fpexif: Add support of XMP meta data (reading).

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@8201 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/fpexif/examples/metadata_viewer/MetadataViewer.lpi

@@ -25,13 +25,19 @@
         <Mode0 Name="default"/>
       </Modes>
     </RunParams>
-    <RequiredPackages Count="2">
+    <RequiredPackages Count="4">
       <Item1>
-        <PackageName Value="fpexif_pkg"/>
+        <PackageName Value="SynEditDsgn"/>
       </Item1>
       <Item2>
-        <PackageName Value="LCL"/>
+        <PackageName Value="SynEdit"/>
       </Item2>
+      <Item3>
+        <PackageName Value="fpexif_pkg"/>
+      </Item3>
+      <Item4>
+        <PackageName Value="LCL"/>
+      </Item4>
     </RequiredPackages>
     <Units Count="3">
       <Unit0>
@@ -70,6 +76,7 @@
     </CodeGeneration>
     <Linking>
       <Debugging>
+        <DebugInfoType Value="dsDwarf2Set"/>
         <UseExternalDbgSyms Value="True"/>
       </Debugging>
       <Options>

components/fpexif/examples/metadata_viewer/mdvmain.lfm

@@ -147,7 +147,7 @@ object MainForm: TMainForm
       TabOrder = 1
       OnChange = PageControl1Change
       object PgMetadata: TTabSheet
-        Caption = 'Meta data'
+        Caption = 'EXIF, IPTC'
         ClientHeight = 511
         ClientWidth = 639
         object TagListView: TListView
@@ -243,6 +243,539 @@ object MainForm: TMainForm
           end
         end
       end
+      object PgXMP: TTabSheet
+        Caption = 'XMP'
+        ClientHeight = 511
+        ClientWidth = 639
+        inline SynEdit: TSynEdit
+          Left = 0
+          Height = 231
+          Top = 280
+          Width = 639
+          Align = alClient
+          Font.Height = -13
+          Font.Name = 'Courier New'
+          Font.Pitch = fpFixed
+          Font.Quality = fqNonAntialiased
+          ParentColor = False
+          ParentFont = False
+          TabOrder = 0
+          Gutter.Width = 57
+          Gutter.MouseActions = <>
+          RightGutter.Width = 0
+          RightGutter.MouseActions = <>
+          Highlighter = SynXMLSyn
+          Keystrokes = <          
+            item
+              Command = ecUp
+              ShortCut = 38
+            end          
+            item
+              Command = ecSelUp
+              ShortCut = 8230
+            end          
+            item
+              Command = ecScrollUp
+              ShortCut = 16422
+            end          
+            item
+              Command = ecDown
+              ShortCut = 40
+            end          
+            item
+              Command = ecSelDown
+              ShortCut = 8232
+            end          
+            item
+              Command = ecScrollDown
+              ShortCut = 16424
+            end          
+            item
+              Command = ecLeft
+              ShortCut = 37
+            end          
+            item
+              Command = ecSelLeft
+              ShortCut = 8229
+            end          
+            item
+              Command = ecWordLeft
+              ShortCut = 16421
+            end          
+            item
+              Command = ecSelWordLeft
+              ShortCut = 24613
+            end          
+            item
+              Command = ecRight
+              ShortCut = 39
+            end          
+            item
+              Command = ecSelRight
+              ShortCut = 8231
+            end          
+            item
+              Command = ecWordRight
+              ShortCut = 16423
+            end          
+            item
+              Command = ecSelWordRight
+              ShortCut = 24615
+            end          
+            item
+              Command = ecPageDown
+              ShortCut = 34
+            end          
+            item
+              Command = ecSelPageDown
+              ShortCut = 8226
+            end          
+            item
+              Command = ecPageBottom
+              ShortCut = 16418
+            end          
+            item
+              Command = ecSelPageBottom
+              ShortCut = 24610
+            end          
+            item
+              Command = ecPageUp
+              ShortCut = 33
+            end          
+            item
+              Command = ecSelPageUp
+              ShortCut = 8225
+            end          
+            item
+              Command = ecPageTop
