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309 lines
10 KiB
C#
309 lines
10 KiB
C#
//! \file ImageGRD.cs
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//! \date Wed Dec 23 17:00:30 2015
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//! \brief Tmr-Hiro ADV System 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 GameRes.Utility;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media;
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using System.Collections.Generic;
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namespace GameRes.Formats.TmrHiro
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{
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internal class GrdMetaData : ImageMetaData
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{
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public int Format;
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public int AlphaSize;
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public int RSize;
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public int GSize;
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public int BSize;
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}
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[Export(typeof(ImageFormat))]
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public class GrdFormat : ImageFormat
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{
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public override string Tag { get { return "GRD/TMR-HIRO"; } }
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public override string Description { get { return "Tmr-Hiro ADV System image format"; } }
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public override uint Signature { get { return 0; } }
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public GrdFormat ()
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{
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Extensions = new string[] { "grd", "" };
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[0x20];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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if (header[0] != 1 && header[0] != 2)
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return null;
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if (header[1] != 1 && header[1] != 0xA1 && header[1] != 0xA2)
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return null;
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int bpp = LittleEndian.ToUInt16 (header, 6);
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if (bpp != 24 && bpp != 32)
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return null;
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int screen_width = LittleEndian.ToUInt16 (header, 2);
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int screen_height = LittleEndian.ToUInt16 (header, 4);
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int left = LittleEndian.ToUInt16 (header, 8);
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int right = LittleEndian.ToUInt16 (header, 0xA);
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int top = LittleEndian.ToUInt16 (header, 0xC);
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int bottom = LittleEndian.ToUInt16 (header, 0xE);
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var info = new GrdMetaData {
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Format = LittleEndian.ToUInt16 (header, 0),
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Width = (uint)(right-left),
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Height = (uint)(bottom-top),
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BPP = bpp,
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OffsetX = left,
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OffsetY = screen_height - bottom,
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AlphaSize = LittleEndian.ToInt32 (header, 0x10),
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RSize = LittleEndian.ToInt32 (header, 0x14),
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GSize = LittleEndian.ToInt32 (header, 0x18),
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BSize = LittleEndian.ToInt32 (header, 0x1C),
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};
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if (0x20 + info.AlphaSize + info.RSize + info.BSize + info.GSize != stream.Length)
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return null;
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return info;
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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 meta = (GrdMetaData)info;
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var reader = new GrdReader (stream, meta);
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Data);
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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 ("GrdFormat.Write not implemented");
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}
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}
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internal sealed class GrdReader
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{
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Stream m_input;
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GrdMetaData m_info;
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byte[] m_output;
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int m_pack_type;
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int m_pixel_size;
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byte[] m_channel;
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public PixelFormat Format { get; private set; }
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public byte[] Data { get { return m_output; } }
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public GrdReader (Stream input, GrdMetaData info)
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{
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m_input = input;
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m_info = info;
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if (24 == m_info.BPP)
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Format = PixelFormats.Bgr24;
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else if (m_info.AlphaSize > 0)
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Format = PixelFormats.Bgra32;
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else
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Format = PixelFormats.Bgr32;
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int channel_size = (int)(m_info.Width * m_info.Height);
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m_pack_type = m_info.Format >> 8;
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m_pixel_size = m_info.BPP / 8;
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m_output = new byte[m_pixel_size * channel_size];
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m_channel = new byte[channel_size];
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}
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public void Unpack ()
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{
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int next_pos = 0x20;
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if (32 == m_info.BPP && m_info.AlphaSize > 0)
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{
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UnpackChannel (3, next_pos, m_info.AlphaSize);
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next_pos += m_info.AlphaSize;
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}
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UnpackChannel (2, next_pos, m_info.RSize);
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next_pos += m_info.RSize;
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UnpackChannel (1, next_pos, m_info.GSize);
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next_pos += m_info.GSize;
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UnpackChannel (0, next_pos, m_info.BSize);
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}
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void UnpackChannel (int dst, int src_pos, int src_size)
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{
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m_input.Position = src_pos;
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if (1 == m_pack_type)
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{
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UnpackRLE (m_input, src_size);
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}
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else
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{
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var data = UnpackHuffman (m_input);
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if (0xA2 == m_pack_type)
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{
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UnpackLZ77 (data, m_channel);
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}
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else
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{
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using (var mem = new MemoryStream (data))
