GrFP can express distance vector field req., program builder declares variable for it

src/gpu/GrPipeline.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 GrPipeline_DEFINED
 #define GrPipeline_DEFINED
 
@@ skipping 142 matching lines @@
     const GrScissorState& getScissorState() const { return fScissorState; }
 
     bool isHWAntialiasState() const { return SkToBool(fFlags & kHWAA_Flag); }
     bool snapVerticesToPixelCenters() const { return SkToBool(fFlags & kSnapVertices_Flag); }
     bool getDisableOutputConversionToSRGB() const {
         return SkToBool(fFlags & kDisableOutputConversionToSRGB_Flag);
     }
     bool getAllowSRGBInputs() const {
         return SkToBool(fFlags & kAllowSRGBInputs_Flag);
     }
+    bool usesDistanceVectorField() const {
+        return SkToBool(fFlags & kUsesDistanceVectorField_Flag);
+    }
     bool hasStencilClip() const {
         return SkToBool(fFlags & kHasStencilClip_Flag);
     }
 
     GrXferBarrierType xferBarrierType(const GrCaps& caps) const {
         return this->getXferProcessor().xferBarrierType(fRenderTarget.get(), caps);
     }
 
     /**
      * Gets whether the target is drawing clockwise, counterclockwise,
@@ skipping 26 matching lines @@
      * blend coeffs will represent those used by backend API.
      */
     void setOutputStateInfo(const GrPipelineBuilder& ds, GrXferProcessor::OptFlags,
                             const GrCaps&);
 
     enum Flags {
         kHWAA_Flag                          = 0x1,
         kSnapVertices_Flag                  = 0x2,
         kDisableOutputConversionToSRGB_Flag = 0x4,
         kAllowSRGBInputs_Flag               = 0x8,
-        kHasStencilClip_Flag                = 0x10
+        kUsesDistanceVectorField_Flag       = 0x10,
+        kHasStencilClip_Flag                = 0x20,
     };
 
     typedef GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> RenderTarget;
     typedef GrPendingProgramElement<const GrFragmentProcessor> PendingFragmentProcessor;
     typedef SkAutoSTArray<8, PendingFragmentProcessor> FragmentProcessorArray;
     typedef GrPendingProgramElement<const GrXferProcessor> ProgramXferProcessor;
     RenderTarget                        fRenderTarget;
     GrScissorState                      fScissorState;
     GrStencilSettings                   fStencilSettings;
     GrDrawFace                          fDrawFace;
     uint32_t                            fFlags;
     ProgramXferProcessor                fXferProcessor;
     FragmentProcessorArray              fFragmentProcessors;
     bool                                fIgnoresCoverage;
 
     // This value is also the index in fFragmentProcessors where coverage processors begin.
     int                                 fNumColorProcessors;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif