/// <summary>
/// Read a RecordRle record.
/// </summary>
/// <param name="record">Record index.</param>
/// <param name="frame">Frame index.</param>
/// <returns>True if succeeded, otherwise false.</returns>
private bool ReadRle(int record, int frame)
{
// Create buffer to hold extracted image
records[record].Frames[frame].Width = records[record].Width;
records[record].Frames[frame].Height = records[record].Height;
records[record].Frames[frame].Stride = records[record].Width;
records[record].Frames[frame].Format = DFBitmap.Formats.Indexed;
records[record].Frames[frame].Data = new byte[records[record].Width * records[record].Height];
// Find offset to special row headers for this frame
long position = records[record].Position + records[record].DataOffset;
position += (records[record].Height * frame) * 4;
BinaryReader Reader = managedFile.GetReader(position);
// Read special row headers for this frame
SpecialRowHeader[] SpecialRowHeaders = new SpecialRowHeader[records[record].Height];
for (int i = 0; i < records[record].Height; i++)
{
SpecialRowHeaders[i].RowOffset = Reader.ReadInt16();
SpecialRowHeaders[i].RowEncoding = (RowEncoding)Reader.ReadUInt16();
}
// Create row memory writer
BinaryWriter writer = new BinaryWriter(new MemoryStream(records[record].Frames[frame].Data));
// Extract all rows of image
foreach (SpecialRowHeader header in SpecialRowHeaders)
{
// Get offset to row relative to record data offset
position = records[record].Position + header.RowOffset;
Reader.BaseStream.Position = position;
// Handle row data based on compression
if (RowEncoding.IsRleEncoded == header.RowEncoding)
{
// Extract RLE row
byte pixel = 0;
int probe = 0;
int rowPos = 0;
int rowWidth = Reader.ReadUInt16();
do
{
probe = Reader.ReadInt16();
if (probe < 0)
{
probe = -probe;
pixel = Reader.ReadByte();
for (int i = 0; i < probe; i++)
{
writer.Write(pixel);
rowPos++;
}
}
else if (0 < probe)
{
writer.Write(Reader.ReadBytes(probe));
rowPos += probe;
}
} while (rowPos < rowWidth);
}
else
{
// Just copy bytes
writer.Write(Reader.ReadBytes(records[record].Width));
}
}
return(true);
}
/// <summary>
/// Read a RecordRle record.
/// </summary>
/// <param name="record">Record index.</param>
/// <param name="frame">Frame index.</param>
/// <returns>True if succeeded, otherwise false.</returns>
private bool ReadRle(int record, int frame)
{
// Create buffer to hold extracted image
byte[] data = new byte[records[record].Width * records[record].Height];
records[record].Frames[frame].Width = records[record].Width;
records[record].Frames[frame].Height = records[record].Height;
// Find offset to special row headers for this frame
long position = records[record].Position + records[record].DataOffset;
position += (records[record].Height * frame) * 4;
BinaryReader reader = managedFile.GetReader(position);
// Read special row headers for this frame
SpecialRowHeader[] SpecialRowHeaders = new SpecialRowHeader[records[record].Height];
for (int i = 0; i < records[record].Height; i++)
{
SpecialRowHeaders[i].RowOffset = reader.ReadInt16();
SpecialRowHeaders[i].RowEncoding = (RowEncoding)reader.ReadUInt16();
}
// Extract all rows of image
int dstPos = 0;
foreach(SpecialRowHeader header in SpecialRowHeaders)
{
// Get offset to row relative to record data offset
position = records[record].Position + header.RowOffset;
reader.BaseStream.Position = position;
// Handle row data based on compression
if (RowEncoding.IsRleEncoded == header.RowEncoding)
{
// Extract RLE row
byte pixel = 0;
int probe = 0;
int rowPos = 0;
int rowWidth = reader.ReadUInt16();
do
{
probe = reader.ReadInt16();
if (probe < 0)
{
probe = -probe;
pixel = reader.ReadByte();
for (int i = 0; i < probe; i++)
{
data[dstPos++] = pixel;
rowPos++;
}
}
else if (0 < probe)
{
byte[] nextBytes = reader.ReadBytes(probe);
Array.Copy(nextBytes, 0, data, dstPos, nextBytes.Length);
dstPos += nextBytes.Length;
rowPos += probe;
}
} while (rowPos < rowWidth);
}
else
{
// Just copy bytes
byte[] nextBytes = reader.ReadBytes(records[record].Width);
Array.Copy(nextBytes, 0, data, dstPos, nextBytes.Length);
dstPos += nextBytes.Length;
}
}
// Assign complete data to image
records[record].Frames[frame].Data = data;
return true;
}
/// <summary>
/// Read a RecordRle record.