+              ShortCut = 16417
+            end          
+            item
+              Command = ecSelPageTop
+              ShortCut = 24609
+            end          
+            item
+              Command = ecLineStart
+              ShortCut = 36
+            end          
+            item
+              Command = ecSelLineStart
+              ShortCut = 8228
+            end          
+            item
+              Command = ecEditorTop
+              ShortCut = 16420
+            end          
+            item
+              Command = ecSelEditorTop
+              ShortCut = 24612
+            end          
+            item
+              Command = ecLineEnd
+              ShortCut = 35
+            end          
+            item
+              Command = ecSelLineEnd
+              ShortCut = 8227
+            end          
+            item
+              Command = ecEditorBottom
+              ShortCut = 16419
+            end          
+            item
+              Command = ecSelEditorBottom
+              ShortCut = 24611
+            end          
+            item
+              Command = ecToggleMode
+              ShortCut = 45
+            end          
+            item
+              Command = ecCopy
+              ShortCut = 16429
+            end          
+            item
+              Command = ecPaste
+              ShortCut = 8237
+            end          
+            item
+              Command = ecDeleteChar
+              ShortCut = 46
+            end          
+            item
+              Command = ecCut
+              ShortCut = 8238
+            end          
+            item
+              Command = ecDeleteLastChar
+              ShortCut = 8
+            end          
+            item
+              Command = ecDeleteLastChar
+              ShortCut = 8200
+            end          
+            item
+              Command = ecDeleteLastWord
+              ShortCut = 16392
+            end          
+            item
+              Command = ecUndo
+              ShortCut = 32776
+            end          
+            item
+              Command = ecRedo
+              ShortCut = 40968
+            end          
+            item
+              Command = ecLineBreak
+              ShortCut = 13
+            end          
+            item
+              Command = ecSelectAll
+              ShortCut = 16449
+            end          
+            item
+              Command = ecCopy
+              ShortCut = 16451
+            end          
+            item
+              Command = ecBlockIndent
+              ShortCut = 24649
+            end          
+            item
+              Command = ecLineBreak
+              ShortCut = 16461
+            end          
+            item
+              Command = ecInsertLine
+              ShortCut = 16462
+            end          
+            item
+              Command = ecDeleteWord
+              ShortCut = 16468
+            end          
+            item
+              Command = ecBlockUnindent
+              ShortCut = 24661
+            end          
+            item
+              Command = ecPaste
+              ShortCut = 16470
+            end          
+            item
+              Command = ecCut
+              ShortCut = 16472
+            end          
+            item
+              Command = ecDeleteLine
+              ShortCut = 16473
+            end          
+            item
+              Command = ecDeleteEOL
+              ShortCut = 24665
+            end          
+            item
+              Command = ecUndo
+              ShortCut = 16474
+            end          
+            item
+              Command = ecRedo
+              ShortCut = 24666
+            end          
+            item
+              Command = ecGotoMarker0
+              ShortCut = 16432
+            end          
+            item
+              Command = ecGotoMarker1
+              ShortCut = 16433
+            end          
+            item
+              Command = ecGotoMarker2
+              ShortCut = 16434
+            end          
+            item
+              Command = ecGotoMarker3
+              ShortCut = 16435
+            end          
+            item
+              Command = ecGotoMarker4
+              ShortCut = 16436
+            end          
+            item
+              Command = ecGotoMarker5
+              ShortCut = 16437
+            end          
+            item
+              Command = ecGotoMarker6
+              ShortCut = 16438
+            end          
+            item
+              Command = ecGotoMarker7
+              ShortCut = 16439
+            end          
+            item
+              Command = ecGotoMarker8
+              ShortCut = 16440
+            end          
+            item
+              Command = ecGotoMarker9
+              ShortCut = 16441
+            end          
+            item
+              Command = ecSetMarker0
+              ShortCut = 24624
+            end          
+            item
+              Command = ecSetMarker1
+              ShortCut = 24625
+            end          
+            item
+              Command = ecSetMarker2
+              ShortCut = 24626
+            end          
+            item
+              Command = ecSetMarker3
+              ShortCut = 24627
+            end          
+            item
+              Command = ecSetMarker4
+              ShortCut = 24628
+            end          
+            item
+              Command = ecSetMarker5
+              ShortCut = 24629
+            end          
+            item
+              Command = ecSetMarker6
+              ShortCut = 24630
+            end          
+            item
+              Command = ecSetMarker7
+              ShortCut = 24631
+            end          
+            item
+              Command = ecSetMarker8
+              ShortCut = 24632
+            end          
+            item
+              Command = ecSetMarker9
+              ShortCut = 24633
+            end          
+            item
+              Command = EcFoldLevel1
+              ShortCut = 41009
+            end          
+            item
+              Command = EcFoldLevel2
+              ShortCut = 41010
+            end          
+            item
+              Command = EcFoldLevel3
+              ShortCut = 41011
+            end          
+            item
+              Command = EcFoldLevel4
+              ShortCut = 41012
+            end          
+            item
+              Command = EcFoldLevel5
+              ShortCut = 41013
+            end          
+            item
+              Command = EcFoldLevel6
+              ShortCut = 41014
+            end          
+            item
+              Command = EcFoldLevel7
+              ShortCut = 41015
+            end          
+            item
+              Command = EcFoldLevel8
+              ShortCut = 41016
+            end          
+            item
+              Command = EcFoldLevel9
+              ShortCut = 41017
+            end          
+            item
+              Command = EcFoldLevel0
+              ShortCut = 41008
+            end          
+            item
+              Command = EcFoldCurrent
+              ShortCut = 41005
+            end          
+            item
+              Command = EcUnFoldCurrent
+              ShortCut = 41003
+            end          
+            item
+              Command = EcToggleMarkupWord
+              ShortCut = 32845
+            end          
+            item
+              Command = ecNormalSelect
+              ShortCut = 24654
+            end          
+            item
+              Command = ecColumnSelect
+              ShortCut = 24643
+            end          
+            item
+              Command = ecLineSelect
+              ShortCut = 24652
+            end          
+            item
+              Command = ecTab
+              ShortCut = 9
+            end          
+            item
+              Command = ecShiftTab
+              ShortCut = 8201
+            end          
+            item
+              Command = ecMatchBracket
+              ShortCut = 24642
+            end          
+            item
+              Command = ecColSelUp
+              ShortCut = 40998
+            end          
+            item
+              Command = ecColSelDown
+              ShortCut = 41000
+            end          
+            item
+              Command = ecColSelLeft
+              ShortCut = 40997
+            end          
+            item
+              Command = ecColSelRight
+              ShortCut = 40999
+            end          
+            item
+              Command = ecColSelPageDown
+              ShortCut = 40994
+            end          
+            item
+              Command = ecColSelPageBottom
+              ShortCut = 57378
+            end          
+            item
+              Command = ecColSelPageUp
+              ShortCut = 40993
+            end          
+            item
+              Command = ecColSelPageTop
+              ShortCut = 57377
+            end          
+            item
+              Command = ecColSelLineStart
+              ShortCut = 40996
+            end          
+            item
+              Command = ecColSelLineEnd
+              ShortCut = 40995
+            end          
+            item
+              Command = ecColSelEditorTop
+              ShortCut = 57380
+            end          
+            item
+              Command = ecColSelEditorBottom
+              ShortCut = 57379
+            end>
+          MouseActions = <>
+          MouseTextActions = <>
+          MouseSelActions = <>
+          Lines.Strings = (
+            'SynEdit'
+          )
+          VisibleSpecialChars = [vscSpace, vscTabAtLast]
+          SelectedColor.BackPriority = 50
+          SelectedColor.ForePriority = 50
+          SelectedColor.FramePriority = 50
+          SelectedColor.BoldPriority = 50
+          SelectedColor.ItalicPriority = 50
+          SelectedColor.UnderlinePriority = 50
+          SelectedColor.StrikeOutPriority = 50
+          BracketHighlightStyle = sbhsBoth
+          BracketMatchColor.Background = clNone
+          BracketMatchColor.Foreground = clNone
+          BracketMatchColor.Style = [fsBold]
+          FoldedCodeColor.Background = clNone
+          FoldedCodeColor.Foreground = clGray
+          FoldedCodeColor.FrameColor = clGray
+          MouseLinkColor.Background = clNone
+          MouseLinkColor.Foreground = clBlue
+          LineHighlightColor.Background = clNone
+          LineHighlightColor.Foreground = clNone
+          inline SynLeftGutterPartList1: TSynGutterPartList
+            object SynGutterMarks1: TSynGutterMarks
+              Width = 24
+              MouseActions = <>
+            end
+            object SynGutterLineNumber1: TSynGutterLineNumber
+              Width = 17
+              MouseActions = <>
+              MarkupInfo.Background = clBtnFace
+              MarkupInfo.Foreground = clNone
+              DigitCount = 2
+              ShowOnlyLineNumbersMultiplesOf = 1
+              ZeroStart = False
+              LeadingZeros = False
+            end
+            object SynGutterChanges1: TSynGutterChanges
+              Width = 4
+              MouseActions = <>
+              ModifiedColor = 59900
+              SavedColor = clGreen
+            end
+            object SynGutterSeparator1: TSynGutterSeparator
+              Width = 2
+              MouseActions = <>
+              MarkupInfo.Background = clWhite
+              MarkupInfo.Foreground = clGray
+            end
+            object SynGutterCodeFolding1: TSynGutterCodeFolding
+              MouseActions = <>
+              MarkupInfo.Background = clNone
+              MarkupInfo.Foreground = clGray
+              MouseActionsExpanded = <>
+              MouseActionsCollapsed = <>
+            end
+          end
+        end
+        object XMPListView: TListView
+          Left = 0
+          Height = 275
+          Top = 0
+          Width = 639
+          Align = alTop
+          AutoWidthLastColumn = True
+          Columns = <          
+            item
+              Caption = 'Description'
+              Width = 200
+            end          
+            item
+              Caption = 'Value'
+              Width = 435
+            end>
+          TabOrder = 1
+          ViewStyle = vsReport
+        end
+        object Splitter4: TSplitter
+          Cursor = crVSplit
+          Left = 0
+          Height = 5
+          Top = 275
+          Width = 639
+          Align = alTop
+          ResizeAnchor = akTop
+        end
+      end
       object PgImage: TTabSheet
         Caption = 'Image'
         ClientHeight = 511
@@ -385,4 +918,11 @@ object MainForm: TMainForm
       1FDF9F1F363F97D9C744ECB29398DFDF7A8BC172
     }
   end
+  object SynXMLSyn: TSynXMLSyn
+    DefaultFilter = 'XML Document (*.xml,*.xsd,*.xsl,*.xslt,*.dtd)|*.xml;*.xsd;*.xsl;*.xslt;*.dtd'
+    Enabled = False
+    WantBracesParsed = False
+    Left = 480
+    Top = 145
+  end
 end

