Make SkFont a bit more useable

include/core/SkFont.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFont_DEFINED
 #define SkFont_DEFINED
 
@@ skipping 108 matching lines @@
 
     static sk_sp<SkFont> Make(sk_sp<SkTypeface>, SkScalar size, MaskType, uint32_t flags);
     static sk_sp<SkFont> Make(sk_sp<SkTypeface>, SkScalar size, SkScalar scaleX, SkScalar skewX,
                               MaskType, uint32_t flags);
 
     /**
      *  Return a font with the same attributes of this font, but with the specified size.
      *  If size is not supported (e.g. <= 0 or non-finite) NULL will be returned.
      */
     sk_sp<SkFont> makeWithSize(SkScalar size) const;
+    /**
+     *  Return a font with the same attributes of this font, but with the flags.
+     */
+    sk_sp<SkFont> makeWithFlags(uint32_t newFlags) const;
 
     SkTypeface* getTypeface() const { return fTypeface.get(); }
     SkScalar    getSize() const { return fSize; }
     SkScalar    getScaleX() const { return fScaleX; }
     SkScalar    getSkewX() const { return fSkewX; }
     uint32_t    getFlags() const { return fFlags; }
     MaskType    getMaskType() const { return (MaskType)fMaskType; }
 
     bool isVertical() const { return SkToBool(fFlags & kVertical_Flag); }
     bool isEmbolden() const { return SkToBool(fFlags & kEmbolden_Flag); }
     bool isEnableAutoHints() const { return SkToBool(fFlags & kEnableAutoHints_Flag); }
     bool isEnableByteCodeHints() const { return SkToBool(fFlags & kEnableByteCodeHints_Flag); }
     bool isUseNonLinearMetrics() const { return SkToBool(fFlags & kUseNonlinearMetrics_Flag); }
+    bool isDevKern() const { return SkToBool(fFlags & kDevKern_Flag); }
 
     int textToGlyphs(const void* text, size_t byteLength, SkTextEncoding,
                      uint16_t glyphs[], int maxGlyphCount) const;
 
+    int countText(const void* text, size_t byteLength, SkTextEncoding encoding) {
+        return this->textToGlyphs(text, byteLength, encoding, nullptr, 0);
+    }
+
     SkScalar measureText(const void* text, size_t byteLength, SkTextEncoding) const;
 
     static sk_sp<SkFont> Testing_CreateFromPaint(const SkPaint&);
 
 private:
     enum {
         kAllFlags = 0xFF,
     };
 
     SkFont(sk_sp<SkTypeface>, SkScalar size, SkScalar scaleX, SkScalar skewX, MaskType,
            uint32_t flags);
 
     sk_sp<SkTypeface> fTypeface;
     SkScalar    fSize;
     SkScalar    fScaleX;
     SkScalar    fSkewX;
     uint16_t    fFlags;
     uint8_t     fMaskType;
 //  uint8_t     fPad;
 };
 
 #endif