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use common LzssReader class for decompression.

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This commit is contained in:
morkt 2015-04-04 05:29:23 +04:00
parent ead52fc075
commit 487a134800
1 changed files with 2 additions and 84 deletions
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86
ArcFormats/ImageBMD.cs
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@ -72,7 +72,8 @@ namespace GameRes.Formats.BlackRainbow
throw new ArgumentException ("BmdFormat.Read should be supplied with BmdMetaData", "info");
stream.Position = 0x14;
using (var reader = new Reader (stream, meta))
int image_size = (int)(meta.Width*meta.Height*4);
using (var reader = new LzssReader (stream, (int)meta.PackedSize, image_size))
{
PixelFormat format = meta.Flag != 0 ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
reader.Unpack();
@ -99,89 +100,6 @@ namespace GameRes.Formats.BlackRainbow
}
}
internal class Reader : IDisposable
{
BinaryReader m_input;
byte[] m_output;
uint m_size;
public byte[] Data { get { return m_output; } }
public Reader (Stream file, BmdMetaData info)
{
m_input = new BinaryReader (file, Encoding.ASCII, true);
m_output = new byte[info.Width*info.Height*4];
m_size = info.PackedSize;
}
public void Unpack ()
{
int dst = 0;
int remaining = (int)m_size;
byte[] frame = new byte[0x1000];
int frame_pos = 0x1000-18;
while (remaining > 0)
{
int ctl = m_input.ReadByte();
--remaining;
for (int bit = 1; remaining > 0 && bit != 0x100; bit <<= 1)
{
if (dst >= m_output.Length)
return;
if (0 != (ctl & bit))
{
byte b = m_input.ReadByte();
--remaining;
frame[frame_pos++] = b;
frame_pos &= 0xfff;
m_output[dst++] = b;
}
else
{
if (remaining < 2)
return;
int lo = m_input.ReadByte();
int hi = m_input.ReadByte();
remaining -= 2;
int offset = (hi & 0xf0) << 4 | lo;
for (int count = 3 + (hi & 0xF); count != 0; --count)
{
if (dst >= m_output.Length)
break;
byte v = frame[offset++];
offset &= 0xfff;
frame[frame_pos++] = v;
frame_pos &= 0xfff;
m_output[dst++] = v;
}
}
}
}
}
#region IDisposable Members
bool disposed = false;
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
protected virtual void Dispose (bool disposing)
{
if (!disposed)
{
if (disposing)
{
m_input.Dispose();
}
disposed = true;
}
}
#endregion
}
internal class Writer : IDisposable
{
const int MinChunkSize = 3;