components/fpexif/examples/metadata_viewer/mdvmain.pas

@@ -5,9 +5,9 @@ unit mdvMain;
 interface
 
 uses
-  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, ShellCtrls,
-  ExtCtrls, ComCtrls, StdCtrls,
-  fpeGlobal, fpeMetadata; 
+  Classes, SysUtils, FileUtil, SynEdit, SynHighlighterXML, Forms, Controls,
+  Graphics, Dialogs, ShellCtrls, ExtCtrls, ComCtrls, StdCtrls, fpeGlobal,
+  fpeMetadata; 
 
 type
 
@@ -23,6 +23,7 @@ type
     Image: TImage;
     Label1: TLabel;
     LblChangeDate: TLabel;
+    XMPListView: TListView;
     Messages: TMemo;
     PageControl1: TPageControl;
     Panel1: TPanel;
@@ -33,9 +34,13 @@ type
     PreviewImage: TImage;
     ImageList: TImageList;
     Splitter3: TSplitter;
+    Splitter4: TSplitter;
     StatusBar1: TStatusBar;
     PgMetadata: TTabSheet;
     PgImage: TTabSheet;
+    PgXMP: TTabSheet;
+    SynEdit: TSynEdit;
+    SynXMLSyn: TSynXMLSyn;
     TagListView: TListView;
     ShellPanel: TPanel;
     ShellListView: TShellListView;
@@ -182,7 +187,8 @@ begin
   ShellListView.SmallImages := ImageList;
   ShellTreeView.Images := ImageList;
   {$ENDIF}
-  //ShellListView.Parent.DoubleBuffered := true;
+  
+//  XMPListView.ControlStyle:= XMPListView.Controlstyle + [csOpaque];
 end;
 
 procedure TMainForm.BtnChangeDateClick(Sender: TObject);
@@ -248,6 +254,7 @@ end;
 procedure TMainForm.LoadFile(const AFileName: String);
 var
   lTag: TTag;
+  xmpTag: String;
   item: TListItem;
   i: Integer;
   ms: TMemoryStream;
@@ -315,6 +322,21 @@ begin
       end else
         DateTimePanel.Hide;
       
+      if FImgInfo.HasXMP then begin
+        ms := TMemoryStream.Create;
+        FImgInfo.XMPData.SaveToStream(ms);
+        ms.Position := 0;
+        SynEdit.Lines.LoadFromStream(ms);
+        
+        XMPListView.Clear;
+        for i := 0 to FImgInfo.XMPData.TagCount-1 do begin
+          xmpTag := FImgInfo.XMPData.TagByIndex[i];
+          item := XMPListView.Items.Add;
+          item.Caption := Copy(xmptag, 1, pos('=', xmptag)-1);
+          item.SubItems.Add(copy(xmptag, pos('=', xmptag)+1));
+        end;
+      end;
+
       if FImgInfo.HasIptc then begin
         for i := 0 to FImgInfo.IptcData.TagCount-1 do begin
           lTag := FImgInfo.IptcData.TagByIndex[i];

components/fpexif/fpeexifreadwrite.pas

@@ -63,7 +63,7 @@ type
     procedure ReadIFD(AStream: TStream; AParent: TTagID); override;
   public
     constructor Create(AImgInfo: TImgInfo); override;
-    function ReadExifHeader(AStream: TStream): Boolean;
+    class function ReadExifHeader(AStream: TStream): Boolean;
     procedure ReadFromStream(AStream: TStream; AImgFormat: TImgFormat); override;
     function ReadTiffHeader(AStream: TStream; out ABigEndian: Boolean): Boolean;
     property BigEndian: Boolean read FBigEndian;
@@ -485,14 +485,19 @@ end;
 // Reads the header of the APP1 jpeg segment ("EXIF segment")
 // Note that the segment marker and the segment size already have been read.
 // The function returns FALSE if the header is not valid. 
-// Call ReadFromStream immediately afterwards
+// In this case, the stream position is reset to where it started.
+// Otherwise ReadFromStream can be called immediately afterwards.
 //------------------------------------------------------------------------------
-function TExifReader.ReadExifHeader(AStream: TStream): Boolean;
+class function TExifReader.ReadExifHeader(AStream: TStream): Boolean;
 var
   hdr: array[0..5] of ansichar;
+  p: Int64;
 begin
+  p := AStream.Position;
   AStream.Read({%H-}hdr[0], SizeOf(hdr));
   Result := CompareMem(@hdr[0], @EXIF_SIGNATURE[0], SizeOf(hdr));
+  if not Result then
+    AStream.Position := p;
 end;
 
