[WPF] 使用Silk.NET繪制D3D9或OpenGL內容并完美解決空域問題。

可擴展渲染控件實現的基本思路（D3D、OpenGL繪制所使用的基類）：

首先創建一個抽象類 FramebufferBase，該類主要記錄當前控件寬高和圖像資源。

public abstract class FramebufferBase : IDisposable
{
    public abstract int FramebufferWidth { get; }

    public abstract int FramebufferHeight { get; }

    public abstract D3DImage D3dImage { get; }

    public abstract void Dispose();
}

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接下來創建一個基本繪制控件，我這邊取名為GameBase。

public abstract class GameBase<TFrame> : Control where TFrame : FramebufferBase

當我們在繪制3d內容的時候，總是會先在繪制前做一個準備，比如加載Shader，設置頂點、紋理等等。。。

所以我們應該加入準備階段事件和繪制事件。

當然如果當前幀繪制完成后，我們也可以做一些操作為下一次渲染做準備。

public abstract event Action Ready;
public abstract event Action<TimeSpan> Render;
public abstract event Action<object, TimeSpan> UpdateFrame;

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創建三個抽象方法 OnStart、OnDraw、OnSizeChanged

因為D3D和OpenGL創建幀和繪制的方式不太一致，所以需要提出來在繼承類中做實現。

protected abstract void OnStart();
protected abstract void OnDraw(DrawingContext drawingContext);
protected abstract void OnSizeChanged(SizeChangedInfo sizeInfo);

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重載OnRenderSizeChanged、OnRender方法

因為新版本VS加入后了設計時預覽，所以我判斷了下（DesignerProperties.GetIsInDesignMode）。

protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
{
    if (!DesignerProperties.GetIsInDesignMode(this))
    {
        OnSizeChanged(sizeInfo);
    }
}

protected override void OnRender(DrawingContext drawingContext)
{
　　if (DesignerProperties.GetIsInDesignMode(this))
　　{
　　　　DesignTimeHelper.DrawDesign(this, drawingContext);
　　}
　　else
　　{
　　　　if (Framebuffer != null && Framebuffer.D3dImage.IsFrontBufferAvailable)
　　　　{
　　　　　　OnDraw(drawingContext);

　　　　　　_stopwatch.Restart();
　　　　}
　　}
}

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創建一個Start方法

CompositionTarget.Rendering事件用于幀繪制并計算幀率。

public void Start()
{
　　if (!DesignerProperties.GetIsInDesignMode(this))
　　{
　　　　IsVisibleChanged += (_, e) =>
　　　　{
　　　　　　if ((bool)e.NewValue)
　　　　　　{
　　　　　　　　CompositionTarget.Rendering += CompositionTarget_Rendering;
　　　　　　}
　　　　　　else
　　　　　　{
　　　　　　　　CompositionTarget.Rendering -= CompositionTarget_Rendering;
　　　　　　}
　　　　};

　　　　Loaded += (_, _) => InvalidateVisual();

　　　　OnStart();
　　}
}
private void CompositionTarget_Rendering(object sender, EventArgs e)
{
　　RenderingEventArgs args = (RenderingEventArgs)e;

　　if (_lastRenderTime != args.RenderingTime)
　　{
　　　　InvalidateVisual();

　　　　_fpsSample.Add(Convert.ToInt32(1000.0d / (args.RenderingTime.TotalMilliseconds - _lastRenderTime.TotalMilliseconds)));
　　　　// 樣本數 30
　　　　if (_fpsSample.Count == 30)
　　　　{
　　　　　　Fps = Convert.ToInt32(_fpsSample.Average());
　　　　　　_fpsSample.Clear();
　　　　}

