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DDSImage.cs
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DDSImage.cs
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/*
*
* DDSImage.cs - DDS Texture File Reading (Uncompressed, DXT1/2/3/4/5, V8U8) and Writing (Uncompressed Only)
*
* By Shendare (Jon D. Jackson)
*
* Rebuilt from Microsoft DDS documentation with the help of the DDSImage.cs reading class from
* Lorenzo Consolaro, under the MIT License. https://code.google.com/p/kprojects/
*
* Portions of this code not covered by another author's or entity's copyright are released under
* the Creative Commons Zero (CC0) public domain license.
*
* To the extent possible under law, Shendare (Jon D. Jackson) has waived all copyright and
* related or neighboring rights to this DDSImage class. This work is published from: The United States.
*
* You may copy, modify, and distribute the work, even for commercial purposes, without asking permission.
*
* For more information, read the CC0 summary and full legal text here:
*
* https://creativecommons.org/publicdomain/zero/1.0/
*
*/
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
namespace DDS
{
class DDSImage
{
#region Constants and Bitflags
private const uint MAGIC_NUMBER = 0x20534444;
private const uint DDPF_ALPHAPIXELS = 0x00000001;
private const uint DDPF_ALPHA = 0x00000002; // Alpha channel only. Deprecated.
private const uint DDPF_FOURCC = 0x00000004;
private const uint DDPF_RGB = 0x00000040;
private const uint DDPF_YUV = 0x00000200;
private const uint DDPF_LUMINANCE = 0x00020000;
private const int DDSD_CAPS = 0x00000001;
private const int DDSD_HEIGHT = 0x00000002;
private const int DDSD_WIDTH = 0x00000004;
private const int DDSD_PITCH = 0x00000008;
private const int DDSD_PIXELFORMAT = 0x00001000;
private const int DDSD_MIPMAPCOUNT = 0x00020000;
private const int DDSD_LINEARSIZE = 0x00080000;
private const int DDSD_DEPTH = 0x00800000;
private const int DDSCAPS_COMPLEX = 0x00000008;
private const int DDSCAPS_TEXTURE = 0x00001000;
private const int DDSCAPS_MIPMAP = 0x00400000;
private const int DDSCAPS2_CUBEMAP = 0x00000200;
private const int DDSCAPS2_CUBEMAP_POSITIVEX = 0x00000400;
private const int DDSCAPS2_CUBEMAP_NEGATIVEX = 0x00000800;
private const int DDSCAPS2_CUBEMAP_POSITIVEY = 0x00001000;
private const int DDSCAPS2_CUBEMAP_NEGATIVEY = 0x00002000;
private const int DDSCAPS2_CUBEMAP_POSITIVEZ = 0x00004000;
private const int DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x00008000;
private const int DDSCAPS2_VOLUME = 0x00200000;
private const uint FOURCC_DXT1 = 0x31545844;
private const uint FOURCC_DXT2 = 0x32545844;
private const uint FOURCC_DXT3 = 0x33545844;
private const uint FOURCC_DXT4 = 0x34545844;
private const uint FOURCC_DXT5 = 0x35545844;
private const uint FOURCC_DX10 = 0x30315844;
private const uint FOURCC_V8U8 = 0X38553856; // Only used internally
#endregion
public enum CompressionMode
{
Unknown = 0,
DXT1 = 1,
DXT2 = 2,
DXT3 = 3,
DXT4 = 4,
DXT5 = 5,
V8U8 = 7,
DX10 = 10,
A1R5G5B5 = 15,
RGB15 = 15,
R5G6B5 = 16,
RGB16 = 16,
RGB24 = 24,
RGB32 = 32
}
public DDS_HEADER Header;
#pragma warning disable 0649
public DDS_HEADER_DXT10 Header10;
#pragma warning restore 0649
public DDS_PIXELFORMAT PixelFormat;
public Bitmap[] Images;
public int MipMapCount;
public CompressionMode Format;
public string FormatName
{
get
{
switch (Format)
{
case CompressionMode.A1R5G5B5:
return "ARGB16";
case CompressionMode.R5G6B5:
