Decouple contrast boost from fake gamma.

src/gpu/text/GrAtlasTextContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAtlasTextContext_DEFINED
 #define GrAtlasTextContext_DEFINED
 
@@ skipping 34 matching lines @@
     void drawTextBlob(GrContext*, GrDrawContext*, const GrClip&, const SkPaint&,
                       const SkMatrix& viewMatrix, const SkSurfaceProps&, const SkTextBlob*,
                       SkScalar x, SkScalar y,
                       SkDrawFilter*, const SkIRect& clipBounds);
 
 private:
     GrAtlasTextContext();
 
     // sets up the descriptor on the blob and returns a detached cache.  Client must attach
     inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd);
-    // Determines if we need to use FakeGamma:
-    inline static SkPaint::FakeGamma ComputeFakeGamma(GrDrawContext*, const GrPaint&);
+    // Determines if we need to use fake gamma (and contrast boost):
+    inline static uint32_t ComputeScalerContextFlags(GrDrawContext*, const GrPaint&);
     static void RegenerateTextBlob(GrAtlasTextBlob* bmp,
                                    GrBatchFontCache*,
                                    const GrShaderCaps&,
-                                   const SkPaint& skPaint, GrColor, SkPaint::FakeGamma,
+                                   const SkPaint& skPaint, GrColor,
+                                   uint32_t scalerContextFlags,
                                    const SkMatrix& viewMatrix,
                                    const SkSurfaceProps&,
                                    const SkTextBlob* blob, SkScalar x, SkScalar y,
                                    SkDrawFilter* drawFilter);
     inline static bool HasLCD(const SkTextBlob*);
 
     static inline GrAtlasTextBlob* CreateDrawTextBlob(GrTextBlobCache*,
                                                       GrBatchFontCache*, const GrShaderCaps&,
                                                       const GrPaint&,
-                                                      const SkPaint&, SkPaint::FakeGamma,
+                                                      const SkPaint&,
+                                                      uint32_t scalerContextFlags,
                                                       const SkMatrix& viewMatrix,
                                                       const SkSurfaceProps&,
                                                       const char text[], size_t byteLength,
                                                       SkScalar x, SkScalar y);
     static inline GrAtlasTextBlob* CreateDrawPosTextBlob(GrTextBlobCache*, GrBatchFontCache*,
                                                          const GrShaderCaps&,
                                                          const GrPaint&,
-                                                         const SkPaint&, SkPaint::FakeGamma,
+                                                         const SkPaint&,
+                                                         uint32_t scalerContextFlags,
                                                          const SkMatrix& viewMatrix,
                                                          const SkSurfaceProps&,
                                                          const char text[], size_t byteLength,
                                                          const SkScalar pos[],
                                                          int scalarsPerPosition,
                                                          const SkPoint& offset);
     const GrDistanceFieldAdjustTable* dfAdjustTable() const { return fDistanceAdjustTable; }
 
     SkAutoTUnref<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
 
 #ifdef GR_TEST_UTILS
-    static const SkPaint::FakeGamma kTextBlobBatchFakeGamma = SkPaint::FakeGamma::On;
+    static const uint32_t kTextBlobBatchScalerContextFlags =
+        SkPaint::kFakeGammaAndBoostContrast_ScalerContextFlags;
     DRAW_BATCH_TEST_FRIEND(TextBlobBatch);
 #endif
 };
 
 #endif