private void Parse(WZBinaryReader wzbr, long offset) { wzbr.Seek(offset); int entryCount = wzbr.ReadWZInt(); for (int i = 0; i < entryCount; ++i) { byte type = wzbr.ReadByte(); string name = null; switch (type) { case 2: int x = wzbr.ReadInt32(); wzbr.PeekFor(() => { wzbr.Seek(x + File._fstart); type = wzbr.ReadByte(); name = wzbr.ReadWZString(File._encrypted); }); break; case 3: case 4: name = wzbr.ReadWZString(File._encrypted); break; case 1: // wzbr.Skip(10); // continue; default: WZUtil.Die($"Unknown object type {type} in WzDirectory."); break; } if (name == null) { WZUtil.Die("Failed to read WZDirectory entry name."); } int size = wzbr.ReadWZInt(); wzbr.ReadWZInt(); uint woffset = wzbr.ReadWZOffset(File._fstart); switch (type) { case 3: Add(new WZDirectory(name, this, File, wzbr.Clone(), woffset)); break; case 4: Add(new WZImage(name, this, File, File.GetSubstream(woffset, size))); break; } } }
private void Parse(WZBinaryReader wzbr, long offset) { wzbr.Seek(offset); int entryCount = wzbr.ReadWZInt(); for (int i = 0; i < entryCount; ++i) { byte type = wzbr.ReadByte(); string name = null; switch (type) { case 2: int x = wzbr.ReadInt32(); wzbr.PeekFor(() => { wzbr.Seek(x + File._fstart); type = wzbr.ReadByte(); name = wzbr.ReadWZString(File._encrypted); }); break; case 3: case 4: name = wzbr.ReadWZString(File._encrypted); break; case 1: // wzbr.Skip(10); // continue; default: WZUtil.Die($"Unknown object type {type} in WzDirectory."); break; } if (name == null) { WZUtil.Die("Failed to read WZDirectory entry name."); } int size = wzbr.ReadWZInt(); wzbr.ReadWZInt(); uint woffset = wzbr.ReadWZOffset(File._fstart); switch (type) { case 3: Add(new WZDirectory(name, this, File, wzbr.Clone(), woffset)); break; case 4: Add(new WZImage(name, this, File, File.GetSubstream(woffset, size))); break; } } }
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); } }