　　　　_lastRenderTime = args.RenderingTime;
　　}
}

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初期階段，做這些準備就夠了

剩下一些變量和依賴屬性

public static readonly DependencyProperty FpsProperty = DependencyProperty.Register(nameof(Fps), typeof(int), typeof(GameBase<TFrame>), new PropertyMetadata(0));
    
protected readonly Stopwatch _stopwatch = Stopwatch.StartNew();
private readonly List<int> _fpsSample = new();

protected TimeSpan _lastRenderTime = TimeSpan.FromSeconds(-1);
protected TimeSpan _lastFrameStamp;

protected TFrame Framebuffer { get; set; }
public int Fps
{
    get { return (int)GetValue(FpsProperty); }
    set { SetValue(FpsProperty, value); }
}

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OK，基本思路就這樣，接下來我將講解具體實現。

D3D9繪制：

使用庫：Silk.NET.Direct3D9

創建RenderContext類，此類主要功能是創建d3d設備及繪制格式。

創建一個d3d9的實例。

IDirect3D9Ex* direct3D9;

D3D9.GetApi().Direct3DCreate9Ex(D3D9.SdkVersion, &direct3D9);

獲取屏幕基本信息。

Displaymodeex pMode = new((uint)sizeof(Displaymodeex));
direct3D9->GetAdapterDisplayModeEx(D3D9.AdapterDefault, ref pMode, null);

創建d3d9設備。

重要參數：

BackBufferFormat 這個要與獲取的屏幕信息里的格式一致。

PresentParameters presentParameters = new()
{
　　Windowed = 1,
　　SwapEffect = Swapeffect.Discard,
　　HDeviceWindow = 0,
　　PresentationInterval = 0,
　　BackBufferFormat = pMode.Format,
　　BackBufferWidth = 1,
　　BackBufferHeight = 1,
　　AutoDepthStencilFormat = Format.Unknown,
　　BackBufferCount = 1,
　　EnableAutoDepthStencil = 0,
　　Flags = 0,
　　FullScreenRefreshRateInHz = 0,
　　MultiSampleQuality = 0,
　　MultiSampleType = MultisampleType.MultisampleNone
};
direct3D9->CreateDeviceEx(D3D9.AdapterDefault, Devtype.Hal, 0, D3D9.CreateHardwareVertexprocessing | D3D9.CreateMultithreaded | D3D9.CreatePuredevice, ref presentParameters, (Displaymodeex*)IntPtr.Zero, &device);

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完整代碼：

public unsafe class RenderContext
{
    public IDirect3DDevice9Ex* Device { get; }

    public Format Format { get; }

    public RenderContext()
    {
        IDirect3D9Ex* direct3D9;
        IDirect3DDevice9Ex* device;
        D3D9.GetApi().Direct3DCreate9Ex(D3D9.SdkVersion, &direct3D9);

        Displaymodeex pMode = new((uint)sizeof(Displaymodeex));
        direct3D9->GetAdapterDisplayModeEx(D3D9.AdapterDefault, ref pMode, null);

        PresentParameters presentParameters = new()
        {
            Windowed = 1,
            SwapEffect = Swapeffect.Discard,
            HDeviceWindow = 0,
            PresentationInterval = 0,
            BackBufferFormat = pMode.Format,
            BackBufferWidth = 1,
            BackBufferHeight = 1,
            AutoDepthStencilFormat = Format.Unknown,
            BackBufferCount = 1,
            EnableAutoDepthStencil = 0,
            Flags = 0,
            FullScreenRefreshRateInHz = 0,
            MultiSampleQuality = 0,
            MultiSampleType = MultisampleType.MultisampleNone
        };
        direct3D9->CreateDeviceEx(D3D9.AdapterDefault, Devtype.Hal, 0, D3D9.CreateHardwareVertexprocessing | D3D9.CreateMultithreaded | D3D9.CreatePuredevice, ref presentParameters, (Displaymodeex*)IntPtr.Zero, &device);

        Device = device;
        Format = pMode.Format;
    }
}

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繼承FramebufferBase創建Framebuffer類

這里就是根據傳入的寬高創建一個新的Surface并綁定到D3DImage上

public unsafe class Framebuffer : FramebufferBase
{
    public RenderContext Context { get; }

    public override int FramebufferWidth { get; }

    public override int FramebufferHeight { get; }

    public override D3DImage D3dImage { get; }

    public Framebuffer(RenderContext context, int framebufferWidth, int framebufferHeight)
    {
        Context = context;
        FramebufferWidth = framebufferWidth;
        FramebufferHeight = framebufferHeight;

