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382 lines
15 KiB
C#
382 lines
15 KiB
C#
//! \file ImageMAI.cs
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//! \date Sun May 03 10:26:35 2015
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//! \brief MAI image formats implementation.
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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.MAI
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{
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internal class CmpMetaData : ImageMetaData
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{
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public int Colors;
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public bool IsCompressed;
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public uint DataOffset;
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public uint DataLength;
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}
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[Export(typeof(ImageFormat))]
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public class CmpFormat : ImageFormat
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{
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public override string Tag { get { return "CMP/MAI"; } }
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public override string Description { get { return "MAI image format"; } }
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public override uint Signature { get { return 0; } }
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public CmpFormat ()
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{
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Extensions = new string[] { "cmp" };
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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 ("CmpFormat.Write not implemented");
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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if ('C' != stream.ReadByte() || 'M' != stream.ReadByte())
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return null;
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var header = new byte[0x1e];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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if (1 != header[0x0c])
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return null;
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uint size = LittleEndian.ToUInt32 (header, 0);
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if (size != stream.Length)
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return null;
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var info = new CmpMetaData();
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info.Width = LittleEndian.ToUInt16 (header, 4);
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info.Height = LittleEndian.ToUInt16 (header, 6);
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info.Colors = LittleEndian.ToUInt16 (header, 8);
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info.BPP = header[0x0a];
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info.IsCompressed = 0 != header[0x0b];
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info.DataOffset = LittleEndian.ToUInt32 (header, 0x0e);
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info.DataLength = LittleEndian.ToUInt32 (header, 0x12);
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if (info.DataLength > size)
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return null;
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return info;
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as CmpMetaData;
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if (null == meta)
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throw new ArgumentException ("CmpFormat.Read should be supplied with CmpMetaData", "info");
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var reader = new Reader (stream, meta);
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reader.Unpack();
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var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height,
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ImageData.DefaultDpiX, ImageData.DefaultDpiY,
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reader.Format, reader.Palette, reader.Data, reader.Stride);
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var flipped = new TransformedBitmap (bitmap, new ScaleTransform { ScaleY = -1 });
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flipped.Freeze();
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return new ImageData (flipped, info);
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}
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internal class Reader
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{
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private Stream m_input;
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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 bool m_compressed;
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private int m_data_length;
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private byte[] m_pixels;
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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_pixels; } }
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public int Stride { get { return m_width * m_pixel_size; } }
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public Reader (Stream stream, CmpMetaData info)
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{
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m_input = stream;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_pixel_size = info.BPP/8;
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m_compressed = info.IsCompressed;
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m_data_length = (int)info.DataLength;
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switch (m_pixel_size)
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{
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case 1: Format = PixelFormats.Indexed8; break;
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case 3: Format = PixelFormats.Bgr24; break;
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case 4: Format = PixelFormats.Bgr32; break;
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default: throw new InvalidFormatException ("Invalid color depth");
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}
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m_input.Position = info.DataOffset;
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if (info.Colors > 0)
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Palette = RleDecoder.ReadPalette (m_input, info.Colors, 3);
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int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
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m_pixels = new byte[size];
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}
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public void Unpack ()
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{
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if (m_compressed)
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RleDecoder.Unpack (m_input, m_data_length, m_pixels, m_pixel_size);
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else
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m_input.Read (m_pixels, 0, m_pixels.Length);
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}
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}
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}
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internal class AmiMetaData : CmpMetaData
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{
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public uint MaskWidth;
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public uint MaskHeight;
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public uint MaskOffset;
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public uint MaskLength;
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public bool IsMaskCompressed;
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}
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[Export(typeof(ImageFormat))]
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public class AmiFormat : ImageFormat
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{
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public override string Tag { get { return "AM/MAI"; } }
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public override string Description { get { return "MAI image with alpha-channel"; } }
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public override uint Signature { get { return 0; } }
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public AmiFormat ()
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{
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Extensions = new string[] { "am", "ami" };
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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 ("AmiFormat.Write not implemented");
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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if ('A' != stream.ReadByte() || 'M' != stream.ReadByte())
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return null;
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var header = new byte[0x30];
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if (0x2e != stream.Read (header, 2, 0x2e))
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return null;
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uint size = LittleEndian.ToUInt32 (header, 2);
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if (size != stream.Length)
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return null;
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int am_type = header[0x16];
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if (am_type != 2 && am_type != 1 || header[0x18] != 1)
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return null;
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var info = new AmiMetaData();
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info.Width = LittleEndian.ToUInt16 (header, 6);
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info.Height = LittleEndian.ToUInt16 (header, 8);
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info.MaskWidth = LittleEndian.ToUInt16 (header, 0x0a);
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info.MaskHeight = LittleEndian.ToUInt16 (header, 0x0c);
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info.Colors = LittleEndian.ToUInt16 (header, 0x12);
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info.BPP = header[0x14];
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info.IsCompressed = 0 != header[0x15];
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info.DataOffset = LittleEndian.ToUInt32 (header, 0x1a);
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info.DataLength = LittleEndian.ToUInt32 (header, 0x1e);
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info.MaskOffset = LittleEndian.ToUInt32 (header, 0x22);
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info.MaskLength = LittleEndian.ToUInt32 (header, 0x26);
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info.IsMaskCompressed = 0 != header[0x2a];
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if (checked(info.DataLength + info.MaskLength) > size)
