DwarfCorp/PSD/PsdFile/ImageResources/ResolutionInfo.cs

/////////////////////////////////////////////////////////////////////////////////
//
// Photoshop PSD FileType Plugin for Paint.NET
// http://psdplugin.codeplex.com/
//
// This software is provided under the MIT License:
//   Copyright (c) 2006-2007 Frank Blumenberg
//   Copyright (c) 2010-2017 Tao Yue
//
// Portions of this file are provided under the BSD 3-clause License:
//   Copyright (c) 2006, Jonas Beckeman
//
// See LICENSE.txt for complete licensing and attribution information.
//
/////////////////////////////////////////////////////////////////////////////////

using System;

namespace PhotoshopFile
{
  /// <summary>
  /// Summary description for ResolutionInfo.
  /// </summary>
  public class ResolutionInfo : ImageResource
  {
    public override ResourceID ID => ResourceID.ResolutionInfo;

    /// <summary>
    /// Horizontal DPI.
    /// </summary>
    public UFixed16_16 HDpi { get; set; }

    /// <summary>
    /// Vertical DPI.
    /// </summary>
    public UFixed16_16 VDpi { get; set; }

    /// <summary>
    /// 1 = pixels per inch, 2 = pixels per centimeter
    /// </summary>
    public enum ResUnit
    {
      PxPerInch = 1,
      PxPerCm = 2
    }

    /// <summary>
    /// Display units for horizontal resolution.  This only affects the
    /// user interface; the resolution is still stored in the PSD file
    /// as pixels/inch.
    /// </summary>
    public ResUnit HResDisplayUnit { get; set; }

    /// <summary>
    /// Display units for vertical resolution.
    /// </summary>
    public ResUnit VResDisplayUnit { get; set; }

    /// <summary>
    /// Physical units.
    /// </summary>
    public enum Unit
    {
      Inches = 1,
      Centimeters = 2,
      Points = 3,
      Picas = 4,
      Columns = 5
    }

    public Unit WidthDisplayUnit { get; set; }

    public Unit HeightDisplayUnit { get; set; }
    
    public ResolutionInfo() : base(String.Empty)
    {
    }

    public ResolutionInfo(PsdBinaryReader reader, string name)
      : base(name)
    {
      this.HDpi = new UFixed16_16(reader.ReadUInt32());
      this.HResDisplayUnit = (ResUnit)reader.ReadInt16();
      this.WidthDisplayUnit = (Unit)reader.ReadInt16();

      this.VDpi = new UFixed16_16(reader.ReadUInt32());
      this.VResDisplayUnit = (ResUnit)reader.ReadInt16();
      this.HeightDisplayUnit = (Unit)reader.ReadInt16();
    }

    protected override void WriteData(PsdBinaryWriter writer)
    {
      writer.Write(HDpi.Integer);
      writer.Write(HDpi.Fraction);
      writer.Write((Int16)HResDisplayUnit);
      writer.Write((Int16)WidthDisplayUnit);

      writer.Write(VDpi.Integer);
      writer.Write(VDpi.Fraction);
      writer.Write((Int16)VResDisplayUnit);
      writer.Write((Int16)HeightDisplayUnit);
    }

  }
}