Improve PdfName conformance

@@ -315,7 +315,27 @@ class PdfName extends PdfDataType {
   @override
   @override
   void output(PdfStream s) {
   void output(PdfStream s) {
     assert(value[0] == '/');
     assert(value[0] == '/');
-    s.putString(value);
+    final bytes = <int>[];
+    for (final c in value.codeUnits) {
+      assert(c < 0xff && c > 0x00);
+
+      if (c < 0x21 ||
+          c > 0x7E ||
+          c == 0x23 ||
+          (c == 0x2f && bytes.isNotEmpty) ||
+          c == 0x5b ||
+          c == 0x5d ||
+          c == 0x28 ||
+          c == 0x3c ||
+          c == 0x3e) {
+        bytes.add(0x23);
+        final x = c.toRadixString(16).padLeft(2, '0');
+        bytes.addAll(x.codeUnits);
+      } else {
+        bytes.add(c);
+      }
+    }
+    s.putBytes(bytes);
   }
   }
 }
 }
 
 

@@ -25,6 +25,12 @@ void main() {
     expect(const PdfBool(false).toString(), 'false');
     expect(const PdfBool(false).toString(), 'false');
   });
   });
 
 
+  test('PdfDataTypes Name ', () {
+    expect(const PdfName('/Test').toString(), '/Test');
+    expect(const PdfName('/Type 1').toString(), '/Type#201');
+    expect(const PdfName('/Num#1').toString(), '/Num#231');
+  });
+
   test('PdfDataTypes Num', () {
   test('PdfDataTypes Num', () {
     expect(const PdfNum(0).toString(), '0');
     expect(const PdfNum(0).toString(), '0');
     expect(const PdfNum(.5).toString(), '0.5');
     expect(const PdfNum(.5).toString(), '0.5');