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

experimental/PdfViewer/SkPdfDeviceNColorSpaceDictionary_autogen.h

 #ifndef __DEFINED__SkPdfDeviceNColorSpaceDictionary
 #define __DEFINED__SkPdfDeviceNColorSpaceDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Entry in a DeviceN color space attributes dictionary
 class SkPdfDeviceNColorSpaceDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kDeviceNColorSpaceDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kDeviceNColorSpaceDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfDeviceNColorSpaceDictionary* asDeviceNColorSpaceDictionary() {return this;}
   virtual const SkPdfDeviceNColorSpaceDictionary* asDeviceNColorSpaceDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfDeviceNColorSpaceDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfDeviceNColorSpaceDictionary& operator=(const SkPdfDeviceNColorSpaceDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Optional) A dictionary describing the individual colorants used in the DeviceN
+ *  color space. For each entry in this dictionary, the key is a colorant name and the
+ *  value is an array defining a Separation color space for that colorant (see "Separa-
+ *  tion Color Spaces" on page 201). The key must match the colorant name given in
+ *  that color space. The dictionary need not list all colorants used in the DeviceN
+ *  color space and may list additional colorants.
+ *  This dictionary has no effect on the operation of the DeviceN color space itself or
+ *  the appearance that it produces. However, it provides information about the indi-
+ *  vidual colorants that may be useful to some applications. In particular, the alter-
+ *  nate color space and tint transformation function of a Separation color space
+ *  describe the appearance of that colorant alone, whereas those of a DeviceN color
+ *  space describe only the appearance of its colorants in combination.
+**/
+  bool has_Colorants() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Colorants", "", NULL));
+  }
+
   SkPdfDictionary* Colorants() const {
     SkPdfDictionary* ret;
     if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Colorants", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return NULL;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfDeviceNColorSpaceDictionary