public static bool DDSCompress(Bitmap bitmap, DDSFourCC fourCC, out byte[] newData)
{
Bitmap temp = null;
if (bitmap.PixelFormat == PixelFormats.Bgra32)
{
temp = bitmap;
}
else
{
temp = bitmap.ConvertTo(PixelFormats.Bgra32, null);
}
bool returned = DDSCompress(temp.Width, temp.Height, temp.InternalGetData(), fourCC, out byte[] returneddata);
newData = returneddata;
return(returned);
}
public static bool DDSCompress(int width, int height, byte[] data, DDSFourCC fourCC, out byte[] newData)
{
newData = null;
if (fourCC == DDSFourCC.NONE)
{
return(false);
}
int Width = (int)Math.Ceiling((float)width / 4);
int Heigth = (int)Math.Ceiling((float)height / 4);
int step = fourCC == DDSFourCC.DXT1 ? 8 : 16;
byte[,,] pixels = new byte[height, width, 4];
Buffer.BlockCopy(data, 0, pixels, 0, height * width * 4);
byte[] compressedData = new byte[Width * Heigth * step];
for (int y = 0, index = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4, index += step)
{
if (fourCC == DDSFourCC.DXT1)
{
EncodeBC1(pixels, x, y, compressedData, index, false);
}
else if (fourCC == DDSFourCC.DXT3)
{
EncodeBC2(pixels, x, y, compressedData, index);
}
else if (fourCC == DDSFourCC.DXT5)
{
EncodeBC3(pixels, x, y, compressedData, index);
}
}
}
newData = compressedData;
return(true);
}
/// <summary>
/// If returned true then newData is Bgra32.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="data"></param>
/// <param name="fourCC"></param>
/// <param name="newData"></param>
/// <returns></returns>
public static bool DDSDecompress(int width, int height, byte[] data, DDSFourCC fourCC, out byte[] newData)
{
newData = null;
if (fourCC == DDSFourCC.NONE)
{
return(false);
}
int Width = (int)Math.Ceiling((float)width / 4);
int Heigth = (int)Math.Ceiling((float)height / 4);
int step = fourCC == DDSFourCC.DXT1 ? 8 : 16;
byte[,,] pixel = new byte[height, width, 4];
byte[] uncompressed_data = new byte[width * height * 4];
for (int i = 0, index = 0; i < Heigth; i++)
{
for (int k = 0; k < Width; k++, index += step)
{
if (fourCC == DDSFourCC.DXT1)
{
DDS_DXT1_GetPixels(pixel, k * 4, i * 4, data, index);
}
else if (fourCC == DDSFourCC.DXT3)
{
DDS_DXT3_GetPixels(pixel, k * 4, i * 4, data, index);
}
else if (fourCC == DDSFourCC.DXT5)
{
DDS_DXT5_GetPixels(pixel, k * 4, i * 4, data, index);
}
}
}
Buffer.BlockCopy(pixel, 0, uncompressed_data, 0, uncompressed_data.Length);
newData = uncompressed_data;
return(true);
}