        IDirect3DSurface9* surface;
        context.Device->CreateRenderTarget((uint)FramebufferWidth, (uint)FramebufferHeight, context.Format, MultisampleType.MultisampleNone, 0, 0, &surface, null);
        context.Device->SetRenderTarget(0, surface);

        D3dImage = new D3DImage();
        D3dImage.Lock();
        D3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, (IntPtr)surface);
        D3dImage.Unlock();
    }

    public override void Dispose()
    {
        GC.SuppressFinalize(this);
    }
}

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創建GameControl，并繼承GameBase

public unsafe class GameControl : GameBase<Framebuffer>

private RenderContext _context;

public IDirect3DDevice9Ex* Device { get; private set; }
public Format Format { get; private set; }

public override event Action Ready;
public override event Action<TimeSpan> Render;
public override event Action<object, TimeSpan> UpdateFrame;

重載OnStart方法

在使用時，OnStart只調用一次并創建RenderContext

protected override void OnStart()
{
　　if (_context == null)
　　{
　　　　_context = new RenderContext();
　　　　Device = _context.Device;
　　　　Format = _context.Format;

　　　　Ready?.Invoke();
　　}
}

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重載OnSizeChanged方法

每當控件大小方式改變時，將重新創建Framebuffer。

protected override void OnSizeChanged(SizeChangedInfo sizeInfo)
{
　　if (_context != null && sizeInfo.NewSize.Width > 0 && sizeInfo.NewSize.Height > 0)
　　{
　　　　Framebuffer?.Dispose();
　　　　Framebuffer = new Framebuffer(_context, (int)sizeInfo.NewSize.Width, (int)sizeInfo.NewSize.Height);
　　}
}

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重載OnDraw方法

首先鎖定D3dImage，執行Render進行繪制。

繪制完成后，刷新D3dImage并解鎖。

將D3dImage資源繪制到控件上。

執行UpdateFrame，告訴使用者，已經繪制完成。

protected override void OnDraw(DrawingContext drawingContext)
{
　　Framebuffer.D3dImage.Lock();

　　Render?.Invoke(_stopwatch.Elapsed - _lastFrameStamp);

　　Framebuffer.D3dImage.AddDirtyRect(new Int32Rect(0, 0, Framebuffer.FramebufferWidth, Framebuffer.FramebufferHeight));
　　Framebuffer.D3dImage.Unlock();

　　Rect rect = new(0, 0, Framebuffer.D3dImage.Width, Framebuffer.D3dImage.Height);
　　drawingContext.DrawImage(Framebuffer.D3dImage, rect);

　　UpdateFrame?.Invoke(this, _stopwatch.Elapsed - _lastFrameStamp);
}

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使用方式：

<UserControl x:Class="SilkWPF.Direct3D9.Sample.MiniTri"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:direct3D9="clr-namespace:SilkWPF.Direct3D9"
             mc:Ignorable="d"
             d:DesignHeight="450"
             d:DesignWidth="800">
    <Grid>
        <direct3D9:GameControl x:Name="Game" />
        <TextBlock HorizontalAlignment="Left"
                   VerticalAlignment="Top"
                   Margin="10,5,0,0"
                   FontSize="30"
                   Foreground="Green"
                   Text="{Binding ElementName=Game, Path=Fps}" />
    </Grid>
</UserControl>

Xaml

using Silk.NET.Direct3D9;
using Silk.NET.Maths;
using SilkWPF.Common;
using System.Diagnostics;
using System.Numerics;
using System.Runtime.InteropServices;
using System.Windows.Controls;

namespace SilkWPF.Direct3D9.Sample;

