struct ScapeHdrFlags {
WORD _winOrientation :1; // see ScapePicHeader.
WORD _macOrientation :1; // Either of these set means horiz.,
WORD _nullFrames :1;
WORD _multiSegmentMovie :1;
WORD _hasMarks :1; // In Ace, indicates lossless 1st image.
WORD _interleavedSound :1;
WORD _pageFlipping :1;
WORD _hasCuts :1;
WORD _isMouseMovie :1;
WORD _canMaskToReduce :1;
WORD _isMovie :1; // Animation if _isMouseMovie also set.
WORD _namedPalette :1;
WORD _isCursor :1;
WORD _usesTransparency :1;
WORD _noFixedMap :1;
WORD _noFullPalette :1;
};

// Preceeds the compressed byte streams for each strip of the image.
struct ScapeHdrFrame {
WORD _linePairCount; // # of line pairs in strip
WORD _uncompLen[ScapeHdr_NUM_STREAMS];
WORD _nextFrameSize; // 0 if this is last frame.
WORD _blockCount :15; // # of quads in a line (see note)
WORD _endOfImage :1; // last sub block in this image
};
// Note: the _blockCount and _endOfImage fields above are only valid in
// animations. Previously these fields were to be used for a checksum, but
// were usually 0. In interleaved movies from the KAV engine days, they were
// used to store info about interleaved data which followed the header, with
// the format: _soundLen:15, _lastSound:1

// Follows ScapeHdrFrame for animations (_isMovie and _isMouseMovie set).
struct ScapeHdrFrameLocator {
WORD _lineOffset; // Number of lines from mem start.
WORD _pixelOffset; // Number of pixels from line start.
};

struct ScapeHdr {
char _magicCode[4];
ScapeHdrFlags _flags;
WORD _lineCount; // Can be vertical or horizontal.
WORD _pixelsPerLine; // height if vert., width if horiz.
char _distancePenalty;
char _bitsPenalty;
BYTE _fullColorCount; // Size of primary palette.
BYTE _reducedColorCount; // Size of secondary palette.
BYTE _pdfLen[ScapeHdr_NUM_STREAMS];// 5 long, next is byte aligned.
char _ppmExponent;
WORD _xPelsPerMeter;
WORD _yPelsPerMeter;
WORD _biggestStrip; // In lines.
WORD _maxUncompressedStrip;
WORD _preFirstFrameSize;
WORD _firstFrameSize;
WORD _biggestReadBuf;
};

struct ScapeHdrMovieSubHeader {
DWORD _imageCount;
WORD _msecPerFrame;
short _soundFrameDelay;
};

struct ScapeHdrMouseMovieSubHeader {
WORD _imageCount;
WORD _initialFrame; // Which image to draw first.
WORD _swapDirections :1; // Swap horiz. motion with vert.
WORD _unusedFlags :15;
short _ratioX; // If negative, swap left and right.
short _ratioY; // If negative, swap up and down.
short _ratioZ; // If negative, swap in and out.
WORD _checkSum; // Checksum of map, actually.
};

struct ScapeHdrMouseMovieMap {
DWORD _fileOffset; // Seek position in file for frame.
WORD _firstFrameSize; // Amount to read after seek.
WORD _links[6]; // Right, left, above, below, in,
// out.
WORD _deltaFrom; // 0xffff indicates stand-alone.
};

struct ScapeHdrNamedPalette {
char _name[8];
DWORD _hash;
};