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(UnpackTpw): made into separate static method.

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This commit is contained in:
morkt 2023-09-07 11:51:19 +04:00
parent 42085dd468
commit ae24ef1cdc
1 changed files with 71 additions and 62 deletions
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43
ArcFormats/Ankh/ArcGRP.cs
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@ -235,8 +235,15 @@ namespace GameRes.Formats.Ankh
Stream OpenTpw (ArcFile arc, PackedEntry entry)
{
var output = new byte[entry.UnpackedSize];
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
{
var output = new byte[entry.UnpackedSize];
UnpackTpw (input, output);
return new BinMemoryStream (output, entry.Name);
}
}
internal static void UnpackTpw (IBinaryStream input, byte[] output)
{
input.Position = 8;
var offsets = new int[4];
@ -250,10 +257,11 @@ namespace GameRes.Formats.Ankh
byte ctl = input.ReadUInt8();
if (0 == ctl)
break;
int remaining = output.Length - dst;
int count;
if (ctl < 0x40)
{
count = Math.Min (ctl, output.Length - dst);
count = Math.Min (ctl, remaining);
input.Read (output, dst, count);
dst += count;
}
@ -262,7 +270,8 @@ namespace GameRes.Formats.Ankh
if (0x6F == ctl)
count = input.ReadUInt16();
else
count = ctl - 0x3D;
count = (byte)(ctl - 0x3D);
count = Math.Min (count, remaining);
byte v = input.ReadUInt8();
while (count --> 0)
output[dst++] = v;
@ -272,13 +281,14 @@ namespace GameRes.Formats.Ankh
if (ctl == 0x9F)
count = input.ReadUInt16();
else
count = ctl - 0x6E;
byte v1 = input.ReadUInt8();
byte v2 = input.ReadUInt8();
while (count --> 0)
count = (byte)(ctl - 0x6E);
dst += input.Read (output, dst, Math.Min (2, remaining));
--count;
if (count > 0 && remaining > 2)
{
output[dst++] = v1;
output[dst++] = v2;
count = Math.Min (count * 2, remaining - 2);
Binary.CopyOverlapped (output, dst-2, dst, count);
dst += count;
}
}
else if (ctl <= 0xBF)
@ -286,26 +296,25 @@ namespace GameRes.Formats.Ankh
if (ctl == 0xBF)
count = input.ReadUInt16();
else
count = ctl - 0x9E;
input.Read (output, dst, 3);
if (count > 0)
count = (byte)(ctl - 0x9E);
dst += input.Read (output, dst, Math.Min (3, remaining));
--count;
if (count > 0 && remaining > 3)
{
count *= 3;
Binary.CopyOverlapped (output, dst, dst+3, count-3);
count = Math.Min (count * 3, remaining - 3);
Binary.CopyOverlapped (output, dst-3, dst, count);
dst += count;
}
}
else
{
count = (ctl & 0x3F) + 3;
count = Math.Min ((ctl & 0x3F) + 3, remaining);
int offset = input.ReadUInt8();
offset = (offset & 0x3F) - offsets[offset >> 6];
Binary.CopyOverlapped (output, dst+offset, dst, count);
dst += count;
}
}
return new BinMemoryStream (output, entry.Name);
}
}
}