/// <summary>
/// MiniTri.xaml 的交互邏輯
/// </summary>
public unsafe partial class MiniTri : UserControl
{
    [StructLayout(LayoutKind.Sequential)]
    struct Vertex
    {
        public Vector4 Position;
        public uint Color;
    }

    private readonly Stopwatch _stopwatch = Stopwatch.StartNew();
    private readonly Vertex[] _vertices =
    {
        new Vertex() { Color = (uint)SilkColor.Red.ToBgra(), Position = new Vector4(400.0f, 100.0f, 0.5f, 1.0f) },
        new Vertex() { Color = (uint)SilkColor.Blue.ToBgra(), Position = new Vector4(650.0f, 500.0f, 0.5f, 1.0f) },
        new Vertex() { Color = (uint)SilkColor.Green.ToBgra(), Position = new Vector4(150.0f, 500.0f, 0.5f, 1.0f) }
    };
    private readonly Vertexelement9[] _vertexelements =
    {
        new Vertexelement9(0, 0, 3, 0, 9, 0),
        new Vertexelement9(0, 16, 4, 0, 10, 0),
        new Vertexelement9(255, 0, 17, 0, 0, 0)
    };

    private IDirect3DVertexBuffer9* _ppVertexBuffer;
    private IDirect3DVertexDeclaration9* _ppDecl;

    public MiniTri()
    {
        InitializeComponent();

        Game.Ready += Game_Ready;
        Game.Render += Game_Render;
        Game.Start();
    }

    private void Game_Ready()
    {
        fixed (Vertex* ptr = &_vertices[0])
        {
            fixed (Vertexelement9* vertexElems = &_vertexelements[0])
            {
                void* ppbData;
                Game.Device->CreateVertexBuffer(3 * 20, D3D9.UsageWriteonly, 0, Pool.Default, ref _ppVertexBuffer, null);
                _ppVertexBuffer->Lock(0, 0, &ppbData, 0);
                System.Runtime.CompilerServices.Unsafe.CopyBlockUnaligned(ppbData, ptr, (uint)(sizeof(Vertex) * _vertices.Length));
                _ppVertexBuffer->Unlock();

                Game.Device->CreateVertexDeclaration(vertexElems, ref _ppDecl);
            }
        }
    }

    private void Game_Render(TimeSpan obj)
    {
        float hue = (float)_stopwatch.Elapsed.TotalSeconds * 0.15f % 1;
        Vector4 vector = new(1.0f * hue, 1.0f * 0.75f, 1.0f * 0.75f, 1.0f);

        Game.Device->Clear(0, null, D3D9.ClearTarget, (uint)SilkColor.FromHsv(vector).ToBgra(), 1.0f, 0);
        Game.Device->BeginScene();

        Game.Device->SetStreamSource(0, _ppVertexBuffer, 0, 20);
        Game.Device->SetVertexDeclaration(_ppDecl);
        Game.Device->DrawPrimitive(Primitivetype.Trianglelist, 0, 1);

        Game.Device->EndScene();
        Game.Device->Present((Rectangle<int>*)IntPtr.Zero, (Rectangle<int>*)IntPtr.Zero, 1, (RGNData*)IntPtr.Zero);
    }
}

運行代碼，你將得到一個漸變顏色的三角形（amd處理器上對d3d9的支持特別差，使用MediaElement播放視頻也卡的不行）。

顯示幀數比較低，不用太在意（amd出來背鍋）。

接下來時繪制OpenGL內容：

分割一下 ——————————————————————————————————————————————————————————————————

OpenGL繪制：

實現思路：

使用庫：Silk.NET.Direct3D9、OpenTK

可能大家比較奇怪，為什么不用Silk.NET.OpenGL，

目前Silk中的Wgl函數并不完整，我這里需要一些wgl的擴展函數用于關聯D3D9設備。

所以我就先使用OpenTK做繪制。

創建一個OpenGL的配置信息類 Settings

public class Settings
{
    public int MajorVersion { get; set; } = 3;

    public int MinorVersion { get; set; } = 3;

    public ContextFlags GraphicsContextFlags { get; set; } = ContextFlags.Default;

    public ContextProfile GraphicsProfile { get; set; } = ContextProfile.Core;

    public IGraphicsContext ContextToUse { get; set; }

    public static bool WouldResultInSameContext([NotNull] Settings a, [NotNull] Settings b)
    {
        if (a.MajorVersion != b.MajorVersion)
        {
            return false;
        }

        if (a.MinorVersion != b.MinorVersion)
        {
            return false;
        }

        if (a.GraphicsProfile != b.GraphicsProfile)
        {
            return false;
        }

        if (a.GraphicsContextFlags != b.GraphicsContextFlags)
        {
            return false;
        }

        return true;

