mirror of
https://github.com/crskycode/GARbro.git
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392 lines
14 KiB
C#
392 lines
14 KiB
C#
//! \file ImageAG.cs
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//! \date Sun May 10 23:53:34 2015
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//! \brief Masys Enhanced Game Unit 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.ComponentModel.Composition;
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using System.Windows.Media;
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using System.IO;
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using GameRes.Utility;
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namespace GameRes.Formats.Megu
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{
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[Export(typeof(ImageFormat))]
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public class AgFormat : ImageFormat
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{
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public override string Tag { get { return "ACG"; } }
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public override string Description { get { return "Masys image format"; } }
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public override uint Signature { get { return 0x00644741u; } } // 'AGd'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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using (var file = new ArcView.Reader (stream))
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{
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file.ReadUInt32();
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var info = new ImageMetaData();
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info.Width = file.ReadUInt32();
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info.Height = file.ReadUInt32();
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file.BaseStream.Position = 0x38;
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int alpha_size = file.ReadInt32();
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info.BPP = 0 == alpha_size ? 24 : 32;
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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 = new AgReader (stream, info);
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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 NotImplementedException ("AgFormat.Write not implemented");
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}
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}
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internal class AgReader
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{
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byte[] in1;
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byte[] in2;
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byte[] in3;
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byte[] in4;
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byte[] in5;
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byte[] m_alpha;
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byte[] m_output;
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int m_width;
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int m_height;
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int m_pixel_size;
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byte[] m_first = new byte[3];
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public byte[] Data { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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public AgReader (Stream stream, ImageMetaData info)
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{
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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stream.Position = 0x0c;
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using (var input = new ArcView.Reader (stream))
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{
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uint offset1 = input.ReadUInt32();
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int size1 = input.ReadInt32();
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uint offset2 = input.ReadUInt32();
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int size2 = input.ReadInt32();
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uint offset3 = input.ReadUInt32();
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int size3 = input.ReadInt32();
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uint offset4 = input.ReadUInt32();
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int size4 = input.ReadInt32();
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uint offset5 = input.ReadUInt32();
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int size5 = input.ReadInt32();
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uint offset6 = input.ReadUInt32();
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int size6 = input.ReadInt32();
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input.Read (m_first, 0, 3);
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if (size1 != 0)
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in1 = ReadSection (stream, offset1, size1);
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if (size2 != 0)
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in2 = ReadSection (stream, offset2, size2);
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if (size3 != 0)
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in3 = ReadSection (stream, offset3, size3);
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if (size4 != 0)
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in4 = ReadSection (stream, offset4, size4);
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if (size5 != 0)
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in5 = ReadSection (stream, offset5, size5);
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if (size6 != 0)
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{
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input.BaseStream.Position = offset6;
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m_alpha = new byte[m_height*m_width];
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RleDecode (input, m_alpha);
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Format = PixelFormats.Bgra32;
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m_pixel_size = 4;
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}
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else
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{
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Format = PixelFormats.Bgr24;
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m_pixel_size = 3;
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}
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m_output = new byte[m_width*m_height*m_pixel_size];
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}
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}
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static private byte[] ReadSection (Stream input, long offset, int size)
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{
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input.Position = offset;
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var buf = new byte[size + 4];
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if (size != input.Read (buf, 0, size))
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throw new InvalidFormatException ("Unexpected end of file");
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return buf;
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}
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public void Unpack ()
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{
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int v20 = 1;
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int src1 = 0;
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uint v25 = LittleEndian.ToUInt32 (in1, src1);
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src1 += 4;
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int v5 = 1;
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int src2 = 0;
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uint v24 = LittleEndian.ToUInt32 (in2, src2);
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src2 += 4;
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int v4 = 1;
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int src3 = 0;
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uint v23 = LittleEndian.ToUInt32 (in3, src3);
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src3 += 4;
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int v3 = 0;
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int src4 = 0;
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uint v22 = LittleEndian.ToUInt32 (in4, src4);
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src4 += 4;
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int v19 = 0;
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int src5 = 0;
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uint v21 = LittleEndian.ToUInt32 (in5, src5);
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src5 += 4;
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byte B;
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byte G;
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byte R;
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int stride = m_width * m_pixel_size;
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for (int y = 0; y < m_height; ++y)
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{
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int dst = y * stride;
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for (int x = 0; x < stride; x += m_pixel_size)
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{
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if (0 != (v20 & v25))
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{
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B = (byte)(v21 >> v19);
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v19 += 8;
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if (32 == v19)
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{
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v21 = LittleEndian.ToUInt32 (in5, src5);
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src5 += 4;
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v19 = 0;
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}
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}
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else
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{
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if (0 != (v4 & v23))
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{
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B = m_first[0];
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}
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else
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{
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B = (byte)((v22 >> v3) & 0xF);
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v3 += 4;
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if (32 == v3)
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{
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v22 = LittleEndian.ToUInt32 (in4, src4);
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src4 += 4;
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v3 = 0;
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}
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++B;
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if (0 != (v5 & v24))
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B = (byte)(m_first[0] - B);
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else
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B += m_first[0];
