New API for computing optimization invariants.

include/gpu/GrInvariantOutput.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 GrInvariantOutput_DEFINED
 #define GrInvariantOutput_DEFINED
 
@@ skipping 236 matching lines @@
     bool willUseInputColor() const { return fWillUseInputColor; }
 
     /**
      * If isSingleComponent is true, then the flag values for r, g, b, and a must all be the
      * same. If the flags are all set then all color components must be equal.
      */
     SkDEBUGCODE(void validate() const;)
 
 private:
     friend class GrProcOptInfo;
+    friend class GrPipelineBuilder;

[joshualitt, 2015/11/23 19:09:28]

Uneccessary

 
     /** Extracts the alpha channel and returns true if r,g,b == a. */
     static bool GetAlphaAndCheckSingleChannel(GrColor color, uint32_t* alpha) {
         *alpha = GrColorUnpackA(color);
         return *alpha == GrColorUnpackR(color) && *alpha == GrColorUnpackG(color) &&
                *alpha == GrColorUnpackB(color);
     }
 
     void reset(GrColor color, GrColorComponentFlags flags, bool isSingleComponent) {
         fColor = color;
@@ skipping 54 matching lines @@
     GrColorComponentFlags fValidFlags;
     bool fIsSingleComponent;
     bool fNonMulStageFound;
     bool fWillUseInputColor;
     bool fIsLCDCoverage; // Temorary data member until texture pixel configs are updated
 
 };
 
 #endif