mirror of
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373 lines
14 KiB
C#
373 lines
14 KiB
C#
//! \file ImageERI.cs
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//! \date Tue May 26 12:04:30 2015
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//! \brief Entis rasterized 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 System;
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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.Text;
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using System.Text.RegularExpressions;
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using System.Windows.Media;
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using GameRes.Utility;
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namespace GameRes.Formats.Entis
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{
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internal class EriMetaData : ImageMetaData
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{
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public int StreamPos;
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public int Version;
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public CvType Transformation;
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public EriCode Architecture;
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public int FormatType;
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public bool VerticalFlip;
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public int ClippedPixel;
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public int SamplingFlags;
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public ulong QuantumizedBits;
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public ulong AllottedBits;
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public int BlockingDegree;
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public int LappedBlock;
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public int FrameTransform;
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public int FrameDegree;
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public EriFileHeader Header;
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public string Description;
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}
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public enum CvType
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{
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Lossless_ERI = 0x03020000,
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DCT_ERI = 0x00000001,
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LOT_ERI = 0x00000005,
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LOT_ERI_MSS = 0x00000105,
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}
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internal class EriFileHeader
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{
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public int Version;
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public int ContainedFlag;
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public int KeyFrameCount;
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public int FrameCount;
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public int AllFrameTime;
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}
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public enum EriCode
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{
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RunlengthGamma = -1,
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RunlengthHuffman = -4,
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Nemesis = -16,
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}
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public enum EriImage
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{
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RGB = 0x00000001,
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RGBA = 0x04000001,
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Gray = 0x00000002,
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TypeMask = 0x00FFFFFF,
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WithPalette = 0x01000000,
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UseClipping = 0x02000000,
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WithAlpha = 0x04000000,
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SideBySide = 0x10000000,
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}
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internal class EriFile : BinaryReader
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{
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internal struct Section
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{
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public AsciiString Id;
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public long Length;
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}
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public EriFile (Stream stream) : base (stream, Encoding.Unicode, true)
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{
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}
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public Section ReadSection ()
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{
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var section = new Section();
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section.Id = new AsciiString (8);
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if (8 != this.Read (section.Id.Value, 0, 8))
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throw new EndOfStreamException();
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section.Length = this.ReadInt64();
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return section;
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}
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public long FindSection (string name)
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{
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var id = new AsciiString (8);
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for (;;)
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{
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if (8 != this.Read (id.Value, 0, 8))
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throw new EndOfStreamException();
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var length = this.ReadInt64();
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if (length < 0)
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throw new EndOfStreamException();
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if (id == name)
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return length;
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this.BaseStream.Seek (length, SeekOrigin.Current);
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}
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}
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}
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[Export(typeof(ImageFormat))]
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public class EriFormat : ImageFormat
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{
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public override string Tag { get { return "ERI"; } }
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public override string Description { get { return "Entis rasterized image format"; } }
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public override uint Signature { get { return 0x69746e45u; } } // 'Enti'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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byte[] header = new byte[0x40];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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if (0x03000100 != LittleEndian.ToUInt32 (header, 8))
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return null;
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if (!Binary.AsciiEqual (header, 0x10, "Entis Rasterized Image"))
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return null;
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using (var reader = new EriFile (stream))
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{
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var section = reader.ReadSection();
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if (section.Id != "Header " || section.Length <= 0)
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return null;
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int header_size = (int)section.Length;
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int stream_pos = 0x50 + header_size;
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EriFileHeader file_header = null;
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EriMetaData info = null;
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string desc = null;
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while (header_size > 8)
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{
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section = reader.ReadSection();
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header_size -= 8;
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if (section.Length <= 0 || section.Length > header_size)
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break;
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if ("FileHdr " == section.Id)
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{
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file_header = new EriFileHeader();
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file_header.Version = reader.ReadInt32();
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if (file_header.Version > 0x00020100)
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throw new InvalidFormatException ("Invalid ERI file version");
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file_header.ContainedFlag = reader.ReadInt32();
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file_header.KeyFrameCount = reader.ReadInt32();
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file_header.FrameCount = reader.ReadInt32();
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file_header.AllFrameTime = reader.ReadInt32();
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}
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else if ("ImageInf" == section.Id)
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{
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int version = reader.ReadInt32();
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if (version != 0x00020100 && version != 0x00020200)
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return null;
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info = new EriMetaData { StreamPos = stream_pos, Version = version };
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info.Transformation = (CvType)reader.ReadInt32();
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info.Architecture = (EriCode)reader.ReadInt32();
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info.FormatType = reader.ReadInt32();
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int w = reader.ReadInt32();
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int h = reader.ReadInt32();
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info.Width = (uint)Math.Abs (w);
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info.Height = (uint)Math.Abs (h);
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info.VerticalFlip = h < 0;
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info.BPP = reader.ReadInt32();
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info.ClippedPixel = reader.ReadInt32();
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info.SamplingFlags = reader.ReadInt32();
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info.QuantumizedBits = reader.ReadUInt64();
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info.AllottedBits = reader.ReadUInt64();
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info.BlockingDegree = reader.ReadInt32();
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info.LappedBlock = reader.ReadInt32();