return "RGB16";
default:
return Format.ToString();
}
}
}
public DDSImage() { }
public static DDSImage Load(string Filename) { using (FileStream _stream = File.OpenRead(Filename)) { return Load(_stream); } }
public static DDSImage Load(byte[] FileContents) { using (MemoryStream _stream = new MemoryStream(FileContents)) { return Load(_stream); } }
public static DDSImage Load(Stream Source)
{
DDSImage _dds = new DDSImage();
using (BinaryReader _data = new BinaryReader(Source))
{
if (_data.ReadInt32() != DDSImage.MAGIC_NUMBER)
{
throw new FileFormatException("DDSImage.Load() requires a .dds texture file stream");
}
_dds.Format = CompressionMode.Unknown;
_dds.Header.dwSize = _data.ReadInt32();
_dds.Header.dwFlags = _data.ReadInt32();
_dds.Header.dwHeight = _data.ReadInt32();
_dds.Header.dwWidth = _data.ReadInt32();
_dds.Header.dwPitchOrLinearSize = _data.ReadInt32();
_dds.Header.dwDepth = _data.ReadInt32();
_dds.Header.dwMipMapCount = _data.ReadInt32();
// Unused Reserved1 Fields
_data.ReadBytes(11 * sizeof(int));
// Image Pixel Format
_dds.PixelFormat.dwSize = _data.ReadUInt32();
_dds.PixelFormat.dwFlags = _data.ReadUInt32();
_dds.PixelFormat.dwFourCC = _data.ReadUInt32();
_dds.PixelFormat.dwRGBBitCount = _data.ReadUInt32();
_dds.PixelFormat.dwRBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwGBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwBBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwABitMask = _data.ReadUInt32();
_dds.Header.dwCaps = _data.ReadInt32();
_dds.Header.dwCaps2 = _data.ReadInt32();
_dds.Header.dwCaps3 = _data.ReadInt32();
_dds.Header.dwCaps4 = _data.ReadInt32();
_dds.Header.dwReserved2 = _data.ReadInt32();
if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) != 0)
{
switch (_dds.PixelFormat.dwFourCC)
{
case FOURCC_DX10:
_dds.Format = CompressionMode.DX10;
throw new System.IO.FileFormatException("DX10 textures not supported at this time.");
case FOURCC_DXT1:
_dds.Format = CompressionMode.DXT1;
break;
case FOURCC_DXT2:
_dds.Format = CompressionMode.DXT2;
break;
case FOURCC_DXT3:
_dds.Format = CompressionMode.DXT3;
break;
case FOURCC_DXT4:
_dds.Format = CompressionMode.DXT4;
break;
case FOURCC_DXT5:
_dds.Format = CompressionMode.DXT5;
break;
default:
switch (_dds.PixelFormat.dwFourCC)
{
default:
break;
}
throw new System.IO.FileFormatException("Unsupported compression format");
}
}
if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) == 0)
{
// Uncompressed. How many BPP?
bool _supportedBpp = false;
switch (_dds.PixelFormat.dwRGBBitCount)
{
case 16:
if (_dds.PixelFormat.dwABitMask == 0)
{
_dds.Format = CompressionMode.R5G6B5;
}
else
{
_dds.Format = CompressionMode.A1R5G5B5;
}
_supportedBpp = true;
break;
case 24:
_dds.Format = CompressionMode.RGB24;
_supportedBpp = true;
break;
case 32:
_dds.Format = CompressionMode.RGB32;
_supportedBpp = true;
break;
}
if (!_supportedBpp)
{
throw new Exception("Only 16, 24, and 32-bit pixel formats are supported for uncompressed textures.");
}
}
_dds.MipMapCount = 1;
if ((_dds.Header.dwFlags & DDSD_MIPMAPCOUNT) != 0)
{
_dds.MipMapCount = (_dds.Header.dwMipMapCount == 0) ? 1 : _dds.Header.dwMipMapCount;
}
_dds.Images = new Bitmap[_dds.MipMapCount];
int _imageSize;
int _w = (_dds.Header.dwWidth < 0) ? -_dds.Header.dwWidth : _dds.Header.dwWidth;
int _h = (_dds.Header.dwHeight < 0) ? -_dds.Header.dwHeight : _dds.Header.dwHeight;
// DDS Documentation recommends ignoring the dwLinearOrPitchSize value and calculating on your own.
