/// <summary>
/// Decodes the data for the zone
/// </summary>
/// <param name="reader"></param>
private void DecodeZoneData(DjvuReader reader, TextZone sibling, TextChunk chunkParent)
{
_zoneType = (ZoneTypes)reader.ReadByte();
_x = reader.ReadUInt16MSB() - 0x8000;
_y = reader.ReadUInt16MSB() - 0x8000;
_width = reader.ReadUInt16MSB() - 0x8000;
_height = reader.ReadUInt16MSB() - 0x8000;
_textOffset = reader.ReadUInt16MSB() - 0x8000;
_textLength = reader.ReadInt24MSB();
ResolveOffsets(_parent, sibling);
_rectangle = new Rectangle(_x, _y, _width, _height);
int childrenZones = reader.ReadInt24MSB();
List <TextZone> children = new List <TextZone>();
TextZone childrenSibling = null;
for (int x = 0; x < childrenZones; x++)
{
TextZone newZone = new TextZone(reader, this, childrenSibling, chunkParent);
childrenSibling = newZone;
children.Add(newZone);
}
_children = children.ToArray();
}
/// <summary>
/// Reads the compressed data from the djvu file
/// </summary>
/// <param name="reader"></param>
/// <param name="count"></param>
/// <param name="compressedSectionLength"></param>
private void ReadCompressedData(DjvuReader reader, int count, int compressedSectionLength)
{
DjvuReader decompressor = reader.GetBZZEncodedReader(compressedSectionLength);
// Read the component sizes
for (int x = 0; x < count; x++)
{
_components[x].Size = decompressor.ReadInt24MSB();
}
// Read the component flag information
for (int x = 0; x < count; x++)
{
_components[x].DecodeFlags(decompressor.ReadSByte());
}
// Read the component strings
for (int x = 0; x < count; x++)
{
_components[x].ID = decompressor.ReadNullTerminatedString();
if (_components[x].HasName == true)
{
_components[x].Name = decompressor.ReadNullTerminatedString();
}
if (_components[x].HasTitle == true)
{
_components[x].Title = decompressor.ReadNullTerminatedString();
}
}
_isInitialized = true;
}
/// <summary>
/// Loads the bookmark data
/// </summary>
/// <param name="reader"></param>
private void DecodeBookmarkData(DjvuReader reader)
{
int childrenCount = reader.ReadByte();
int textSize = reader.ReadInt24MSB();
Name = reader.ReadUTF8String(textSize);
int urlSize = reader.ReadInt24MSB();
URL = reader.ReadUTF8String(urlSize);
// Read in all the children bookmarks
List <Bookmark> children = new List <Bookmark>();
for (int x = 0; x < childrenCount; x++)
{
children.Add(new Bookmark(reader, Document, this));
}
_children = children.ToArray();
}
/// <summary>
/// Reads the compressed text data
/// </summary>
private void ReadCompressedTextData()
{
if (Length == 0)
{
return;
}
using (DjvuReader reader = GetTextDataReader(_dataLocation))
{
_textLength = reader.ReadInt24MSB();
byte[] textBytes = reader.ReadBytes(_textLength);
_text = Encoding.UTF7.GetString(textBytes);
_version = reader.ReadSByte();
_zone = new TextZone(reader, null, null, this);
}
_isDecoded = true;
}
/// <summary>
/// Decodes the palette data
/// </summary>
/// <param name="reader"></param>
private void ReadPaletteData(DjvuReader reader)
{
sbyte header = reader.ReadSByte();
bool isShapeTable = (header >> 7) == 1;
_version = header & 127;
int paletteSize = reader.ReadInt16MSB();
// Read in the palette colors
List <Pixel> paletteColors = new List <Pixel>();
for (int x = 0; x < paletteSize; x++)
{
sbyte b = reader.ReadSByte();
sbyte g = reader.ReadSByte();
sbyte r = reader.ReadSByte();
paletteColors.Add(new Pixel(b, g, r));
}
_paletteColors = paletteColors.ToArray();
if (isShapeTable == true)
{
int totalBlits = reader.ReadInt24MSB();
DjvuReader compressed = reader.GetBZZEncodedReader();
// Read in the blit colors
List <int> blitColors = new List <int>();
for (int x = 0; x < totalBlits; x++)
{
int index = compressed.ReadInt16MSB();
blitColors.Add(index);
}
_blitColors = blitColors.ToArray();
}
}
/// <summary>
/// Decodes the palette data
/// </summary>
/// <param name="reader"></param>
private void ReadPaletteData(DjvuReader reader)
{
sbyte header = reader.ReadSByte();
bool isShapeTable = (header >> 7) == 1;
_version = header & 127;
int paletteSize = reader.ReadInt16MSB();
// Read in the palette colors
List<Pixel> paletteColors = new List<Pixel>();
for (int x = 0; x < paletteSize; x++)
{
sbyte b = reader.ReadSByte();
sbyte g = reader.ReadSByte();
sbyte r = reader.ReadSByte();
paletteColors.Add(new Pixel(b, g, r));
}
_paletteColors = paletteColors.ToArray();
if (isShapeTable == true)
{
int totalBlits = reader.ReadInt24MSB();
DjvuReader compressed = reader.GetBZZEncodedReader();
// Read in the blit colors
List<int> blitColors = new List<int>();
for (int x = 0; x < totalBlits; x++)
{
int index = compressed.ReadInt16MSB();
blitColors.Add(index);
}
_blitColors = blitColors.ToArray();
}
}
/// <summary>
/// Decodes the data for the zone
/// </summary>
/// <param name="reader"></param>
private void DecodeZoneData(DjvuReader reader, TextZone sibling, TextChunk chunkParent)
{
_zoneType = (ZoneTypes)reader.ReadByte();
_x = reader.ReadUInt16MSB() - 0x8000;
_y = reader.ReadUInt16MSB() - 0x8000;
_width = reader.ReadUInt16MSB() - 0x8000;
_height = reader.ReadUInt16MSB() - 0x8000;
_textOffset = reader.ReadUInt16MSB() - 0x8000;
_textLength = reader.ReadInt24MSB();
ResolveOffsets(_parent, sibling);
_rectangle = new Rectangle(_x, _y, _width, _height);
int childrenZones = reader.ReadInt24MSB();
List<TextZone> children = new List<TextZone>();
TextZone childrenSibling = null;
for (int x = 0; x < childrenZones; x++)
{
TextZone newZone = new TextZone(reader, this, childrenSibling, chunkParent);
childrenSibling = newZone;
children.Add(newZone);
}
_children = children.ToArray();
}
/// <summary>
/// Loads the bookmark data
/// </summary>
/// <param name="reader"></param>
private void DecodeBookmarkData(DjvuReader reader)
{
int childrenCount = reader.ReadByte();
int textSize = reader.ReadInt24MSB();
Name = reader.ReadUTF8String(textSize);
int urlSize = reader.ReadInt24MSB();
URL = reader.ReadUTF8String(urlSize);
// Read in all the children bookmarks
List<Bookmark> children = new List<Bookmark>();
for (int x = 0; x < childrenCount; x++)
{
children.Add(new Bookmark(reader, Document, this));
}
_children = children.ToArray();
}
