//! \file ImageEPA.cs //! \date Fri May 01 03:34:26 2015 //! \brief Pajamas Adventure System 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.IO; using System.Text; using System.Windows.Media; using System.Windows.Media.Imaging; using GameRes.Utility; namespace GameRes.Formats.Pajamas { internal class EpaMetaData : ImageMetaData { public int Mode; public int ColorType; } [Export(typeof(ImageFormat))] public class EpaFormat : ImageFormat { public override string Tag { get { return "EPA"; } } public override string Description { get { return "Pajamas Adventure System image"; } } public override uint Signature { get { return 0x01015045u; } } // 'EP' public EpaFormat () { Signatures = new uint[] { 0x01015045u, 0x02015045u }; } public override void Write (Stream file, ImageData image) { throw new NotImplementedException ("EpaFormat.Write not implemented"); } public override ImageMetaData ReadMetaData (Stream stream) { using (var header = new ArcView.Reader (stream)) { var info = new EpaMetaData(); info.Mode = header.ReadInt32() >> 24; info.ColorType = header.ReadInt32() & 0xff; switch (info.ColorType) { case 0: info.BPP = 8; break; case 1: info.BPP = 24; break; case 2: info.BPP = 32; break; case 3: info.BPP = 15; break; case 4: info.BPP = 8; break; default: return null; } info.Width = header.ReadUInt32(); info.Height = header.ReadUInt32(); if (2 == info.Mode) { info.OffsetX = header.ReadInt32(); info.OffsetY = header.ReadInt32(); } return info; } } public override ImageData Read (Stream stream, ImageMetaData info) { var meta = info as EpaMetaData; if (null == meta) throw new ArgumentException ("EpaFormat.Read should be supplied with EpaMetaData", "info"); stream.Position = 2 == meta.Mode ? 0x18 : 0x10; var reader = new Reader (stream, meta); reader.Unpack(); return ImageData.Create (meta, reader.Format, reader.Palette, reader.Data); } internal class Reader { private Stream m_input; private int m_width; private int m_height; private int m_pixel_size; private byte[] m_output; public PixelFormat Format { get; private set; } public BitmapPalette Palette { get; private set; } public byte[] Data { get { return m_output; } } public Reader (Stream stream, EpaMetaData info) { m_input = stream; switch (info.ColorType) { case 0: m_pixel_size = 1; Format = PixelFormats.Indexed8; break; case 1: m_pixel_size = 3; Format = PixelFormats.Bgr24; break; case 2: m_pixel_size = 4; Format = PixelFormats.Bgra32; break; case 3: m_pixel_size = 2; Format = PixelFormats.Bgr555; break; case 4: m_pixel_size = 1; Format = PixelFormats.Indexed8; break; default: throw new NotSupportedException ("Not supported EPA color depth"); } m_width = (int)info.Width; m_height = (int)info.Height; m_output = new byte[info.Width*info.Height*m_pixel_size]; if (8 == info.BPP) ReadPalette(); } private void ReadPalette () { var palette_data = new byte[0x300]; if (palette_data.Length != m_input.Read (palette_data, 0, palette_data.Length)) throw new InvalidFormatException(); var palette = new Color[0x100]; for (int i = 0; i < palette.Length; ++i) { palette[i] = Color.FromRgb (palette_data[i*3+2], palette_data[i*3+1], palette_data[i*3]); } Palette = new BitmapPalette (palette); } public void Unpack () { int dst = 0; var offset_table = new int[16]; offset_table[0] = 0; offset_table[1] = 1; offset_table[2] = m_width; offset_table[3] = m_width + 1; offset_table[4] = 2; offset_table[5] = m_width - 1; offset_table[6] = m_width * 2; offset_table[7] = 3; offset_table[8] = (m_width + 1) * 2; offset_table[9] = m_width + 2; offset_table[10] = m_width * 2 + 1; offset_table[11] = m_width * 2 - 1; offset_table[12] = (m_width - 1) * 2; offset_table[13] = m_width - 2; offset_table[14] = m_width * 3; offset_table[15] = 4; while (dst < m_output.Length) { int flag = m_input.ReadByte(); if (-1 == flag) throw new InvalidFormatException ("Unexpected end of file"); if (0 == (flag & 0xf0)) { int count = flag; if (dst + count > m_output.Length) count = m_output.Length - dst; if (count != m_input.Read (m_output, dst, count)) throw new InvalidFormatException ("Unexpected end of file"); dst += count; } else { int count; if (0 != (flag & 8)) { count = m_input.ReadByte(); if (-1 == count) throw new InvalidFormatException ("Unexpected end of file"); count += (flag & 7) << 8; } else count = flag & 7; if (dst + count > m_output.Length) break; Binary.CopyOverlapped (m_output, dst-offset_table[flag >> 4], dst, count); dst += count; } } if (m_pixel_size > 1) { var bitmap = new byte[m_output.Length]; int stride = m_width * m_pixel_size; int i = 0; for (int p = 0; p < m_pixel_size; ++p) { for (int y = 0; y < m_height; ++y) { int pixel = y * stride + p; for (int x = 0; x < m_width; ++x) { bitmap[pixel] = m_output[i++]; pixel += m_pixel_size; } } } m_output = bitmap; } } } } }