if ((_dds.PixelFormat.dwFlags & DDPF_RGB) != 0)
{
// Linear Size
_imageSize = (_w * _h * ((int)_dds.PixelFormat.dwRGBBitCount + 7) >> 3);
}
else
{
// Compressed
_imageSize = ((_w + 3) >> 2) * (((_h + 3) >> 2));
switch (_dds.PixelFormat.dwFourCC)
{
case FOURCC_DXT1:
_imageSize <<= 3; // 64 bits color per block
break;
case FOURCC_DXT2:
case FOURCC_DXT3:
_imageSize <<= 4; // 64 bits alpha + 64 bits color per block
break;
case FOURCC_DXT4:
case FOURCC_DXT5:
_imageSize <<= 4; // 64 bits alpha + 64 bits color per block
break;
}
}
byte[] _imageBits;
for (int _level = 0; _level < _dds.MipMapCount; _level++)
{
try
{
_imageBits = _data.ReadBytes(_imageSize >> (_level << 1));
int _w2 = _w >> _level;
int _h2 = _h >> _level;
uint _compressionMode = _dds.PixelFormat.dwFourCC;
if ((_dds.PixelFormat.dwFlags & DDPF_RGB) != 0)
{
_compressionMode = (uint)_dds.Format;
}
else if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) == 0 &&
_dds.PixelFormat.dwRGBBitCount == 16 &&
_dds.PixelFormat.dwRBitMask == 0x00FF &&
_dds.PixelFormat.dwGBitMask == 0xFF00 &&
_dds.PixelFormat.dwBBitMask == 0x0000 &&
_dds.PixelFormat.dwABitMask == 0x0000)
{
_dds.Format = CompressionMode.V8U8;
_compressionMode = FOURCC_V8U8;
}
_dds.Images[_level] = Decompress.Image(_imageBits, _w2, _h2, _compressionMode);
}
catch
{
// Unexpected end of file. Perhaps mipmaps weren't fully written to file.
// We'll at least provide them with what we've extracted so far.
_dds.MipMapCount = _level;
if (_level == 0)
{
_dds.Images = null;
throw new FileFormatException("Unable to read pixel data.");
}
else
{
Array.Resize<Bitmap>(ref _dds.Images, _level);
}
}
}
}
return _dds;
}
private class Decompress
{
public static Bitmap Image(byte[] Data, int W, int H, uint CompressionMode)
{
Bitmap _img = new Bitmap((W < 4) ? 4 : W, (H < 4) ? 4 : H);
switch (CompressionMode)
{
case 15:
case 16:
case 24:
case 32:
return Linear(Data, W, H, CompressionMode);
}
// https://msdn.microsoft.com/en-us/library/bb147243%28v=vs.85%29.aspx
// Gain direct access to the surface's bits
BitmapData _bits = _img.LockBits(new Rectangle(0, 0, _img.Width, _img.Height), ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
IntPtr _bitPtr = _bits.Scan0;
// Convert byte[] data into 16-bit ushorts per Microsoft design/documentation
ushort[] _bpp16 = new ushort[Data.Length >> 1];
Buffer.BlockCopy(Data, 0, _bpp16, 0, Data.Length);
// Checking for negative stride per documentation just to be safe, but I don't think bottom-up format is supported with DXT1.
// Converting from bytes to ushorts for _bpp16
Int32 _stride = (((_bits.Stride < 0) ? -_bits.Stride : _bits.Stride) >> 2);
// Our actual pixel data as it is decompressed
Int32[] _pixels = new Int32[_stride * _bits.Height];
// Decompress the blocks
switch (CompressionMode)
{
case FOURCC_DXT1:
DXT1(_bpp16, _pixels, W, H, _stride);
break;
case FOURCC_DXT2:
case FOURCC_DXT3:
DXT3(_bpp16, _pixels, W, H, _stride);
break;
case FOURCC_DXT4:
case FOURCC_DXT5:
DXT5(_bpp16, _pixels, W, H, _stride);
break;
case FOURCC_V8U8:
V8U8(_bpp16, _pixels, W, H, _stride);
break;
default:
_pixels = null;
break;
}
// Copy our decompressed bits back into the surface
if (_pixels != null)
{
System.Runtime.InteropServices.Marshal.Copy(_pixels, 0, _bitPtr, _stride * _bits.Height);
}
// We're done!
