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437 lines
16 KiB
C#
437 lines
16 KiB
C#
//! \file ImagePICT.cs
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//! \date 2023 Aug 24
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//! \brief Macintosh picture format.
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//
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// Copyright (C) 2023 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 GameRes.Utility;
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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.Windows.Media;
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using System.Windows.Media.Imaging;
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namespace GameRes.Formats.Apple
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{
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internal class PictMetaData : ImageMetaData
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{
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public uint DataOffset;
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}
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[Export(typeof(ImageFormat))]
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public class PictFormat : ImageFormat
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{
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public override string Tag { get => "PICT/MAC"; }
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public override string Description { get => "Apple Macintosh image format"; }
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public override uint Signature { get => 0; }
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public PictFormat ()
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{
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Signatures = new[] { 0u, 0x54434950u };
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Extensions = new[] { "pct", "pict", "pic" };
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}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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int header_pos = 0x200;
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if (file.Signature == 0x54434950) // 'PICT'
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header_pos = 4;
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if (file.Length < header_pos + 0x10)
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return null;
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file.Position = header_pos + 2;
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short top = file.ReadI16BE();
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short left = file.ReadI16BE();
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short bottom = file.ReadI16BE();
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short right = file.ReadI16BE();
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if (file.ReadU16BE() != 0x11)
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return null;
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int version = file.ReadU16BE();
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if (version != 0x2FF)
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return null;
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return new PictMetaData {
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Width = (uint)(right - left),
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Height = (uint)(bottom - top),
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OffsetX = left,
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OffsetY = top,
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BPP = 32,
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DataOffset = (uint)file.Position,
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};
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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 decoder = new PictReader (file, (PictMetaData)info);
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var pixels = decoder.Unpack();
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return ImageData.Create (info, decoder.Format, decoder.Palette, pixels);
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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 System.NotImplementedException ("PictFormat.Write not implemented");
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}
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}
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internal static class BinaryStreamExtension
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{
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static public short ReadI16BE (this IBinaryStream file)
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{
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return Binary.BigEndian (file.ReadInt16());
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}
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static public ushort ReadU16BE (this IBinaryStream file)
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{
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return Binary.BigEndian (file.ReadUInt16());
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}
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static public int ReadI32BE (this IBinaryStream file)
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{
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return Binary.BigEndian (file.ReadInt32());
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}
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static public uint ReadU32BE (this IBinaryStream file)
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{
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return Binary.BigEndian (file.ReadUInt32());
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}
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}
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internal class Pixmap
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{
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public short Version;
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public short PackType;
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public int PackSize;
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public int HorizRes;
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public int VertRes;
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public short PixelType;
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public short BPP;
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public short CompCount;
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public short CompSize;
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public int PlaneBytes;
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public int Table;
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public void Deserialize (IBinaryStream input)
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{
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Version = input.ReadI16BE();
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PackType = input.ReadI16BE();
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PackSize = input.ReadI32BE();
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HorizRes = input.ReadI32BE() >> 16; // read 2 bytes and skip next 2
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VertRes = input.ReadI32BE() >> 16;
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PixelType = input.ReadI16BE();
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BPP = input.ReadI16BE();
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CompCount = input.ReadI16BE();
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CompSize = input.ReadI16BE();
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PlaneBytes = input.ReadI32BE();
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Table = input.ReadI32BE();
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input.Seek (4, SeekOrigin.Current);
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if (BPP <= 0 || BPP > 32 || CompCount <= 0 || CompCount > 4 || CompSize <= 0)
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throw new InvalidFormatException();
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}
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}
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internal class PictReader
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{
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IBinaryStream m_input;
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PictMetaData m_info;
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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 PictReader (IBinaryStream input, PictMetaData info)
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{
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m_input = input;
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m_info = info;
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}
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bool HasAlpha = false;
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byte[] m_buffer;
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public byte[] Unpack ()
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{
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Color[] colormap = null;
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Pixmap pixmap = null;
