AmaroK86.ImageFormat.DDSImage.DDSImage C# (CSharp) Method

        public DDSImage(string ddsFileName)
        {
            using (FileStream ddsStream = File.OpenRead(ddsFileName))
            {
                using (BinaryReader r = new BinaryReader(ddsStream))
                {
                    dwMagic = r.ReadInt32();
                    if (dwMagic != 0x20534444)
                    {
                        throw new Exception("This is not a DDS!");
                    }

                    Read_DDS_HEADER(header, r);

                    if (((header.ddspf.dwFlags & DDPF_FOURCC) != 0) && (header.ddspf.dwFourCC == FOURCC_DX10 /*DX10*/))
                    {
                        throw new Exception("DX10 not supported yet!");
                    }

                    int mipMapCount = 1;
                    if ((header.dwFlags & DDSD_MIPMAPCOUNT) != 0)
                        mipMapCount = header.dwMipMapCount;

                    mipMaps = new MipMap[mipMapCount];

                    ddsFormat = getFormat();

                    double bytePerPixel = getBytesPerPixel(ddsFormat);

                    for (int i = 0; i < mipMapCount; i++)
                    {
                        int w = (int)(header.dwWidth / Math.Pow(2, i));
                        int h = (int)(header.dwHeight / Math.Pow(2, i));

                        if (ddsFormat == DDSFormat.DXT1 || ddsFormat == DDSFormat.DXT5)
                        {
                            w = (w < 4) ? 4 : w;
                            h = (h < 4) ? 4 : h;
                        }

                        int mipMapBytes = (int)(w * h * bytePerPixel);
                        mipMaps[i] = new MipMap(r.ReadBytes(mipMapBytes), ddsFormat, w, h);
                    }
                }
            }
        }