SkPDF: Subset Type3 (fallback) font

src/pdf/SkPDFDevice.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPDFDevice_DEFINED
 #define SkPDFDevice_DEFINED
 
@@ skipping 273 matching lines @@
 
     void populateGraphicStateEntryFromPaint(const SkMatrix& matrix,
                                             const SkClipStack& clipStack,
                                             const SkRegion& clipRegion,
                                             const SkPaint& paint,
                                             bool hasText,
                                             GraphicStateEntry* entry);
     int addGraphicStateResource(SkPDFObject* gs);
     int addXObjectResource(SkPDFObject* xObject);
 
-    void updateFont(const SkPaint& paint, uint16_t glyphID, ContentEntry* contentEntry);
+    // returns false when a valid SkFont can not be produced
+    bool updateFont(const SkPaint& paint, uint16_t glyphID, ContentEntry* contentEntry);
     int getFontResourceIndex(SkTypeface* typeface, uint16_t glyphID);
 
     void internalDrawPaint(const SkPaint& paint, ContentEntry* contentEntry);
 
     void internalDrawImage(const SkMatrix& origMatrix,
                            const SkClipStack* clipStack,
                            const SkRegion& origClipRegion,
                            SkImageBitmap imageBitmap,
                            const SkPaint& paint);
 
     bool handleInversePath(const SkDraw& d, const SkPath& origPath,
                            const SkPaint& paint, bool pathIsMutable,
                            const SkMatrix* prePathMatrix = nullptr);
     void handlePointAnnotation(const SkPoint&, const SkMatrix&, const char key[], SkData* value);
     void handlePathAnnotation(const SkPath&, const SkDraw& d, const char key[], SkData* value);
 
     typedef SkBaseDevice INHERITED;
 
     // TODO(edisonn): Only SkDocument_PDF and SkPDFImageShader should be able to create
     // an SkPDFDevice
     //friend class SkDocument_PDF;
     //friend class SkPDFImageShader;
 };
 
 #endif