static void Main(string[] args)
{
var ImageConverter = new ImageConverter();
var compressionFormat = new BC1CompressionFormat();
Console.WriteLine("Welcome to Image Converter. Currently supporting DDS -> BMP and BMP -> DDS");
Console.WriteLine("Image Converter support 24bit bmp files and DXT1 DDS files");
Console.WriteLine("Type file name.");
var fileName = Console.ReadLine();
if (fileName.ToLower().EndsWith(".dds"))
{
ImageConverter.ConvertDDSToBMP(fileName, compressionFormat);
}
else if (fileName.ToLower().EndsWith(".bmp"))
{
ImageConverter.ConvertBMPToDDS(fileName, compressionFormat);
}
else
{
Console.WriteLine("File format not supported.");
}
Console.ReadKey();
}
/// <summary>
/// reads a dds file and outputs a bmp file
/// </summary>
/// <param name="fileName"></param>
/// <param name="compressionFormat"></param>
public void ConvertDDSToBMP(string fileName, BC1CompressionFormat compressionFormat)
{
var ddsFile = ReadDDSFile(fileName);
if (!Helpers.FileDimensionsValid((int)ddsFile.DDSHeader.Width, (int)ddsFile.DDSHeader.Height))
{
throw new ArgumentException("DDS Image dimensions not valid");
}
fileName = fileName.Remove(fileName.Length - 4) + ".bmp";
WriteBMPFile(fileName, ddsFile, compressionFormat);
Console.WriteLine("Conversion complete, file created " + fileName);
}
/// <summary>
/// reads a bmp file and outputs a DDS file
/// </summary>
/// <param name="fileName"></param>
/// <param name="compressionFormat"></param>
public void ConvertBMPToDDS(string fileName, BC1CompressionFormat compressionFormat)
{
var bmpFile = ReadBMPFile(fileName);
if (!Helpers.FileDimensionsValid((int)bmpFile.BMPFileInfoHeader.Width, (int)bmpFile.BMPFileInfoHeader.Height))
{
throw new ArgumentException("BMP Image dimensions not valid");
}
fileName = fileName.Remove(fileName.Length - 4) + ".dds";
WriteDDSFile(fileName, bmpFile, compressionFormat);
Console.WriteLine("Conversion complete, file created " + fileName);
}
public void WriteDDSFile(string fileName, BMPFile bmpFile, BC1CompressionFormat compressionFormat)
{
using (BinaryWriter writer = new BinaryWriter(File.Open(fileName, FileMode.Create)))
{
var ddsFile = new DDSFile();
writer.Write(Constants.DDSMagicNumber);
//create default header
ddsFile.DDSHeader = CreateHeader((int)bmpFile.BMPFileInfoHeader.Width, (int)bmpFile.BMPFileInfoHeader.Height, Helpers.BC1Unorm());
var headerSize = Marshal.SizeOf(typeof(DDSHeader));
var headerBuffer = new byte[headerSize];
// Populate header data directly from the bytebuffer
GCHandle handle = GCHandle.Alloc(headerBuffer, GCHandleType.Pinned);
Marshal.StructureToPtr(ddsFile.DDSHeader, handle.AddrOfPinnedObject(), true);
handle.Free();
writer.Write(headerBuffer);
ddsFile.Data = new byte[ddsFile.DDSHeader.PitchOrLinearSize];
int numberOfPixels = (int)ddsFile.DDSHeader.Width * (int)ddsFile.DDSHeader.Height;
int numberOfRequiredBlocks = numberOfPixels / Constants.TexelCount;
int bufferSize = numberOfRequiredBlocks * Constants.BC1ByteSize;
ddsFile.Data = new byte[bufferSize];
int numberOfVerticalBlocks = (int)bmpFile.BMPFileInfoHeader.Height / Constants.BlockDimension;
int numberOfHorizontalBlocks = (int)bmpFile.BMPFileInfoHeader.Width / Constants.BlockDimension;
int numberOfBlocks = numberOfVerticalBlocks * numberOfHorizontalBlocks;
