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372 lines
13 KiB
C#
372 lines
13 KiB
C#
//! \file ImageBITD.cs
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//! \date Fri Jun 26 07:45:01 2015
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//! \brief Selen 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.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Linq;
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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.Macromedia
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{
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[Export(typeof(ImageFormat))]
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public class BitdFormat : ImageFormat
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{
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public override string Tag { get { return "BITD"; } }
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public override string Description { get { return "Selen RLE-compressed bitmap"; } }
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public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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if (stream.Length > 0xffffff)
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return null;
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var scanner = new BitdScanner (stream.AsStream);
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return scanner.GetInfo();
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}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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var reader = new BitdReader (stream.AsStream, info);
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Data);
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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 ("BitdFormat.Write not implemented");
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}
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}
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internal class BitdScanner
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{
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Stream m_input;
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protected Stream Input { get { return m_input; } }
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public BitdScanner (Stream input)
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{
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m_input = input;
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}
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const int MaxScanLine = 2048;
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public ImageMetaData GetInfo ()
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{
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int total = 0;
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var scan_lines = new Dictionary<int, int>();
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var key_lines = new List<int>();
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for (;;)
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{
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int b = m_input.ReadByte();
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if (-1 == b)
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break;
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int count = b;
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if (b > 0x7f)
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count = (byte)-(sbyte)b;
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++count;
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if (count > 0x7f)
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return null;
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if (b > 0x7f)
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{
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if (-1 == m_input.ReadByte())
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return null;
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}
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else
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m_input.Seek (count, SeekOrigin.Current);
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key_lines.Clear();
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key_lines.AddRange (scan_lines.Keys);
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foreach (var line in key_lines)
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{
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int width = scan_lines[line];
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if (width < count)
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scan_lines.Remove (line);
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else if (width == count)
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scan_lines[line] = line;
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else
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scan_lines[line] = width - count;
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}
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total += count;
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if (total <= MaxScanLine && total >= 8)
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scan_lines[total] = total;
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if (total > MaxScanLine && !scan_lines.Any())
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return null;
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}
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int rem;
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total = Math.DivRem (total, 4, out rem);
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if (rem != 0)
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return null;
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var valid_lines = from line in scan_lines where line.Key == line.Value
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orderby line.Key
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select line.Key;
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bool is_eof = -1 == m_input.ReadByte();
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foreach (var width in valid_lines)
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{
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int height = Math.DivRem (total, width, out rem);
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if (0 == rem)
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{
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return new ImageMetaData
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{
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Width = (uint)width,
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Height = (uint)height,
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BPP = 32,
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};
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}
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}
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return null;
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}
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}
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internal class BitdReader : BitdScanner
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{
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byte[] m_output;
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int m_width;
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int m_height;
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public byte[] Data { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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public BitdReader (Stream input, ImageMetaData info) : base (input)
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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[m_width * m_height * 4];
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Format = PixelFormats.Bgra32;
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}
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public void Unpack ()
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{
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int stride = m_width * 4;
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var scan_line = new byte[stride];
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for (int line = 0; line < m_output.Length; line += stride)
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{
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int dst = 0;
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while (dst < stride)
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{
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int b = Input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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int count = b;
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if (b > 0x7f)
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count = (byte)-(sbyte)b;
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++count;
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if (dst + count > stride)
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throw new InvalidFormatException();
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if (b > 0x7f)
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{
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b = Input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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for (int i = 0; i < count; ++i)
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scan_line[dst++] = (byte)b;
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}
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else
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{
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Input.Read (scan_line, dst, count);
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dst += count;
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}
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}
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dst = line;
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for (int x = 0; x < m_width; ++x)
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{
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m_output[dst++] = scan_line[x+m_width*3];
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m_output[dst++] = scan_line[x+m_width*2];
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m_output[dst++] = scan_line[x+m_width];
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m_output[dst++] = scan_line[x];
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}
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}
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}
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}