    }
}

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創建RenderContext類

具體實現與d3d差不太多，主要是創建設備。

不過要注意GetOrCreateSharedOpenGLContext方法，他是靜態的，

我們在初始化wgl時需要一個窗體，所以我在這里讓所有繪制控件都使用一個窗體。

public unsafe class RenderContext
{
    private static IGraphicsContext _sharedContext;
    private static Settings _sharedContextSettings;
    private static int _sharedContextReferenceCount;

    public Format Format { get; }

    public IntPtr DxDeviceHandle { get; }

    public IntPtr GlDeviceHandle { get; }

    public IGraphicsContext GraphicsContext { get; }

    public RenderContext(Settings settings)
    {
        IDirect3D9Ex* direct3D9;
        IDirect3DDevice9Ex* device;
        D3D9.GetApi().Direct3DCreate9Ex(D3D9.SdkVersion, &direct3D9);

        Displaymodeex pMode = new((uint)sizeof(Displaymodeex));
        direct3D9->GetAdapterDisplayModeEx(D3D9.AdapterDefault, ref pMode, null);
        Format = pMode.Format;

        PresentParameters presentParameters = new()
        {
            Windowed = 1,
            SwapEffect = Swapeffect.Discard,
            HDeviceWindow = 0,
            PresentationInterval = 0,
            BackBufferFormat = Format,
            BackBufferWidth = 1,
            BackBufferHeight = 1,
            AutoDepthStencilFormat = Format.Unknown,
            BackBufferCount = 1,
            EnableAutoDepthStencil = 0,
            Flags = 0,
            FullScreenRefreshRateInHz = 0,
            MultiSampleQuality = 0,
            MultiSampleType = MultisampleType.MultisampleNone
        };
        direct3D9->CreateDeviceEx(D3D9.AdapterDefault, Devtype.Hal, 0, D3D9.CreateHardwareVertexprocessing | D3D9.CreateMultithreaded | D3D9.CreatePuredevice, ref presentParameters, (Displaymodeex*)IntPtr.Zero, &device);

        DxDeviceHandle = (IntPtr)device;

        GraphicsContext = GetOrCreateSharedOpenGLContext(settings);
        GlDeviceHandle = Wgl.DXOpenDeviceNV((IntPtr)device);
    }

    private static IGraphicsContext GetOrCreateSharedOpenGLContext(Settings settings)
    {
        if (_sharedContext == null)
        {
            NativeWindowSettings windowSettings = NativeWindowSettings.Default;
            windowSettings.StartFocused = false;
            windowSettings.StartVisible = false;
            windowSettings.NumberOfSamples = 0;
            windowSettings.APIVersion = new Version(settings.MajorVersion, settings.MinorVersion);
            windowSettings.Flags = ContextFlags.Offscreen | settings.GraphicsContextFlags;
            windowSettings.Profile = settings.GraphicsProfile;
            windowSettings.WindowBorder = WindowBorder.Hidden;
            windowSettings.WindowState = WindowState.Minimized;
            NativeWindow nativeWindow = new(windowSettings);
            Wgl.LoadBindings(new GLFWBindingsContext());

            _sharedContext = nativeWindow.Context;
            _sharedContextSettings = settings;

            _sharedContext.MakeCurrent();
        }
        else
        {
            if (!Settings.WouldResultInSameContext(settings, _sharedContextSettings))
            {
                throw new ArgumentException($"The provided {nameof(Settings)} would result" +
                                                $"in a different context creation to one previously created. To fix this," +
                                                $" either ensure all of your context settings are identical, or provide an " +
                                                $"external context via the '{nameof(Settings.ContextToUse)}' field.");
            }
        }

