
deviceContext.IASetVertexBuffers(0, 1, vertexBuffer, in vertexStride, in vertexOffset);
deviceContext.IASetIndexBuffer(indexBuffer, Format.FormatR32Uint, 0);
// Bind our shaders.
basicShaders.BasicColorShader.ApplyShader();
// Draw the quad.
deviceContext.DrawIndexed(6, 0, 0);
//deviceContext.Draw(3, 0);
// Present the drawn image.
swapchain.Present(1, 0);
// Clean up any resources created in this method.
renderTargetView.Dispose();
}
void OnKeyDown(IKeyboard keyboard, Key key, int scancode)
{
// Check to close the window on escape.
if (key == Key.Escape)
{
window.Close();
}
}
我把整个项目放到了 github 上： https://github.com/Kordi3112/SilkNetTest3chrome---settings-searchEngines
我用过：https://github.com/dotnet/Silk.NET/tree/main/examples/CSharp/Direct3D11%20Tutorials/Tutorial%201.2%20-%20Hello%20quad 作为模板，并制作了一些类来提高代码可见性。
模板工作正常
当我修改像素着色器而不是返回“input.col”（来自像素着色器的颜色数据）时，我输入“return float4(1, 0, 0, 1)”，但仍然没有显示任何内容。这似乎是顶点缓冲区或输入布局的问题。
您分配了一个顶点缓冲区和一个索引缓冲区，但您从不复制其中的数据。
所以你想替换这些行：
vertexBuffer = BufferHelper.Create(device, vertices.Length * sizeof(VertexPositionColor), BindFlag.VertexBuffer, 0);
indexBuffer = BufferHelper.Create(device, indices.Length * sizeof(uint), BindFlag.IndexBuffer, 0);
这样，使用
verticesindicesvertexBuffer = BufferHelper.Create(device, vertices, vertices.Length * sizeof(VertexPositionColor), BindFlag.VertexBuffer, 0);
indexBuffer = BufferHelper.Create(device, indices, indices.Length * sizeof(uint), BindFlag.IndexBuffer, 0);
所以他们最终会出现在这段代码中：
unsafe
{
// use the buffer data
fixed (T* pData = data)
{
var subresourceData = new SubresourceData
{
PSysMem = pData
};
SilkMarshal.ThrowHResult(device.CreateBuffer(in bufferDesc, in subresourceData, ref buffer));
}
}