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implemented MNG images.
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morkt
parent
a04b6aae9b
commit
02853c4438
@ -128,8 +128,10 @@
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<Compile Include="Ikura\ImageGGS.cs" />
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<Compile Include="Ikura\ImageTAN.cs" />
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<Compile Include="Ikura\ImageVRS.cs" />
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<Compile Include="ImageMNG.cs" />
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<Compile Include="Lambda\ArcLAX.cs" />
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<Compile Include="Lambda\ImageCLS.cs" />
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<Compile Include="Lilim\ImageIMG.cs" />
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<Compile Include="Maika\ArcBK.cs" />
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<Compile Include="Nekopunch\ImagePBM.cs" />
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<Compile Include="Nexas\ArcTPF.cs" />
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217
ArcFormats/ImageMNG.cs
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217
ArcFormats/ImageMNG.cs
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//! \file ImageMNG.cs
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//! \date 2018 Jan 16
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//! \brief Multiple-image Network Graphics format.
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//
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// Copyright (C) 2018 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 System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats
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{
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internal class MngMetaData : ImageMetaData
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{
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public long PngOffset;
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}
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/// <summary>
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/// MNG may contain multiple frames, only the first one is loaded here.
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/// </summary>
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[Export(typeof(ImageFormat))]
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public class MngFormat : ImageFormat
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{
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public override string Tag { get { return "MNG"; } }
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public override string Description { get { return "Multiple-image Network Graphics"; } }
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public override uint Signature { get { return 0x474E4D8A; } }
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (8);
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if (!header.AsciiEqual (4, "\x0D\x0A\x1A\x0A"))
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return null;
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uint chunk_size = Binary.BigEndian (file.ReadUInt32());
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var chunk_type = file.ReadBytes (4);
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if (!chunk_type.AsciiEqual ("MHDR"))
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return null;
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long chunk_pos = file.Position + chunk_size + 4;
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var info = new MngMetaData { BPP = 32 };
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info.Width = Binary.BigEndian (file.ReadUInt32());
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info.Height = Binary.BigEndian (file.ReadUInt32());
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for (;;)
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{
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file.Position = chunk_pos;
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chunk_size = Binary.BigEndian (file.ReadUInt32());
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file.Read (chunk_type, 0, 4);
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if (Binary.AsciiEqual (chunk_type, "MEND") || Binary.AsciiEqual (chunk_type, "IEND"))
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break;
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if (Binary.AsciiEqual (chunk_type, "IHDR"))
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{
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info.PngOffset = chunk_pos;
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break;
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}
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chunk_pos += chunk_size + 12;
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}
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if (0 == info.PngOffset)
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return null;
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return info;
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}
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internal static readonly byte[] PngHeader = { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var meta = (MngMetaData)info;
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var body = new StreamRegion (file.AsStream, meta.PngOffset, true);
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using (var png = new PrefixStream (PngHeader, body))
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{
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var decoder = new PngBitmapDecoder (png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
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var frame = decoder.Frames[0];
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frame.Freeze();
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return new ImageData (frame, info);
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}
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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 ("MngFormat.Write not implemented");
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class MngOpener : ArchiveFormat
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{
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public override string Tag { get { return "MNG"; } }
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public override string Description { get { return "Multiple-image Network Graphics"; } }
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public override uint Signature { get { return 0x474E4D8A; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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using (var input = file.CreateStream())
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{
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var info = MngFormat.ReadMetaData (input) as MngMetaData;
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if (null == info)
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return null;
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var base_name = Path.GetFileNameWithoutExtension (file.Name);
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long chunk_pos = info.PngOffset;
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var chunk_type = new byte[4];
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long ihdr_pos = 0;
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var dir = new List<Entry>();
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while (chunk_pos < file.MaxOffset)
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{
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input.Position = chunk_pos;
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uint chunk_size = Binary.BigEndian (input.ReadUInt32());
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input.Read (chunk_type, 0, 4);
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if (Binary.AsciiEqual (chunk_type, "MEND"))
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break;
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if (Binary.AsciiEqual (chunk_type, "IHDR"))
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{
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ihdr_pos = chunk_pos;
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}
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else if (Binary.AsciiEqual (chunk_type, "IEND"))
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{
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if (0 == ihdr_pos) // IEND chunk without corresponding IHDR
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return null;
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var entry = new Entry {
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Name = string.Format ("{0}#{1:D2}.png", base_name, dir.Count),
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Type = "image",
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Offset = ihdr_pos,
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Size = (uint)(chunk_pos + chunk_size + 12 - ihdr_pos),
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};
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dir.Add (entry);
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ihdr_pos = 0;
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}
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chunk_pos += chunk_size + 12;
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}
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if (0 == dir.Count)
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return null;
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return new ArcFile (file, this, dir);
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}
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}
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public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
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{
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return new MngFrameDecoder (input);
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}
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ImageFormat MngFormat { get { return s_MngFormat.Value; } }
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static readonly ResourceInstance<ImageFormat> s_MngFormat = new ResourceInstance<ImageFormat> ("MNG");
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}
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internal sealed class MngFrameDecoder : IImageDecoder
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{
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IBinaryStream m_input;
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ImageData m_image;
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public Stream Source { get { m_input.Position = 0; return m_input.AsStream; } }
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public ImageFormat SourceFormat { get { return ImageFormat.Png; } }
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public ImageMetaData Info { get; private set; }
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public ImageData Image {
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get {
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if (null == m_image)
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{
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var decoder = new PngBitmapDecoder (Source, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
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var frame = decoder.Frames[0];
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frame.Freeze();
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m_image = new ImageData (frame, Info);
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}
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return m_image;
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}
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}
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public MngFrameDecoder (IBinaryStream input)
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{
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var png = new PrefixStream (MngFormat.PngHeader, input.AsStream);
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m_input = new BinaryStream (png, input.Name);
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try
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{
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Info = ImageFormat.Png.ReadMetaData (m_input);
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if (null == Info)
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throw new InvalidFormatException();
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}
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catch
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{
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m_input.Dispose();
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}
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}
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#region IDisposable members
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_input.Dispose();
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m_disposed = true;
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}
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}
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#endregion
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}
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}
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