_img.UnlockBits(_bits);
if (_pixels == null)
{
throw new FileFormatException(string.Format("DDS compression Mode '{0}{0}{0}{0}' not supported.",
(char)(CompressionMode & 0xFF),
(char)((CompressionMode >> 8) & 0xFF),
(char)((CompressionMode >> 16) & 0xFF),
(char)((CompressionMode >> 24) & 0xFF)));
}
return _img;
}
private static void DXT1(ushort[] Data, Int32[] Pixels, int W, int H, int Stride)
{
UInt32[] _color = new UInt32[4];
int _pos = 0;
int _stride2 = Stride - 4;
for (int _y = 0; _y < H; _y += 4)
{
for (int _x = 0; _x < W; _x += 4)
{
ushort _c1 = Data[_pos++];
ushort _c2 = Data[_pos++];
bool _isAlpha = (_c1 < _c2);
uint _r1 = (byte)((_c1 >> 11) & 0x1F);
uint _g1 = (byte)((_c1 & 0x07E0) >> 5);
uint _b1 = (byte)(_c1 & 0x001F);
uint _r2 = (byte)((_c2 >> 11) & 0x1F);
uint _g2 = (byte)((_c2 & 0x07E0) >> 5);
uint _b2 = (byte)(_c2 & 0x001F);
_r1 = (_r1 << 3) + (_r1 >> 2);
_g1 = (_g1 << 2) + (_g1 >> 4);
_b1 = (_b1 << 3) + (_b1 >> 2);
_r2 = (_r2 << 3) + (_r2 >> 2);
_g2 = (_g2 << 2) + (_g2 >> 4);
_b2 = (_b2 << 3) + (_b2 >> 2);
uint _a = unchecked((uint)(0xFF << 24));
if (_isAlpha)
{
_color[0] = _a | _r1 << 16 | _g1 << 8 | _b1;
_color[1] = _a | _r2 << 16 | _g2 << 8 | _b2;
_color[2] = _a | (((_r1 + _r2) >> 1) << 16) | (((_g1 + _g2) >> 1) << 8) | ((_b1 + _b2) >> 1);
_color[3] = 0x00000000; // Transparent pixel
}
else
{
_color[0] = _a | _r1 << 16 | _g1 << 8 | _b1;
_color[1] = _a | _r2 << 16 | _g2 << 8 | _b2;
_color[2] = _a | ((((_r2 * 3) + (_r1 * 6)) / 9) << 16) | ((((_g2 * 3) + (_g1 * 6)) / 9) << 8) | (((_b2 * 3) + (_b1 * 6)) / 9);
_color[3] = _a | ((((_r1 * 3) + (_r2 * 6)) / 9) << 16) | ((((_g1 * 3) + (_g2 * 6)) / 9) << 8) | (((_b1 * 3) + (_b2 * 6)) / 9);
}
int _pixel = _y * Stride + _x;
ushort _code = Data[_pos++];
Pixels[_pixel++] = unchecked((int)_color[_code & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] = unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 14 & 0x03]);
_pixel += _stride2;
_code = Data[_pos++];
Pixels[_pixel++] = unchecked((int)_color[_code & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] = unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] = unchecked((int)_color[_code >> 14 & 0x03]);
}
}
}
private static void DXT3(ushort[] Data, Int32[] Pixels, int W, int H, int Stride)
{
ushort[] _alpha = new ushort[4];
int _pos = 0;
int _stride2 = Stride - 4;
for (int _y = 0; _y < H; _y += 4)
{
for (int _x = 0; _x < W; _x += 4)
{
for (int _i = 0; _i < 4; _i++)
{
_alpha[_i] = Data[_pos++];
}
int _pixel = _y * Stride + _x;
for (int _i = 0; _i < 4; _i++)
{
Pixels[_pixel++] = (((_alpha[_i] >> 0) & 0x000F) * 255 / 15) << 24;
Pixels[_pixel++] = (((_alpha[_i] >> 4) & 0x000F) * 255 / 15) << 24;
Pixels[_pixel++] = (((_alpha[_i] >> 8) & 0x000F) * 255 / 15) << 24;
Pixels[_pixel++] = (((_alpha[_i] >> 12) & 0x000F) * 255 / 15) << 24;