 //------------------------------------------------------------------------------

components/fpexif/fpeglobal.pas

@@ -16,13 +16,14 @@ type
   TMetaDataKind = (
     mdkExif,                   // Complete Exif (incl MakerNotes)
     mdkExifNoMakerNotes,       // Exif without MakerNotes (instead of mdkExif)
+    mdkXMP,                    // XMP
     mdkIPTC,                   // IPTC
     mdkComment                 // Comment segment
   );
   TMetaDataKinds = set of TMetaDataKind;
 
 const
-  mdkAll = [mdkExif, mdkIPTC, mdkComment];
+  mdkAll = [mdkExif, mdkXMP, mdkIPTC, mdkComment];
 
 type
 {$IFNDEF FPC}

components/fpexif/fpemetadata.pas

@@ -14,7 +14,7 @@ uses
   LazUTF8,
  {$ENDIF}
   fpeGlobal,
-  fpeExifData, fpeIptcData;
+  fpeExifData, fpeIptcData, fpeXmpData;
 
 type
   TImgInfo = class;
@@ -64,6 +64,7 @@ type
   private
     FExifData: TExifData;
     FIptcData: TIptcData;
+    FXmpData: TXmpData;
     function GetComment: String;
     function GetWarnings: String;
     procedure SetComment(const AValue: String);
@@ -86,12 +87,14 @@ type
 
     function CreateExifData(ABigEndian: Boolean = false): TExifData;
     function CreateIptcData: TIptcData;
+    function CreateXmpData: TXmpData;
 
     function HasComment: Boolean;
     function HasExif: Boolean;
     function HasIptc: Boolean;
     function HasThumbnail: Boolean;
     function HasWarnings: boolean;
+    function HasXMP: Boolean;
 
     { Comment stored in the Jpeg COM segment }
     property Comment: String read GetComment write SetComment;
@@ -115,7 +118,8 @@ type
     property WriteJFIFandEXIF: Boolean read FWriteJFIFandEXIF write FWriteJFIFandEXIF;
 
     property ExifData: TExifData read FExifData;
-    property IptcData: TIptcData read FIptcData;  // to do: rename to IptcData
+    property IptcData: TIptcData read FIptcData;
+    property XmpData: TXmpData read FXmpData;
   end;
 
 
@@ -260,6 +264,7 @@ begin
   FWarnings.Free;
   FExifData.Free;
   FIptcData.Free;
+  FXmpData.Free;
   inherited;
 end;
 
@@ -279,6 +284,14 @@ begin
   Result := FIptcData;
 end;
 
+function TImgInfo.CreateXmpData: TXmpData;
+begin
+  FWarnings.Clear;
+  FXmpData.Free;
+  FXmpData := TXmpData.Create;
+  Result := FXmpData;
+end;
+
 procedure TImgInfo.Error(const AMsg: String);
 begin
   raise EFpExif.Create(AMsg);
@@ -352,6 +365,11 @@ begin
   Result := FWarnings.Count > 0;
 end;
 
+function TImgInfo.HasXMP: Boolean;
+begin
+  Result := FXmpData <> nil;
+end;
+
 procedure TImgInfo.LoadFromFile(const AFileName: String);
 var
   stream: TStream;
@@ -527,22 +545,34 @@ begin
     p := AStream.Position;
     case marker of
       M_EXIF:
-        if FMetaDataKinds * [mdkExif, mdkExifNoMakerNotes] <> [] then begin
-          reader := TExifReader.Create(self);
-          try
-            if TExifReader(reader).ReadExifHeader(AStream) and
-               TExifReader(reader).ReadTiffHeader(AStream, bigEndian) then
-            begin
-              FExifData := CreateExifData(bigEndian);
-              try
-                reader.ReadFromStream(AStream, ifJpeg);
-              except
-                FreeAndNil(FExifData);
-                raise;
+        if FMetaDataKinds * [mdkExif, mdkExifNoMakerNotes, mdkXMP] <> [] then begin
+          if TExifReader.ReadExifHeader(AStream) then
+          begin
+            reader := TExifReader.Create(self);
+            try
+              if TExifReader(reader).ReadTiffHeader(AStream, bigEndian) then
+              begin
+                FExifData := CreateExifData(bigEndian);
+                try
+                  reader.ReadFromStream(AStream, ifJpeg);
+                except
+                  FreeAndNil(FExifData);
+                  raise;
+                end;
               end;
+            finally
+              reader.Free;
+            end;
+          end else
+          if HasXMPHeader(AStream) then
+          begin
+            FXmpData := CreateXMPData;
+            try
+              FXmpData.ReadFromStream(AStream, size - Length(XMP_KEY));
+            except
+              FreeAndNil(FXmpData);
+              raise;
             end;
-          finally
-            reader.Free;
           end;
         end;
       M_IPTC:

