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297 lines
12 KiB
C#
297 lines
12 KiB
C#
//! \file ImagePGX.cs
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//! \date Tue Dec 08 02:50:45 2015
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//! \brief Glib2 image format.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using GameRes.Utility;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Diagnostics;
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using System.Drawing;
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using System.IO;
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using System.Linq;
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using System.Windows.Media;
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namespace GameRes.Formats.Glib2
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{
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internal class PgxMetaData : ImageMetaData
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{
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public int PackedSize;
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public int Flags;
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}
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internal class StxLayerInfo
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{
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public string Path;
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public Rectangle? Rect;
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public string Effect;
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public int Blend;
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}
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[Export(typeof(ImageFormat))]
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public class PgxFormat : ImageFormat
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{
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public override string Tag { get { return "PGX"; } }
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public override string Description { get { return "Glib2 engine image format"; } }
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public override uint Signature { get { return 0x00584750; } } // 'PGX'
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static readonly InfoReader InfoCache = new InfoReader();
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x18);
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return new PgxMetaData
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{
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Width = header.ToUInt32 (8),
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Height = header.ToUInt32 (12),
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BPP = (header.ToInt16 (0x10) & 1) == 0 ? 24 : 32,
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PackedSize = header.ToInt32 (0x14),
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Flags = header.ToUInt16 (0x12),
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};
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}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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var meta = (PgxMetaData)info;
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stream.Position = 0x20;
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if (0 != (meta.Flags & 0x1000))
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{
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ReadGms (stream.AsStream);
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}
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PixelFormat format = 32 == meta.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
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int stride = (int)meta.Width * 4;
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var pixels = new byte[stride * (int)meta.Height];
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// stream.Seek (-meta.PackedSize, SeekOrigin.End);
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LzssUnpack (stream.AsStream, pixels);
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var layer = InfoCache.GetInfo (info.FileName);
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if (null != layer && null != layer.Rect)
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{
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info.OffsetX = layer.Rect.Value.X;
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info.OffsetY = layer.Rect.Value.Y;
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}
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return ImageData.Create (info, format, null, pixels);
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}
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void ReadGms (Stream input)
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{
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var header = new byte[0x10];
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if (0x10 != input.Read (header, 0, 0x10))
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throw new EndOfStreamException();
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byte swap = header[13];
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header[13] = header[9];
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header[9] = swap;
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swap = header[15];
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header[15] = header[11];
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header[11] = swap;
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swap = header[4];
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header[4] = header[8];
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header[8] = swap;
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swap = header[6];
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header[6] = header[10];
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header[10] = swap;
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int unpacked_size = LittleEndian.ToInt32 (header, 12);
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var gms_info = new byte[unpacked_size];
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LzssUnpack (input, gms_info);
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// foreach (byte in gms_info) byte ^= 0xFF
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// decrypted array contains image meta data (see InfoReader class)
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("PgxFormat.Write not implemented");
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}
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static void LzssUnpack (Stream input, byte[] output)
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{
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var frame = new byte[0x1000];
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int frame_pos = 0xFEE;
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using (var lz = new ArcView.Reader (input))
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{
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int dst = 0;
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int bits = 1;
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while (dst < output.Length)
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{
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if (1 == bits)
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bits = lz.ReadByte() | 0x100;
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if (0 != (bits & 1))
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{
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byte b = lz.ReadByte();
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output[dst++] = b;
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frame[frame_pos++] = b;
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frame_pos &= 0xFFF;
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}
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else
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{
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byte lo = lz.ReadByte();
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byte hi = lz.ReadByte();
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int offset = (hi & 0xF0) << 4 | lo;
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int count = Math.Min ((~hi & 0xF) + 3, output.Length-dst);
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for (int i = 0; i < count; ++i)
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{
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byte b = frame[offset++ & 0xFFF];
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output[dst++] = b;
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frame[frame_pos++] = b;
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frame_pos &= 0xFFF;
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}
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}
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bits >>= 1;
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}
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}
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}
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}
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internal class InfoReader
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{
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string m_last_info_dir;
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Dictionary<string, StxLayerInfo> m_layer_map;
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internal class StxEntry
