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