void ReadTrailer(MbmBinaryReader input)
{
// Seek to trailer
UInt32 lastPos = input.Tell();
input.Seek(header.trailerOff);
UInt32 count = input.ReadUInt32();
if (count > MaxBitmapCount || count == 0)
{
String message = String.Format("Bitmap count in MBM file doesn't make sense ({0}). " +
"It should not be equal to 0 and must not be larger than {1}", count, MaxBitmapCount);
throw new MbmException(message);
}
trailer = new MbmTrailer(count);
for (UInt32 i = 0; i < count; i++)
{
trailer.Add(input.ReadUInt32());
}
input.Seek(lastPos);
}
void Load(System.IO.Stream input)
{
MbmBinaryReader bin = new MbmBinaryReader(input);
ReadHeader(bin);
ReadTrailer(bin);
bitmapHeaders = new List <SBMHeader>(trailer.Count);
for (int i = 0; i < trailer.Count; i++)
{
bitmapHeaders.Add(ReadSingleBitmapHeader(bin, trailer[i]));
}
}
void ReadHeader(MbmBinaryReader input)
{
UInt32 uid1 = input.ReadUInt32();
UInt32 uid2 = input.ReadUInt32();
UInt32 uid3 = input.ReadUInt32();
if (uid1 != MbmHeader.directFileStoreUIDNum || uid2 != MbmHeader.multiBitmapUIDNum)
{
throw new MbmException("UID1 and UID2 of MBM header has invalid value!");
}
// No need for the uid1 and uid2 anymore
UInt32 uidChecksum = input.ReadUInt32();
UInt32 trailerOffset = input.ReadUInt32();
header = new MbmHeader(new UID(uid3), trailerOffset);
}
SBMHeader ReadSingleBitmapHeader(MbmBinaryReader input, UInt32 offset)
{
SBMHeader bitmapHeader = new SBMHeader();
// Seek to trailer
UInt32 lastPos = input.Tell();
input.Seek(offset);
bitmapHeader.bitmapSize = input.ReadUInt32();
bitmapHeader.headerLength = input.ReadUInt32();
bitmapHeader.sizeInPixel = input.ReadSize();
bitmapHeader.sizeInTwips = input.ReadSize();
bitmapHeader.bitsPerPixel = input.ReadUInt32();
bitmapHeader.colorMode = (BitmapColor)input.ReadUInt32();
bitmapHeader.paletteSize = input.ReadUInt32();
bitmapHeader.compression = (BitmapCompression)input.ReadUInt32();
input.Seek(lastPos);
return(bitmapHeader);
}
