Tweak distance field path renderer behavior in gamma-correct mode

src/gpu/GrPathRenderer.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 GrPathRenderer_DEFINED
 #define GrPathRenderer_DEFINED
 
@@ skipping 101 matching lines @@
      * Args to drawPath()
      *
      * fTarget                The target that the path will be rendered to
      * fResourceProvider      The resource provider for creating gpu resources to render the path
      * fPipelineBuilder       The pipelineBuilder
      * fColor                 Color to render with
      * fViewMatrix            The viewMatrix
      * fPath                  the path to draw.
      * fStroke                the stroke information (width, join, cap)
      * fAntiAlias             true if anti-aliasing is required.
+     * fGammaCorrect          true if gamma-correct rendering is to be used.
      */
     struct DrawPathArgs {
         GrDrawTarget*               fTarget;
         GrResourceProvider*         fResourceProvider;
         GrPipelineBuilder*          fPipelineBuilder;
         GrColor                     fColor;
         const SkMatrix*             fViewMatrix;
         const SkPath*               fPath;
         const GrStrokeInfo*         fStroke;
         bool                        fAntiAlias;
+        bool                        fGammaCorrect;
 
         void validate() const {
             SkASSERT(fTarget);
             SkASSERT(fResourceProvider);
             SkASSERT(fPipelineBuilder);
             SkASSERT(fViewMatrix);
             SkASSERT(fPath);
             SkASSERT(fStroke);
             SkASSERT(!fPath->isEmpty());
         }
@@ skipping 132 matching lines @@
         args.fPipelineBuilder->setDisableColorXPFactory();
         DrawPathArgs drawArgs;
         drawArgs.fTarget = args.fTarget;
         drawArgs.fResourceProvider = args.fResourceProvider;
         drawArgs.fPipelineBuilder = args.fPipelineBuilder;
         drawArgs.fColor = 0xFFFFFFFF;
         drawArgs.fViewMatrix = args.fViewMatrix;
         drawArgs.fPath = args.fPath;
         drawArgs.fStroke = args.fStroke;
         drawArgs.fAntiAlias = false;
+        drawArgs.fGammaCorrect = false;
         this->drawPath(drawArgs);
     }
 
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif