170 lines
6.4 KiB
C#

//! \file ArcERI.cs
//! \date Wed Jan 27 18:24:06 2016
//! \brief Entis multi-frame image format.
//
// Copyright (C) 2016 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;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.Entis
{
[Export(typeof(ArchiveFormat))]
public class EriOpener : ArchiveFormat
{
public override string Tag { get { return "ERI/MULTI"; } }
public override string Description { get { return "Entis multi-frame image format"; } }
public override uint Signature { get { return 0x69746e45u; } } // 'Enti'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public EriOpener ()
{
Extensions = new string[] { "eri" };
}
static readonly Lazy<ImageFormat> s_EriFormat = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("ERI"));
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (0x10, "Entis Rasterized Image")
&& !file.View.AsciiEqual (0x10, "Moving Entis Image"))
return null;
EriMetaData info;
using (var eris = file.CreateStream())
info = s_EriFormat.Value.ReadMetaData (eris) as EriMetaData;
if (null == info || null == info.Header || !IsSaneCount (info.Header.FrameCount))
return null;
info.FileName = file.Name;
string base_name = Path.GetFileNameWithoutExtension (file.Name);
int count = info.Header.FrameCount;
long current_offset = info.StreamPos;
var dir = new List<Entry> (count);
var id = new AsciiString (8);
Color[] palette = null;
int i = 0;
while (i < count && current_offset < file.MaxOffset)
{
if (file.View.Read (current_offset, id.Value, 0, 8) < 8)
break;
if ("Stream " == id)
{
current_offset += 0x10;
continue;
}
long section_size = file.View.ReadInt64 (current_offset+8);
if (section_size < 0 || section_size > int.MaxValue)
throw new FileSizeException();
current_offset += 0x10;
if (0 == section_size)
continue;
if ("Palette " == id)
{
using (var stream = file.CreateStream (current_offset, (uint)section_size))
palette = EriFormat.ReadPalette (stream, (int)section_size);
}
else if ("ImageFrm" == id || "DiffeFrm" == id)
{
var entry = new EriEntry {
Name = string.Format ("{0}#{1:D4}.tga", base_name, i++),
Type = "image",
Offset = current_offset,
Size = (uint)section_size,
FrameIndex = dir.Count,
IsDiff = "DiffeFrm" == id,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
current_offset += section_size;
}
if (0 == dir.Count)
return null;
return new EriMultiImage (file, this, dir, info, palette);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var earc = (EriMultiImage)arc;
var eent = (EriEntry)entry;
var pixels = earc.GetFrame (eent.FrameIndex);
if (32 == earc.Info.BPP && 0 == (earc.Info.FormatType & (int)EriImage.WithAlpha))
{
for (int p = 3; p < pixels.Length; p += 4)
pixels[p] = 0xFF;
}
return TgaStream.Create (earc.Info, pixels);
}
}
internal class EriMultiImage : ArcFile
{
public readonly EriMetaData Info;
public readonly Color[] Palette;
byte[][] Frames;
public EriMultiImage (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, EriMetaData info, Color[] palette)
: base (arc, impl, dir)
{
Info = info;
Palette = palette;
Frames = new byte[dir.Count][];
}
public byte[] GetFrame (int index)
{
if (index >= Frames.Length)
throw new ArgumentException ("index");
if (null != Frames[index])
return Frames[index];
var entry = Dir.ElementAt (index) as EriEntry;
byte[] prev_frame = null;
if (index > 0 && entry.IsDiff)
{
prev_frame = GetFrame (index-1);
}
using (var stream = File.CreateStream (entry.Offset, entry.Size))
{
var reader = new EriReader (stream, Info, Palette, prev_frame);
reader.DecodeImage();
Frames[index] = reader.Data;
}
return Frames[index];
}
}
internal class EriEntry : Entry
{
public int FrameIndex;
public bool IsDiff;
}
}