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return null;
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return info;
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as AmiMetaData;
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if (null == meta)
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throw new ArgumentException ("AmiFormat.Read should be supplied with AmiMetaData", "info");
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var reader = new Reader (stream, meta);
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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 Stream m_input;
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private AmiMetaData m_info;
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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 byte[] m_alpha;
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private byte[] m_pixels;
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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_pixels; } }
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public Reader (Stream stream, AmiMetaData info)
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{
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m_input = stream;
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m_info = info;
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m_width = (int)info.Width;
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m_height = (int)info.Height;
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m_pixel_size = info.BPP/8;
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if (m_pixel_size != 3 && m_pixel_size != 4)
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throw new InvalidFormatException ("Invalid color depth");
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Format = PixelFormats.Bgra32;
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int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
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m_output = new byte[size];
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uint mask_size = info.IsMaskCompressed ? info.MaskWidth*info.MaskHeight : info.MaskLength;
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m_alpha = new byte[mask_size];
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m_pixels = new byte[m_width*m_height*4];
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}
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public void Unpack ()
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{
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m_input.Position = m_info.DataOffset;
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if (m_info.Colors > 0)
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Palette = RleDecoder.ReadPalette (m_input, m_info.Colors, 3);
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if (m_info.IsCompressed)
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RleDecoder.Unpack (m_input, (int)m_info.DataLength, m_output, m_pixel_size);
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else
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m_input.Read (m_output, 0, m_output.Length);
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m_input.Position = m_info.MaskOffset;
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if (m_info.IsMaskCompressed)
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RleDecoder.Unpack (m_input, (int)m_info.MaskLength, m_alpha, 1);
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else
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m_input.Read (m_alpha, 0, m_alpha.Length);
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int stride = m_width * m_pixel_size;
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for (int y = 0; y < m_height; ++y)
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{
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int dst_line = y*m_width;
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int src_line = (m_height-1-y)*m_width;
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for (int x = 0; x < m_width; ++x)
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{
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m_pixels[(dst_line+x)*4] = m_output[(src_line+x)*m_pixel_size];
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m_pixels[(dst_line+x)*4+1] = m_output[(src_line+x)*m_pixel_size+1];
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m_pixels[(dst_line+x)*4+2] = m_output[(src_line+x)*m_pixel_size+2];
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m_pixels[(dst_line+x)*4+3] = m_alpha[dst_line+x];
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}
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}
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}
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}
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}
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[Export(typeof(ImageFormat))]
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public class MaskFormat : ImageFormat
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{
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public override string Tag { get { return "MSK/MAI"; } }
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public override string Description { get { return "MAI indexed image format"; } }
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public override uint Signature { get { return 0; } }
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public MaskFormat ()
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{
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Extensions = new string[] { "msk" };
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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 ("AmiFormat.Write not implemented");
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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using (var input = new ArcView.Reader (stream))
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{
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uint size = input.ReadUInt32();
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if (size != stream.Length)
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return null;
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uint width = input.ReadUInt32();
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uint height = input.ReadUInt32();
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if ((width*height + 0x410) != size)
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return null;
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return new ImageMetaData {
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Width = width,
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Height = height,
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BPP = 8
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};
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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stream.Position = 0x10;
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var palette = RleDecoder.ReadPalette (stream, 0x100, 4);
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byte[] pixels = new byte[info.Width*info.Height];
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if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
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throw new InvalidFormatException();
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return ImageData.Create (info, PixelFormats.Indexed8, palette, pixels);
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}
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}
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internal class RleDecoder
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{
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public static BitmapPalette ReadPalette (Stream input, int colors, int color_size)
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{
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var palette_data = new byte[colors*color_size];
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if (palette_data.Length != input.Read (palette_data, 0, palette_data.Length))
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throw new InvalidFormatException();
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var palette = new Color[colors];
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for (int i = 0; i < palette.Length; ++i)
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{
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int c = i * color_size;
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palette[i] = Color.FromRgb (palette_data[c+2], palette_data[c+1], palette_data[c]);
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}
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return new BitmapPalette (palette);
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}
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static public void Unpack (Stream input, int input_size, byte[] output, int pixel_size)
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{
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int read = 0;
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int dst = 0;
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while (read < input_size && dst < output.Length)
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{
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int code = input.ReadByte();
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++read;
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if (-1 == code)
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throw new InvalidFormatException ("Unexpected end of file");
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if (0x80 == code)
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throw new InvalidFormatException ("Invalid run-length code");
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if (code < 0x80)
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{
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int count = Math.Min (code * pixel_size, output.Length - dst);
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if (count != input.Read (output, dst, count))
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break;
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read += count;
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dst += count;
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}
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else
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{
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int count = code & 0x7f;
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if (pixel_size != input.Read (output, dst, pixel_size))
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break;
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read += pixel_size;
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int src = dst;
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dst += pixel_size;
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count = Math.Min ((count - 1) * pixel_size, output.Length - dst);
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Binary.CopyOverlapped (output, src, dst, count);
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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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