//! \file ImageERP.cs //! \date 2019 Jan 04 //! \brief Studio B-Room image format. // // Copyright (C) 2019 by morkt // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // using System; using System.Collections.Generic; using System.ComponentModel.Composition; using System.IO; using System.Windows.Media; using System.Windows.Media.Imaging; using GameRes.Utility; // [030502][Studio B-Room] Wataridori ni Yadorigi o // [040604][Studio B-Room] Dice-ki! ~Koi wa Un Makase~ namespace GameRes.Formats.BRoom { internal class ErpMetaData : ImageMetaData { public int Id; public int Method; public byte KeyIndex; } [Export(typeof(ImageFormat))] public class ErpFormat : ImageFormat { public override string Tag { get { return "ERP"; } } public override string Description { get { return "Studio B-Room image format"; } } public override uint Signature { get { return 0; } } static readonly byte[] HeaderKey = { 0x7D, 0x45, 0x59, 0x26, 0x8D, 0x45, 0x98, 0x26, 0x69, 0x68, 0x57, 0x52, 0x76, 0x85, 0x12, 0x18, 0x62, 0x47, 0x7F, 0x84, }; public override ImageMetaData ReadMetaData (IBinaryStream file) { if ((file.Signature & 0xFFFFFF00) != 0x26594500) return null; var header = file.ReadHeader (0x14).ToArray(); int idx = header[0] ^ HeaderKey[0]; if (idx >= 31) return null; for (int i = 4; i < 0x14; ++i) header[i] ^= HeaderKey[i]; int method = header.ToInt32 (16) ^ idx; if (method < 0 || method > 12) return null; int key_index = GuessKeyIndex (header, idx); if (key_index < 0) return null; int bpp = header.ToInt32 (4) ^ DefaultKey[0, key_index, idx]; if (bpp != 8 && bpp != 24) return null; return new ErpMetaData { Width = (header.ToUInt32 (8) ^ DefaultKey[1, key_index, idx]) * 4, Height = (header.ToUInt32 (12) ^ DefaultKey[2, key_index, idx]) * 4, BPP = bpp, Id = idx, Method = method, KeyIndex = (byte)key_index, }; } int? LastKeyIndex = null; int GuessKeyIndex (byte[] header, int idx) { if (LastKeyIndex != null) return LastKeyIndex.Value; for (int key_index = 2; key_index >= 0; --key_index) { int bpp = header[4] ^ DefaultKey[0, key_index, idx]; if (bpp == 8 || bpp == 24) { if (idx != 9) LastKeyIndex = key_index; return key_index; } } LastKeyIndex = null; return -1; } public override ImageData Read (IBinaryStream file, ImageMetaData info) { var reader = new ErpReader (file, (ErpMetaData)info); return reader.Unpack(); } public override void Write (Stream file, ImageData image) { throw new System.NotImplementedException ("ErpFormat.Write not implemented"); } static readonly byte[,,] DefaultKey = new byte[3,3,31] { { { 