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(UCA): decode headerless bitmaps.

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morkt 2018-11-10 22:14:18 +04:00
parent 83c64c2187
commit 84d7113134
1 changed files with 81 additions and 2 deletions
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83
Legacy/WestGate/ArcUCA.cs
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@ -2,7 +2,7 @@
//! \date 2017 Dec 15
//! \brief West Gate resource archive.
//
// Copyright (C) 2017 by morkt
// Copyright (C) 2017-2018 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
@ -26,6 +26,7 @@
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.WestGate
{
@ -48,13 +49,21 @@ namespace GameRes.Formats.WestGate
if (file.View.ReadUInt32 (0) != 0)
return null;
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count) || count != file.View.ReadInt32 (8))
if (!IsSaneCount (count))
return null;
var dir = UcaTool.ReadIndex (file, 0x10, count, "image");
if (null == dir)
return null;
return new ArcFile (file, this, dir);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var input = arc.OpenBinaryEntry (entry);
if (0x28 == input.Signature)
return new UcaBitmapDecoder (input);
return ImageFormatDecoder.Create (input);
}
}
internal static class UcaTool
@ -87,4 +96,74 @@ namespace GameRes.Formats.WestGate
return dir;
}
}
internal sealed class UcaBitmapDecoder : BinaryImageDecoder
{
public UcaBitmapDecoder (IBinaryStream input) : base (input)
{
var header = m_input.ReadHeader (0x28);
Info = new ImageMetaData {
Width = header.ToUInt32 (4),
Height = header.ToUInt32 (8),
BPP = header.ToUInt16 (0xE),
};
}
protected override ImageData GetImageData ()
{
m_input.Position = 0x28;
int palette_size = m_input.ReadInt32();
if (24 == Info.BPP)
{
var palette = m_input.ReadBytes (palette_size * 3);
int stride = 3 * (int)Info.Width;
var pixels = new byte[stride * (int)Info.Height];
int dst = 0;
while (dst < pixels.Length)
{
int src = m_input.ReadUInt16();
if (src >= palette_size)
throw new InvalidFormatException();
int color = src * 3;
pixels[dst++] = palette[color+2];
pixels[dst++] = palette[color+1];
pixels[dst++] = palette[color];
}
return ImageData.CreateFlipped (Info, PixelFormats.Bgr24, null, pixels, stride);
}
else
{
int bits_length = m_input.ReadInt32();
var palette = m_input.ReadBytes (palette_size * 2);
int color_bits = GetColorBits (palette_size);
int stride = 2 * (int)Info.Width;
var pixels = new byte[stride * (int)Info.Height];
int dst = 0;
using (var bits = new MsbBitStream (m_input.AsStream, true))
{
while (dst < pixels.Length)
{
int src = bits.GetBits (color_bits);
if (src >= palette_size)
throw new InvalidFormatException();
int color = src * 2;
pixels[dst++] = palette[color];
pixels[dst++] = palette[color+1];
}
return ImageData.CreateFlipped (Info, PixelFormats.Bgr555, null, pixels, stride);
}
}
}
static int GetColorBits (int n)
{
--n;
n |= n >> 1;
n |= n >> 2;
n |= n >> 4;
n |= n >> 8;
n |= n >> 16;
return n + 1;
}
}
}