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UnpackRLE (mem, data.Length);
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}
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}
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for (int y = (int)m_info.Height-1; y >= 0; --y)
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{
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int src = y * (int)m_info.Width;
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for (uint x = 0; x < m_info.Width; ++x)
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{
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m_output[dst] = m_channel[src++];
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dst += m_pixel_size;
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}
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}
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}
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void UnpackRLE (Stream input, int src_size)
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{
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int src = 0;
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int dst = 0;
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while (src < src_size)
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{
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int count = input.ReadByte();
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if (-1 == count)
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return;
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++src;
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if (count > 0x7F)
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{
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count &= 0x7F;
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byte v = (byte)input.ReadByte();
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++src;
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for (int i = 0; i < count; ++i)
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m_channel[dst++] = v;
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}
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else
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{
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input.Read (m_channel, dst, count);
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src += count;
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dst += count;
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}
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}
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}
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static void UnpackLZ77 (byte[] input, byte[] output)
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{
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var special = input[8];
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int src = 12;
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int dst = 0;
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while (dst < output.Length)
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{
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byte b = input[src++];
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if (b == special)
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{
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byte offset = input[src++];
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if (offset != special)
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{
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byte count = input[src++];
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if (offset > special)
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--offset;
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Binary.CopyOverlapped (output, dst - offset, dst, count);
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dst += count;
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}
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else
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output[dst++] = offset;
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}
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else
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output[dst++] = b;
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}
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}
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const int RootNodeIndex = 0x1FE;
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int m_huffman_unpacked;
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byte[] UnpackHuffman (Stream input)
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{
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var tree = CreateHuffmanTree (input);
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var unpacked = new byte[m_huffman_unpacked];
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using (var bits = new LsbBitStream (input, true))
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{
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int dst = 0;
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while (dst < m_huffman_unpacked)
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{
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int node = RootNodeIndex;
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while (node > 0xFF)
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{
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if (0 != bits.GetNextBit())
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node = tree[node].Right;
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else
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node = tree[node].Left;
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}
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unpacked[dst++] = (byte)node;
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}
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}
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return unpacked;
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}
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HuffmanNode[] CreateHuffmanTree (Stream input)
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{
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var nodes = new HuffmanNode[0x200];
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var tree = new List<int> (0x100);
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using (var reader = new ArcView.Reader (input))
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{
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m_huffman_unpacked = reader.ReadInt32();
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reader.ReadInt32(); // packed_size
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for (int i = 0; i < 0x100; i++)
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{
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nodes[i].Freq = reader.ReadUInt32();
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AddNode (tree, nodes, i);
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}
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}
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int last_node = 0x100;
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while (tree.Count > 1)
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{
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int l = tree[0];
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tree.RemoveAt (0);
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int r = tree[0];
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tree.RemoveAt (0);
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nodes[last_node].Freq = nodes[l].Freq + nodes[r].Freq;
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nodes[last_node].Left = l;
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nodes[last_node].Right = r;
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AddNode (tree, nodes, last_node++);
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}
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return nodes;
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}
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static void AddNode (List<int> tree, HuffmanNode[] nodes, int index)
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{
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uint freq = nodes[index].Freq;
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int i;
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for (i = 0; i < tree.Count; ++i)
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if (nodes[tree[i]].Freq > freq)
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break;
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tree.Insert (i, index);
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}
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internal struct HuffmanNode
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{
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public uint Freq;
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public int Left;
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public int Right;
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}
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}
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}
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