        Interlocked.Increment(ref _sharedContextReferenceCount);

        return _sharedContext;
    }
}

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創建Framebuffer類

這里主要用d3d創建一個Surface，

gl根據Surface生成一個Frame。

public unsafe class Framebuffer : FramebufferBase
{
    public RenderContext Context { get; }

    public override int FramebufferWidth { get; }

    public override int FramebufferHeight { get; }

    public int GLFramebufferHandle { get; }

    public int GLSharedTextureHandle { get; }

    public int GLDepthRenderBufferHandle { get; }

    public IntPtr DxInteropRegisteredHandle { get; }

    public override D3DImage D3dImage { get; }

    public TranslateTransform TranslateTransform { get; }

    public ScaleTransform FlipYTransform { get; }

    public Framebuffer(RenderContext context, int framebufferWidth, int framebufferHeight)
    {
        Context = context;
        FramebufferWidth = framebufferWidth;
        FramebufferHeight = framebufferHeight;

        IDirect3DDevice9Ex* device = (IDirect3DDevice9Ex*)context.DxDeviceHandle;
        IDirect3DSurface9* surface;
        void* surfacePtr = (void*)IntPtr.Zero;
        device->CreateRenderTarget((uint)FramebufferWidth, (uint)FramebufferHeight, context.Format, MultisampleType.MultisampleNone, 0, 0, &surface, &surfacePtr);

        Wgl.DXSetResourceShareHandleNV((IntPtr)surface, (IntPtr)surfacePtr);
        GLFramebufferHandle = GL.GenFramebuffer();
        GLSharedTextureHandle = GL.GenTexture();

        DxInteropRegisteredHandle = Wgl.DXRegisterObjectNV(context.GlDeviceHandle, (IntPtr)surface, (uint)GLSharedTextureHandle, (uint)TextureTarget.Texture2D, WGL_NV_DX_interop.AccessReadWrite);

        GL.BindFramebuffer(FramebufferTarget.Framebuffer, GLFramebufferHandle);
        GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, GLSharedTextureHandle, 0);

        GLDepthRenderBufferHandle = GL.GenRenderbuffer();
        GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, GLDepthRenderBufferHandle);
        GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.Depth24Stencil8, FramebufferWidth, FramebufferHeight);

        GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, GLDepthRenderBufferHandle);
        GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.StencilAttachment, RenderbufferTarget.Renderbuffer, GLDepthRenderBufferHandle);
        GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);

        D3dImage = new D3DImage();
        D3dImage.Lock();
        D3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, (IntPtr)surface);
        D3dImage.Unlock();

        TranslateTransform = new TranslateTransform(0, FramebufferHeight);
        FlipYTransform = new ScaleTransform(1, -1);
    }

    public override void Dispose()
    {
        GL.DeleteFramebuffer(GLFramebufferHandle);
        GL.DeleteRenderbuffer(GLDepthRenderBufferHandle);
        GL.DeleteTexture(GLSharedTextureHandle);
        Wgl.DXUnregisterObjectNV(Context.GlDeviceHandle, DxInteropRegisteredHandle);

        GC.SuppressFinalize(this);
    }
}

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創建GameControl并繼承GameBase

重載OnDraw方法

跟d3d一樣，繪制前需要鎖定Frame。

繪制完成后進行刷新。

這里有一點不同的是，OpenGL的頂點在左下角（0，0）

所以要對圖像進行翻轉。

protected override void OnDraw(DrawingContext drawingContext)
{
　　Framebuffer.D3dImage.Lock();

　　Wgl.DXLockObjectsNV(_context.GlDeviceHandle, 1, new[] { Framebuffer.DxInteropRegisteredHandle });
　　GL.BindFramebuffer(FramebufferTarget.Framebuffer, Framebuffer.GLFramebufferHandle);

　　GL.Viewport(0, 0, Framebuffer.FramebufferWidth, Framebuffer.FramebufferHeight);
　　Render?.Invoke(_stopwatch.Elapsed - _lastFrameStamp);

