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//! \file ArcANI.cs
//! \date Thu Mar 09 10:06:53 2017
//! \brief Anime Game System animation resource.
//
// Copyright (C) 2015-2017 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 System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
namespace GameRes.Formats.Ags
{
internal class AniEntry : Entry
{
public int FrameIndex;
public int FrameType;
public int KeyFrame;
}
[Export(typeof(ArchiveFormat))]
public class AniOpener : ArchiveFormat
{
public override string Tag { get { return "ANI"; } }
public override string Description { get { return "Anime Game System animation resource"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".ani", StringComparison.InvariantCultureIgnoreCase))
return null;
uint first_offset = file.View.ReadUInt32 (0);
if (first_offset < 4 || file.MaxOffset > int.MaxValue || first_offset >= file.MaxOffset || 0 != (first_offset & 3))
return null;
int frame_count = (int)(first_offset / 4);
if (frame_count > 10000)
return null;
long index_offset = 4;
var frame_table = new uint[frame_count];
frame_table[0] = first_offset;
for (int i = 1; i < frame_count; ++i)
{
var offset = file.View.ReadUInt32 (index_offset);
index_offset += 4;
if (offset < first_offset || offset >= file.MaxOffset)
return null;
frame_table[i] = offset;
}
var frame_map = new Dictionary<uint, byte>();
foreach (var offset in frame_table)
{
if (!frame_map.ContainsKey (offset))
{
byte frame_type = file.View.ReadByte (offset);
if (frame_type >= 0x20)
return null;
frame_map[offset] = frame_type;
}
}
int last_key_frame = 0;
var dir = new List<Entry>();
for (int i = 0; i < frame_count; ++i)
{
var offset = frame_table[i];
int frame_type = frame_map[offset];
if (1 == frame_type)
continue;
frame_type &= 0xF;
if (0 == frame_type || 0xA == frame_type)
last_key_frame = dir.Count;
var entry = new AniEntry
{
Name = i.ToString ("D4"),
Type = "image",
Offset = offset,
FrameType = frame_type,
KeyFrame = last_key_frame,
FrameIndex = dir.Count,
};
dir.Add (entry);
}
if (0 == dir.Count)
return null;
var ordered = dir.OrderBy (e => e.Offset).ToList();
for (int i = 0; i < ordered.Count; ++i)
{
var entry = ordered[i] as AniEntry;
long next_offset = file.MaxOffset;
for (int j = i+1; j <= ordered.Count; ++j)
{
next_offset = j == ordered.Count ? file.MaxOffset : ordered[j].Offset;
if (next_offset != entry.Offset)
break;
}
entry.Size = (uint)(next_offset - entry.Offset);
}
return new ArcFile (file, this, dir);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var ani = (AniEntry)entry;
byte[] key_frame = null;
if (ani.KeyFrame != ani.FrameIndex)
{
var dir = (List<Entry>)arc.Dir;
for (int i = ani.KeyFrame; i < ani.FrameIndex; ++i)
{
var frame = dir[i];
using (var s = arc.File.CreateStream (frame.Offset, frame.Size))
{
var frame_info = Cg.ReadMetaData (s) as CgMetaData;
if (null == frame_info)
break;
using (var reader = new CgFormat.Reader (s, frame_info, key_frame))
{
reader.Unpack();
key_frame = reader.Data;
}
}
}
}
var input = arc.File.CreateStream (entry.Offset, entry.Size);
try
{
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var info = Cg.ReadMetaData (input) as CgMetaData;
if (null == info)
throw new InvalidFormatException();
return new CgFormat.Reader (input, info, key_frame);
}
catch
{
input.Dispose();
throw;
}
}
static Lazy<ImageFormat> s_Cg = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("CG"));
ImageFormat Cg { get { return s_Cg.Value; } }
}
}