Pdfa 3b

pdf/lib/pdf.dart

@@ -37,6 +37,7 @@ export 'src/pdf/obj/outline.dart';
 export 'src/pdf/obj/page.dart';
 export 'src/pdf/obj/page_label.dart';
 export 'src/pdf/obj/pattern.dart';
+export 'src/pdf/obj/pdf_a_3b.dart';
 export 'src/pdf/obj/shading.dart';
 export 'src/pdf/obj/signature.dart';
 export 'src/pdf/obj/smask.dart';

pdf/lib/src/pdf/obj/annotation.dart

@@ -299,6 +299,12 @@ abstract class PdfAnnotBase {
     if (flags != null && flags!.isNotEmpty) {
       params['/F'] = PdfNum(flagValue);
     }
+    else {
+      // for pdfa compliance
+      params['/F'] = PdfNum(
+          4 // printable
+      );
+    }
 
     if (date != null) {
       params['/M'] = PdfString.fromDate(date!);

pdf/lib/src/pdf/obj/catalog.dart

@@ -26,6 +26,7 @@ import 'object.dart';
 import 'outline.dart';
 import 'page_label.dart';
 import 'page_list.dart';
+import 'pdf_a_3b.dart';
 
 /// Pdf Catalog object
 class PdfCatalog extends PdfObject<PdfDict> {
@@ -54,6 +55,12 @@ class PdfCatalog extends PdfObject<PdfDict> {
   /// The document metadata
   PdfMetadata? metadata;
 
+  /// Colorprofile output intent (Pdf/A)
+  PdfaColorProfile? colorProfile;
+
+  /// Attached files (Pdf/A 3b)
+  PdfaAttachedFiles? attached;
+
   /// The initial page mode
   final PdfPageMode? pageMode;
 
@@ -94,6 +101,12 @@ class PdfCatalog extends PdfObject<PdfDict> {
       params['/Names'] = names!.ref();
     }
 
+    // ??? what to do, if /Names is already occupied?
+    if (attached != null && attached!.isNotEmpty) {
+      params['/Names'] = attached!.catalogNames();
+      params['/AF'] = attached!.catalogAF();
+    }
+
     // the PageLabels object
     if (pageLabels != null && pageLabels!.labels.isNotEmpty) {
       params['/PageLabels'] = pageLabels!.ref();
@@ -148,5 +161,9 @@ class PdfCatalog extends PdfObject<PdfDict> {
         }
       }
     }
+
+    if (colorProfile != null) {
+      params['/OutputIntents'] = colorProfile!.outputIntents();
+    }
   }
 }

pdf/lib/src/pdf/obj/metadata.dart

@@ -45,7 +45,8 @@ class PdfMetadata extends PdfObject<PdfDictStream> {
   @override
   void prepare() {
     super.prepare();
-    params['/SubType'] = const PdfName('/XML');
+    params['/Type'] = const PdfName('/Metadata');
+    params['/Subtype'] = const PdfName('/XML');
     params.data = Uint8List.fromList(utf8.encode(metadata.toString()));
   }
 }