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(RctFormat): added support for "incremental" images.

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doesn't work inside archives, requires filesystem abstraction layer.
This commit is contained in:
morkt 2015-08-14 06:14:35 +04:00
parent 4888a65349
commit d542fe3c59
1 changed files with 82 additions and 31 deletions
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113
ArcFormats/ImageRCT.cs
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@ -29,7 +29,6 @@ using System.Text;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Diagnostics;
using System.Linq;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
@ -56,11 +55,13 @@ namespace GameRes.Formats.Majiro
[Export(typeof(ImageFormat))]
public class RctFormat : ImageFormat
{
public override string Tag { get { return "RCT"; } }
public override string Tag { get { return "RCT"; } }
public override string Description { get { return "Majiro game engine RGB image format"; } }
public override uint Signature { get { return 0x9a925a98; } }
public override uint Signature { get { return 0x9a925a98; } }
public static Dictionary<string, string> KnownKeys = new Dictionary<string, string> {
public bool OverlayFrames = true;
public static readonly Dictionary<string, string> KnownKeys = new Dictionary<string, string> {
{ "Akatsuki no Goei", "おぬぐり食べる？" },
{ "Nagisa no", "青い空に向かって、溜息を一つこぼす。" },
{ "White ~blanche comme la lune~", "たった３枚の紙" },
@ -119,40 +120,22 @@ namespace GameRes.Formats.Majiro
var meta = info as RctMetaData;
if (null == meta)
throw new ArgumentException ("RctFormat.Read should be supplied with RctMetaData", "info");
if (meta.AddSize > 0)
{
Trace.WriteLine (string.Format ("{0} bytes of additional data", meta.AddSize), "RctFormat.Read");
file.Position = meta.DataOffset;
byte[] data = new byte[meta.AddSize];
if (data.Length != file.Read (data, 0, data.Length))
throw new EndOfStreamException();
}
byte[] base_image = null;
if (meta.AddSize > 0 && OverlayFrames)
base_image = ReadBaseImage (file, meta);
file.Position = meta.DataOffset + meta.AddSize;
if (meta.IsEncrypted)
{
if (null == Key)
{
var password = QueryPassword();
if (string.IsNullOrEmpty (password))
throw new UnknownEncryptionScheme();
Key = InitDecryptionKey (password);
}
byte[] data = new byte[meta.DataSize];
if (data.Length != file.Read (data, 0, data.Length))
throw new EndOfStreamException();
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= Key[i & 0x3FF];
}
file = new MemoryStream (data);
}
file = OpenEncryptedStream (file, meta.DataSize);
try
{
using (var reader = new Reader (file, meta))
{
reader.Unpack();
return ImageData.Create (meta, PixelFormats.Bgr24, null, reader.Data, (int)meta.Width*3);
var pixels = reader.Data;
if (base_image != null)
pixels = CombineImage (base_image, pixels);
return ImageData.Create (meta, PixelFormats.Bgr24, null, pixels, (int)meta.Width*3);
}
}
catch
@ -163,6 +146,74 @@ namespace GameRes.Formats.Majiro
}
}
byte[] CombineImage (byte[] base_image, byte[] overlay)
{
for (int i = 2; i < base_image.Length; i += 3)
{
if (0 == overlay[i-2] && 0 == overlay[i-1] && 0xff == overlay[i])
{
overlay[i-2] = base_image[i-2];
overlay[i-1] = base_image[i-1];
overlay[i] = base_image[i];
}
}
return overlay;
}
byte[] ReadBaseImage (Stream file, RctMetaData meta)
{
file.Position = meta.DataOffset;
byte[] name_bin = new byte[meta.AddSize];
if (name_bin.Length != file.Read (name_bin, 0, name_bin.Length))
throw new EndOfStreamException();
try
{
string name = Encodings.cp932.GetString (name_bin, 0, name_bin.Length-1);
if (File.Exists (name))
{
using (var base_file = File.OpenRead (name))
{
var base_info = ReadMetaData (base_file) as RctMetaData;
if (null != base_info && 0 == base_info.AddSize
&& meta.Width == base_info.Width && meta.Height == base_info.Height)
{
base_file.Position = base_info.DataOffset;
Stream input = base_file;
if (base_info.IsEncrypted)
input = OpenEncryptedStream (base_file, base_info.DataSize);
using (var reader = new Reader (input, base_info))
{
reader.Unpack();
return reader.Data;
}
}
}
}
}
catch { /* ignore baseline image read errors */ }
return null;
}
Stream OpenEncryptedStream (Stream file, uint data_size)
{
if (null == Key)
{
var password = QueryPassword();
if (string.IsNullOrEmpty (password))
throw new UnknownEncryptionScheme();
Key = InitDecryptionKey (password);
}
byte[] data = new byte[data_size];
if (data.Length != file.Read (data, 0, data.Length))
throw new EndOfStreamException();
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= Key[i & 0x3FF];
}
return new MemoryStream (data);
}
private byte[] InitDecryptionKey (string password)
{
byte[] bin_pass = Encodings.cp932.GetBytes (password);