_pixel += _stride2;
}
UInt32[] _color = new UInt32[4];
ushort _c1 = Data[_pos++];
ushort _c2 = Data[_pos++];
uint _r1 = (byte)((_c1 >> 11) & 0x1F);
uint _g1 = (byte)((_c1 & 0x07E0) >> 5);
uint _b1 = (byte)(_c1 & 0x001F);
uint _r2 = (byte)((_c2 >> 11) & 0x1F);
uint _g2 = (byte)((_c2 & 0x07E0) >> 5);
uint _b2 = (byte)(_c2 & 0x001F);
_r1 = (_r1 << 3) + (_r1 >> 2);
_g1 = (_g1 << 2) + (_g1 >> 4);
_b1 = (_b1 << 3) + (_b1 >> 2);
_r2 = (_r2 << 3) + (_r2 >> 2);
_g2 = (_g2 << 2) + (_g2 >> 4);
_b2 = (_b2 << 3) + (_b2 >> 2);
_color[0] = _r1 << 16 | _g1 << 8 | _b1;
_color[1] = _r2 << 16 | _g2 << 8 | _b2;
_color[2] = ((((_r2 * 3) + (_r1 * 6)) / 9) << 16) | ((((_g2 * 3) + (_g1 * 6)) / 9) << 8) | (((_b2 * 3) + (_b1 * 6)) / 9);
_color[3] = ((((_r1 * 3) + (_r2 * 6)) / 9) << 16) | ((((_g1 * 3) + (_g2 * 6)) / 9) << 8) | (((_b1 * 3) + (_b2 * 6)) / 9);
_pixel = _y * Stride + _x;
ushort _code = Data[_pos++];
Pixels[_pixel++] |= unchecked((int)_color[_code & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] |= unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 14 & 0x03]);
_pixel += _stride2;
_code = Data[_pos++];
Pixels[_pixel++] |= unchecked((int)_color[_code & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] |= unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 14 & 0x03]);
}
}
}
private static void DXT5(ushort[] Data, Int32[] Pixels, int W, int H, int Stride)
{
UInt32[] _color = new UInt32[4];
ushort[] _alpha = new ushort[8];
ushort[] _alphaBits = new ushort[3];
ushort _alphaCode;
int _pos = 0;
int _stride2 = Stride - 4;
ushort _code;
for (int _y = 0; _y < H; _y += 4)
{
for (int _x = 0; _x < W; _x += 4)
{
_alpha[0] = (ushort)(Data[_pos] & 0xFF);
_alpha[1] = (ushort)(Data[_pos++] >> 8);
if (_alpha[0] > _alpha[1])
{
// 8 alpha block
_alpha[2] = (ushort)((6 * _alpha[0] + 1 * _alpha[1] + 3) / 7);
_alpha[3] = (ushort)((5 * _alpha[0] + 2 * _alpha[1] + 3) / 7);
_alpha[4] = (ushort)((4 * _alpha[0] + 3 * _alpha[1] + 3) / 7);
_alpha[5] = (ushort)((3 * _alpha[0] + 4 * _alpha[1] + 3) / 7);
_alpha[6] = (ushort)((2 * _alpha[0] + 5 * _alpha[1] + 3) / 7);
_alpha[7] = (ushort)((1 * _alpha[0] + 6 * _alpha[1] + 3) / 7);
}
else
{
// 6 alpha block
_alpha[2] = (ushort)((4 * _alpha[0] + 1 * _alpha[1] + 2) / 5);
_alpha[3] = (ushort)((3 * _alpha[0] + 2 * _alpha[1] + 2) / 5);
_alpha[4] = (ushort)((2 * _alpha[0] + 3 * _alpha[1] + 2) / 5);
_alpha[5] = (ushort)((1 * _alpha[0] + 4 * _alpha[1] + 2) / 5);
_alpha[6] = 0;
_alpha[7] = 0xFF;
}
for (int _i = 0; _i < 3; _i++)
{
_alphaBits[_i] = Data[_pos++];
}
int _pixel = _y * Stride + _x;
_alphaCode = _alphaBits[0];
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24;
_pixel += _stride2;
_alphaCode = (ushort)((_alphaBits[0] >> 12) | (_alphaBits[1] << 4));
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24;
