Add flag to gradients to interpolate colors in premul space. Experimental API to encapsulate the sh…

src/effects/gradients/SkSweepGradient.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 "SkSweepGradient.h"
 
 SkSweepGradient::SkSweepGradient(SkScalar cx, SkScalar cy,
                                  const Descriptor& desc)
-: SkGradientShaderBase(desc),
-  fCenter(SkPoint::Make(cx, cy))
+    : SkGradientShaderBase(desc)
+    , fCenter(SkPoint::Make(cx, cy))
 {
     fPtsToUnit.setTranslate(-cx, -cy);
 
     // overwrite the tilemode to a canonical value (since sweep ignores it)
     fTileMode = SkShader::kClamp_TileMode;
 }
 
 SkShader::BitmapType SkSweepGradient::asABitmap(SkBitmap* bitmap,
     SkMatrix* matrix, SkShader::TileMode* xy) const {
     if (bitmap) {
@@ skipping 483 matching lines @@
     str->appendScalar(fCenter.fX);
     str->append(", ");
     str->appendScalar(fCenter.fY);
     str->append(") ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif