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339 lines
12 KiB
C#
339 lines
12 KiB
C#
//! \file ImageHG3.cs
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//! \date Sat Jul 19 17:31:09 2014
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//! \brief CatSystem HG3 image format implementation.
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//
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// Copyright (C) 2014-2015 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.IO;
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using System.ComponentModel.Composition;
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using System.Windows.Media.Imaging;
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using System.Windows.Media;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.CatSystem
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{
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internal class HgMetaData : ImageMetaData
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{
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public uint CanvasWidth;
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public uint CanvasHeight;
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public uint HeaderSize;
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}
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[Export(typeof(ImageFormat))]
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public class Hg3Format : ImageFormat
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{
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public override string Tag { get { return "HG3"; } }
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public override string Description { get { return "CatSystem engine image format"; } }
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public override uint Signature { get { return 0x332d4748; } } // 'HG-3'
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x4c);
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if (header.ToUInt32 (4) != 0x0c)
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return null;
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if (!header.AsciiEqual (0x14, "stdinfo\0"))
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return null;
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return new HgMetaData
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{
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HeaderSize = header.ToUInt32 (0x1C),
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Width = header.ToUInt32 (0x24),
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Height = header.ToUInt32 (0x28),
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OffsetX = header.ToInt32 (0x30),
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OffsetY = header.ToInt32 (0x34),
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BPP = header.ToInt32 (0x2C),
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CanvasWidth = header.ToUInt32 (0x44),
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CanvasHeight = header.ToUInt32 (0x48),
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};
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}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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var meta = (HgMetaData)info;
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if (32 != meta.BPP && 24 != meta.BPP)
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throw new NotSupportedException ("Not supported HG-3 color depth");
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using (var reg = new StreamRegion (stream.AsStream, 0x14, true))
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using (var input = new BinaryStream (reg, stream.Name))
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using (var reader = new Hg3Reader (input, meta))
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{
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return reader.Image;
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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 NotImplementedException ("Hg3Format.Write not implemented");
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}
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}
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internal class HgReader : IImageDecoder
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{
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protected IBinaryStream m_input;
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protected HgMetaData m_info;
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protected int m_pixel_size;
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protected ImageData m_image;
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public Stream Source { get { return m_input.AsStream; } }
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public ImageFormat SourceFormat { get { return null; } }
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public ImageMetaData Info { get { return m_info; } }
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public virtual ImageData Image { get { throw new NotImplementedException(); } }
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public int Stride { get; protected set; }
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protected HgReader (IBinaryStream input, HgMetaData info)
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{
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m_input = input;
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m_info = info;
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m_pixel_size = m_info.BPP / 8;
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Stride = (int)m_info.Width * m_pixel_size;
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}
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public byte[] UnpackStream (long data_offset, int data_packed, int data_unpacked, int ctl_packed, int ctl_unpacked)
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{
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var ctl_offset = data_offset + data_packed;
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var data = new byte[data_unpacked];
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using (var z = new StreamRegion (Source, data_offset, data_packed, true))
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using (var data_in = new ZLibStream (z, CompressionMode.Decompress))
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if (data.Length != data_in.Read (data, 0, data.Length))
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throw new EndOfStreamException();
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using (var z = new StreamRegion (Source, ctl_offset, ctl_packed, true))
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using (var ctl_in = new ZLibStream (z, CompressionMode.Decompress))
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using (var bits = new LsbBitStream (ctl_in))
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{
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bool copy = bits.GetNextBit() != 0;
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int output_size = GetBitCount (bits);
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var output = new byte[output_size];
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int src = 0;
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int dst = 0;
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while (dst < output_size)
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{
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int count = GetBitCount (bits);
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if (copy)
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{
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Buffer.BlockCopy (data, src, output, dst, count);
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src += count;
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}
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dst += count;
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copy = !copy;
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}
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return ApplyDelta (output);
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}
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}
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static int GetBitCount (LsbBitStream bits)
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{
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int n = 0;
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while (0 == bits.GetNextBit())
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{
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++n;
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if (n >= 0x20)
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throw new InvalidFormatException ("Overflow at HgReader.GetBitCount");
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}
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int value = 1;
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while (n --> 0)
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{
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value = (value << 1) | bits.GetNextBit();
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}
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return value;
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}
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byte[] ApplyDelta (byte[] pixels)
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{
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var table = new uint[4, 0x100];
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for (uint i = 0; i < 0x100; ++i)
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{
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uint val = i & 0xC0;
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val <<= 6;
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val |= i & 0x30;
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val <<= 6;
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val |= i & 0x0C;
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val <<= 6;
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val |= i & 0x03;
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table[0,i] = val << 6;
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table[1,i] = val << 4;
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table[2,i] = val << 2;
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table[3,i] = val;
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}
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int plane_size = pixels.Length / 4;
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int plane0 = 0;
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int plane1 = plane0 + plane_size;
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int plane2 = plane1 + plane_size;