　　GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
　　Wgl.DXUnlockObjectsNV(_context.GlDeviceHandle, 1, new[] { Framebuffer.DxInteropRegisteredHandle });

　　Framebuffer.D3dImage.AddDirtyRect(new Int32Rect(0, 0, Framebuffer.FramebufferWidth, Framebuffer.FramebufferHeight));
　　Framebuffer.D3dImage.Unlock();

　　drawingContext.PushTransform(Framebuffer.TranslateTransform);
　　drawingContext.PushTransform(Framebuffer.FlipYTransform);

　　Rect rect = new(0, 0, Framebuffer.D3dImage.Width, Framebuffer.D3dImage.Height);
　　drawingContext.DrawImage(Framebuffer.D3dImage, rect);

　　drawingContext.Pop();
　　drawingContext.Pop();

　　UpdateFrame?.Invoke(this, _stopwatch.Elapsed - _lastFrameStamp);
}

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其余函數與d3d基本一致，我就不說了(沒想到寫文章這么累)

完整代碼：

public class GameControl : GameBase<Framebuffer>
{
    private RenderContext _context;

    public Settings Setting { get; set; } = new Settings();

    public override event Action Ready;
    public override event Action<TimeSpan> Render;
    public override event Action<object, TimeSpan> UpdateFrame;

    protected override void OnStart()
    {
        if (_context == null)
        {
            _context = new RenderContext(Setting);

            Ready?.Invoke();
        }
    }

    protected override void OnSizeChanged(SizeChangedInfo sizeInfo)
    {
        if (_context != null && sizeInfo.NewSize.Width > 0 && sizeInfo.NewSize.Height > 0)
        {
            Framebuffer?.Dispose();
            Framebuffer = new Framebuffer(_context, (int)sizeInfo.NewSize.Width, (int)sizeInfo.NewSize.Height);
        }
    }

    protected override void OnDraw(DrawingContext drawingContext)
    {
        Framebuffer.D3dImage.Lock();

        Wgl.DXLockObjectsNV(_context.GlDeviceHandle, 1, new[] { Framebuffer.DxInteropRegisteredHandle });
        GL.BindFramebuffer(FramebufferTarget.Framebuffer, Framebuffer.GLFramebufferHandle);

        GL.Viewport(0, 0, Framebuffer.FramebufferWidth, Framebuffer.FramebufferHeight);
        Render?.Invoke(_stopwatch.Elapsed - _lastFrameStamp);

        GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
        Wgl.DXUnlockObjectsNV(_context.GlDeviceHandle, 1, new[] { Framebuffer.DxInteropRegisteredHandle });

        Framebuffer.D3dImage.AddDirtyRect(new Int32Rect(0, 0, Framebuffer.FramebufferWidth, Framebuffer.FramebufferHeight));
        Framebuffer.D3dImage.Unlock();

        drawingContext.PushTransform(Framebuffer.TranslateTransform);
        drawingContext.PushTransform(Framebuffer.FlipYTransform);

        Rect rect = new(0, 0, Framebuffer.D3dImage.Width, Framebuffer.D3dImage.Height);
        drawingContext.DrawImage(Framebuffer.D3dImage, rect);

        drawingContext.Pop();
        drawingContext.Pop();

        UpdateFrame?.Invoke(this, _stopwatch.Elapsed - _lastFrameStamp);
    }
}

View Code

使用示例：

本文使用的代碼地址：

c#版本：

qian-o/SilkRenderer: WPF、WinUI3 Use Silk.NET to draw examples (OpenGL, DirectX) (github.com)

posted @ 2023-02-13 15:47 o王先生o 閱讀(2702) 評論(5) 收藏舉報

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王_先_生

[WPF] 使用Silk.NET繪制D3D9或OpenGL內容并完美解決空域問題。

可擴展渲染控件實現的基本思路（D3D、OpenGL繪制所使用的基類）：

D3D9繪制：

OpenGL繪制：

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