private static SubStream GetChunkData(SubStream data, long offset)
{
int totalsize = (((12 + (int)data.GetByte(offset + 6) + 7) & -8) + data.GetInt32(offset + 8) + 7) & -8;
return new SubStream(data, offset, totalsize);
}
private static SubStream GetChunkData(SubStream data, long offset)
{
int totalsize = (((12 + (int)data.GetByte(offset + 6) + 7) & -8) + data.GetInt32(offset + 8) + 7) & -8;
return(new SubStream(data, offset, totalsize));
}
public DDSImage(SubStream data)
{
if (data.GetByte(0) == 'D' && data.GetByte(1) == 'D' && data.GetByte(2) == 'S' && data.GetByte(3) == ' ')
{
Height = data.GetInt32(12);
Width = data.GetInt32(16);
Depth = data.GetInt32(24);
Flags = data.GetUInt32(8);
Pitch = data.GetInt32(20);
FourCC = Encoding.ASCII.GetString(data.GetBytes(84, 4));
RGBBitCount = data.GetInt32(88);
RedMask = data.GetUInt32(92);
GreenMask = data.GetUInt32(96);
BlueMask = data.GetUInt32(100);
AlphaMask = data.GetUInt32(104);
Data = data;
ImageOffset = 128;
if (Depth == 0)
{
Depth = 1;
}
if ((Flags & 8) == 0)
{
Pitch = Width * RGBBitCount / 8;
}
IsARGB32 = (FourCC == "DXT1" || FourCC == "DXT2" || FourCC == "DXT3" || FourCC == "DXT4" || FourCC == "DXT5" || FourCC == "\0\0\0\0");
IntensityFactor = 1.0;
try
{
FailureReason = null;
switch (FourCC)
{
case "DXT1":
Bitmap = GetBitmapFromDDS_DXT1(Data, ImageOffset, Width, Height, out HasAlpha);
break;
case "DXT2":
Bitmap = GetBitmapFromDDS_DXT3(Data, ImageOffset, Width, Height, true, out HasAlpha);
break;
case "DXT3":
Bitmap = GetBitmapFromDDS_DXT3(Data, ImageOffset, Width, Height, false, out HasAlpha);
break;
case "DXT4":
Bitmap = GetBitmapFromDDS_DXT5(Data, ImageOffset, Width, Height, true, out HasAlpha);
break;
case "DXT5":
Bitmap = GetBitmapFromDDS_DXT5(Data, ImageOffset, Width, Height, false, out HasAlpha);
break;
case "\0\0\0\0":
Bitmap = GetBitmapFromDDS_RAW(Data, ImageOffset, Width, Height, Pitch, RGBBitCount, RedMask, GreenMask, BlueMask, AlphaMask, out HasAlpha, out IsARGB32);
break;
case "q\0\0\0":
Bitmap = GetBitmapFromDDS_ARGB16F(Data, ImageOffset, Width, Height, out HasAlpha, out IntensityFactor);
break;
default:
Bitmap = null;
FailureReason = String.Format("Unknown DDS FourCC {0:X2}:{1:X2}:{2:X2}:{3:X2}", Data.GetByte(84), Data.GetByte(85), Data.GetByte(86), Data.GetByte(87));
break;
}
}
catch (Exception ex)
{
Bitmap = null;
FailureReason = ex.Message;
}
}
else
{
throw new NotImplementedException(String.Format("Unknown file format {0:X2}:{1:X2}:{2:X2}:{3:X2}", data.GetByte(0), data.GetByte(1), data.GetByte(2), data.GetByte(3)));
}
}
protected static Bitmap GetBitmapFromDDS_DXT5(SubStream data, int offset, int width, int height, bool IsDXT4, out bool hasalpha)
{
Bitmap bmp = new Bitmap(width, height, IsDXT4 ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb);
byte[] bmpraw = new byte[width * height * 4];
