C# WinForm - SharpDX.Toolkit.Graphics 绘制 2D 纹理

Question

我想为 C# WinForms 应用程序实现硬件加速。原因是我必须绘制 150 x 720p 的图像，而 5 个图片框控件花费的时间太长（缩放+绘制图像），因此在处理和重新加载方面存在问题。 所以我处理了ShapeDX。

但现在我卡住了，不知道如何绘制 2D 纹理。为了测试代码，我只有一个测试按钮和一个图片框。

当我在 PictureBox 中运行代码时，还会加载 DirectX（Draw 或 3D）。我承认黑色背景。 但我不明白必须如何绘制纹理。

        String imageFile = "Image.JPG";

        Control TargetControl = this.pictureBoxCurrentFrameL;
        int TotalWidth = TargetControl.Width;
        int TotalHeight = TargetControl.Height;

        SharpDX.Direct3D11.Device defaultDevice = new SharpDX.Direct3D11.Device(SharpDX.Direct3D.DriverType.Hardware, SharpDX.Direct3D11.DeviceCreationFlags.Debug);

        SharpDX.Toolkit.Graphics.GraphicsDevice graphicsDevice = SharpDX.Toolkit.Graphics.GraphicsDevice.New(defaultDevice);
        SharpDX.Toolkit.Graphics.PresentationParameters presentationParameters = new SharpDX.Toolkit.Graphics.PresentationParameters();
        presentationParameters.DeviceWindowHandle = this.pictureBoxCurrentFrameL.Handle;
        presentationParameters.BackBufferWidth = TotalWidth;
        presentationParameters.BackBufferHeight = TotalHeight;

        SharpDX.Toolkit.Graphics.SwapChainGraphicsPresenter swapChainGraphicsPresenter = new SharpDX.Toolkit.Graphics.SwapChainGraphicsPresenter(graphicsDevice, presentationParameters);
        SharpDX.Toolkit.Graphics.Texture2D texture2D = SharpDX.Toolkit.Graphics.Texture2D.Load(graphicsDevice, imageFile);

        //Now i should draw. But how?

        swapChainGraphicsPresenter.Present();/**/

在 Windows 10 和 SharpDX-SDK-2.6.3 上使用 Microsoft Visual Studio Community 2015（.Net 4，C# WinForm）！

感谢您的帮助。

Answer 1

我通过简单地切换到 SlimDX (SlimDX Runtime .NET 4.0 x64 January 2012.msi, .Net4, Win10, MS Visual Studio Community 2015, Winforms App.) 解决了这个问题。有几个有用的教程。

要使用 SlimDX，只需将唯一的一个 DLL 链接到您的项目！安装 SlimDX 后，你会在你的 C 盘的某个地方找到这个 SlimDX.dll 文件。

了解您至少需要一个工厂和 Direct2D 的渲染目标非常重要。 RenderTarget 指向要使用的对象（Control/form/etc）并接管绘图。

不需要交换链。可能由渲染目标在内部使用。最大的部分是将位图转换为有用的 Direct2D 位图（用于绘图）。否则，您也可以从 MemoryStream 处理位图数据。

对于那些也在寻找解决方案的人：

        Control targetControl = this.pictureBoxCurrentFrameL;
        String imageFile = "Image.JPG";

        //Update control styles, works for forms, not for controls. I solve this later otherwise .
        //this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
        //this.SetStyle(ControlStyles.Opaque, true);
        //this.SetStyle(ControlStyles.ResizeRedraw, true);

        //Get requested debug level
        SlimDX.Direct2D.DebugLevel debugLevel = SlimDX.Direct2D.DebugLevel.None;

        //Resources for Direct2D rendering
        SlimDX.Direct2D.Factory d2dFactory = new SlimDX.Direct2D.Factory(SlimDX.Direct2D.FactoryType.Multithreaded, debugLevel);

        //Create the render target
        SlimDX.Direct2D.WindowRenderTarget d2dWindowRenderTarget = new SlimDX.Direct2D.WindowRenderTarget(d2dFactory, new SlimDX.Direct2D.WindowRenderTargetProperties() {
            Handle = targetControl.Handle,
            PixelSize = targetControl.Size,
            PresentOptions = SlimDX.Direct2D.PresentOptions.Immediately
        });

        //Paint!
        d2dWindowRenderTarget.BeginDraw();
        d2dWindowRenderTarget.Clear(new SlimDX.Color4(Color.LightSteelBlue));

        //Convert System.Drawing.Bitmap into SlimDX.Direct2D.Bitmap!
        System.Drawing.Bitmap bitmap = (System.Drawing.Bitmap)Properties.Resources.Image_720p;//loaded from embedded resource, can be changed to Bitmap.FromFile(imageFile); to load from hdd!
        SlimDX.Direct2D.Bitmap d2dBitmap = null;
        System.Drawing.Imaging.BitmapData bitmapData = bitmap.LockBits(new Rectangle(new Point(0, 0), bitmap.Size), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);//TODO: PixelFormat is very important!!! Check!
        SlimDX.DataStream dataStream = new SlimDX.DataStream(bitmapData.Scan0, bitmapData.Stride * bitmapData.Height, true, false);
        SlimDX.Direct2D.PixelFormat d2dPixelFormat = new SlimDX.Direct2D.PixelFormat(SlimDX.DXGI.Format.B8G8R8A8_UNorm, SlimDX.Direct2D.AlphaMode.Premultiplied);
        SlimDX.Direct2D.BitmapProperties d2dBitmapProperties = new SlimDX.Direct2D.BitmapProperties();
        d2dBitmapProperties.PixelFormat = d2dPixelFormat;
        d2dBitmap = new SlimDX.Direct2D.Bitmap(d2dWindowRenderTarget, new Size(bitmap.Width, bitmap.Height), dataStream, bitmapData.Stride, d2dBitmapProperties);
        bitmap.UnlockBits(bitmapData);

        //Draw SlimDX.Direct2D.Bitmap
        d2dWindowRenderTarget.DrawBitmap(d2dBitmap, new Rectangle(0, 0, bitmap.Width, bitmap.Height));/**/

        d2dWindowRenderTarget.EndDraw();

        //Dispose everything u dont need anymore.
        //bitmap.Dispose();//......

所以使用Direct2D超级简单，所有代码都可以压缩成2条主线+绘图：

        SlimDX.Direct2D.Factory d2dFactory = new SlimDX.Direct2D.Factory(SlimDX.Direct2D.FactoryType.Multithreaded, SlimDX.Direct2D.DebugLevel.None);
        SlimDX.Direct2D.WindowRenderTarget d2dWindowRenderTarget = new SlimDX.Direct2D.WindowRenderTarget(d2dFactory, new SlimDX.Direct2D.WindowRenderTargetProperties() { Handle = targetControl.Handle, PixelSize = targetControl.Size, PresentOptions = SlimDX.Direct2D.PresentOptions.Immediately });

        d2dWindowRenderTarget.BeginDraw();
        d2dWindowRenderTarget.Clear(new SlimDX.Color4(Color.LightSteelBlue));
        d2dWindowRenderTarget.DrawRectangle(new SlimDX.Direct2D.SolidColorBrush(d2dWindowRenderTarget, new SlimDX.Color4(Color.Red)), new Rectangle(20,20, targetControl.Width-40, targetControl.Height-40));
        d2dWindowRenderTarget.EndDraw();