Filters/FilterTiff.cs

   1 //
   2 // FilterTiff.cs
   3 //
   4 // Copyright (C) 2006 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Text;
  30
  31 using Beagle.Util;
  32 using Beagle.Daemon;
  33 using Beagle.Util.Tiff;
  34
  35 using SemWeb;
  36
  37 namespace Beagle.Filters {
  38         public class FilterTiff : FilterImage {
  39                 public FilterTiff () : base ()
  40                 {
  41                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("image/tiff"));
  42                 }
  43
  44                 protected override void PullImageProperties ()
  45                 {
  46                         DirectoryEntry e;
  47                         Header header = new Header (Stream);
  48
  49                         e = header.Directory.Lookup (TagId.ExifIfdPointer);
  50                         if (e != null) {
  51                                 ImageDirectory exif = ((SubdirectoryEntry)e).Directory [0];
  52                                 AddTiffDirectoryProperties (this, exif);
  53                         }
  54
  55                         e = header.Directory.Lookup (TagId.SubIFDs);
  56                         if (e != null) {
  57                                 ImageDirectory [] dirs = ((SubdirectoryEntry)e).Directory;
  58
  59                                 foreach (ImageDirectory subdir in dirs)
  60                                         AddTiffDirectoryProperties (this, subdir);
  61                         }
  62
  63                         // we filter ifd0 last so that we pick up the
  64                         // width and height from the full resolution
  65                         // version if it exists
  66
  67                         AddTiffDirectoryProperties (this, header.Directory);
  68                 }
  69
  70                 internal static void AddTiffDirectoryProperties (FilterTiff filter, ImageDirectory directory)
  71                 {
  72                         foreach (DirectoryEntry e in directory.Entries) {
  73                                 switch (e.Id) {
  74                                 case TagId.ImageDescription:
  75                                         filter.AddProperty (Beagle.Property.New ("exif:ImageDescription", e.ValueAsString [0]));
  76                                         break;
  77                                 case TagId.UserComment:
  78                                         filter.AddProperty (Beagle.Property.New ("exif:UserComment", e.ValueAsString [0]));
  79                                         break;
  80                                 case TagId.DateTimeOriginal:
  81                                         AddDateProperty (filter, "exif:DateTimeOriginal", e.ValueAsString [0]);
  82                                         break;
  83                                 case TagId.DateTimeDigitized:
  84                                         AddDateProperty (filter, "exif:DateTimeDigitized", e.ValueAsString [0]);
  85                                         break;
  86                                 case TagId.DateTime:
  87                                         AddDateProperty (filter, "exif:DateTime", e.ValueAsString [0]);
  88                                         break;
  89                                 case TagId.PixelXDimension:
  90                                         filter.Width = (int) e.ValueAsLong [0];
  91                                         //filter.AddProperty (Beagle.Property.NewUnsearched ("exif:PixelXDimension", e.ValueAsString [0]));
  92                                         break;
  93                                 case TagId.PixelYDimension:
  94                                         filter.Height = (int) e.ValueAsLong [0];
  95                                         //filter.AddProperty (Beagle.Property.NewUnsearched ("exif:PixelYDimension", e.ValueAsString [0]));
  96                                         break;
  97                                 case TagId.ImageWidth:
  98                                         uint wval = e.ValueAsLong [0];
  99                                         if (filter.Width < wval)
 100                                                 filter.Width = (int) wval;
 101                                         break;
 102                                 case TagId.ImageLength:
 103                                         uint hval = e.ValueAsLong [0];
 104                                         if (filter.Height < hval)
 105                                                 filter.Height = (int) hval;
 106                                         break;
 107                                 case TagId.ShutterSpeedValue:
 108                                 case TagId.ExposureTime:
 109                                 case TagId.ISOSpeedRatings:
 110                                 case TagId.ApertureValue:
 111                                         break;
 112                                 case TagId.XMP:
 113                                         XmpFile xmp = new XmpFile (new System.IO.MemoryStream (e.RawData));
 114                                         filter.AddXmpProperties (xmp);
 115                                         break;
 116                                 }
 117                         }
 118                 }
 119
 120                 private static void AddDateProperty (FilterImage filter, string name, string value) {
 121                         try {
 122                                 DateTime time = DirectoryEntry.DateTimeFromString (value);
 123                                 filter.AddProperty (Beagle.Property.NewDate (name, time));
 124                         } catch (ArgumentOutOfRangeException e) {
 125                                 Logger.Log.Debug ("{0} = '{1}' is invalid.", name, value);
 126                         }
 127                 }
 128         }
 129 }