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m_input.Position = m_info.DataOffset;
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while (m_input.PeekByte() != -1)
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{
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if ((m_input.Position & 1) != 0)
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Skip (1);
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int code = m_input.ReadU16BE();
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if (0x00FF == code || 0xFFFF == code) // EOF
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break;
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switch (code)
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{
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case 0x0000: // NOP
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continue;
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case 0x0001: // Clip
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{
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int length = m_input.ReadU16BE();
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if (length < 2)
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throw new InvalidFormatException();
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Skip (length-2);
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break;
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}
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case 0x0090:
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case 0x0091:
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case 0x0098:
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case 0x0099:
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case 0x009A:
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case 0x009B: // BitsRect
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{
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int stride = 0;
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if (code != 0x9A && code != 0x9B)
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stride = m_input.ReadU16BE();
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else
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Skip (6);
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// FIXME we just read the first bitmap and override an existing frame
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// TODO place bitmap into frame according to its RECT
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m_info.OffsetY = m_input.ReadI16BE();
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m_info.OffsetX = m_input.ReadI16BE();
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m_info.Height = (uint)(m_input.ReadI16BE() - m_info.OffsetY);
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m_info.Width = (uint)(m_input.ReadI16BE() - m_info.OffsetX);
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if (0x9A == code || 0x9B == code || (stride & 0x8000) != 0)
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{
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pixmap = new Pixmap();
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pixmap.Deserialize (m_input);
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HasAlpha = pixmap.CompCount == 4;
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}
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if (code != 0x9A && code != 0x9B)
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{
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int colors = 2;
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int flags = 0;
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if ((stride & 0x8000) != 0)
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{
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Skip (4);
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flags = m_input.ReadU16BE();
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colors = m_input.ReadU16BE() + 1;
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}
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if (null == colormap)
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colormap = new Color[colors];
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if ((stride & 0x8000) != 0)
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{
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for (int i = 0; i < colors; i++)
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{
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int c = m_input.ReadU16BE() % colors;
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if ((flags & 0x8000) != 0)
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c = i;
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int r = m_input.ReadU16BE() / 0x101;
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int g = m_input.ReadU16BE() / 0x101;
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int b = m_input.ReadU16BE() / 0x101;
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colormap[c] = Color.FromRgb ((byte)r, (byte)g, (byte)b);
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}
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}
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else
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{
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var White = Color.FromRgb (0xFF, 0xFF, 0xFF);
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for (int i = 0; i < colors; i++)
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{
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colormap[i] = Color.Subtract (White, colormap[i]);
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}
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}
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}
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Skip (8+8+2);
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// -> Skip (8); // source RECT
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// Skip (8); // destination RECT
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// Skip (2); // transfer mode
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if (code == 0x91 || code == 0x99 || code == 0x9b)
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{
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int length = m_input.ReadU16BE();
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if (length > 2)
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Skip (length - 2);
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}
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if (code != 0x9A && code != 0x9B && (stride & 0x8000) == 0)
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DecodeRleBitmap (stride, 1);
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else
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DecodeRleBitmap (stride, pixmap.BPP);
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break;
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}
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case 0x00A1: // LongComment
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{
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m_input.ReadU16BE(); // comment type
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int length = m_input.ReadU16BE();
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Skip (length);
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break;
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}
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case 0x0C00: // Header
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Skip (0x18);
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break;
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default:
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throw new NotSupportedException (string.Format ("Unknown code 0x{0:X4} in PICT stream.", code));
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}
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}
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if (colormap != null)
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Palette = new BitmapPalette (colormap);
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if (null == m_buffer)
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throw new InvalidFormatException();
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SetFormat (pixmap);
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return RepackPixels (pixmap);
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}
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byte[] RepackPixels (Pixmap pixmap)
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{
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int bpp = m_info.BPP;
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if (bpp <= 16)
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return m_buffer;
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int bytes_per_pixel = bpp / 8;
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int stride = m_info.iWidth * bytes_per_pixel;
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var pixels = new byte[stride * m_info.iHeight];
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int src = 0;
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for (int y = 0; y < m_info.iHeight; ++y)
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{
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int dst = y * stride;
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for (int x = 0; x < m_info.iWidth; ++x)
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{
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if (HasAlpha)
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{
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pixels[dst+3] = m_buffer[src];
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pixels[dst+2] = m_buffer[src+m_info.iWidth];
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pixels[dst+1] = m_buffer[src+m_info.iWidth*2];
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pixels[dst] = m_buffer[src+m_info.iWidth*3];
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}
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else
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{
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pixels[dst+2] = m_buffer[src];
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pixels[dst+1] = m_buffer[src+m_info.iWidth];
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pixels[dst] = m_buffer[src+m_info.iWidth*2];
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}
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++src;
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dst += bytes_per_pixel;
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}
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src += (pixmap.CompCount - 1) * m_info.iWidth;
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}
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return pixels;
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}
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void SetFormat (Pixmap pixmap)
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{
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int bpp = null == pixmap ? 8 : pixmap.BPP;
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if (32 == bpp)
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{
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if (4 == pixmap.CompCount)
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Format = PixelFormats.Bgra32;
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else
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Format = PixelFormats.Bgr32;
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}
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else if (24 == bpp)
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Format = PixelFormats.Bgr24;
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else if (16 == bpp)
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Format = PixelFormats.Bgr555;
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else if (8 == bpp)
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{
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if (Palette != null)
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Format = PixelFormats.Indexed8;
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else
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Format = PixelFormats.Gray8;
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}
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else
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throw new NotSupportedException (string.Format ("Not supported PICT bitdepth -- {0}bpp", bpp));
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m_info.BPP = bpp;
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}
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void Skip (int amount)
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{
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m_input.Seek (amount, SeekOrigin.Current);
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}
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byte[] m_unpack_buffer = new byte[0x800];
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byte[] m_scanline;
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void DecodeRleBitmap (int stride, int bpp)
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{
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if (bpp < 8)
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throw new NotSupportedException();
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if (bpp <= 8)
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stride &= 0x7fff;
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int width = m_info.iWidth;
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int bytes_per_pixel = 1;
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if (16 == bpp)
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{
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bytes_per_pixel = 2;
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width *= 2;
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}
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else if (32 == bpp)
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width *= HasAlpha ? 4 : 3;
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if (stride == 0)
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stride = width;
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int stride_32bpp = m_info.iWidth * 4;
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int total_bytes = stride_32bpp * m_info.iHeight;
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if (null == m_buffer || m_buffer.Length < total_bytes)
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m_buffer = new byte[total_bytes];
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int scanline_length = stride_32bpp * 2;
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if (null == m_scanline || m_scanline.Length < scanline_length)
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{
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m_scanline = new byte[scanline_length];
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}
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if (stride < 8)
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{
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int dst = 0;
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int row_size = width * (bpp / 8);
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for (int y = 0; y < m_info.iHeight; ++y)
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{
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m_input.Read (m_buffer, dst, stride);
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dst += row_size;
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}
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return;
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}
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for (int y = 0; y < m_info.iHeight; ++y)
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{
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int dst = y * width;
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if (stride > 200)
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scanline_length = m_input.ReadU16BE();
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else
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scanline_length = m_input.ReadUInt8();
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if (scanline_length >= m_scanline.Length || scanline_length == 0)
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throw new InvalidFormatException();
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m_input.Read (m_scanline, 0, scanline_length);
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for (int j = 0; j < scanline_length; )
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{
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if ((m_scanline[j] & 0x80) == 0)
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{
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int pixel_count = m_scanline[j] + 1;
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int count = pixel_count * bytes_per_pixel;
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int src = j + 1;
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if ((dst + count) <= total_bytes)
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Buffer.BlockCopy (m_scanline, src, m_buffer, dst, count);
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dst += count;
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j += count + 1;
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}
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else
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{
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int count = (m_scanline[j] ^ 0xFF) + 2;
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int src = j + 1;
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while (count --> 0)
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{
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if ((dst + bytes_per_pixel) <= total_bytes)
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Buffer.BlockCopy (m_scanline, src, m_buffer, dst, bytes_per_pixel);
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dst += bytes_per_pixel;
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}
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j += bytes_per_pixel + 1;
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}
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}
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}
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}
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}
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}
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