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(GR2): implemented LL5 compression.

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This commit is contained in:
morkt 2018-04-01 07:55:04 +04:00
parent 6835dfbefd
commit dd26bc010c
1 changed files with 39 additions and 2 deletions
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41
ArcFormats/AdvSys/ArcGR2.cs
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@ -23,7 +23,6 @@
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
@ -41,7 +40,7 @@ namespace GameRes.Formats.UMeSoft
public Gr2Opener ()
{
Extensions = new string[] { "gr2", "vic" };
Extensions = new string[] { "gr2", "vic", "pac" };
}
public override ArcFile TryOpen (ArcView file)
@ -52,6 +51,7 @@ namespace GameRes.Formats.UMeSoft
uint data_offset = file.View.ReadUInt32 (8);
if (data_offset < 0x10 || data_offset >= file.MaxOffset)
return null;
bool is_gr2 = file.Name.HasExtension ("gr2");
uint index_offset = 0x10;
var dir = new List<Entry> (count);
@ -63,10 +63,47 @@ namespace GameRes.Formats.UMeSoft
entry.Offset = file.View.ReadUInt32 (index_offset+0x14);
if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
return null;
if (is_gr2)
entry.Type = "image";
dir.Add (entry);
index_offset += 0x18;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!arc.File.View.AsciiEqual (entry.Offset, "LL5\0"))
return base.OpenEntry (arc, entry);
using (var input = arc.File.CreateStream (entry.Offset+4, entry.Size-4))
{
var output = new MemoryStream();
LL5Decompress (input, output);
output.Position = 0;
return output;
}
}
void LL5Decompress (IBinaryStream input, Stream output)
{
var buffer = new byte[0x100];
while (input.PeekByte() != -1)
{
int count = input.ReadInt8();
if (count < 0)
{
count = -count;
input.Read (buffer, 0, count);
output.Write (buffer, 0, count);
}
else
{
byte v = input.ReadUInt8();
for (int i = 0; i < count; ++i)
buffer[i] = v;
output.Write (buffer, 0, count);
}
}
}
}
}