public static BM.Frame ReadHeader1(ByteStream stream, BM.CreateArgs createArgs, out FMEHeader header)
{
header = new FMEHeader();
header.Shift = new Vector2();
header.Shift.x = (float)stream.ReadLittleInt32();
header.Shift.y = (float)stream.ReadLittleInt32();
header.Flipped = stream.ReadLittleInt32() != 0;
int header2Ofs = stream.ReadLittleInt32();
stream.Skip(16 + (header2Ofs-32));
return ReadHeader2(stream, createArgs);
}
private Header ReadHeader(ByteStream stream, EHeaderType headerType)
{
Header header = new Header();
if (headerType == EHeaderType.FileHeader) {
header.W = stream.ReadLittleShort16();
header.H = stream.ReadLittleShort16();
stream.Skip(2);
header.IY = stream.ReadLittleShort16();
header.Transparent = stream.ReadByte();
stream.Skip(1);
header.Compressed = stream.ReadLittleShort16();
header.DataSize = stream.ReadLittleInt32();
stream.Skip(12);
} else {
header.W = stream.ReadLittleShort16();
header.H = stream.ReadLittleShort16();
stream.Skip(20);
header.Transparent = stream.ReadByte();
stream.Skip(3);
}
return header;
}
public static BM.Frame ReadHeader2(ByteStream stream, BM.CreateArgs createArgs)
{
int headerStart = (int)stream.Position;
BM.Header header = new BM.Header();
header.W = stream.ReadLittleInt32();
header.H = stream.ReadLittleInt32();
header.Compressed = stream.ReadLittleInt32();
header.DataSize = stream.ReadLittleInt32();
header.Transparent = 0x8;
stream.Skip(8);
int[] columnOffsets = null;
if (header.Compressed != 0) {
header.Compressed = 2;
columnOffsets = new int[header.W];
for (int i = 0; i < columnOffsets.Length; ++i) {
columnOffsets[i] = stream.ReadLittleInt32() + headerStart;
}
}
return BM.ReadColumns(stream, header, columnOffsets, createArgs);
}
private void ParseBitmap(ByteStream stream, CreateArgs createArgs)
{
if ((stream.ReadString(3) != "BM ") || (stream.ReadByte() != 0x1e)){
throw new InvalidDataException("Not a BM file.");
}
Header header = ReadHeader(stream, EHeaderType.FileHeader);
DebugCheck.Assert(stream.Position == 32);
if ((header.W == 1) && (header.H != 1)) {
// multiple bitmaps in this file.
_fps = stream.ReadByte();
stream.Skip(1);
long baseOfs = stream.Position;
int[] offsets = new int[header.IY];
for (int i = 0; i < offsets.Length; ++i) {
offsets[i] = stream.ReadLittleInt32();
}
for (int i = 0; i < offsets.Length; ++i) {
stream.SeekSet(offsets[i] + baseOfs);
Header subHeader = ReadHeader(stream, EHeaderType.SubHeader);
Frame frame = ReadColumns(stream, subHeader, null, createArgs);
_frames.Add(frame);
}
} else {
int[] columnOffsets = null;
if (header.Compressed != 0) {
// read column offsets.
stream.SeekSet(header.DataSize);
columnOffsets = new int[header.W];
for (int i = 0; i < columnOffsets.Length; ++i) {
columnOffsets[i] = stream.ReadLittleInt32() + 32;
}
}
Frame frame = ReadColumns(stream, header, columnOffsets, createArgs);
_frames.Add(frame);
}
}