components/fpexif/fpexif_pkg.lpk

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <CONFIG>
-  <Package Version="4">
+  <Package Version="5">
     <Name Value="fpexif_pkg"/>
     <Author Value="Werner Pamler"/>
     <CompilerOptions>
@@ -12,7 +12,7 @@
     <Description Value="Library for displaying and editing of meta data (EXIF, IPTC) in images."/>
     <License Value="LGPL with linking exception (like Lazarus)"/>
     <Version Minor="1"/>
-    <Files Count="20">
+    <Files Count="21">
       <Item1>
         <Filename Value="fpeglobal.pas"/>
         <UnitName Value="fpeGlobal"/>
@@ -83,17 +83,22 @@
       </Item17>
       <Item18>
         <Filename Value="fpemakernotesanyo.pas"/>
-        <UnitName Value="fpemakernotesanyo"/>
+        <UnitName Value="fpeMakerNoteSanyo"/>
       </Item18>
       <Item19>
         <Filename Value="fpemakernotecasio.pas"/>
-        <UnitName Value="fpemakernotecasio"/>
+        <UnitName Value="fpeMakerNoteCasio"/>
       </Item19>
       <Item20>
         <Filename Value="fpemakernotecanon.pas"/>
         <UnitName Value="fpeMakerNoteCanon"/>
       </Item20>
+      <Item21>
+        <Filename Value="fpexmpdata.pas"/>
+        <UnitName Value="fpeXMPData"/>
+      </Item21>
     </Files>
+    <CompatibilityMode Value="True"/>
     <i18n>
       <EnableI18N Value="True"/>
       <OutDir Value="languages"/>

components/fpexif/fpexif_pkg.pas

@@ -12,7 +12,7 @@ uses
   fpeIptcReadWrite, fpeExifData, fpeIptcData, fpeStrConsts, fpeMakerNote, 
   fpeMakerNoteNikon, fpeMakerNoteMinolta, fpeMakerNoteOlympus, 
   fpeMakerNoteEpson, fpeMakerNoteFuji, fpeMakerNoteSanyo, fpeMakerNoteCasio, 
-  fpeMakerNoteCanon;
+  fpeMakerNoteCanon, fpeXMPData;
 
