protected override void ReadChunkData(DjvuReader reader)
{
Width = reader.ReadInt16MSB();
Height = reader.ReadInt16MSB();
MinorVersion = reader.ReadSByte();
MajorVersion = reader.ReadSByte();
DPI = reader.ReadInt16(); // LSB
Gamma = (float)reader.ReadByte() / 10;
sbyte flag = reader.ReadSByte();
// B[3..0]
PageRotation = (PageRotations)(flag & 0x07);
}
/// <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>
/// 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();
}
}
protected override void ReadChunkData(DjvuReader reader)
{
sbyte flagByte = reader.ReadSByte();
// B[7]
IsBundled = (flagByte >> 7) == 1;
// B[6..0]
Version = flagByte & 127;
int count = reader.ReadInt16MSB();
ReadComponentData(reader, count);
}
/// <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;
}
protected override void ReadChunkData(DjvuReader reader)
{
sbyte flagByte = reader.ReadSByte();
// B[7]
IsBundled = (flagByte >> 7) == 1;
// B[6..0]
Version = flagByte & 127;
int count = reader.ReadInt16MSB();
ReadComponentData(reader, count);
}
protected override void ReadChunkData(DjvuReader reader)
{
Width = reader.ReadInt16MSB();
Height = reader.ReadInt16MSB();
MinorVersion = reader.ReadSByte();
MajorVersion = reader.ReadSByte();
DPI = reader.ReadInt16(); // LSB
Gamma = (float)reader.ReadByte() / 10;
sbyte flag = reader.ReadSByte();
// B[3..0]
PageRotation = (PageRotations)(flag & 0x07);
}
/// <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();
}
}