0x86, 0xBD, 0xAD, 0x4B, 0xBC, 0x1D, 0xAA, 0x4C, 0x23, 0xAB, 0x16, 0x8C, 0xE2, 0x29, 0x7F, 0xE1, 0xF3, 0xAC, 0x9A, 0x09, 0x30, 0xD4, 0x7D, 0x7B, 0x32, 0x70, 0x73, 0x81, 0x5B, 0x3C, 0x47 }, { 0x2E, 0x90, 0x20, 0x6C, 0x59, 0xB2, 0x83, 0x71, 0x12, 0x13, 0x87, 0xC4, 0xF4, 0x3E, 0xD9, 0x93, 0x0B, 0xDC, 0xB3, 0x70, 0xCC, 0x53, 0xDA, 0x96, 0xA6, 0xA2, 0xB8, 0x43, 0x07, 0xD3, 0x68 }, { 0x36, 0x89, 0x53, 0xE9, 0x7E, 0x07, 0x3A, 0x80, 0x18, 0x13, 0xD5, 0xD2, 0x70, 0x2B, 0xCB, 0xC7, 0xA3, 0xF5, 0xE4, 0x8E, 0x29, 0x48, 0xDC, 0xAE, 0x0E, 0xBB, 0xC9, 0xA8, 0x3C, 0xA7, 0x50 } }, { { 0x33, 0x2A, 0x40, 0xB4, 0x50, 0xDA, 0x96, 0xE7, 0x8B, 0x54, 0x06, 0x85, 0x1B, 0xD7, 0x79, 0x0A, 0x83, 0xB9, 0x9C, 0x0D, 0x63, 0x2E, 0x5D, 0x6B, 0xF2, 0x39, 0xEE, 0x55, 0xCE, 0x4D, 0xA0 }, { 0x54, 0xD5, 0x18, 0x74, 0x72, 0x79, 0x37, 0x98, 0xBA, 0x4F, 0x49, 0x9D, 0xB7, 0x40, 0xE7, 0x76, 0xC1, 0x1C, 0x91, 0x3B, 0x2C, 0x1D, 0x2B, 0x5D, 0x6F, 0x1E, 0x8E, 0x82, 0xC6, 0xBC, 0x33 }, { 0x28, 0xB1, 0x85, 0xF4, 0xFA, 0x9C, 0xEF, 0x73, 0x34, 0x00, 0x22, 0x76, 0x78, 0x45, 0x4A, 0xD8, 0x5D, 0x0F, 0x3F, 0xB9, 0xA9, 0xA0, 0x46, 0xCD, 0x93, 0x91, 0x66, 0x2C, 0xE3, 0x26, 0x10 } }, { { 0xA7, 0x35, 0xBB, 0x42, 0x82, 0x60, 0x71, 0x26, 0xB1, 0x69, 0xB6, 0x2D, 0x0F, 0x6D, 0xA3, 0xB0, 0xCA, 0x10, 0x4F, 0xDC, 0x00, 0xA2, 0xA6, 0x04, 0x9B, 0x7E, 0xC6, 0xFF, 0xFE, 0xFA, 0x7C }, { 0x95, 0x34, 0x0D, 0xA4, 0x3C, 0x30, 0x6E, 0xBB, 0xD1, 0x35, 0xF5, 0x3A, 0xA9, 0xBF, 0x8A, 0x3D, 0x31, 0xFA, 0x19, 0x45, 0x6D, 0x7E, 0x24, 0x9B, 0xAF, 0x1B, 0x65, 0xB9, 0x02, 0xFF, 0x0C }, { 0xD0, 0x74, 0x77, 0x1E, 0x54, 0xBE, 0xD1, 0x44, 0xE0, 0x9D, 0xFE, 0x40, 0xC8, 0x31, 0x0B, 0xB2, 0x5E, 0x92, 0xF1, 0x0A, 0x84, 0x64, 0x35, 0xF2, 0x9B, 0x19, 0x9E, 0x83, 0x0C, 0x14, 0x7A } } }; } internal class ErpReader { IBinaryStream m_input; ErpMetaData m_info; byte[] m_output; public PixelFormat Format { get; private set; } public BitmapPalette Palette { get; private set; } public ErpReader (IBinaryStream input, ErpMetaData info) { m_input = input; m_info = info; int stride = info.iWidth * info.BPP / 8; m_output = new byte[stride * info.iHeight]; if (8 == m_info.BPP) Format = PixelFormats.Indexed8; else if (24 == m_info.BPP) Format = PixelFormats.Bgr24; else throw new InvalidFormatException(); } public ImageData Unpack () { m_input.Position = 0x14; if (8 == m_info.BPP) { Palette = ImageFormat.ReadPalette (m_input.AsStream); Unpack8bpp(); } else if (0 == m_info.Method) UnpackV0(); else if (m_info.Method < 7) UnpackV1(); else UnpackV7(); return ImageData.Create (m_info, Format, Palette, m_output); } void Unpack8bpp () { int dst = 0; while (dst < m_output.Length) { int px = m_input.ReadByte(); int count = m_input.ReadByte(); if (count < 0) break; count ^= 9; if (count > 0) { byte v = (byte)(px ^ 13); while (count --> 0) m_output[dst++] = v; } } } void UnpackV0 () { var count_key = new ErpKey (m_info.Id ^ 0x68, DefaultKey[6, m_info.KeyIndex, m_info.Id]); var r_key = new ErpKey (DefaultKey[0, m_info.KeyIndex, m_info.Id], DefaultKey[3, m_info.KeyIndex, m_info.Id]); var g_key = new ErpKey (DefaultKey[1, m_info.KeyIndex, m_info.Id], DefaultKey[4, m_info.KeyIndex, m_info.Id]); var b_key = new ErpKey (DefaultKey[2, m_info.KeyIndex, m_info.Id], DefaultKey[5, m_info.KeyIndex, m_info.Id]); var rgb = new byte[3]; int dst = 0; while (dst < m_output.Length) { m_input.Read (rgb, 0, 3); int count = m_input.ReadByte(); if (count < 0) break; count ^= count_key.Value ^ 0xE9; if (count > 0) { m_output[dst++] = (byte)(rgb[0] ^ b_key.Value); m_output[dst++] = (byte)(rgb[1] ^ g_key.Value); m_output[dst++] = (byte)(rgb[2] ^ r_key.Value); count = Math.Min ((count - 1) * 3, m_output.Length - dst); if (count > 0) { Binary.CopyOverlapped (m_output, dst-3, dst, count); dst += count; } } r_key.Increment(); g_key.Increment(); b_key.Increment(); count_key.Increment(); } } static readonly byte[,] ChannelOrder = new byte[6,3] { { 0, 1, 2 }, { 0, 2, 1 }, { 1, 0, 2 }, { 1, 2, 0 }, { 2, 0, 1 }, { 2, 1, 0 } }; void UnpackV1 () { var count_list = new List<int>(); var count_key = new ErpKey (m_info.Id ^ 0x68, DefaultKey[6, m_info.KeyIndex, m_info.Id]); int count; while ((count = m_input.ReadByte()) >= 0) { count ^= count_key.Value ^ 0xE9; if (0 == count) break; count_list.Add (count); count_key.Increment(); } int order = m_info.Method - 1; for (int i = 0; i < 3; ++i) { int channel = ChannelOrder[order, i]; var pixel_key = new ErpKey (DefaultKey[channel, m_info.KeyIndex, m_info.Id], DefaultKey[channel+3, m_info.KeyIndex, m_info.Id]); int dst = 2-channel; for (int j = 0; j < count_list.Count; ++j) { count = count_list[j]; int px = m_input.ReadByte(); byte v = (byte)(px ^ pixel_key.Value); while (count --> 0) { m_output[dst] = v; dst += 3; } pixel_key.Increment(); } } } void UnpackV7 () { int order = m_info.Method - 7; var channels = new byte[3][]; for (int i = 0; i < 3; ++i) { int channel = ChannelOrder[order, i]; channels[channel] = UnpackChannel (channel); } int src = 0; int dst = 0; while (dst < m_output.Length) { m_output[dst++] = channels[2][src]; m_output[dst++] = channels[1][src]; m_output[dst++] = channels[0][src]; ++src; } } byte[] UnpackChannel (int channel) { var output = new byte[m_output.Length / 3]; var count_key = new ErpKey (m_info.Id ^ 0x68, DefaultKey[6, m_info.KeyIndex, m_info.Id]); var pixel_key = new ErpKey (DefaultKey[channel, m_info.KeyIndex, m_info.Id], DefaultKey[channel+3, m_info.KeyIndex, m_info.Id]); int dst = 0; for (;;) { int px = m_input.ReadByte(); int count = m_input.ReadByte(); if (count < 0) break; count ^= count_key.Value ^ 0xE9; if (0 == count) break; count = Math.Min (count, output.Length - dst); byte v = (byte)(px ^ pixel_key.Value); while (count --> 0) output[dst++] = v; count_key.Increment(); pixel_key.Increment(); } return output; } static readonly byte[,,] DefaultKey = new byte[7,3,31] { { { 0x5C, 0xEC, 0xC5, 0xCB, 0x76, 0xEF, 0x08, 0x66, 0xBE, 0x0E, 0x05, 0x9E, 0x1F, 0x8D, 0x11, 0xCD, 0xE5, 0x5F, 0x1A, 0x56, 0xD6, 0x01, 0xA9, 0xA4, 0x44, 0x03, 0x77, 0xB8, 0x0C, 0xF7, 0xF0 }, { 0x85, 0x09, 0xE1, 0x8D, 0x1F, 0x56, 0xD2, 0x4B, 0xCB, 0xC3, 0xEF, 0x10, 0x08, 0xE0, 0x36, 0x6A, 0xAC, 0x57, 0x7C, 0x94, 0xEC, 0x2D, 0xFE, 0xDF, 0x41, 0x8C, 0x5A, 0xC7, 0x77, 0x21, 0xEA }, { 0xC4, 0xAF, 0x4B, 0x98, 0xF3, 0xCF, 0x5B, 0x62, 0x1F, 0x23, 0xE5, 0x32, 0x41, 0x27, 0x69, 0x15, 0x4F, 0xE2, 0x4D, 0x16, 0xB7, 0xF7, 0xF8, 0x21, 0x72, 0x58, 0xEC, 0xD3, 0x8A, 0xFB, 0x8B } }, { { 0x36, 0x02, 0x6F, 0xB5, 0x12, 0x94, 0x31, 0x1E, 0x78, 0xF4, 0x07, 0xFD, 0xED, 0x9F, 0xC2, 0x17, 0xD0, 0x2C, 0x75, 0xAF, 0x2F, 0x65, 0xE4, 0xB3, 0xA5, 0x38, 0xCF, 0x20, 0x14, 0x91, 0x8A }, { 0xF0, 0xAE, 0x9C, 0xF8, 0xC5, 0xAD, 0x73, 0x00, 0x55, 0xCD, 0x0F, 0xE5, 0x38, 0x3F, 0x44, 0x6B, 0x4E, 0x84, 0xBE, 0x39, 0xEE, 0x88, 0xEB, 0xE8, 0xF9, 0xD8, 0xA8, 0xE2, 0xE9, 0x58, 0x15 }, { 0x17, 0x8F, 0x1A, 0xD9, 0x94, 0x71, 0xBD, 0x11, 0x47, 0xAD, 0x39, 0x79, 0xC5, 0xC0, 0xEB, 0x09, 0x6C, 0x52, 0x63, 0x4E, 0x8D, 0xEA, 0x90, 0xD6, 0x49, 0xCC, 0xD7, 0x88, 0x05, 0x9A, 0xB6 } }, { { 0xD9, 0x89, 0xAE, 0xD2, 0x1C, 0x0B, 0x95, 0xC0, 0xDF, 0x43, 0x3F, 0x97, 0x27, 0x46, 0xF1, 0x4A, 0xDD, 0x13, 0xE6, 0x99, 0xD1, 0xDE, 0x49, 0x41, 0xDB, 0x90, 0xE9, 0x8F, 0xC8, 0xC4, 0x15 }, { 0x46, 0xAB, 0xF2, 0x42, 0x9E, 0x8F, 0x7D, 0xFB, 0xCE, 0x01, 0x5C, 0x66, 0x0E, 0xA1, 0x81, 0x47, 0x04, 0x23, 0xD4, 0xD0, 0x11, 0x97, 0xC0, 0x16, 0xFC, 0x8B, 0xA3, 0xD6, 0xF7, 0x06, 0xB0 }, { 0x87, 0xE1, 0xDD, 0x0D, 0xBA, 0x3D, 0x08, 0x6A, 0x8C, 0xB5, 0xD4, 0xE7, 0xE6, 0xED, 0xA6, 0xDF, 0xA5, 0xA4, 0xCA, 0x6E, 0xA1, 0x51, 0xF9, 0xA2, 0x02, 0x9F, 0x7D, 0xCE, 0x12, 0x82, 0xEE } }, { { 0xFD, 0xF8, 0x02, 0x5E, 0x92, 0x13, 0x65, 0x57, 0xAF, 0x12, 