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int plane3 = plane2 + plane_size;
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byte[] output = new byte[pixels.Length];
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int dst = 0;
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while (dst < output.Length)
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{
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uint val = table[0,pixels[plane0++]] | table[1,pixels[plane1++]]
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| table[2,pixels[plane2++]] | table[3,pixels[plane3++]];
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output[dst++] = ConvertValue ((byte)val);
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output[dst++] = ConvertValue ((byte)(val >> 8));
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output[dst++] = ConvertValue ((byte)(val >> 16));
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output[dst++] = ConvertValue ((byte)(val >> 24));
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}
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for (int x = m_pixel_size; x < Stride; x++)
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{
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output[x] += output[x - m_pixel_size];
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}
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int prev = 0;
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for (uint y = 1; y < m_info.Height; y++)
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{
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int line = prev + Stride;
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for (int x = 0; x < Stride; x++)
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{
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output[line+x] += output[prev+x];
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}
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prev = line;
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}
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return output;
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}
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static byte ConvertValue (byte val)
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{
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bool carry = 0 != (val & 1);
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val >>= 1;
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return (byte)(carry ? val ^ 0xFF : val);
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}
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#region IDisposable Members
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public void Dispose ()
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{
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GC.SuppressFinalize (this);
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}
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#endregion
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}
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internal sealed class Hg3Reader : HgReader
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{
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public bool Flipped { get; private set; }
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public override ImageData Image
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{
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get
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{
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if (null == m_image)
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{
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var pixels = Unpack();
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PixelFormat format = 24 == m_info.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
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if (Flipped)
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m_image = ImageData.CreateFlipped (Info, format, null, pixels, Stride);
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else
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m_image = ImageData.Create (Info, format, null, pixels, Stride);
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}
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return m_image;
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}
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}
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public Hg3Reader (IBinaryStream input, HgMetaData info) : base (input, info)
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{
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}
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public byte[] Unpack ()
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{
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Source.Position = m_info.HeaderSize;
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var img_type = m_input.ReadBytes (8);
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if (Binary.AsciiEqual (img_type, "img0000\0"))
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return UnpackImg0000();
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else if (Binary.AsciiEqual (img_type, "img_jpg\0"))
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return UnpackJpeg();
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else if (Binary.AsciiEqual (img_type, "img_wbp\0"))
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return UnpackWebp();
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else
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throw new NotSupportedException ("Not supported HG-3 image");
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}
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byte[] UnpackImg0000 ()
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{
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Flipped = true;
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Source.Position = m_info.HeaderSize+0x18;
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int packed_data_size = m_input.ReadInt32();
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int data_size = m_input.ReadInt32();
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int packed_ctl_size = m_input.ReadInt32();
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int ctl_size = m_input.ReadInt32();
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return UnpackStream (m_info.HeaderSize+0x28, packed_data_size, data_size, packed_ctl_size, ctl_size);
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}
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byte[] UnpackJpeg ()
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{
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Flipped = false;
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m_input.ReadInt32();
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var jpeg_size = m_input.ReadInt32();
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long next_section = Source.Position + jpeg_size;
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var decoder = new JpegBitmapDecoder (Source,
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BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
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var frame = decoder.Frames[0];
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if (frame.Format.BitsPerPixel < 24)
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throw new NotSupportedException ("Not supported HG-3 JPEG color depth");
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int src_pixel_size = frame.Format.BitsPerPixel/8;
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int stride = (int)m_info.Width * src_pixel_size;
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var pixels = new byte[stride*(int)m_info.Height];
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frame.CopyPixels (pixels, stride, 0);
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var output = new byte[m_info.Width*m_info.Height*4];
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uint total = m_info.Width * m_info.Height;
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int src = 0;
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int dst = 0;
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for (uint i = 0; i < total; ++i)
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{
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output[dst++] = pixels[src];
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output[dst++] = pixels[src+1];
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output[dst++] = pixels[src+2];
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output[dst++] = 0xFF;
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src += src_pixel_size;
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}
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m_input.Position = next_section;
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var section_header = m_input.ReadBytes (8);
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if (!Binary.AsciiEqual (section_header, "img_al\0\0"))
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return output;
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m_input.Seek (8, SeekOrigin.Current);
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int alpha_size = m_input.ReadInt32();
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using (var alpha_in = new StreamRegion (Source, Source.Position+4, alpha_size, true))
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using (var alpha = new ZLibStream (alpha_in, CompressionMode.Decompress))
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{
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for (int i = 3; i < output.Length; i += 4)
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{
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int b = alpha.ReadByte();
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if (-1 == b)
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throw new EndOfStreamException();
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output[i] = (byte)b;
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}
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return output;
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}
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}
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byte[] UnpackWebp ()
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{
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throw new NotImplementedException ("HG-3 WebP decoder not implemented.");
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}
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}
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}
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