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