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243 lines
8.8 KiB
C#
243 lines
8.8 KiB
C#
//! \file ImagePSD.cs
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//! \date Tue Nov 17 18:22:36 2015
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//! \brief Adobe Photoshop file format 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 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.Text;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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namespace GameRes.Formats.Adobe
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{
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internal class PsdMetaData : ImageMetaData
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{
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public int Channels;
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public int Mode;
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}
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[Export(typeof(ImageFormat))]
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public class PsdFormat : ImageFormat
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{
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public override string Tag { get { return "PSD"; } }
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public override string Description { get { return "Adobe Photoshop image format"; } }
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public override uint Signature { get { return 0x53504238; } } // '8BPS'
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (26).ToArray();
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int version = BigEndian.ToInt16 (header, 4);
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if (1 != version)
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return null;
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int channels = BigEndian.ToInt16 (header, 0x0C);
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if (channels < 1 || channels > 56)
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return null;
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uint height = BigEndian.ToUInt32 (header, 0x0E);
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uint width = BigEndian.ToUInt32 (header, 0x12);
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if (width < 1 || width > 30000 || height < 1 || height > 30000)
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return null;
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int bpc = BigEndian.ToInt16 (header, 0x16);
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return new PsdMetaData
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{
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Width = width,
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Height = height,
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Channels = channels,
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BPP = channels * bpc,
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Mode = BigEndian.ToInt16 (header, 0x18),
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};
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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 meta = (PsdMetaData)info;
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using (var reader = new PsdReader (stream, meta))
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{
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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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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("PsdFormat.Write not implemented");
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}
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}
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internal class PsdReader : IDisposable
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{
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IBinaryStream m_input;
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PsdMetaData m_info;
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byte[] m_output;
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int m_channel_size;
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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 PsdReader (IBinaryStream input, PsdMetaData info)
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{
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m_info = info;
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m_input = input;
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int bpc = m_info.BPP / m_info.Channels;
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switch (m_info.Mode)
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{
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case 3:
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if (8 != bpc)
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throw new NotSupportedException();
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if (3 == m_info.Channels)
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Format = PixelFormats.Bgr24;
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else if (4 == m_info.Channels)
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Format = PixelFormats.Bgra32;
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else
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throw new NotSupportedException();
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break;
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// case 2: Format = PixelFormats.Indexed8; break;
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case 1:
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if (8 == bpc)
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Format = PixelFormats.Gray8;
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else if (16 == bpc)
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Format = PixelFormats.Gray16;
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else
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throw new NotSupportedException();
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break;
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case 0: Format = PixelFormats.BlackWhite; break;
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default:
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throw new NotImplementedException ("Not supported PSD color mode");
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}
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m_channel_size = (int)m_info.Height * (int)m_info.Width * bpc / 8;
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}
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public void Unpack ()
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{
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m_input.Position = 0x1A;
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int color_data_length = Binary.BigEndian (m_input.ReadInt32());
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long next_pos = m_input.Position + color_data_length;
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if (0 != color_data_length)
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{
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if (8 == m_info.BPP)
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ReadPalette (color_data_length);
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m_input.Position = next_pos;
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}
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next_pos += 4 + Binary.BigEndian (m_input.ReadInt32());
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m_input.Position = next_pos; // skip Image Resources
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next_pos += 4 + Binary.BigEndian (m_input.ReadInt32());
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m_input.Position = next_pos; // skip Layer and Mask Information
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int compression = Binary.BigEndian (m_input.ReadInt16());
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int remaining = checked((int)(m_input.Length - m_input.Position));
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byte[] pixels;
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if (0 == compression)
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pixels = m_input.ReadBytes (remaining);
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else if (1 == compression)
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pixels = UnpackRLE();
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else
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throw new NotSupportedException ("PSD files with ZIP compression not supported");
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if (1 == m_info.Channels)
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{
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m_output = pixels;
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return;
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}
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int channels = Math.Min (4, m_info.Channels);
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m_output = new byte[channels * m_channel_size];
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int src = 0;
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for (int ch = 0; ch < channels; ++ch)
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{
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int dst = ChannelMap[ch];
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for (int i = 0; i < m_channel_size; ++i)
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{
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m_output[dst] = pixels[src++];
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dst += channels;
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}
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}
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}
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static readonly byte[] ChannelMap = { 2, 1, 0, 3 };
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void ReadPalette (int palette_size)
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{
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var palette_data = m_input.ReadBytes (palette_size);
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if (palette_data.Length != palette_size)
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throw new EndOfStreamException();
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int colors = Math.Min (256, palette_size/3);
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var palette = new Color[colors];
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for (int i = 0; i < colors; ++i)
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{
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int c = i * 3;
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palette[i] = Color.FromRgb (palette_data[c], palette_data[c+1], palette_data[c+2]);
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}
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Palette = new BitmapPalette (palette);
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}
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byte[] UnpackRLE ()
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{
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var scanlines = new int[m_info.Channels, (int)m_info.Height];
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for (int ch = 0; ch < m_info.Channels; ++ch)
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{
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for (uint row = 0; row < m_info.Height; ++row)
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scanlines[ch,row] = Binary.BigEndian (m_input.ReadInt16());
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}
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var pixels = new byte[m_info.Channels * m_channel_size];
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int dst = 0;
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for (int ch = 0; ch < m_info.Channels; ++ch)
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{
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for (uint row = 0; row < m_info.Height; ++row)
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{
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int line_count = scanlines[ch,row];
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int n = 0;
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while (n < line_count)
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{
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int count = m_input.ReadInt8();
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++n;
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if (count >= 0)
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{
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++count;
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m_input.Read (pixels, dst, count);
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dst += count;
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n += count;
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}
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else if (count > -128)
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{
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count = 1 - count;
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byte color = m_input.ReadUInt8();
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++n;
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for (int i = 0; i < count; ++i)
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pixels[dst++] = color;
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}
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}
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}
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}
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return pixels;
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}
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#region IDisposable Members
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public void Dispose ()
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{
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}
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#endregion
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}
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}
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