/*
*
* Programming Guide for DDS
* https://msdn.microsoft.com/en-us/library/windows/desktop/bb943991(v=vs.85).aspx#File_Layout1
*
* File Structure
*
* DWORD dwMagic;
* DDS_HEADER header;
*
* If the DDS_PIXELFORMAT dwFlags is set to DDPF_FOURCC and dwFourCC is set to "DX10" an additional DDS_HEADER_DXT10
*
* DDS_HEADER_DXT10 header10;
*
* A pointer to an array of bytes that contains the main surface data.
*
* BYTE bdata[]
*
* BYTE bdata2[]
*
*/
public static DDS read(Stream stream)
{
var dds = new DDS();
int readIndex = 0;
// Read headers
DDS_Magic fileMagicData;
readIndex += stream.ReadStruct(out fileMagicData);
readIndex += stream.ReadStruct(out dds.ddsHeader);
// Only read the ddsHeaderDXT10 when the FOURCC.DX10 is set
if (dds.ddsHeader.ddspf.dwFourCC == DDS_PIXELFORMAT.FOURCC.DX10)
{
readIndex += stream.ReadStruct(out dds.ddsHeaderDXT10);
}
if (dds.ddsHeader.ddspf.dwFourCC != DDS_PIXELFORMAT.FOURCC.DXT1 ||
(dds.ddsHeader.dwFlags & DDS_HEADER.Flags.DDSD_LINEARSIZE) == 0)
{
throw new NotImplementedException("Format not implemented");
}
// Initialize and read DXT1 blocks
var size = dds.height * dds.width;
dds.blocks = new DXT1Block[size];
for (uint i = 0; i < size; i++)
{
DDS_DXT1Block block;
readIndex += stream.ReadStruct(out block);
dds.blocks[i] = block;
}
return dds;
}
public static void Run(string[] args)
{
if (args.Length < 2)
{
var appName = System.AppDomain.CurrentDomain.FriendlyName;
Console.WriteLine("Invalid command. Syntax: " + appName + " <orig file> <dest file>");
}
else
{
// Intermediate format
Image image = null;
string file1 = args[0];
string file2 = args[1];
// Check source and destionation formats
FORMAT fromFormat;
FORMAT toFormat;
if (file1.ToLower().Contains(".dds"))
{
fromFormat = FORMAT.DDS;
}
else if (file1.ToLower().Contains(".bmp"))
{
fromFormat = FORMAT.BMP;
}
else
{
Console.WriteLine("Unknown file extension: " + file1);
return;
}
if (file2.ToLower().Contains(".dds"))
{
toFormat = FORMAT.DDS;
}
else if (file2.ToLower().Contains(".bmp"))
{
toFormat = FORMAT.BMP;
}
else
{
Console.WriteLine("Unknown file extension: " + file2);
return;
}
try
{
// Read into Intermediate format
using (var fileStream = new FileStream(file1, FileMode.Open))
{
if (fromFormat == FORMAT.DDS)
{
image = DDS.DDS.read(fileStream);
}
else if (fromFormat == FORMAT.BMP)
{
image = BMP.BMP.read(fileStream);
}
fileStream.Close();
}
// Save into final format
File.Delete(file2);
using (var fileStream = new FileStream(file2, FileMode.OpenOrCreate))
{
if (toFormat == FORMAT.DDS)
{
DDS.DDS dds = image;
dds.write(fileStream);
}
else if (toFormat == FORMAT.BMP)
{
BMP.BMP bmp = image;
bmp.write(fileStream);
}
fileStream.Close();
}
}
catch (FileNotFoundException e)
{
Console.WriteLine("File not found! " + file1);
}
}
}