c# - 在 Windows 应用商店应用程序中使用 SharpDX 加载纹理

Question

我已将我的 C# 游戏从 OpenTK (OpenGL) 转换为 SharpDX (DirectX)，并在 Visual Studio 2010 中启动并运行它。我还在 Windows 8 Developer Preview 的 Metro 中从 Visual Studio 11 启动并运行它.然而，Metro 构建仍然缺乏纹理，所以我的多边形现在只是简单地着色。问题是用于加载图像的方法在 Metro DLL 中不存在。 Windows Store App 中的 Texture2D 类(继承自 Resource 类)都缺少这些方法:

SharpDX.Direct3D11.Resource.FromStream
SharpDX.Direct3D11.Resource.FromFile
SharpDX.Direct3D11.Resource.FromMemory

有谁知道这些最终是否会在 Metro 中实现？或者我可以使用其他方法吗？请记住，在此之前我对 DirectX 或 SharpDX 一无所知，所以我对这一切仍然很困惑。

为 SharpDX 找到任何类型的帮助或信息并不容易，这很遗憾，因为它似乎是使用 C# 在 Metro 中实现 3D 的绝佳解决方案。

Answer 1

我不确定我是否清楚地理解了您的问题，但在 SharpDX 样本中我发现类“TextureLoader”有两种方法:“LoadBitmap”和“CreateTexture2DFromBitmap”。 看，您可以使用此函数从 .bmp、.png、.jpg 文件加载 BitmapSource:

    public static BitmapSource LoadBitmap(ImagingFactory2 factory, string filename)
    {
        var bitmapDecoder = new SharpDX.WIC.BitmapDecoder(
            factory,
            filename,
            SharpDX.WIC.DecodeOptions.CacheOnDemand
            );

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

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

        return result;
    }

要从 BitmapSource 获取 Texture2D，您可以使用:

    public static Texture2D CreateTexture2DFromBitmap(Device device, 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));
        }
    }

为了方便起见，我创建了这个函数:

        public static Texture2D LoadFromFile(Device device, ImagingFactory2 factory, string fileName)
        {
            var bs = LoadBitmap(factory, fileName);
            var texture = CreateTexture2DFromBitmap(device, bs);
            return texture;
        }