/// </summary>
/// <param name="record">Record index.</param>
/// <param name="frame">Frame index.</param>
/// <returns>True if succeeded, otherwise false.</returns>
private bool ReadRle(int record, int frame)
{
// Create buffer to hold extracted image
byte[] data = new byte[records[record].Width * records[record].Height];
records[record].Frames[frame] = new DFBitmap();
records[record].Frames[frame].Width = records[record].Width;
records[record].Frames[frame].Height = records[record].Height;
records[record].Frames[frame].Palette = Palette;
// Find offset to special row headers for this frame
long position = records[record].Position + records[record].DataOffset;
position += (records[record].Height * frame) * 4;
BinaryReader reader = managedFile.GetReader(position);
// Read special row headers for this frame
SpecialRowHeader[] SpecialRowHeaders = new SpecialRowHeader[records[record].Height];
for (int i = 0; i < records[record].Height; i++)
{
SpecialRowHeaders[i].RowOffset = reader.ReadInt16();
SpecialRowHeaders[i].RowEncoding = (RowEncoding)reader.ReadUInt16();
}
// Extract all rows of image
int dstPos = 0;
foreach (SpecialRowHeader SRHeader in SpecialRowHeaders)
{
// Get offset to row relative to record data offset
position = records[record].Position + SRHeader.RowOffset;
reader.BaseStream.Position = position;
// Handle row data based on compression
if (RowEncoding.IsRleEncoded == SRHeader.RowEncoding)
{
// Extract RLE row
byte pixel = 0;
int probe = 0;
int rowPos = 0;
int rowWidth = reader.ReadUInt16();
do
{
probe = reader.ReadInt16();
if (probe < 0)
{
probe = -probe;
pixel = reader.ReadByte();
for (int i = 0; i < probe; i++)
{
data[dstPos++] = pixel;
rowPos++;
}
}
else if (0 < probe)
{
byte[] nextBytes = reader.ReadBytes(probe);
Array.Copy(nextBytes, 0, data, dstPos, nextBytes.Length);
dstPos += nextBytes.Length;
rowPos += probe;
}
} while (rowPos < rowWidth);
}
else
{
// Just copy bytes
byte[] nextBytes = reader.ReadBytes(records[record].Width);
Array.Copy(nextBytes, 0, data, dstPos, nextBytes.Length);
dstPos += nextBytes.Length;
}
}
// Assign complete data to image
records[record].Frames[frame].Data = data;
return(true);
}
/// <summary>
/// Read a RecordRle record.
/// </summary>
/// <param name="record">Record index.</param>
/// <param name="frame">Frame index.</param>
/// <returns>True if succeeded, otherwise false.</returns>
private bool ReadRle(int record, int frame)
{
// Create buffer to hold extracted image
records[record].Frames[frame].Width = records[record].Width;
records[record].Frames[frame].Height = records[record].Height;
records[record].Frames[frame].Stride = records[record].Width;
records[record].Frames[frame].Format = DFBitmap.Formats.Indexed;
records[record].Frames[frame].Data = new byte[records[record].Width * records[record].Height];
// Find offset to special row headers for this frame
long position = records[record].Position + records[record].DataOffset;
position += (records[record].Height * frame) * 4;
BinaryReader Reader = managedFile.GetReader(position);
// Read special row headers for this frame
SpecialRowHeader[] SpecialRowHeaders = new SpecialRowHeader[records[record].Height];
for (int i = 0; i < records[record].Height; i++)
{
SpecialRowHeaders[i].RowOffset = Reader.ReadInt16();
SpecialRowHeaders[i].RowEncoding = (RowEncoding)Reader.ReadUInt16();
}
// Create row memory writer
BinaryWriter writer = new BinaryWriter(new MemoryStream(records[record].Frames[frame].Data));
// Extract all rows of image
foreach(SpecialRowHeader header in SpecialRowHeaders)
{
// Get offset to row relative to record data offset
position = records[record].Position + header.RowOffset;
Reader.BaseStream.Position = position;
// Handle row data based on compression
if (RowEncoding.IsRleEncoded == header.RowEncoding)
{
// Extract RLE row
byte pixel = 0;
int probe = 0;
int rowPos = 0;
int rowWidth = Reader.ReadUInt16();
do
{
probe = Reader.ReadInt16();
if (probe < 0)
{
probe = -probe;
pixel = Reader.ReadByte();
for (int i = 0; i < probe; i++)
{
writer.Write(pixel);
rowPos++;
}
}
else if (0 < probe)
{
writer.Write(Reader.ReadBytes(probe));
rowPos += probe;
}
} while (rowPos < rowWidth);
}
else
{
// Just copy bytes
writer.Write(Reader.ReadBytes(records[record].Width));
}
}
return true;
}
