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

experimental/PdfViewer/SkPdfType2ShadingDictionary_autogen.h

 #ifndef __DEFINED__SkPdfType2ShadingDictionary
 #define __DEFINED__SkPdfType2ShadingDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfShadingDictionary_autogen.h"
 
+// Additional entries specific to a type 2 shading dictionary
 class SkPdfType2ShadingDictionary : public SkPdfShadingDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kType2ShadingDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kType2ShadingDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfType2ShadingDictionary* asType2ShadingDictionary() {return this;}
   virtual const SkPdfType2ShadingDictionary* asType2ShadingDictionary() const {return this;}
 
 private:
   virtual SkPdfType1ShadingDictionary* asType1ShadingDictionary() {return NULL;}
@@ skipping 13 matching lines @@
 
 public:
 private:
 public:
   SkPdfType2ShadingDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfShadingDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfType2ShadingDictionary& operator=(const SkPdfType2ShadingDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Required) An array of four numbers [ x0 y0 x1 y1 ] specifying the starting and
+ *  ending coordinates of the axis, expressed in the shading's target coordinate
+ *  space.
+**/
+  bool has_Coords() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Coords", "", NULL));
+  }
+
   SkPdfArray Coords() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Coords", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfArray();
   }
 
+/** (Optional) An array of two numbers [ t0 t1 ] specifying the limiting values of a
+ *  parametric variable t. The variable is considered to vary linearly between these
+ *  two values as the color gradient varies between the starting and ending points of
+ *  the axis. The variable t becomes the input argument to the color function(s).
+ *  Default value: [0.0 1.0].
+**/
+  bool has_Domain() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Domain", "", NULL));
+  }
+
   SkPdfArray Domain() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Domain", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfArray();
   }
 
+/** (Required) A 1-in, n-out function or an array of n 1-in, 1-out functions (where n
+ *  is the number of color components in the shading dictionary's color space). The
+ *  function(s) are called with values of the parametric variable t in the domain de-
+ *  fined by the Domain entry. Each function's domain must be a superset of that of
+ *  the shading dictionary. If the value returned by the function for a given color
+ *  component is out of range, it will be adjusted to the nearest valid value.
+**/
+  bool has_Function() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Function", "", NULL));
+  }
+
   SkPdfFunction Function() const {
     SkPdfFunction ret;
     if (FunctionFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Function", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfFunction();
   }
 
+/** (Optional) An array of two boolean values specifying whether to extend the
+ *  shading beyond the starting and ending points of the axis, respectively. Default
+ *  value: [false false].
+**/
+  bool has_Extend() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Extend", "", NULL));
+  }
+
   SkPdfArray Extend() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Extend", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfArray();
   }
 
 };
 
 #endif  // __DEFINED__SkPdfType2ShadingDictionary