hasalpha = false;
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
byte[] a = new byte[8];
a[0] = data.GetByte(offset);
a[1] = data.GetByte(offset + 1);
if (a[0] > a[1])
{
a[2] = (byte)(((int)a[0] * 6 + a[1] * 1 + 3) / 7);
a[3] = (byte)(((int)a[0] * 5 + a[1] * 2 + 3) / 7);
a[4] = (byte)(((int)a[0] * 4 + a[1] * 3 + 3) / 7);
a[5] = (byte)(((int)a[0] * 3 + a[1] * 4 + 3) / 7);
a[6] = (byte)(((int)a[0] * 2 + a[1] * 5 + 3) / 7);
a[7] = (byte)(((int)a[0] * 1 + a[1] * 6 + 3) / 7);
}
else
{
a[2] = (byte)(((int)a[0] * 4 + a[1] * 1 + 2) / 5);
a[3] = (byte)(((int)a[0] * 3 + a[1] * 2 + 2) / 5);
a[4] = (byte)(((int)a[0] * 2 + a[1] * 3 + 2) / 5);
a[5] = (byte)(((int)a[0] * 1 + a[1] * 4 + 2) / 5);
a[6] = 0x00;
a[7] = 0xFF;
}
ulong alphasel = data.GetUInt64(offset) >> 16;
byte[,] alphadata = new byte[4, 4];
for (int i = 0; i < 16; i++)
{
alphadata[i % 4, i / 4] = a[(alphasel >> (i * 3)) & 7];
}
Color[,] colourdata = GetDXT1ColourBlock(data, offset + 8, true);
for (int v = 0; v < 4; v++)
{
for (int u = 0; u < 4; u++)
{
if (x + u < width && y + v < height)
{
int i = ((y + v) * width + (x + u)) * 4;
bmpraw[i] = colourdata[u, v].B;
bmpraw[i + 1] = colourdata[u, v].G;
bmpraw[i + 2] = colourdata[u, v].R;
bmpraw[i + 3] = alphadata[u, v];
hasalpha |= alphadata[u, v] != 255;
}
}
}
offset += 16;
}
}
BitmapData bmpdata = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, IsDXT4 ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb);
for (int y = 0; y < height; y++)
{
Marshal.Copy(bmpraw, y * width * 4, bmpdata.Scan0 + y * bmpdata.Stride, width * 4);
}
bmp.UnlockBits(bmpdata);
return bmp;
}
public DDSImage(SubStream data)
{
if (data.GetByte(0) == 'D' && data.GetByte(1) == 'D' && data.GetByte(2) == 'S' && data.GetByte(3) == ' ')
{
Height = data.GetInt32(12);
Width = data.GetInt32(16);
Depth = data.GetInt32(24);
Flags = data.GetUInt32(8);
Pitch = data.GetInt32(20);
FourCC = Encoding.ASCII.GetString(data.GetBytes(84, 4));
RGBBitCount = data.GetInt32(88);
RedMask = data.GetUInt32(92);
GreenMask = data.GetUInt32(96);
BlueMask = data.GetUInt32(100);
AlphaMask = data.GetUInt32(104);
Data = data;
ImageOffset = 128;
if (Depth == 0)
{
Depth = 1;
}
if ((Flags & 8) == 0)
{
Pitch = Width * RGBBitCount / 8;
}
IsARGB32 = (FourCC == "DXT1" || FourCC == "DXT2" || FourCC == "DXT3" || FourCC == "DXT4" || FourCC == "DXT5" || FourCC == "\0\0\0\0");
IntensityFactor = 1.0;
try
{
FailureReason = null;
switch (FourCC)
{
case "DXT1":
Bitmap = GetBitmapFromDDS_DXT1(Data, ImageOffset, Width, Height, out HasAlpha);
break;
case "DXT2":
Bitmap = GetBitmapFromDDS_DXT3(Data, ImageOffset, Width, Height, true, out HasAlpha);
break;
case "DXT3":
Bitmap = GetBitmapFromDDS_DXT3(Data, ImageOffset, Width, Height, false, out HasAlpha);
break;
case "DXT4":