_pixel += _stride2;
_alphaCode = (ushort)((_alphaBits[1] >> 8) | (_alphaBits[2] << 8));
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24;
_pixel += _stride2;
_alphaCode = (ushort)(_alphaBits[2] >> 4);
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24; _alphaCode >>= 3;
Pixels[_pixel++] = _alpha[_alphaCode & 0x0007] << 24;
ushort _c1 = Data[_pos++];
ushort _c2 = Data[_pos++];
uint _r1 = (byte)((_c1 >> 11) & 0x1F);
uint _g1 = (byte)((_c1 & 0x07E0) >> 5);
uint _b1 = (byte)(_c1 & 0x001F);
uint _r2 = (byte)((_c2 >> 11) & 0x1F);
uint _g2 = (byte)((_c2 & 0x07E0) >> 5);
uint _b2 = (byte)(_c2 & 0x001F);
_r1 = (_r1 << 3) + (_r1 >> 2);
_g1 = (_g1 << 2) + (_g1 >> 4);
_b1 = (_b1 << 3) + (_b1 >> 2);
_r2 = (_r2 << 3) + (_r2 >> 2);
_g2 = (_g2 << 2) + (_g2 >> 4);
_b2 = (_b2 << 3) + (_b2 >> 2);
_color[0] = _r1 << 16 | _g1 << 8 | _b1;
_color[1] = _r2 << 16 | _g2 << 8 | _b2;
_color[2] = ((((_r2 * 1) + (_r1 * 2)) / 3) << 16) | ((((_g2 * 1) + (_g1 * 2)) / 3) << 8) | (((_b2 * 1) + (_b1 * 2)) / 3);
_color[3] = ((((_r1 * 1) + (_r2 * 2)) / 3) << 16) | ((((_g1 * 1) + (_g2 * 2)) / 3) << 8) | (((_b1 * 1) + (_b2 * 2)) / 3);
_pixel = _y * Stride + _x;
_code = Data[_pos++];
Pixels[_pixel++] |= unchecked((int)_color[_code >> 0 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] |= unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 14 & 0x03]);
_pixel += _stride2;
_code = Data[_pos++];
Pixels[_pixel++] |= unchecked((int)_color[_code >> 0 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 2 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 4 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 6 & 0x03]);
_pixel += _stride2;
Pixels[_pixel++] |= unchecked((int)_color[_code >> 8 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 10 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 12 & 0x03]);
Pixels[_pixel++] |= unchecked((int)_color[_code >> 14 & 0x03]);
}
}
}
private static void V8U8(ushort[] Data, Int32[] Pixels, int W, int H, int Stride)
{
int _pos = 0;
for (int _y = 0; _y < H; _y++)
{
int _pixel = _y * Stride;
for (int _x = 0; _x < W; _x++)
{
Pixels[_pixel++] = unchecked((int)(Data[_pos++] ^ 0xFFFFFFFF));
}
}
}
private static Bitmap Linear(byte[] Data, int W, int H, uint bpp)
{
Bitmap _img = new Bitmap(W, H);
int _a, _r, _g, _b, _c, _pos;
BitmapData _bits = _img.LockBits(new Rectangle(0, 0, _img.Width, _img.Height), ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
IntPtr _bitPtr = _bits.Scan0;
Int32 _stride = (((_bits.Stride < 0) ? -_bits.Stride : _bits.Stride) >> 2);
Int32[] _pixels = new Int32[_stride * _bits.Height];
switch (bpp)
{
case 15: // CompressionMode.A1R5G5B5:
_pos = 0;
for (int _y = 0; _y < H; _y++)
{
int _xy = _y * (_bits.Stride >> 2);
for (int _x = 0; _x < W; _x++)
{
_c = Data[_pos++];
_c |= Data[_pos++] << 8;
