Deal with ca and CA transparency operators in pdf. add comments to generated classes.

experimental/PdfViewer/SkPdfType2FunctionDictionary_autogen.h

 #ifndef __DEFINED__SkPdfType2FunctionDictionary
 #define __DEFINED__SkPdfType2FunctionDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Additional entries specific to a type 2 function dictionary
 class SkPdfType2FunctionDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kType2FunctionDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kType2FunctionDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfType2FunctionDictionary* asType2FunctionDictionary() {return this;}
   virtual const SkPdfType2FunctionDictionary* asType2FunctionDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfType2FunctionDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfType2FunctionDictionary& operator=(const SkPdfType2FunctionDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Optional) An array of n numbers defining the function result when x = 0.0 (hence the "0"
+ *  in the name). Default value: [0.0].
+**/
+  bool has_C0() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "C0", "", NULL));
+  }
+
   SkPdfArray C0() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "C0", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfArray();
   }
 
+/** (Optional) An array of n numbers defining the function result when x = 1.0 (hence the "1"
+ *  in the name). Default value: [1.0].
+**/
+  bool has_C1() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "C1", "", NULL));
+  }
+
   SkPdfArray C1() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "C1", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfArray();
   }
 
+/** (Required) The interpolation exponent. Each input value x will return n values, given by
+ *  yj = C0j + xN x (C1j - C0j ), for 0 <= j < n.
+**/
+  bool has_N() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "N", "", NULL));
+  }
+
   double N() const {
     double ret;
     if (DoubleFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "N", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return 0;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfType2FunctionDictionary