Gradient shaders: make fPtsToUnit const, pre-cache getType().

src/effects/gradients/SkTwoPointConicalGradient.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 "SkTwoPointConicalGradient.h"
 #include "SkTwoPointConicalGradient_gpu.h"
 
@@ skipping 168 matching lines @@
         } else {
             SkFixed index = mirror_tileproc(t);
             SkASSERT(index <= 0xFFFF);
             *dstC++ = cache[toggle +
                             (index >> SkGradientShaderBase::kCache32Shift)];
         }
         toggle = next_dither_toggle(toggle);
     }
 }
 
-void SkTwoPointConicalGradient::init() {
-    fRec.init(fCenter1, fRadius1, fCenter2, fRadius2, fFlippedGrad);
-    fPtsToUnit.reset();
-}
-
 /////////////////////////////////////////////////////////////////////
 
 SkTwoPointConicalGradient::SkTwoPointConicalGradient(
         const SkPoint& start, SkScalar startRadius,
         const SkPoint& end, SkScalar endRadius,
         bool flippedGrad, const Descriptor& desc)
-    : SkGradientShaderBase(desc)
+    : SkGradientShaderBase(desc, SkMatrix::I())
     , fCenter1(start)
     , fCenter2(end)
     , fRadius1(startRadius)
     , fRadius2(endRadius)
     , fFlippedGrad(flippedGrad)
 {
     // this is degenerate, and should be caught by our caller
     SkASSERT(fCenter1 != fCenter2 || fRadius1 != fRadius2);
-    this->init();
+    fRec.init(fCenter1, fRadius1, fCenter2, fRadius2, fFlippedGrad);
 }
 
 bool SkTwoPointConicalGradient::isOpaque() const {
     // Because areas outside the cone are left untouched, we cannot treat the
     // shader as opaque even if the gradient itself is opaque.
     // TODO(junov): Compute whether the cone fills the plane crbug.com/222380
     return false;
 }
 
 size_t SkTwoPointConicalGradient::contextSize() const {
@@ skipping 215 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif