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408 lines
15 KiB
C#
408 lines
15 KiB
C#
//! \file ImagePB3.cs
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//! \date Wed Dec 02 13:55:45 2015
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//! \brief Cmvs engine 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;
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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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namespace GameRes.Formats.Purple
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{
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internal class Pb3MetaData : ImageMetaData
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{
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public int Type;
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public int SubType;
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public int InputSize;
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}
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[Export(typeof(ImageFormat))]
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public class Pb3Format : ImageFormat
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{
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public override string Tag { get { return "PB3"; } }
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public override string Description { get { return "Purple Software image format"; } }
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public override uint Signature { get { return 0x42334250; } } // 'PB3B'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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stream.Position = 4;
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using (var reader = new ArcView.Reader (stream))
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{
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int input_size = reader.ReadInt32();
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stream.Position = 0x18;
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int t2 = reader.ReadInt32();
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int t1 = reader.ReadUInt16();
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uint width = reader.ReadUInt16();
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uint height = reader.ReadUInt16();
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int bpp = reader.ReadUInt16();
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return new Pb3MetaData
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{
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Width = width,
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Height = height,
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BPP = bpp,
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Type = t1,
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SubType = t2,
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InputSize = input_size,
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};
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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 Pb3Reader (stream, (Pb3MetaData)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 System.NotImplementedException ("Pb3Format.Write not implemented");
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}
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}
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internal sealed class Pb3Reader
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{
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byte[] m_input;
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Pb3MetaData m_info;
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int m_channels;
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int m_stride;
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byte[] m_output;
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byte[] m_lzss_frame;
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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 Pb3Reader (Stream input, Pb3MetaData info)
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{
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if (info.Type == 1 && info.SubType != 0x10)
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throw new NotSupportedException();
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m_info = info;
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m_input = new byte[m_info.InputSize];
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if (m_input.Length != input.Read (m_input, 0, m_input.Length))
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throw new EndOfStreamException();
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m_channels = m_info.BPP / 8;
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m_stride = 4 * (int)m_info.Width;
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m_lzss_frame = new byte[0x800];
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Format = m_channels < 4 ? PixelFormats.Bgr32 : PixelFormats.Bgra32;
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// output array created by unpack methods as needed.
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}
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public void Unpack ()
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{
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switch (m_info.Type)
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{
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default: throw new InvalidEncryptionScheme();
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case 1: UnpackV1(); break;
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case 5: UnpackV5(); break;
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case 8:
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case 6: UnpackV6(); break;
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case 2:
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case 3:
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case 4:
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case 7: throw new NotSupportedException(string.Format ("PB3 v{0} images not supported", m_info.Type));
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// V3 is pain in the ass to implement, machine code is full of unrolled loops resulting in a
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// thousands lines of spaghetti code.
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}
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}
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void UnpackV1 ()
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{
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int width = (int)m_info.Width;
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int height = (int)m_info.Height;
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m_output = new byte[m_stride * height];
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int plane_size = width * height;
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byte[] plane = new byte[plane_size];
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int data1 = LittleEndian.ToInt32 (m_input, 0x2C);
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int data2 = LittleEndian.ToInt32 (m_input, 0x30);
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for (int channel = 0; channel < m_channels; ++channel)
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{
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int channel_offset = 4 * m_channels;
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for (int i = 0; i < channel; ++i)
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channel_offset += LittleEndian.ToInt32 (m_input, data1 + 4*i);
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int v21 = data1 + channel_offset;
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int bit_src = v21 + 12 + LittleEndian.ToInt32 (m_input, v21) + LittleEndian.ToInt32 (m_input, v21+4);
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int channel_size = LittleEndian.ToInt32 (m_input, v21 + 8);
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channel_offset = 4 * m_channels;
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for (int i = 0; i < channel; ++i)
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channel_offset += LittleEndian.ToInt32 (m_input, data2 + 4*i);
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int data_src = data2 + channel_offset;
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for (int i = 0; i < 0x7DE; ++i)
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m_lzss_frame[i] = 0;
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LzssUnpack (bit_src, data_src, plane, channel_size);
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int x_blocks = width >> 4;
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if (0 != (width & 0xF))
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++x_blocks;
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int y_blocks = height >> 4;
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if (0 != (height & 0xF))
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++y_blocks;
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if (0 == y_blocks || 0 == x_blocks)
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continue;
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int plane_src = 0;
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bit_src = v21 + 12;
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int bit_mask = 128;
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data_src = bit_src + LittleEndian.ToInt32 (m_input, v21);
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int v68 = 16;
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for (int y = 0; y < y_blocks; ++y)
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{
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int row = 16 * y;
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int v66 = 16;
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int dst_origin = m_stride * row + channel; // within m_output
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for (int x = 0; x < x_blocks; ++x)
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{
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int dst = dst_origin;
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int block_width = v66 > width ? width - 16 * x : 16;
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int block_height = v68 > height ? height - row : 16;
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if (0 == bit_mask)
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{
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++bit_src;
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bit_mask = 128;
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}
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if (0 != (bit_mask & m_input[bit_src]))
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{
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byte b = m_input[data_src++];
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for (int j = 0; j < block_height; ++j)
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{
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int v49 = dst;
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for (int i = 0; i < block_width; ++i)
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{
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m_output[v49] = b;
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v49 += 4;
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}
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dst += m_stride;
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}
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}
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else
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{
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for (int j = 0; j < block_height; ++j)
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{
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int v49 = dst;
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for (int i = 0; i < block_width; ++i)
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{
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m_output[v49] = plane[plane_src++];
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v49 += 4;
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}
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dst += m_stride;
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}
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}
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bit_mask >>= 1;
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v66 += 16;
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dst_origin += 64;
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}
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v68 += 16;
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}
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}
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}
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void UnpackV5 ()
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{
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m_output = new byte[m_stride * (int)m_info.Height];
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for (int i = 0; i < 4; ++i)
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{
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int bit_src = 0x54 + LittleEndian.ToInt32 (m_input, 8 * i + 0x34);
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int data_src = 0x54 + LittleEndian.ToInt32 (m_input, 8 * i + 0x38);
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for (int j = 0; j < 0x7DE; ++j)
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m_lzss_frame[j] = 0;
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int frame_offset = 0x7DE;
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byte accum = 0;
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int bit_mask = 128;
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int dst = i;
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while (dst < m_output.Length)
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{
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if (0 == bit_mask)
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{
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++bit_src;
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bit_mask = 128;
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}
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if (0 != (bit_mask & m_input[bit_src]))
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{
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int v = LittleEndian.ToUInt16 (m_input, data_src);
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data_src += 2;
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int count = (v & 0x1F) + 3;
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int offset = v >> 5;
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for (int k = 0; k < count; ++k)
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{
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byte b = m_lzss_frame[(k + offset) & 0x7FF];
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m_lzss_frame[frame_offset++] = b;
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accum += b;
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m_output[dst] = accum;
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dst += 4;
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frame_offset &= 0x7FF;
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}
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}
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else
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{
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byte b = m_input[data_src++];
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m_lzss_frame[frame_offset++] = b;
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accum += b;
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m_output[dst] = accum;
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dst += 4;
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frame_offset &= 0x7FF;
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}
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bit_mask >>= 1;
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}
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}
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}
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static readonly byte[] NameKeyV6 = {
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0xA6, 0x75, 0xF3, 0x9C, 0xC5, 0x69, 0x78, 0xA3, 0x3E, 0xA5, 0x4F, 0x79, 0x59, 0xFE, 0x3A, 0xC7,
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};
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void UnpackV6 ()
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{
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var name_bytes = new byte[0x20];
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int name_offset = 0x34;
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int i;
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for (i = 0; i < 0x20; ++i)
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{
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name_bytes[i] = (byte)(m_input[name_offset+i] ^ NameKeyV6[i & 0xF]);
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if (0 == name_bytes[i])
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break;
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}
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m_output = LoadBaseImage (Encodings.cp932.GetString (name_bytes, 0, i) + ".pb3");
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BlendInput();
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}
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byte[] LoadBaseImage (string name)
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{
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// judging by the code, files with "pb3" extension could as well contain PNG or BMP images,
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// so we couldn't just shortcut to another instance of Pb3Reader here.
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var path = VFS.GetDirectoryName (m_info.FileName);
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name = VFS.CombinePath (path, name);
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if (name.Equals (m_info.FileName, StringComparison.InvariantCultureIgnoreCase))
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throw new InvalidFormatException();
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// two files referencing each other still could create infinite recursion
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using (var base_file = VFS.OpenSeekableStream (name))
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{
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var image_data = ImageFormat.Read (name, base_file);
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int stride = image_data.Bitmap.PixelWidth * 4;
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var pixels = new byte[stride * image_data.Bitmap.PixelHeight];
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image_data.Bitmap.CopyPixels (pixels, stride, 0);
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return pixels;
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}
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}
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void LzssUnpack (int bit_src, int data_src, byte[] output, int output_size)
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{
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int dst = 0;
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int bit_mask = 0x80;
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int frame_offset = 0x7DE;
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while (dst < output_size)
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{
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if (0 == bit_mask)
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{
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bit_mask = 0x80;
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++bit_src;
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}
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if (0 != (bit_mask & m_input[bit_src]))
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{
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int v = LittleEndian.ToUInt16 (m_input, data_src);
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data_src += 2;
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int count = (v & 0x1F) + 3;
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int offset = v >> 5;
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for (int i = 0; i < count; ++i)
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{
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byte b = m_lzss_frame[(i + offset) & 0x7FF];
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output[dst++] = b;
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m_lzss_frame[frame_offset++] = b;
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frame_offset &= 0x7FF;
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}
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}
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else
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{
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byte b = m_input[data_src++];
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output[dst++] = b;
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m_lzss_frame[frame_offset++] = b;
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frame_offset &= 0x7FF;
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}
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bit_mask >>= 1;
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}
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}
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void BlendInput ()
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{
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int bit_src = 0x20 + LittleEndian.ToInt32 (m_input, 0xC);
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int data_src = bit_src + LittleEndian.ToInt32 (m_input, 0x2C);
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int overlay_size = LittleEndian.ToInt32 (m_input, 0x18);
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var overlay = new byte[overlay_size];
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LzssUnpack (bit_src, data_src, overlay, overlay_size);
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int width = (int)m_info.Width;
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int height = (int)m_info.Height;
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bit_src = 8; // within overlay
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data_src = 8 + LittleEndian.ToInt32 (overlay, 0); // within overlay
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int bit_mask = 0x80;
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int x_blocks = width >> 3;
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if (0 != (width & 7))
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++x_blocks;
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int y_blocks = height >> 3;
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if (0 != (height & 7))
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++y_blocks;
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if (0 == x_blocks)
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return;
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int h = 0;
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int dst_origin = 0;
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while (y_blocks > 0)
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{
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int w = 0;
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for (int x = 0; x < x_blocks; ++x)
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{
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if (0 == bit_mask)
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{
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++bit_src;
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bit_mask = 0x80;
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}
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if (0 == (bit_mask & overlay[bit_src]))
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{
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int dst = 8 * (dst_origin + 4 * x); // within m_output
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int x_count = Math.Min (8, width - w);
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int y_count = Math.Min (8, height - h);
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for (int v30 = y_count; v30 > 0; --v30)
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{
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int count = 4 * x_count;
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Buffer.BlockCopy (overlay, data_src, m_output, dst, count);
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data_src += count;
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dst += m_stride;
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}
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}
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bit_mask >>= 1;
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w += 8;
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}
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dst_origin += m_stride;
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h += 8;
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--y_blocks;
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}
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}
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}
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}
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