Add support for blending of LCD for all blend modes.

src/gpu/GrProcOptInfo.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrProcOptInfo.h"
 
 #include "GrGeometryProcessor.h"
@@ skipping 33 matching lines @@
     GrInitInvariantOutput out;
     primProc->getInvariantOutputCoverage(&out);
     fInOut.reset(out);
     this->internalCalc(processors, cnt, primProc->willReadFragmentPosition());
 }
 
 void GrProcOptInfo::calcWithInitialValues(const GrFragmentProcessor * const processors[],
                                           int cnt,
                                           GrColor startColor,
                                           GrColorComponentFlags flags,
-                                          bool areCoverageStages) {
+                                          bool areCoverageStages,
+                                          bool isLCD) {
     GrInitInvariantOutput out;
     out.fIsSingleComponent = areCoverageStages;
     out.fColor = startColor;
     out.fValidFlags = flags;
+    out.fIsLCDCoverage = isLCD;
     fInOut.reset(out);
     this->internalCalc(processors, cnt, false);
 }
 
 void GrProcOptInfo::internalCalc(const GrFragmentProcessor* const processors[],
                                  int cnt,
                                  bool initWillReadFragmentPosition) {
     fFirstEffectiveProcessorIndex = 0;
     fInputColorIsUsed = true;
     fInputColor = fInOut.color();
@@ skipping 18 matching lines @@
             fInputColor = fInOut.color();
             fInputColorIsUsed = true;
             // Since we are clearing all previous color stages we are in a state where we have found
             // zero stages that don't multiply the inputColor.
             fInOut.resetNonMulStageFound();
             // Reset these since we don't care if previous stages read these values
             fReadsFragPosition = initWillReadFragmentPosition;
         }
     }
 }