Bitmap = GetBitmapFromDDS_DXT5(Data, ImageOffset, Width, Height, true, out HasAlpha);
break;
case "DXT5":
Bitmap = GetBitmapFromDDS_DXT5(Data, ImageOffset, Width, Height, false, out HasAlpha);
break;
case "\0\0\0\0":
Bitmap = GetBitmapFromDDS_RAW(Data, ImageOffset, Width, Height, Pitch, RGBBitCount, RedMask, GreenMask, BlueMask, AlphaMask, out HasAlpha, out IsARGB32);
break;
case "q\0\0\0":
Bitmap = GetBitmapFromDDS_ARGB16F(Data, ImageOffset, Width, Height, out HasAlpha, out IntensityFactor);
break;
default:
Bitmap = null;
FailureReason = String.Format("Unknown DDS FourCC {0:X2}:{1:X2}:{2:X2}:{3:X2}", Data.GetByte(84), Data.GetByte(85), Data.GetByte(86), Data.GetByte(87));
break;
}
}
catch (Exception ex)
{
Bitmap = null;
FailureReason = ex.Message;
}
}
else
{
throw new NotImplementedException(String.Format("Unknown file format {0:X2}:{1:X2}:{2:X2}:{3:X2}", data.GetByte(0), data.GetByte(1), data.GetByte(2), data.GetByte(3)));
}
}
protected static Bitmap GetBitmapFromDDS_DXT5(SubStream data, int offset, int width, int height, bool IsDXT4, out bool hasalpha)
{
Bitmap bmp = new Bitmap(width, height, IsDXT4 ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb);
byte[] bmpraw = new byte[width * height * 4];
hasalpha = false;
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
byte[] a = new byte[8];
a[0] = data.GetByte(offset);
a[1] = data.GetByte(offset + 1);
if (a[0] > a[1])
{
a[2] = (byte)(((int)a[0] * 6 + a[1] * 1 + 3) / 7);
a[3] = (byte)(((int)a[0] * 5 + a[1] * 2 + 3) / 7);
a[4] = (byte)(((int)a[0] * 4 + a[1] * 3 + 3) / 7);
a[5] = (byte)(((int)a[0] * 3 + a[1] * 4 + 3) / 7);
a[6] = (byte)(((int)a[0] * 2 + a[1] * 5 + 3) / 7);
a[7] = (byte)(((int)a[0] * 1 + a[1] * 6 + 3) / 7);
}
else
{
a[2] = (byte)(((int)a[0] * 4 + a[1] * 1 + 2) / 5);
a[3] = (byte)(((int)a[0] * 3 + a[1] * 2 + 2) / 5);
a[4] = (byte)(((int)a[0] * 2 + a[1] * 3 + 2) / 5);
a[5] = (byte)(((int)a[0] * 1 + a[1] * 4 + 2) / 5);
a[6] = 0x00;
a[7] = 0xFF;
}
ulong alphasel = data.GetUInt64(offset) >> 16;
byte[,] alphadata = new byte[4, 4];
for (int i = 0; i < 16; i++)
{
alphadata[i % 4, i / 4] = a[(alphasel >> (i * 3)) & 7];
}
Color[,] colourdata = GetDXT1ColourBlock(data, offset + 8, true);
for (int v = 0; v < 4; v++)
{
for (int u = 0; u < 4; u++)
{
if (x + u < width && y + v < height)
{
int i = ((y + v) * width + (x + u)) * 4;
bmpraw[i] = colourdata[u, v].B;
bmpraw[i + 1] = colourdata[u, v].G;
bmpraw[i + 2] = colourdata[u, v].R;
bmpraw[i + 3] = alphadata[u, v];
hasalpha |= alphadata[u, v] != 255;
}
}
}
offset += 16;
}
}
BitmapData bmpdata = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, IsDXT4 ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb);
for (int y = 0; y < height; y++)
{
Marshal.Copy(bmpraw, y * width * 4, bmpdata.Scan0 + y * bmpdata.Stride, width * 4);
}
bmp.UnlockBits(bmpdata);
return(bmp);
}