mirror of
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239 lines
9.3 KiB
C#
239 lines
9.3 KiB
C#
//! \file ImageEPA.cs
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//! \date Fri May 01 03:34:26 2015
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//! \brief Pajamas Adventure System 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 System;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Text;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats.Pajamas
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{
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internal class EpaMetaData : ImageMetaData
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{
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public int Mode;
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public int ColorType;
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}
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[Export(typeof(ImageFormat))]
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public class EpaFormat : ImageFormat
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{
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public override string Tag { get { return "EPA"; } }
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public override string Description { get { return "Pajamas Adventure System image"; } }
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public override uint Signature { get { return 0x01015045u; } } // 'EP'
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public EpaFormat ()
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{
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Signatures = new uint[] { 0x01015045u, 0x02015045u };
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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 NotImplementedException ("EpaFormat.Write not implemented");
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}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (16);
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var info = new EpaMetaData {
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Width = header.ToUInt32 (8),
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Height = header.ToUInt32 (12),
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Mode = header[3],
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ColorType = header[4],
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};
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switch (info.ColorType)
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{
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case 0: info.BPP = 8; break;
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case 1: info.BPP = 24; break;
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case 2: info.BPP = 32; break;
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case 3: info.BPP = 16; break;
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case 4: info.BPP = 8; break;
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default: return null;
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}
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if (2 == info.Mode)
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{
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info.OffsetX = file.ReadInt32();
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info.OffsetY = file.ReadInt32();
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}
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return info;
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var reader = new Reader (file, (EpaMetaData)info);
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reader.Unpack();
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return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
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}
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internal class Reader
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{
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private IBinaryStream m_input;
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private int m_start_pos;
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private int m_width;
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private int m_height;
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private int m_pixel_size;
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private byte[] m_output;
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private bool m_has_alpha;
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public PixelFormat Format { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public byte[] Data { get { return m_output; } }
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public Reader (IBinaryStream stream, EpaMetaData info)
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{
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m_input = stream;
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switch (info.ColorType)
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{
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case 0: m_pixel_size = 1; Format = PixelFormats.Indexed8; break;
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case 1: m_pixel_size = 3; Format = PixelFormats.Bgr24; break;
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case 2: m_pixel_size = 4; Format = PixelFormats.Bgra32; break;
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case 3: m_pixel_size = 2; Format = PixelFormats.Bgr565; break;
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case 4: m_pixel_size = 1; Format = PixelFormats.Bgra32; m_has_alpha = true; break;
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default: throw new NotSupportedException ("Not supported EPA color depth");
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}
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_output = new byte[info.Width*info.Height*m_pixel_size];
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m_start_pos = 2 == info.Mode ? 0x18 : 0x10;
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}
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int[] m_offset_table = new int[16];
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public void Unpack ()
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{
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m_input.Position = m_start_pos;
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if (1 == m_pixel_size)
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Palette = ImageFormat.ReadPalette (m_input.AsStream, 0x100, PaletteFormat.Bgr);
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m_offset_table[0] = 0;
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m_offset_table[1] = 1;
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m_offset_table[2] = m_width;
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m_offset_table[3] = m_width + 1;
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m_offset_table[4] = 2;
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m_offset_table[5] = m_width - 1;
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m_offset_table[6] = m_width * 2;
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m_offset_table[7] = 3;
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m_offset_table[8] = (m_width + 1) * 2;
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m_offset_table[9] = m_width + 2;
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m_offset_table[10] = m_width * 2 + 1;
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m_offset_table[11] = m_width * 2 - 1;
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m_offset_table[12] = (m_width - 1) * 2;
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m_offset_table[13] = m_width - 2;
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m_offset_table[14] = m_width * 3;
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m_offset_table[15] = 4;
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UnpackChannel (m_output);
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if (m_has_alpha)
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{
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var alpha = new byte[m_output.Length];
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UnpackChannel (alpha);
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var bitmap = new byte[m_width * m_height * 4];
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int dst = 0;
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for (int src = 0; src < m_output.Length; ++src)
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{
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var color = Palette.Colors[m_output[src]];
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bitmap[dst++] = color.B;
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bitmap[dst++] = color.G;
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bitmap[dst++] = color.R;
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bitmap[dst++] = alpha[src];
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}
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m_output = bitmap;
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}
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if (m_pixel_size > 1)
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{
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var bitmap = new byte[m_output.Length];
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int src = 0;
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if (m_pixel_size > 2)
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{
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int stride = m_width * m_pixel_size;
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for (int p = 0; p < m_pixel_size; ++p)
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{
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for (int y = 0; y < m_height; ++y)
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{
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int dst = y * stride + p;
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for (int x = 0; x < m_width; ++x)
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{
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bitmap[dst] = m_output[src++];
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dst += m_pixel_size;
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}
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}
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}
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}
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else
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{
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int dst = 0;
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int channel_size = m_width * m_height;
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for (int y = 0; y < m_height; ++y)
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{
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for (int x = 0; x < m_width; ++x)
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{
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byte c1 = m_output[src + x];
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byte c2 = m_output[src + x + channel_size];
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bitmap[dst++] = (byte)(c2 & 3 | (c1 & 7 | (c2 & 0xFC) << 1) << 2);
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bitmap[dst++] = (byte)(c1 & 0xC0 | (c2 & 0xE3 | (c1 >> 1) & 0x1C) >> 2);
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}
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src += m_width;
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}
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}
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m_output = bitmap;
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}
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}
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void UnpackChannel (byte[] output)
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{
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int dst = 0;
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while (dst < output.Length)
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{
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int count;
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int flag = m_input.ReadUInt8();
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if (0 == (flag & 0xF0))
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{
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count = flag;
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if (dst + count > output.Length)
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count = output.Length - dst;
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if (count != m_input.Read (output, dst, count))
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throw new InvalidFormatException ("Unexpected end of file");
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}
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else
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{
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if (0 != (flag & 8))
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{
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count = m_input.ReadUInt8();
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count += (flag & 7) << 8;
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}
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else
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count = flag & 7;
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if (dst + count > output.Length)
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break;
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Binary.CopyOverlapped (output, dst-m_offset_table[flag >> 4], dst, count);
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}
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dst += count;
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}
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}
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}
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}
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}
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