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v5 <<= 1;
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if (0 == v5)
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{
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v5 = 1;
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v24 = LittleEndian.ToUInt32 (in2, src2);
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src2 += 4;
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}
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}
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v4 <<= 1;
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if (0 == v4)
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{
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v4 = 1;
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v23 = LittleEndian.ToUInt32 (in3, src3);
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src3 += 4;
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}
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}
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v20 <<= 1;
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if (0 == v20)
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{
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v25 = LittleEndian.ToUInt32 (in1, src1);
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src1 += 4;
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v20 = 1;
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}
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if (0 != (v20 & v25))
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{
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G = (byte)(v21 >> v19);
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v19 += 8;
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if (32 == v19)
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{
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v21 = LittleEndian.ToUInt32 (in5, src5);
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src5 += 4;
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v19 = 0;
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}
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}
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else
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{
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if (0 != (v4 & v23))
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{
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G = m_first[1];
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}
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else
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{
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G = (byte)((v22 >> v3) & 0xF);
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v3 += 4;
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if (32 == v3)
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{
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v22 = LittleEndian.ToUInt32 (in4, src4);
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src4 += 4;
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v3 = 0;
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}
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++G;
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if (0 != (v5 & v24))
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G = (byte)(m_first[1] - G);
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else
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G += m_first[1];
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v5 <<= 1;
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if (0 == v5)
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{
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v5 = 1;
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v24 = LittleEndian.ToUInt32 (in2, src2);
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src2 += 4;
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}
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}
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v4 <<= 1;
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if (0 == v4)
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{
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v4 = 1;
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v23 = LittleEndian.ToUInt32 (in3, src3);
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src3 += 4;
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}
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}
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v20 <<= 1;
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if (0 == v20)
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{
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v25 = LittleEndian.ToUInt32 (in1, src1);
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src1 += 4;
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v20 = 1;
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}
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if (0 != (v20 & v25))
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{
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R = (byte)(v21 >> v19);
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v19 += 8;
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if (32 == v19)
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{
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v21 = LittleEndian.ToUInt32 (in5, src5);
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src5 += 4;
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v19 = 0;
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}
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}
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else
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{
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if (0 != (v4 & v23))
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{
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R = m_first[2];
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}
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else
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{
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R = (byte)((v22 >> v3) & 0xF);
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v3 += 4;
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if (32 == v3)
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{
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v22 = LittleEndian.ToUInt32 (in4, src4);
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src4 += 4;
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v3 = 0;
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}
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++R;
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if (0 != (v5 & v24))
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R = (byte)(m_first[2] - R);
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else
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R += m_first[2];
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v5 <<= 1;
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if (0 == v5)
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{
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v5 = 1;
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v24 = LittleEndian.ToUInt32 (in2, src2);
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src2 += 4;
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}
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}
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v4 <<= 1;
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if (0 == v4)
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{
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v4 = 1;
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v23 = LittleEndian.ToUInt32 (in3, src3);
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src3 += 4;
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}
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}
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v20 <<= 1;
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if (0 == v20)
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{
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v25 = LittleEndian.ToUInt32 (in1, src1);
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src1 += 4;
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v20 = 1;
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}
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m_output[dst+x] = B;
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m_output[dst+x+1] = G;
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m_output[dst+x+2] = R;
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m_first[0] = B;
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m_first[1] = G;
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m_first[2] = R;
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}
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m_first[0] = m_output[dst];
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m_first[1] = m_output[dst+1];
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m_first[2] = m_output[dst+2];
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}
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if (m_alpha != null)
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ApplyAlpha();
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}
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private void ApplyAlpha ()
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{
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int src = 0;
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for (int i = 3; i < m_output.Length; i += 4)
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{
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int alpha = Math.Min (m_alpha[src++]*0xff/0x40, 0xff);
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m_output[i] = (byte)alpha;
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}
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}
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private static void RleDecode (BinaryReader src, byte[] dst_buf)
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{
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int remaining = dst_buf.Length;
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int dst = 0;
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while (remaining > 0)
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{
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byte v = src.ReadByte();
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int count;
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if (0 != (v & 0x80))
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{
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v &= 0x7F;
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count = src.ReadUInt16();
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for (int j = 0; j < count; ++j)
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{
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dst_buf[dst++] = v;
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}
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}
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else
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{
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dst_buf[dst++] = v;
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count = 1;
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}
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remaining -= count;
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}
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}
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}
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}
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