 implementation
 

components/fpexif/fpexmpdata.pas

@@ -0,0 +1,187 @@
+unit fpeXMPData;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, contnrs,
+  {$IFDEF FPC}
+  laz2_dom, laz2_xmlread,
+  {$ENDIF}
+  fpeGlobal, fpeTags;
+
+const
+  XMP_BASE_KEY = 'http://ns.adobe.com/xap/1.0/';
+  XMP_KEY = XMP_BASE_KEY + #0; 
+
+type
+  TXMPData = class
+  private
+    FData: String;
+    FDoc: TXMLDocument;
+    FTags: TStringList;
+//    FTags: TTagList;
+    function GetTagByIndex(AIndex: Integer): String;
+    function GetTagByName(ATagName: String): String;
+    function GetTagCount: Integer;
+  protected
+    {$IFDEF FPC}
+    procedure Create_RDFDescription_Tags(ANode: TDOMNode);
+    procedure CreateTags;
+    {$ENDIF}
+  public
+    constructor Create;
+    destructor Destroy; override;
+    procedure ReadFromStream(AStream: TStream; ASize: Integer = -1);
+    procedure SaveToStream(AStream: TStream);
+    property TagByIndex[AIndex: Integer]: String read GetTagByIndex;
+    property TagByName[ATagName: String]: String read GetTagByName;
+    property TagCount: Integer read GetTagCount;
+  end;
+      
+function HasXMPHeader(AStream: TStream): Boolean;
+
+
+implementation
+
+function HasXMPHeader(AStream: TStream): Boolean;
+var
+  p: Int64;
+  hdr: array of ansichar; 
+begin
+  p := AStream.Position;
+  SetLength(hdr, Length(XMP_KEY));
+  AStream.Read(hdr[0], Length(XMP_KEY)); 
+  Result := CompareMem(@hdr[0], @XMP_KEY[1], Length(XMP_KEY));
+  if not Result then
+    AStream.Position := p;
+end;
+
+  
+{ TXMPData }
+  
+constructor TXMPData.Create;
+begin
+  inherited;
+  FTags := TStringList.Create; //TTagList.Create;
+end;
+
+destructor TXMPData.Destroy; 
+begin
+  {$IFDEF FPC}
+  FDoc.Free;
+  {$ENDIF}
+  FTags.Free;
+  inherited;
+end;
+
+{$IFDEF FPC}
+procedure TXMPData.Create_RDFDescription_Tags(ANode: TDOMNode);
+var
+  node: TDOMNode;
+  nodeName: String;
+  i: Integer;
+  attr: TDOMNode;
+  tagName, tagValue: String;
+  lTag: TTag;
+begin
+  while ANode <> nil do begin
+    nodeName := ANode.NodeName;
+    for i := 0 to ANode.Attributes.Length-1 do
+    begin
+      attr := ANode.Attributes.Item[i];
+      tagName := attr.NodeName;
+      tagValue := attr.NodeValue;
+      FTags.Add(tagName + '=' + tagValue);
+    end;
+    if ANode.HasChildNodes then
+    begin
+      node := ANode.FirstChild;
+      while node <> nil do 
+      begin
+        nodeName := node.NodeName;
+        tagValue := node.TextContent;
+        if tagName <> '' then
+          FTags.Add(nodeName + '=' + tagValue);
+        node := node.NextSibling;
+      end;
+    end;
+    ANode := ANode.NextSibling;
+  end;
+end;
+    
+  
+procedure TXMPData.CreateTags;
+var
+  stream: TStringStream;
+  node: TDOMNode;
+  nodeName: String;
+begin
+  FDoc.Free;
+  stream := TStringStream.Create(FData);
+  try
+    ReadXMLFile(FDoc, stream);
+  finally
+    stream.Free;
+  end;
+  
+  FTags.Clear;
+  try
+    node := FDoc.DocumentElement.FindNode('rdf:RDF');
+    if node = nil then exit;
+    node := node.FirstChild;
+    while node <> nil do 
+    begin
+      nodeName := node.NodeName;
+      if nodeName = 'rdf:Description' then
+        Create_RDFDescription_Tags(node);
+      node := node.NextSibling;
+    end;
+  except
+    FTags.Clear;
+    FreeAndNil(FDoc);
+    raise;
+  end;
+end;
+{$ENDIF}
+
+function TXMPData.GetTagByIndex(AIndex: Integer):  String;
+begin
+  Result := FTags[AIndex];
+end;
+
+function TXMPData.GetTagByName(ATagName: String): String;
+begin
+  Result := FTags.Values[ATagName];;
+end;
+
+function TXMPData.GetTagCount: Integer;
+begin
+  Result := FTags.Count;
+end;
+
+procedure TXMPData.ReadFromStream(AStream: TStream; ASize: Integer = -1);
+var
+  p: Int64;
+begin
+  if ASize = -1 then 
+    ASize := AStream.Size;
+  SetLength(FData, ASize);
+  p := AStream.Position;
+  AStream.Read(FData[1], ASize);
+  
+  AStream.Position := p;
+  {$IFDEF FPC}
+  CreateTags;
+  {$ENDIF}
+end;
+
+procedure TXMPData.SaveToStream(AStream: TStream);
+begin
+  if FData <> '' then
+    AStream.Write(FData[1], Length(FData));
+end;
+
+end.
+