0x18, 0x25, 0x90, 0xCB, 0xEC, 0x38, 0x1B, 0x8B, 0xA5, 0xE7, 0x93, 0x87, 0xB3, 0x46, 0xBB, 0x7E, 0xBF, 0xC4, 0x8F, 0xC0, 0xA4 }, { 0xF3, 0x3A, 0x57, 0x61, 0x15, 0xB4, 0x1C, 0xDF, 0x5B, 0x91, 0xD1, 0x99, 0x9F, 0x0B, 0xEE, 0x85, 0x82, 0x63, 0xAF, 0xA2, 0xC4, 0x0C, 0xB1, 0xA1, 0x33, 0xE3, 0xAE, 0x7B, 0xC1, 0x2B, 0xBE }, { 0xAE, 0x6B, 0x6A, 0x28, 0x61, 0x75, 0xC9, 0x58, 0x26, 0x0C, 0x52, 0x30, 0x73, 0xDE, 0x70, 0x95, 0xDC, 0xE6, 0xAD, 0xDB, 0xB5, 0xDD, 0x63, 0xA5, 0xA7, 0x7A, 0xF1, 0xA2, 0x06, 0xE0, 0xA6 } }, { { 0xF4, 0x28, 0x09, 0xD7, 0x89, 0xD0, 0xD5, 0x4B, 0x88, 0xF3, 0x7A, 0x01, 0xCA, 0x45, 0x41, 0x61, 0xB8, 0xF6, 0x60, 0xD3, 0x74, 0x5C, 0x06, 0xE6, 0x55, 0xAE, 0xDC, 0x54, 0xC7, 0x04, 0x1E }, { 0xDC, 0x07, 0xFE, 0x6C, 0xB2, 0xBF, 0x83, 0x19, 0x4E, 0x4F, 0x78, 0x87, 0xEA, 0xC5, 0xB8, 0x30, 0xED, 0x86, 0xDD, 0x24, 0x36, 0xBD, 0x96, 0x49, 0x01, 0x81, 0x22, 0x3B, 0x94, 0xA4, 0xD5 }, { 0x59, 0x36, 0xAF, 0x41, 0x6F, 0xD9, 0x37, 0xEC, 0xAA, 0x50, 0x57, 0xE9, 0x4E, 0xC5, 0x32, 0xB9, 0x3B, 0x21, 0xF3, 0x38, 0x8D, 0xCD, 0xF5, 0x4D, 0xC1, 0x85, 0x39, 0x84, 0x3C, 0x90, 0x78 }, }, { { 0x51, 0x4D, 0x98, 0xB2, 0xA7, 0x4A, 0x4C, 0x3A, 0x80, 0xAD, 0x2C, 0x91, 0x53, 0xD6, 0xBA, 0x77, 0x97, 0xDF, 0xFF, 0xE8, 0x34, 0x82, 0x3B, 0x27, 0x59, 0xD4, 0x5B, 0x4E, 0x6B, 0x58, 0x35 }, { 0x9E, 0x7E, 0x95, 0x5C, 0xE5, 0xFF, 0xA6, 0x73, 0x14, 0x8C, 0x71, 0x34, 0xC7, 0x9D, 0x46, 0x13, 0x29, 0x20, 0xCB, 0xD0, 0xA8, 0x3C, 0xFA, 0x64, 0x59, 0x76, 0xC0, 0xCD, 0xA9, 0xC9, 0x6B }, { 0xC2, 0xE2, 0x64, 0x40, 0x2A, 0xFF, 0x83, 0xBA, 0xD8, 0x47, 0x17, 0x6E, 0x18, 0xE4, 0x23, 0x42, 0xB8, 0x74, 0x5B, 0x54, 0x48, 0x43, 0x77, 0xE3, 0xA1, 0x27, 0x81, 0xAC, 0xC6, 0x1D, 0x01 } }, { { 0x4F, 0x48, 0x9B, 0xEF, 0x63, 0x9E, 0xB0, 0x9F, 0xF5, 0xF0, 0x7C, 0xC6, 0xBD, 0xA3, 0x72, 0x50, 0xED, 0x0F, 0xFE, 0x83, 0x1A, 0xB7, 0xDD, 0x30, 0x33, 0x2A, 0x8A, 0x49, 0x26, 0x56, 0x95 }, { 0x56, 0x38, 0x2D, 0x9C, 0x6D, 0xA5, 0xA3, 0x53, 0x5A, 0xB7, 0x2E, 0x90, 0x37, 0x70, 0x27, 0xB0, 0x32, 0xEF, 0x55, 0x5E, 0xFD, 0x48, 0xC2, 0xE0, 0x18, 0xCE, 0xB3, 0x4B, 0xBB, 0xD6, 0x54 }, { 0xFE, 0xCA, 0x34, 0xF4, 0x4A, 0x03, 0x1E, 0x9F, 0x97, 0xF9, 0x15, 0x53, 0x46, 0x87, 0x99, 0x24, 0x3A, 0x8A, 0xC7, 0x1B, 0x3F, 0x79, 0x31, 0x9A, 0x9B, 0xBE, 0x0E, 0x86, 0x5D, 0x07, 0xD4 } } }; } struct ErpKey { int m_value; byte m_increment; public byte Value { get { return (byte)m_value; } } public ErpKey (int init_value, byte increment) { m_value = init_value; m_increment = increment; } public void Increment () { m_value += m_increment; if (m_value > 0xFF) m_value -= 0xFF; } } }