public void Deserialize(UnityBinaryReader reader)
{
dwSize = reader.ReadLEUInt32();
if (dwSize != 124)
{
throw new FileFormatException("Invalid DDS file header size: " + dwSize.ToString() + '.');
}
dwFlags = reader.ReadLEUInt32();
if (!Utils.ContainsBitFlags(dwFlags, (uint)DDSFlags.Height, (uint)DDSFlags.Width))
{
throw new FileFormatException("Invalid DDS file flags: " + dwFlags.ToString() + '.');
}
dwHeight = reader.ReadLEUInt32();
dwWidth = reader.ReadLEUInt32();
dwPitchOrLinearSize = reader.ReadLEUInt32();
dwDepth = reader.ReadLEUInt32();
dwMipMapCount = reader.ReadLEUInt32();
dwReserved1 = new uint[11];
for (int i = 0; i < dwReserved1.Length; i++)
{
dwReserved1[i] = reader.ReadLEUInt32();
}
pixelFormat = new DDSPixelFormat();
pixelFormat.Deserialize(reader);
dwCaps = reader.ReadLEUInt32();
if (!Utils.ContainsBitFlags(dwCaps, (uint)DDSCaps.Texture))
{
throw new FileFormatException("Invalid DDS file caps: " + dwCaps.ToString() + '.');
}
dwCaps2 = reader.ReadLEUInt32();
dwCaps3 = reader.ReadLEUInt32();
dwCaps4 = reader.ReadLEUInt32();
dwReserved2 = reader.ReadLEUInt32();
}
private static byte[] DecodeDXT5ToARGB(byte[] compressedData, uint width, uint height, DDSPixelFormat pixelFormat, uint mipmapCount)
{
return(DecodeDXTToARGB(5, compressedData, width, height, pixelFormat, mipmapCount));
}
/// <summary>
/// Decodes DXT data to ARGB.
/// </summary>
private static byte[] DecodeDXTToARGB(int DXTVersion, byte[] compressedData, uint width, uint height, DDSPixelFormat pixelFormat, uint mipmapCount)
{
bool alphaFlag = Utils.ContainsBitFlags(pixelFormat.flags, (uint)DDSPixelFormatFlags.AlphaPixels);
bool containsAlpha = alphaFlag || ((pixelFormat.RGBBitCount == 32) && (pixelFormat.ABitMask != 0));
var reader = new UnityBinaryReader(new MemoryStream(compressedData));
var argb = new byte[TextureUtils.CalculateMipMappedTextureDataSize((int)width, (int)height, 4)];
int mipMapWidth = (int)width;
int mipMapHeight = (int)height;
int baseARGBIndex = 0;
for (int mipMapIndex = 0; mipMapIndex < mipmapCount; mipMapIndex++)
{
for (int rowIndex = 0; rowIndex < mipMapHeight; rowIndex += 4)
{
for (int columnIndex = 0; columnIndex < mipMapWidth; columnIndex += 4)
{
Color32[] colors = null;
// Doing a switch instead of using a delegate for speed.
switch (DXTVersion)
{
case 1:
colors = DecodeDXT1TexelBlock(reader, containsAlpha);
break;
case 3:
colors = DecodeDXT3TexelBlock(reader);
break;
case 5:
colors = DecodeDXT5TexelBlock(reader);
break;
default:
throw new NotImplementedException("Tried decoding a DDS file using an unsupported DXT format: DXT" + DXTVersion.ToString());
}
CopyDecodedTexelBlock(colors, argb, baseARGBIndex, rowIndex, columnIndex, mipMapWidth, mipMapHeight);
}
}
baseARGBIndex += (mipMapWidth * mipMapHeight * 4);
mipMapWidth /= 2;
mipMapHeight /= 2;
}
return(argb);
}
public void Deserialize(UnityBinaryReader reader)
{
dwSize = reader.ReadLEUInt32();
if(dwSize != 124)
{
throw new FileFormatException("Invalid DDS file header size: " + dwSize.ToString() + '.');
}
dwFlags = reader.ReadLEUInt32();
if(!Utils.ContainsBitFlags(dwFlags, (uint)DDSFlags.Height, (uint)DDSFlags.Width))
{
throw new FileFormatException("Invalid DDS file flags: " + dwFlags.ToString() + '.');
}
dwHeight = reader.ReadLEUInt32();
dwWidth = reader.ReadLEUInt32();
dwPitchOrLinearSize = reader.ReadLEUInt32();
dwDepth = reader.ReadLEUInt32();
dwMipMapCount = reader.ReadLEUInt32();
dwReserved1 = new uint[11];
for(int i = 0; i < dwReserved1.Length; i++)
{
dwReserved1[i] = reader.ReadLEUInt32();
}
pixelFormat = new DDSPixelFormat();
pixelFormat.Deserialize(reader);
dwCaps = reader.ReadLEUInt32();
if(!Utils.ContainsBitFlags(dwCaps, (uint)DDSCaps.Texture))
{
throw new FileFormatException("Invalid DDS file caps: " + dwCaps.ToString() + '.');
}
dwCaps2 = reader.ReadLEUInt32();
dwCaps3 = reader.ReadLEUInt32();
dwCaps4 = reader.ReadLEUInt32();
dwReserved2 = reader.ReadLEUInt32();
}
private static byte[] DecodeDXT5ToARGB(byte[] compressedData, uint width, uint height, DDSPixelFormat pixelFormat, uint mipmapCount)
{
return DecodeDXTToARGB(5, compressedData, width, height, pixelFormat, mipmapCount);
}
/// <summary>
/// Decodes DXT data to ARGB.
/// </summary>
private static byte[] DecodeDXTToARGB(int DXTVersion, byte[] compressedData, uint width, uint height, DDSPixelFormat pixelFormat, uint mipmapCount)
{
bool alphaFlag = Utils.ContainsBitFlags(pixelFormat.flags, (uint)DDSPixelFormatFlags.AlphaPixels);
bool containsAlpha = alphaFlag || ((pixelFormat.RGBBitCount == 32) && (pixelFormat.ABitMask != 0));
var reader = new UnityBinaryReader(new MemoryStream(compressedData));
var argb = new byte[TextureUtils.CalculateMipMappedTextureDataSize((int)width, (int)height, 4)];
int mipMapWidth = (int)width;
int mipMapHeight = (int)height;
int baseARGBIndex = 0;
for(int mipMapIndex = 0; mipMapIndex < mipmapCount; mipMapIndex++)
{
for(int rowIndex = 0; rowIndex < mipMapHeight; rowIndex += 4)
{
for(int columnIndex = 0; columnIndex < mipMapWidth; columnIndex += 4)
{
Color32[] colors = null;
// Doing a switch instead of using a delegate for speed.
switch(DXTVersion)
{
case 1:
colors = DecodeDXT1TexelBlock(reader, containsAlpha);
break;
case 3:
colors = DecodeDXT3TexelBlock(reader);
break;
case 5:
colors = DecodeDXT5TexelBlock(reader);
break;
default:
throw new NotImplementedException("Tried decoding a DDS file using an unsupported DXT format: DXT" + DXTVersion.ToString());
}
CopyDecodedTexelBlock(colors, argb, baseARGBIndex, rowIndex, columnIndex, mipMapWidth, mipMapHeight);
}
}
baseARGBIndex += (mipMapWidth * mipMapHeight * 4);
mipMapWidth /= 2;
mipMapHeight /= 2;
}
return argb;
}
