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(GR2): alternative '*Pola*' images.

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This commit is contained in:
morkt 2017-12-31 09:01:57 +04:00
parent cb54e20e56
commit 5ecb488929
1 changed files with 38 additions and 37 deletions
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75
ArcFormats/AdvSys/ImageGR2.cs
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@ -52,7 +52,7 @@ namespace GameRes.Formats.AdvSys
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
stream.Position = 0x10;
int stride = ((int)info.Width * info.BPP/8 + 3) & ~3;
int stride = GetStride (info);
var pixels = new byte[stride * info.Height];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
@ -67,6 +67,11 @@ namespace GameRes.Formats.AdvSys
return ImageData.Create (info, format, null, pixels, stride);
}
internal int GetStride (ImageMetaData info)
{
return ((int)info.Width * info.BPP/8 + 3) & ~3;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("Gr2Format.Write not implemented");
@ -75,7 +80,8 @@ namespace GameRes.Formats.AdvSys
internal class PolaMetaData : ImageMetaData
{
public int UnpackedSize;
public uint DataOffset;
public int UnpackedSize;
}
[Export(typeof(ImageFormat))]
@ -93,38 +99,40 @@ namespace GameRes.Formats.AdvSys
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
var header = stream.ReadHeader (20);
if (!header.AsciiEqual ("*Pola* "))
if (!header.AsciiEqual ("*Pola"))
return null;
bool new_version = header.AsciiEqual (5, "* ");
uint data_offset = new_version ? 20u : 13u;
int unpacked_size = header.ToInt32 (8);
using (var reader = new PolaReader (stream, 64))
stream.Position = data_offset;
var reader = new PolaReader (stream, 64);
reader.Unpack();
using (var temp = BinaryStream.FromArray (reader.Data, stream.Name))
{
reader.Unpack();
using (var temp = BinaryStream.FromArray (reader.Data, stream.Name))
var info = base.ReadMetaData (temp);
if (null == info)
return null;
if (!new_version)
unpacked_size = 0x10 + GetStride (info) * (int)info.Height;
return new PolaMetaData
{
var info = base.ReadMetaData (temp);
if (null == info)
return null;
return new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
UnpackedSize = unpacked_size,
};
}
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
DataOffset = data_offset,
UnpackedSize = unpacked_size,
};
}
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
var meta = (PolaMetaData)info;
stream.Position = 0x14;
using (var reader = new PolaReader (stream, meta.UnpackedSize))
{
reader.Unpack();
using (var temp = BinaryStream.FromArray (reader.Data, stream.Name))
return base.Read (temp, info);
}
stream.Position = meta.DataOffset;
var reader = new PolaReader (stream, meta.UnpackedSize);
reader.Unpack();
using (var temp = BinaryStream.FromArray (reader.Data, stream.Name))
return base.Read (temp, info);
}
public override void Write (Stream file, ImageData image)
@ -133,7 +141,7 @@ namespace GameRes.Formats.AdvSys
}
}
internal sealed class PolaReader : IDisposable
internal sealed class PolaReader
{
IBinaryStream m_input;
byte[] m_output;
@ -259,24 +267,17 @@ namespace GameRes.Formats.AdvSys
}
}
int m_flag = 2;
int m_bits = 2;
int NextBit ()
{
int bit = m_flag & 1;
m_flag >>= 1;
if (1 == m_flag)
int bit = m_bits & 1;
m_bits >>= 1;
if (1 == m_bits)
{
m_flag = m_input.ReadUInt16() | 0x10000;
m_bits = m_input.ReadUInt16() | 0x10000;
}
return bit;
}
#region IDisposable Members
public void Dispose ()
{
}
#endregion
}
}