Add a GrPathRange class

src/gpu/GrStencilAndCoverTextContext.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 GrStencilAndCoverTextContext_DEFINED
 #define GrStencilAndCoverTextContext_DEFINED
 
@@ skipping 18 matching lines @@
                           size_t byteLength,
                           SkScalar x, SkScalar y) SK_OVERRIDE;
     virtual void drawPosText(const GrPaint&, const SkPaint&,
                              const char text[], size_t byteLength,
                              const SkScalar pos[], SkScalar constY,
                              int scalarsPerPosition) SK_OVERRIDE;
 
     virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE;
 
 private:
+    class GlyphPathRange;
+    static const int kGlyphBufferSize = 1024;
+
     void init(const GrPaint&, const SkPaint&, size_t textByteLength);
-    void appendGlyph(GrGlyph::PackedID, const SkPoint&,
-                     GrTextStrike*, GrFontScaler*);
+    void initGlyphs(SkGlyphCache* cache);
+    void appendGlyph(uint16_t glyphID, float x, float y);
+    void flush();
     void finish();
 
     GrDrawState::AutoRestoreEffects fStateRestore;
     SkScalar fTextRatio;
     SkStrokeRec fStroke;
-    SkTDArray<const GrPath*> fPaths;
-    SkTDArray<SkMatrix> fTransforms;
-    SkPath fTmpPath;
+    SkGlyphCache* fGlyphCache;
+    GlyphPathRange* fGlyphs;
+    uint32_t fIndexBuffer[kGlyphBufferSize];
+    float fTransformBuffer[6 * kGlyphBufferSize];
+    int fPendingGlyphCount;
     SkMatrix fGlyphTransform;
     bool fNeedsDeviceSpaceGlyphs;
 };
 
 #endif