コード例 #1
0
        private static void Save(Resource res, Stream stream, ImageFileFormat fmt)
        {
            var texture     = res as Texture2D;
            var textureCopy = new Texture2D(MyRender11.Device, new Texture2DDescription
            {
                Width             = (int)texture.Description.Width,
                Height            = (int)texture.Description.Height,
                MipLevels         = 1,
                ArraySize         = 1,
                Format            = texture.Description.Format,
                Usage             = ResourceUsage.Staging,
                SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
                BindFlags         = BindFlags.None,
                CpuAccessFlags    = CpuAccessFlags.Read,
                OptionFlags       = ResourceOptionFlags.None
            });

            RC.CopyResource(res, textureCopy);

            DataStream dataStream;
            var        dataBox = RC.MapSubresource(
                textureCopy,
                0,
                0,
                MapMode.Read,
                MapFlags.None,
                out dataStream);

            var dataRectangle = new DataRectangle
            {
                DataPointer = dataStream.DataPointer,
                Pitch       = dataBox.RowPitch
            };

            var bitmap = new Bitmap(
                MyRender11.WIC,
                textureCopy.Description.Width,
                textureCopy.Description.Height,
                PixelFormatFromFormat(textureCopy.Description.Format), // TODO: should use some conversion from textureCopy.Description.Format
                dataRectangle);

            using (var wicStream = new WICStream(MyRender11.WIC, stream))
            {
                BitmapEncoder bitmapEncoder;
                switch (fmt)
                {
                case ImageFileFormat.Png:
                    bitmapEncoder = new PngBitmapEncoder(MyRender11.WIC, wicStream);
                    break;

                case ImageFileFormat.Jpg:
                    bitmapEncoder = new JpegBitmapEncoder(MyRender11.WIC, wicStream);
                    break;

                case ImageFileFormat.Bmp:
                    bitmapEncoder = new BmpBitmapEncoder(MyRender11.WIC, wicStream);
                    break;

                default:
                    MyRenderProxy.Assert(false, "Unsupported file format.");
                    bitmapEncoder = null;
                    break;
                }
                if (bitmapEncoder != null)
                {
                    using (var bitmapFrameEncode = new BitmapFrameEncode(bitmapEncoder))
                    {
                        bitmapFrameEncode.Initialize();
                        bitmapFrameEncode.SetSize(bitmap.Size.Width, bitmap.Size.Height);
                        var pixelFormat = PixelFormat.FormatDontCare;
                        bitmapFrameEncode.SetPixelFormat(ref pixelFormat);
                        bitmapFrameEncode.WriteSource(bitmap);
                        bitmapFrameEncode.Commit();
                        bitmapEncoder.Commit();
                    }
                    bitmapEncoder.Dispose();
                }
            }

            RC.UnmapSubresource(textureCopy, 0);
            textureCopy.Dispose();
            bitmap.Dispose();
        }