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{
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public string FullName;
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public string Name;
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public int Attr;
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public uint InfoOffset;
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public uint InfoSize;
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}
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public StxLayerInfo GetInfo (string image_name)
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{
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try
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{
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var info_name = VFS.CombinePath (VFS.GetDirectoryName (image_name), "info");
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if (!VFS.FileExists (info_name))
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return null;
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if (string.IsNullOrEmpty (m_last_info_dir)
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|| string.Join (":", VFS.FullPath) != m_last_info_dir)
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ParseInfo (info_name);
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var layer_name = Path.GetFileName (image_name);
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return GetLayerInfo (layer_name);
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}
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catch (Exception X)
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{
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Trace.WriteLine (X.Message, "[Glib2] STX parse error");
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return null;
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}
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}
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StxLayerInfo GetLayerInfo (string layer_name)
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{
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if (null == m_layer_map)
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return null;
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StxLayerInfo info;
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m_layer_map.TryGetValue (layer_name, out info);
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return info;
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}
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void ParseInfo (string info_name)
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{
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if (null == m_layer_map)
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m_layer_map = new Dictionary<string, StxLayerInfo>();
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else
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m_layer_map.Clear();
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using (var info = VFS.OpenView (info_name))
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{
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if (!info.View.AsciiEqual (0, "CDBD"))
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return;
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int count = info.View.ReadInt32 (4);
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uint current_offset = 0x10;
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uint info_base = current_offset + info.View.ReadUInt32 (8);
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uint info_total_size = info.View.ReadUInt32 (12);
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info.View.Reserve (0, info_base+info_total_size);
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uint names_base = current_offset + (uint)count * 0x18;
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var dir = new List<StxEntry> (count);
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for (int i = 0; i < count; ++i)
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{
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uint name_offset = names_base + info.View.ReadUInt32 (current_offset);
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int parent_dir = info.View.ReadInt32 (current_offset+8);
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int attr = info.View.ReadInt32 (current_offset+0xC);
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uint info_offset = info.View.ReadUInt32 (current_offset+0x10);
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uint info_size = info.View.ReadUInt32 (current_offset+0x14);
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var name = info.View.ReadString (name_offset, info_base-name_offset);
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string path_name = name;
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if (parent_dir != -1)
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path_name = Path.Combine (dir[parent_dir].FullName, path_name);
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if (attr != -1 && info_size != 0)
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info_offset += info_base;
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var entry = new StxEntry {
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FullName = path_name,
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Name = name,
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Attr = attr,
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InfoOffset = info_offset,
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InfoSize = info_size,
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};
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if (name == "filename" && parent_dir != -1 && info_size != 0)
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{
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uint filename_length = info.View.ReadUInt32 (info_offset);
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var filename = info.View.ReadString (info_offset+4, filename_length);
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m_layer_map[filename] = new StxLayerInfo {
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Path = dir[parent_dir].FullName + Path.DirectorySeparatorChar,
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};
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}
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dir.Add (entry);
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current_offset += 0x18;
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}
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foreach (var layer in m_layer_map.Values)
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{
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foreach (var field in dir.Where (e => e.Attr != -1 && e.FullName.StartsWith (layer.Path)))
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{
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if ("rect" == field.Name && 0x14 == field.InfoSize)
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{
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int left = info.View.ReadInt32 (field.InfoOffset+4);
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int top = info.View.ReadInt32 (field.InfoOffset+8);
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int right = info.View.ReadInt32 (field.InfoOffset+12);
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int bottom = info.View.ReadInt32 (field.InfoOffset+16);
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layer.Rect = new Rectangle (left, top, right-left, bottom-top);
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}
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else if ("effect" == field.Name && field.InfoSize > 4)
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{
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// "norm"
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uint effect_length = info.View.ReadUInt32 (field.InfoOffset);
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layer.Effect = info.View.ReadString (field.InfoOffset+4, effect_length);
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if (layer.Effect != "norm")
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Trace.WriteLine (string.Format ("{0}: {1}effect = {2}",
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info_name, layer.Path, layer.Effect), "[Glib2.STX]");
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}
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else if ("blend" == field.Name && 4 == field.InfoSize)
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{
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// 0xFF -> opaque
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layer.Blend = info.View.ReadInt32 (field.InfoOffset);
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if (layer.Blend != 0xFF)
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Trace.WriteLine (string.Format ("{0}: {1}blend = {2}",
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info_name, layer.Path, layer.Blend), "[Glib2.STX]");
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}
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}
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}
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}
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m_last_info_dir = string.Join (":", VFS.FullPath);
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}
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}
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}
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