_a = (_c & 0x8000) == 0 ? 0 : 0xFF;
_r = ((_c & 0x7C00) >> 10) * 255 / 31;
_g = ((_c & 0x03E0) >> 5) * 255 / 31;
_b = (_c & 0x001F) * 255 / 31;
_pixels[_xy++] = _a << 24 | _r << 16 | _g << 8 | _b;
}
}
break;
case 16: // CompressionMode.R5G6B5:
_pos = 0;
_a = 0xFF << 24;
for (int _y = 0; _y < H; _y++)
{
int _xy = _y * (_bits.Stride >> 2);
for (int _x = 0; _x < W; _x++)
{
_c = Data[_pos++];
_c |= Data[_pos++] << 8;
_r = ((_c & 0xF800) >> 11) * 255 / 31;
_g = ((_c & 0x07E0) >> 5) * 255 / 63;
_b = (_c & 0x001F) * 255 / 31;
_pixels[_xy++] = _a | _r << 16 | _g << 8 | _b;
}
}
break;
case 24: // R8G8B8
_a = 0xFF << 24;
using (BinaryReader _reader = new BinaryReader(new MemoryStream(Data)))
{
_reader.BaseStream.Seek(0, SeekOrigin.Begin);
for (int _y = 0; _y < _img.Height; _y++)
{
int _xy = ((_bits.Stride < 0) ? (_img.Height - _y) : _y) * _stride;
for (int _x = 0; _x < _img.Width; _x++)
{
_b = _reader.ReadByte();
_g = _reader.ReadByte();
_r = _reader.ReadByte();
_pixels[_xy++] = _a | (_r << 16) | (_g << 8) | _b;
}
}
}
break;
case 32: // A8R8G8B8
Int32[] _bpp32 = new Int32[Data.Length >> 2];
Buffer.BlockCopy(Data, 0, _bpp32, 0, Data.Length);
if ((_stride == _img.Width) && (_bits.Stride > 0))
{
// Cohesive block of pixel data. No need to go row by row.
Array.Copy(_bpp32, _pixels, _pixels.Length);
}
else
{
for (int _y = 0; _y < _img.Height; _y++)
{
// if Stride < 0, image is stored from the bottom up, so we have to invert our _y
int _xy1 = ((_bits.Stride < 0) ? (_img.Height - _y) : _y) * _stride;
int _xy2 = _y * W;
Array.Copy(_bpp32, _xy2, _pixels, _xy1, _stride);
}
}
break;
}
System.Runtime.InteropServices.Marshal.Copy(_pixels, 0, _bitPtr, _stride * _bits.Height);
_img.UnlockBits(_bits);
return _img;
}
}
public static bool Save(DDSImage Image, string Filename, CompressionMode Format)
{
try
{
return Save(Image.Images[0], Filename, Format);
}
catch
{
return false;
}
}
public static bool Save(DDSImage Image, Stream Stream, CompressionMode Format)
{
try
{
return Save(Image.Images[0], Stream, Format);
}
catch
{
return false;
}
}
public static bool Save(Bitmap Picture, string Filename, CompressionMode Format)
{
try
{
using (FileStream _stream = File.OpenWrite(Filename))
{
return Save(Picture, _stream, Format);
}
}
catch
{
return false;
}
}
public static bool Save(Bitmap Picture, Stream Stream, CompressionMode Format)
{
if ((Picture == null) || (Stream == null))
{
return false;
}
switch (Format)
{
case CompressionMode.A1R5G5B5:
break;
case CompressionMode.R5G6B5:
break;
case CompressionMode.RGB24:
break;
case CompressionMode.RGB32:
break;
default:
return false;
}
uint _bpp = (uint)Format;
List<Bitmap> _mipMaps = new List<Bitmap>();
_mipMaps.Add(Picture);
try
{
while (true)
{
int _w = Picture.Width >> _mipMaps.Count;
int _h = Picture.Height >> _mipMaps.Count;
