问SharpDX 3.0.2 D3D11 -如何从文件中加载纹理并使其在着色器中工作？

EN

var device = this.DeviceManager.Direct3DDevice;
var texture = TextureLoader.CreateTexture2DFromBitmap(device, TextureLoader.LoadBitmap(new SharpDX.WIC.ImagingFactory2(), "Texture2.png"));
ShaderResourceView textureView = new ShaderResourceView(device, texture);

    if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
    {
        bitmap = bitmap.Clone(new Rectangle(0, 0, bitmap.Width, bitmap.Height), PixelFormat.Format32bppArgb);
    }
    var data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
    var ret = new SharpDX.Direct3D11.Texture2D(device, new SharpDX.Direct3D11.Texture2DDescription()
    {
        Width = bitmap.Width,
        Height = bitmap.Height,
        ArraySize = 1,
        BindFlags = SharpDX.Direct3D11.BindFlags.ShaderResource,
        Usage = SharpDX.Direct3D11.ResourceUsage.Immutable,
        CpuAccessFlags = SharpDX.Direct3D11.CpuAccessFlags.None,
        Format = SharpDX.DXGI.Format.B8G8R8A8_UNorm,
        MipLevels = 1,
        OptionFlags = SharpDX.Direct3D11.ResourceOptionFlags.None,
        SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
    }, new SharpDX.DataRectangle(data.Scan0, data.Stride));
    bitmap.UnlockBits(data);
    return ret;

 public class TextureLoader
{
    /// <summary>
    /// Loads a bitmap using WIC.
    /// </summary>
    /// <param name="deviceManager"></param>
    /// <param name="filename"></param>
    /// <returns></returns>
    public static SharpDX.WIC.BitmapSource LoadBitmap(SharpDX.WIC.ImagingFactory2 factory, string filename)
    {
        var bitmapDecoder = new SharpDX.WIC.BitmapDecoder(
            factory,
            filename,
            SharpDX.WIC.DecodeOptions.CacheOnDemand
            );

        var formatConverter = new SharpDX.WIC.FormatConverter(factory);

        formatConverter.Initialize(
            bitmapDecoder.GetFrame(0),
            SharpDX.WIC.PixelFormat.Format32bppPRGBA,
            SharpDX.WIC.BitmapDitherType.None, 
            null,
            0.0, 
            SharpDX.WIC.BitmapPaletteType.Custom);

        return formatConverter;
    }

    /// <summary>
    /// Creates a <see cref="SharpDX.Direct3D11.Texture2D"/> from a WIC <see cref="SharpDX.WIC.BitmapSource"/>
    /// </summary>
    /// <param name="device">The Direct3D11 device</param>
    /// <param name="bitmapSource">The WIC bitmap source</param>
    /// <returns>A Texture2D</returns>
    public static SharpDX.Direct3D11.Texture2D CreateTexture2DFromBitmap(SharpDX.Direct3D11.Device device, SharpDX.WIC.BitmapSource bitmapSource)
    {
        // Allocate DataStream to receive the WIC image pixels
        int stride = bitmapSource.Size.Width * 4;
        using (var buffer = new SharpDX.DataStream(bitmapSource.Size.Height * stride, true, true))
        {
            // Copy the content of the WIC to the buffer
            bitmapSource.CopyPixels(stride, buffer);
            return new SharpDX.Direct3D11.Texture2D(device, new SharpDX.Direct3D11.Texture2DDescription()
            {
                Width = bitmapSource.Size.Width,
                Height = bitmapSource.Size.Height,
                ArraySize = 1,
                BindFlags = SharpDX.Direct3D11.BindFlags.ShaderResource,
                Usage = SharpDX.Direct3D11.ResourceUsage.Immutable,
                CpuAccessFlags = SharpDX.Direct3D11.CpuAccessFlags.None,
                Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm,
                MipLevels = 1,
                OptionFlags = SharpDX.Direct3D11.ResourceOptionFlags.None,
                SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
            }, new SharpDX.DataRectangle(buffer.DataPointer, stride));
        }
    }
}