for (int i = 0; i < numberOfBlocks; ++i)
{
var blockIndex = Helpers.ToColumnMajor(i, numberOfHorizontalBlocks);
var blockColors = bmpFile.GetBlockColors(blockIndex);
var blockData = compressionFormat.Compress(blockColors);
ddsFile.SetBlockData(blockIndex, blockData);
}
writer.Write(ddsFile.Data);
}
}
private void WriteBMPFile(string fileName, DDSFile ddsFile, BC1CompressionFormat compressionFormat)
{
using (BinaryWriter writer = new BinaryWriter(File.Open(fileName, FileMode.Create)))
{
byte[] BMPMagicNumber = { 0x42, 0x4D };
int BMPFileHeaderSize = 14;
int BMPFileInfoHeaderSize = 40;
int imageRawSize = (int)ddsFile.DDSHeader.Width * (int)ddsFile.DDSHeader.Height * 3;
int fileSize = imageRawSize + BMPFileHeaderSize + BMPFileInfoHeaderSize;
var bmpFile = new BMPFile();
bmpFile.BMPFileHeader = new BMPFileHeader();
bmpFile.BMPFileHeader.MagicHeader = BMPMagicNumber;
bmpFile.BMPFileHeader.Reserved1 = 0;
bmpFile.BMPFileHeader.Reserved2 = 0;
bmpFile.BMPFileHeader.FileSize = (uint)fileSize;
bmpFile.BMPFileHeader.OffToPixelArray = (uint)BMPFileHeaderSize + (uint)BMPFileInfoHeaderSize;
bmpFile.BMPFileInfoHeader = new BMPFileInfoHeader();
bmpFile.BMPFileInfoHeader.HeaderSize = (uint)BMPFileInfoHeaderSize;
bmpFile.BMPFileInfoHeader.Width = ddsFile.DDSHeader.Width;
bmpFile.BMPFileInfoHeader.Height = ddsFile.DDSHeader.Height;
bmpFile.BMPFileInfoHeader.ColorPlanes = 1;
bmpFile.BMPFileInfoHeader.BitCount = 24;
bmpFile.BMPFileInfoHeader.CompressionType = 0;
bmpFile.BMPFileInfoHeader.RawDataSize = (uint)imageRawSize;
bmpFile.BMPFileInfoHeader.HorizontalPixelPerMeter = 2835;
bmpFile.BMPFileInfoHeader.VerticalPixelPerMeter = 2835;
bmpFile.BMPFileInfoHeader.ColorsUsed = 0;
bmpFile.BMPFileInfoHeader.ImportantColors = 0;
writer.Write(bmpFile.BMPFileHeader.MagicHeader);
writer.Write(bmpFile.BMPFileHeader.FileSize);
writer.Write(bmpFile.BMPFileHeader.Reserved1);
writer.Write(bmpFile.BMPFileHeader.Reserved2);
writer.Write(bmpFile.BMPFileHeader.OffToPixelArray);
writer.Write(bmpFile.BMPFileInfoHeader.HeaderSize);
writer.Write(bmpFile.BMPFileInfoHeader.Width);
writer.Write(bmpFile.BMPFileInfoHeader.Height);
writer.Write(bmpFile.BMPFileInfoHeader.ColorPlanes);
writer.Write(bmpFile.BMPFileInfoHeader.BitCount);
writer.Write(bmpFile.BMPFileInfoHeader.CompressionType);
writer.Write(bmpFile.BMPFileInfoHeader.RawDataSize);
writer.Write(bmpFile.BMPFileInfoHeader.HorizontalPixelPerMeter);
writer.Write(bmpFile.BMPFileInfoHeader.VerticalPixelPerMeter);
writer.Write(bmpFile.BMPFileInfoHeader.ColorsUsed);
writer.Write(bmpFile.BMPFileInfoHeader.ImportantColors);
bmpFile.PixelData = new byte[imageRawSize];
int numberOfVerticalBlocks = (int)ddsFile.DDSHeader.Height / Constants.BlockDimension;
int numberOfHorizontalBlocks = (int)ddsFile.DDSHeader.Width / Constants.BlockDimension;
int numberOfBlocks = numberOfVerticalBlocks * numberOfHorizontalBlocks;
for (int i = 0; i < numberOfBlocks; ++i)
{
var blockIndex = Helpers.ToColumnMajor(i, numberOfHorizontalBlocks);
var blockData = ddsFile.GetBlockData(blockIndex);
var blockColors = compressionFormat.Decompress(blockData);
bmpFile.SetBlockColors(blockIndex, blockColors);
}
writer.Write(bmpFile.PixelData.FlipArrayHorizontal((int)bmpFile.BMPFileInfoHeader.Height));
}
}