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internal class BitdDecoder : IImageDecoder
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{
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Stream m_input;
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byte[] m_output;
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int m_width;
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int m_height;
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int m_stride;
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ImageMetaData m_info;
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ImageData m_image;
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BitmapPalette m_palette;
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public Stream Source => m_input;
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public ImageFormat SourceFormat => null;
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public ImageMetaData Info => m_info;
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public ImageData Image => m_image ?? (m_image = GetImageData());
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public PixelFormat Format { get; private set; }
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public byte[] AlphaChannel { get; set; }
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public BitdDecoder (Stream input, ImageMetaData info, BitmapPalette palette)
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{
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m_input = input;
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m_info = info;
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m_width = info.iWidth;
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m_height = info.iHeight;
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m_stride = (m_width * m_info.BPP + 7) / 8;
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m_stride = (m_stride + 1) & ~1;
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m_output = new byte[m_stride * m_height];
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Format = info.BPP == 2 ? PixelFormats.Indexed2
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: info.BPP == 4 ? PixelFormats.Indexed4
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: info.BPP == 8 ? PixelFormats.Indexed8
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: info.BPP == 16 ? PixelFormats.Bgr555
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: PixelFormats.Bgr32;
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m_palette = palette;
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}
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protected ImageData GetImageData ()
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{
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m_input.Position = 0;
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if (Info.BPP <= 8)
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Unpack8bpp();
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else
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UnpackChannels (Info.BPP / 8);
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if (AlphaChannel != null)
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{
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if (Info.BPP != 32)
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{
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BitmapSource bitmap = BitmapSource.Create (Info.iWidth, Info.iHeight, ImageData.DefaultDpiX, ImageData.DefaultDpiY, Format, m_palette, m_output, m_stride);
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bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgr32, null, 0);
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m_stride = bitmap.PixelWidth * 4;
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m_output = new byte[bitmap.PixelHeight * m_stride];
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bitmap.CopyPixels (m_output, m_stride, 0);
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}
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ApplyAlphaChannel (AlphaChannel);
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Format = PixelFormats.Bgra32;
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}
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return ImageData.Create (m_info, Format, m_palette, m_output, m_stride);
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}
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void ApplyAlphaChannel (byte[] alpha)
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{
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int alpha_stride = (m_width + 1) & ~1;
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int src = 0;
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int pdst = 3;
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for (int y = 0; y < m_height; ++y)
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{
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int dst = pdst;
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for (int x = 0; x < m_width; ++x)
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{
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m_output[dst] = alpha[src+x];
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dst += 4;
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}
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src += alpha_stride;
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pdst += m_stride;
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}
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}
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public byte[] Unpack8bpp ()
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{
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for (int line = 0; line < m_output.Length; line += m_stride)
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{
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int x = 0;
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while (x < m_stride)
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{
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int b = m_input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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int count = b;
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if (b > 0x7f)
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count = (byte)-(sbyte)b;
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++count;
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if (x + count > m_stride)
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throw new InvalidFormatException();
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if (b > 0x7f)
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{
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b = m_input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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for (int i = 0; i < count; ++i)
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m_output[line + x++] = (byte)b;
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}
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else
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{
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m_input.Read (m_output, line + x, count);
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x += count;
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}
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}
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}
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return m_output;
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}
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public void UnpackChannels (int channels)
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{
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var scan_line = new byte[m_stride];
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for (int line = 0; line < m_output.Length; line += m_stride)
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{
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int x = 0;
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while (x < m_stride)
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{
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int b = m_input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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int count = b;
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if (b > 0x7f)
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count = (byte)-(sbyte)b;
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++count;
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if (x + count > m_stride)
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throw new InvalidFormatException();
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if (b > 0x7f)
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{
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b = m_input.ReadByte();
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if (-1 == b)
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throw new InvalidFormatException ("Unexpected end of file");
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for (int i = 0; i < count; ++i)
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scan_line[x++] = (byte)b;
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}
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else
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{
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m_input.Read (scan_line, x, count);
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x += count;
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}
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}
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int dst = line;
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for (int i = 0; i < m_width; ++i)
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{
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for (int src = m_width * (channels - 1); src >= 0; src -= m_width)
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m_output[dst++] = scan_line[i + src];
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}
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}
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}
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#region IDisposable Members
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_input.Dispose();
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m_disposed = true;
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}
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GC.SuppressFinalize (this);
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}
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#endregion
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}
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}
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