if ((_w < 4) || (_h < 4))
{
break;
}
Bitmap _map = new Bitmap(_w, _h);
using (Graphics _blitter = Graphics.FromImage(_map))
{
_blitter.InterpolationMode = InterpolationMode.HighQualityBicubic;
using (ImageAttributes _wrapMode = new System.Drawing.Imaging.ImageAttributes())
{
_wrapMode.SetWrapMode(WrapMode.TileFlipXY);
_blitter.DrawImage(Picture, new Rectangle(0, 0, _w, _h), 0, 0, Picture.Width, Picture.Height, GraphicsUnit.Pixel, _wrapMode);
}
}
_mipMaps.Add(_map);
}
DDS_HEADER _header;
DDS_PIXELFORMAT _format;
using (BinaryWriter _stream = new BinaryWriter(Stream))
{
_stream.Write(0x20534444); // Magic Number ("DDS ")
uint _hasAlpha = ((Picture.PixelFormat & System.Drawing.Imaging.PixelFormat.Alpha) != 0) ? 1u : 0u;
_format.dwSize = 32;
_format.dwFlags = DDPF_RGB | (DDPF_ALPHAPIXELS * _hasAlpha);
_format.dwFourCC = 0;
switch (Format)
{
case CompressionMode.R5G6B5:
_format.dwRGBBitCount = 16;
_format.dwABitMask = 0x0000;
_format.dwRBitMask = 0xF800;
_format.dwGBitMask = 0x07E0;
_format.dwBBitMask = 0x001F;
break;
case CompressionMode.A1R5G5B5:
_format.dwRGBBitCount = 16;
_format.dwABitMask = 0x8000;
_format.dwRBitMask = 0x7C00;
_format.dwGBitMask = 0x03E0;
_format.dwBBitMask = 0x001F;
break;
case CompressionMode.RGB24:
_format.dwRGBBitCount = 24;
_format.dwABitMask = 0x00000000;
_format.dwRBitMask = 0x00ff0000;
_format.dwGBitMask = 0x0000ff00;
_format.dwBBitMask = 0x000000ff;
break;
case CompressionMode.RGB32:
default:
_format.dwRGBBitCount = 32;
_format.dwABitMask = 0xff000000 * _hasAlpha;
_format.dwRBitMask = 0x00ff0000;
_format.dwGBitMask = 0x0000ff00;
_format.dwBBitMask = 0x000000ff;
break;
}
_header.dwSize = 124;
_header.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT | DDSD_MIPMAPCOUNT | DDSD_PITCH;
_header.dwHeight = Picture.Height;
_header.dwWidth = Picture.Width;
_header.dwPitchOrLinearSize = (int)(_header.dwWidth * _header.dwHeight * (_format.dwRGBBitCount >> 3));
_header.dwDepth = 0;
_header.dwMipMapCount = _mipMaps.Count;
_header.dwCaps = DDSCAPS_COMPLEX | DDSCAPS_TEXTURE | DDSCAPS_MIPMAP;
_header.dwCaps2 = 0;
_header.dwCaps3 = 0;
_header.dwCaps4 = 0;
_header.dwReserved2 = 0;
_stream.Write(_header.dwSize);
_stream.Write(_header.dwFlags);
_stream.Write(_header.dwHeight);
_stream.Write(_header.dwWidth);
_stream.Write(_header.dwPitchOrLinearSize);
_stream.Write(_header.dwDepth);
_stream.Write(_header.dwMipMapCount);
for (int _i = 0; _i < 11; _i++)
{
_stream.Write((uint)0);
}
_stream.Write(_format.dwSize);
_stream.Write(_format.dwFlags);
_stream.Write(_format.dwFourCC);
_stream.Write(_format.dwRGBBitCount);
_stream.Write(_format.dwRBitMask);
_stream.Write(_format.dwGBitMask);
_stream.Write(_format.dwBBitMask);
_stream.Write(_format.dwABitMask);
_stream.Write(_header.dwCaps);
_stream.Write(_header.dwCaps2);
_stream.Write(_header.dwCaps3);