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info.FrameTransform = reader.ReadInt32();
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info.FrameDegree = reader.ReadInt32();
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}
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else if ("descript" == section.Id)
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{
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if (0xFEFF == reader.PeekChar())
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{
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reader.Read();
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var desc_chars = reader.ReadChars ((int)section.Length/2 - 1);
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desc = new string (desc_chars);
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}
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else
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{
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var desc_chars = reader.ReadBytes ((int)section.Length);
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desc = Encoding.UTF8.GetString (desc_chars);
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}
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}
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else
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{
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reader.BaseStream.Seek (section.Length, SeekOrigin.Current);
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}
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header_size -= (int)section.Length;
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}
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if (info != null)
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{
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if (file_header != null)
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info.Header = file_header;
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if (desc != null)
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info.Description = desc;
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}
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return info;
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var reader = ReadImageData (stream, (EriMetaData)info);
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return ImageData.Create (info, reader.Format, reader.Palette, reader.Data, reader.Stride);
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}
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private Color[] ReadPalette (Stream input, int palette_length)
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{
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var palette_data = new byte[0x400];
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if (palette_length > palette_data.Length)
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throw new InvalidFormatException();
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if (palette_length != input.Read (palette_data, 0, palette_length))
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throw new InvalidFormatException();
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var colors = new Color[256];
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for (int i = 0; i < 256; ++i)
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{
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colors[i] = Color.FromRgb (palette_data[i*4+2], palette_data[i*4+1], palette_data[i*4]);
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}
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return colors;
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}
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private EriReader ReadImageData (Stream stream, EriMetaData meta)
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{
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stream.Position = meta.StreamPos;
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using (var input = new EriFile (stream))
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{
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Color[] palette = null;
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for (;;) // ReadSection throws an exception in case of EOF
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{
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var section = input.ReadSection();
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if ("Stream " == section.Id)
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continue;
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if ("ImageFrm" == section.Id)
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break;
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if ("Palette " == section.Id && meta.BPP <= 8 && section.Length <= 0x400)
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{
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palette = ReadPalette (stream, (int)section.Length);
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continue;
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}
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input.BaseStream.Seek (section.Length, SeekOrigin.Current);
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}
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var reader = new EriReader (stream, meta, palette);
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reader.DecodeImage();
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if (!string.IsNullOrEmpty (meta.Description))
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{
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var tags = ParseTagInfo (meta.Description);
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string ref_file;
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if (tags.TryGetValue ("reference-file", out ref_file))
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{
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ref_file = ref_file.TrimEnd (null);
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if (!string.IsNullOrEmpty (ref_file))
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{
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if ((meta.BPP + 7) / 8 < 3)
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throw new InvalidFormatException();
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ref_file = VFS.CombinePath (Path.GetDirectoryName (meta.FileName), ref_file);
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using (var ref_src = VFS.OpenSeekableStream (ref_file))
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{
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var ref_info = ReadMetaData (ref_src) as EriMetaData;
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if (null == ref_info)
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throw new FileNotFoundException ("Referenced image not found");
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ref_info.FileName = ref_file;
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var ref_reader = ReadImageData (ref_src, ref_info);
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AddImageBuffer (meta, reader.Data, ref_info, ref_reader.Data);
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}
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}
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}
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}
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return reader;
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}
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}
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void AddImageBuffer (EriMetaData dst_info, byte[] dst_img, EriMetaData src_info, byte[] src_img)
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{
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int src_bpp = (src_info.BPP + 7) / 8;
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int dst_bpp = (dst_info.BPP + 7) / 8;
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bool has_alpha = src_bpp == 4 && src_bpp == dst_bpp;
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int dst = 0;
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int src = 0;
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while (dst < dst_img.Length)
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{
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dst_img[dst ] += src_img[src ];
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dst_img[dst+1] += src_img[src+1];
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dst_img[dst+2] += src_img[src+2];
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if (has_alpha)
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dst_img[dst+3] += src_img[src+3];
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dst += dst_bpp;
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src += src_bpp;
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}
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}
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static readonly Regex s_TagRe = new Regex (@"^\s*#\s*(\S+)");
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Dictionary<string, string> ParseTagInfo (string desc)
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{
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var dict = new Dictionary<string, string>();
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if (string.IsNullOrEmpty (desc))
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{
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return dict;
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}
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if ('#' != desc[0])
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{
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dict["comment"] = desc;
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return dict;
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}
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var tag_value = new StringBuilder();
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using (var reader = new StringReader (desc))
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{
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string line = reader.ReadLine();
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while (null != line)
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{
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var match = s_TagRe.Match (line);
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if (!match.Success)
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break;
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string tag = match.Groups[1].Value;
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tag_value.Clear();
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for (;;)
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{
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line = reader.ReadLine();
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if (null == line)
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break;
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if (line.StartsWith ("#"))
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{
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if (line.Length < 2 || '#' != line[1])
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break;
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line = line.Substring (1);
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}
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tag_value.AppendLine (line);
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}
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dict[tag] = tag_value.ToString();
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}
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}
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return dict;
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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 NotImplementedException ("EriFormat.Write not implemented");
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}
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}
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}
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