Extract most of the mutable state of SkShader into a separate Context object.

src/effects/gradients/SkTwoPointRadialGradient.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
  #include "SkTwoPointRadialGradient.h"
 
@@ skipping 202 matching lines @@
     if (info) {
         commonAsAGradient(info);
         info->fPoint[0] = fCenter1;
         info->fPoint[1] = fCenter2;
         info->fRadius[0] = fRadius1;
         info->fRadius[1] = fRadius2;
     }
     return kRadial2_GradientType;
 }
 
+#if 0
 void SkTwoPointRadialGradient::shadeSpan(int x, int y, SkPMColor* dstCParam,
                                          int count) {
     SkASSERT(count > 0);
 
     SkPMColor* SK_RESTRICT dstC = dstCParam;
 
     // Zero difference between radii:  fill with transparent black.
     if (fDiffRadius == 0) {
       sk_bzero(dstC, count * sizeof(*dstC));
       return;
@@ skipping 66 matching lines @@
     }
 
     if (!this->INHERITED::setContext(device, paint, matrix)) {
         return false;
     }
 
     // we don't have a span16 proc
     fFlags &= ~kHasSpan16_Flag;
     return true;
 }
+#endif
 
 #ifdef SK_DEVELOPER
 void SkTwoPointRadialGradient::toString(SkString* str) const {
     str->append("SkTwoPointRadialGradient: (");
 
     str->append("center1: (");
     str->appendScalar(fCenter1.fX);
     str->append(", ");
     str->appendScalar(fCenter1.fY);
     str->append(") radius1: ");
@@ skipping 363 matching lines @@
 }
 
 #else
 
 GrEffectRef* SkTwoPointRadialGradient::asNewEffect(GrContext*, const SkPaint&) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return NULL;
 }
 
 #endif