internal override bool Parse(WZBinaryReader r, bool initial, out byte[] result)
{
r.Skip(1);
int blockLen = r.ReadWZInt(); // sound data length
Duration = r.ReadWZInt(); // sound duration
r.Skip(1 + 16 + 16 + 2); // Byte, Major type GUID, Sub type GUID, byte, byte
Guid fmt = new Guid(r.ReadBytes(16));
if (fmt == WaveFormatExGuid)
{
if (initial)
{
r.Skip(r.ReadWZInt());
}
else
{
_header = r.ReadBytes(r.ReadWZInt());
if (_header.Length != 18 + GetCbSize(_header))
{
_header = null; // TODO FIXME figure out what those gibberish headers are
}
// But in any case they don't affect our uses
// File._aes.DecryptBytesAsciiKey(_header);
//if (_header.Length != 18 + GetCbSize(_header))
// Debug.WriteLine("Failed to parse WAVEFORMATEX header at node {0}", Path);
//throw new WZException($"Failed to parse WAVEFORMATEX header at node {Path}");
}
}
else if (fmt != NoHeaderGuid)
{
Debug.WriteLine("New format guid {0} @ {1}", fmt, Path);
}
if (!initial || (File._flag & WZReadSelection.EagerParseAudio) == WZReadSelection.EagerParseAudio)
{
result = r.ReadBytes(blockLen);
return(true);
}
else
{
r.Skip(blockLen);
result = null;
return(false);
}
}
internal override bool Parse(WZBinaryReader br, bool initial, out Bitmap result)
{
bool skip = (File._flag & WZReadSelection.NeverParseCanvas) == WZReadSelection.NeverParseCanvas,
eager = (File._flag & WZReadSelection.EagerParseCanvas) == WZReadSelection.EagerParseCanvas;
if (initial)
{
if (skip && eager)
{
result = null;
return(WZUtil.Die <bool>("Both NeverParseCanvas and EagerParseCanvas are set."));
}
br.Skip(1);
if (br.ReadByte() == 1)
{
br.Skip(2);
List <WZObject> l = WZExtendedParser.ParsePropertyList(br, this, Image, Image._encrypted);
if (ChildCount == 0)
{
l.ForEach(Add);
}
}
_afterChildren = br.Position;
}
else
{
br.Position = _afterChildren;
}
int width = br.ReadWZInt(); // width
int height = br.ReadWZInt(); // height
int format1 = br.ReadWZInt(); // format 1
int scale = br.ReadByte(); // format 2
br.Skip(4);
int blockLen = br.ReadInt32();
if ((initial || skip) && !eager)
{
br.Skip(blockLen); // block Len & png data
result = null;
return(skip);
}
else
{
br.Skip(1);
byte[] header = br.ReadBytes(2);
// FLG bit 5 indicates the presence of a preset dictionary
// seems like MS doesn't use that?
if ((header[1] & 0x20) != 0)
{
Debug.WriteLine("Warning; zlib with preset dictionary");
result = null;
br.Skip(blockLen - 3);
return(true);
}
// zlib header: CMF (byte), FLG (byte)
byte[] pngData = br.ReadBytes(blockLen - 3);
result = ParsePNG(width, height, format1, scale,
// CMF least significant bits 0 to 3 are compression method. only 8 is valid
(header[0] & 0xF) != 8 ||
// CMF << 8 | FLG i.e. header read as a big-endian short is a multiple of 31
(header[0] << 8 | header[1]) % 31 != 0
? DecryptPNG(pngData)
: pngData);
return(true);
}
}
