/// <summary>
/// 指定された単色ビットマップ画像をDXT3テクスチャへ変換する
/// </summary>
/// <param name="source">変換元画像</param>
/// <param name="color0">単色カラー</param>
/// <returns>DXT3圧縮された画像</returns>
public static Dxt3BitmapContent Compress(PixelBitmapContent <Color> source,
Color color0)
{
// DXT3ブロックデータを格納するためのバッファを確保
byte[] outputData = new byte[source.Width * source.Height];
// 単色カラーをBGR565に変換する
ushort packedColor = new Bgr565(color0.ToVector3()).PackedValue;
// 指定された画像を圧縮ブロック単位に処理をする
int outputIndex = 0;
for (int blockY = 0; blockY < source.Height; blockY += 4)
{
for (int blockX = 0; blockX < source.Width; blockX += 4)
{
CompressDxt3Block(source, blockX, blockY, packedColor,
outputData, outputIndex);
outputIndex += 16;
}
}
// DXT3テクスチャの生成と圧縮したブロックデータの設定
var result = new Dxt3BitmapContent(source.Width, source.Height);
result.SetPixelData(outputData);
return(result);
}
/// <summary>
/// Converts a DigitalRune <see cref="Image"/> to an XNA <see cref="BitmapContent"/>.
/// </summary>
/// <param name="image">The <see cref="Image"/>.</param>
/// <returns>The <see cref="BitmapContent"/>.</returns>
public static BitmapContent ToContent(Image image)
{
BitmapContent content;
switch (image.Format)
{
case DataFormat.R8G8B8A8_UNORM:
case DataFormat.R8G8B8A8_UNORM_SRGB:
content = new PixelBitmapContent <Color>(image.Width, image.Height);
break;
case DataFormat.B5G6R5_UNORM:
content = new PixelBitmapContent <Bgr565>(image.Width, image.Height);
break;
#if !MONOGAME
case DataFormat.B5G5R5A1_UNORM:
content = new PixelBitmapContent <Bgra5551>(image.Width, image.Height);
break;
#endif
case DataFormat.B4G4R4A4_UNORM:
content = new PixelBitmapContent <Bgra4444>(image.Width, image.Height);
break;
case DataFormat.BC1_UNORM:
case DataFormat.BC1_UNORM_SRGB:
content = new Dxt1BitmapContent(image.Width, image.Height);
break;
case DataFormat.BC2_UNORM:
case DataFormat.BC2_UNORM_SRGB:
content = new Dxt3BitmapContent(image.Width, image.Height);
break;
case DataFormat.BC3_UNORM:
case DataFormat.BC3_UNORM_SRGB:
content = new Dxt5BitmapContent(image.Width, image.Height);
break;
case DataFormat.R8G8_SNORM:
content = new PixelBitmapContent <NormalizedByte2>(image.Width, image.Height);
break;
case DataFormat.R8G8B8A8_SNORM:
content = new PixelBitmapContent <NormalizedByte4>(image.Width, image.Height);
break;
#if !MONOGAME
case DataFormat.R10G10B10A2_UNORM:
content = new PixelBitmapContent <Rgba1010102>(image.Width, image.Height);
break;
case DataFormat.R16G16_UNORM:
content = new PixelBitmapContent <Rg32>(image.Width, image.Height);
break;
case DataFormat.R16G16B16A16_UNORM:
content = new PixelBitmapContent <Rgba64>(image.Width, image.Height);
break;
case DataFormat.A8_UNORM:
case DataFormat.R8_UNORM:
content = new PixelBitmapContent <Alpha8>(image.Width, image.Height);
break;
#endif
case DataFormat.R32_FLOAT:
content = new PixelBitmapContent <float>(image.Width, image.Height);
break;
case DataFormat.R32G32_FLOAT:
content = new PixelBitmapContent <Vector2>(image.Width, image.Height);
break;
case DataFormat.R32G32B32A32_FLOAT:
content = new PixelBitmapContent <Vector4>(image.Width, image.Height);
break;
case DataFormat.R16_FLOAT:
content = new PixelBitmapContent <HalfSingle>(image.Width, image.Height);
break;
case DataFormat.R16G16_FLOAT:
content = new PixelBitmapContent <HalfVector2>(image.Width, image.Height);
break;
case DataFormat.R16G16B16A16_FLOAT:
content = new PixelBitmapContent <HalfVector4>(image.Width, image.Height);
break;
#if MONOGAME
case DataFormat.PVRTCI_2bpp_RGB:
content = new PvrtcRgb2BitmapContent(image.Width, image.Height);
break;
case DataFormat.PVRTCI_4bpp_RGB:
content = new PvrtcRgb4BitmapContent(image.Width, image.Height);
break;
case DataFormat.PVRTCI_2bpp_RGBA:
content = new PvrtcRgba2BitmapContent(image.Width, image.Height);
break;
case DataFormat.PVRTCI_4bpp_RGBA:
content = new PvrtcRgba4BitmapContent(image.Width, image.Height);
break;
case DataFormat.ETC1:
content = new Etc1BitmapContent(image.Width, image.Height);
break;
//case DataFormat.ATC_RGB: Not supported in MonoGame.
case DataFormat.ATC_RGBA_EXPLICIT_ALPHA:
content = new AtcExplicitBitmapContent(image.Width, image.Height);
break;
case DataFormat.ATC_RGBA_INTERPOLATED_ALPHA:
content = new AtcInterpolatedBitmapContent(image.Width, image.Height);
break;
#endif
default:
string message = string.Format("The texture format {0} is not supported in MonoGame.", image.Format);
throw new NotSupportedException(message);
// Not supported:
// SurfaceFormat.HdrBlendable // Only needed as render target format.
// SurfaceFormat.Bgr32 // Only used as WPF render target.
// SurfaceFormat.Bgra32 // Only used as WPF render target.
// SurfaceFormat.Dxt1a
}
Debug.Assert(content != null);
#if !MONOGAME
// content.GetPixelData() is null in MonoGame.
Debug.Assert(image.Data.Length == content.GetPixelData().Length);
#endif
content.SetPixelData(image.Data);
return(content);
}