//! \file ImageCBF.cs //! \date 2018 Mar 29 //! \brief Abel image format. // // Copyright (C) 2018 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.ComponentModel.Composition; using System.IO; using System.Windows.Media; using GameRes.Compression; using GameRes.Utility; namespace GameRes.Formats.Abel { internal class CbfMetaData : ImageMetaData { public int Compression; } [Export(typeof(ImageFormat))] public class CbfFormat : ImageFormat { public override string Tag { get { return "CBF"; } } public override string Description { get { return "Abel image format"; } } public override uint Signature { get { return 0x31464243; } } // 'CBF1' public CbfFormat () { Signatures = new uint[] { 0x30464243, 0x31464243, 0x32464243, 0x33464243 }; } public override ImageMetaData ReadMetaData (IBinaryStream file) { var header = file.ReadHeader (0x18); if (header.ToInt32 (0x10) != 1) return null; int compression = header[3] - '0'; if (compression < 0 || compression > 3) return null; return new CbfMetaData { Width = header.ToUInt32 (4), Height = header.ToUInt32 (8), BPP = header.ToInt32 (12), Compression = compression, }; } public override ImageData Read (IBinaryStream file, ImageMetaData info) { var reader = new CbfReader (file, (CbfMetaData)info); var pixels = reader.Unpack(); var alp_name = Path.ChangeExtension (file.Name, "alp"); if (VFS.FileExists (alp_name)) { try { using (var alp = VFS.OpenBinaryStream (alp_name)) return ReadAlpha (alp, info, pixels); } catch { /* ignore mask read errors */ } } return ImageData.Create (info, PixelFormats.Bgr24, null, pixels); } ImageData ReadAlpha (IBinaryStream alp, ImageMetaData info, byte[] image) { var header = alp.ReadHeader (0x10); if (!header.AsciiEqual ("ALP1")) throw new InvalidFormatException(); int unpacked_size = header.ToInt32 (8); var alpha = new byte[unpacked_size]; int dst = 0; while (dst < alpha.Length) { byte a = alp.ReadUInt8(); int count = alp.ReadUInt8(); for (int i = 0; i < count; ++i) alpha[dst++] = a; } int dst_stride = (int)info.Width * 4; var pixels = new byte[dst_stride * (int)info.Height]; int a_src = 0; int src = 0; for (dst = 0; dst < pixels.Length; dst += 4) { pixels[dst ] = image[src++]; pixels[dst+1] = image[src++]; pixels[dst+2] = image[src++]; pixels[dst+3] = alpha[a_src++]; } return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_stride); } public override void Write (Stream file, ImageData image) { throw new System.NotImplementedException ("CbfFormat.Write not implemented"); } } internal class CbfReader { IBinaryStream m_input; byte[] m_output; int m_width; int m_height; int m_stride; int m_compression; public byte[] Data { get { return m_output; } } public CbfReader (IBinaryStream input, CbfMetaData info) { m_input = input; m_width = (int)info.Width; m_height = (int)info.Height; m_stride = 3 * m_width; m_output = new byte[m_stride * m_height]; m_compression = info.Compression; } public byte[] Unpack () { switch (m_compression) { case 0: UnpackV0(); break; case 1: UnpackV1(); break; case 2: UnpackV2(); break; case 3: UnpackV3(); break; default: throw new NotImplementedException (string.Format ("CBF compression {0} not implemented.", m_compression)); } return m_output; } void UnpackV0 () { m_input.Position = 0x18; m_input.Read (m_output, 0, m_output.Length); } void UnpackV1 () { m_input.Position = 0x18; using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true)) lzss.Read (m_output, 0, m_output.Length); for (int i = 3; i < m_output.Length; ++i) m_output[i] += m_output[i-3]; var pixels = new byte[m_output.Length]; int src = 0; var z_order = GetZigzagBlock(); for (int y = 0; y < m_height; y += 8) for (int x = 0; x < m_stride; x += 24) { int dst = x + y * m_stride; for (int i = 0; i < 64; ++i) { int pos = z_order[i]; pixels[dst + pos++] = m_output[src++]; pixels[dst + pos++] = m_output[src++]; pixels[dst + pos++] = m_output[src++]; } } m_output = pixels; } void UnpackV2 () { m_input.Position = 0x18; ReadRle (m_input.AsStream); } void UnpackV3 () { m_input.Position = 0x1C; using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true)) ReadRle (lzss); } void ReadRle (Stream input) { int dst = 0; while (dst < m_output.Length) { if (3 != input.Read (m_output, dst, 3)) break; int count = input.ReadByte(); if (count > 0) { count *= 3; Binary.CopyOverlapped (m_output, dst, dst+3, count-3); dst += count; } } } int[] GetZigzagBlock () { var order = new int[64]; for (int i = 0; i < 64; ++i) { order[i] = (ZigzagOrder[i] & 7) * 3 + (ZigzagOrder[i] >> 3) * m_stride; } return order; } readonly static byte[] ZigzagOrder = { 0x00, 0x01, 0x08, 0x10, 0x09, 0x02, 0x03, 0x0A, 0x11, 0x18, 0x20, 0x19, 0x12, 0x0B, 0x04, 0x05, 0x0C, 0x13, 0x1A, 0x21, 0x28, 0x30, 0x29, 0x22, 0x1B, 0x14, 0x0D, 0x06, 0x07, 0x0E, 0x15, 0x1C, 0x23, 0x2A, 0x31, 0x38, 0x39, 0x32, 0x2B, 0x24, 0x1D, 0x16, 0x0F, 0x17, 0x1E, 0x25, 0x2C, 0x33, 0x3A, 0x3B, 0x34, 0x2D, 0x26, 0x1F, 0x27, 0x2E, 0x35, 0x3C, 0x3D, 0x36, 0x2F, 0x37, 0x3E, 0x3F, }; } }