guard rasterizer and drawlooper setters

samplecode/SampleAll.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "SkBlurMask.h"
 #include "SkCanvas.h"
@@ skipping 134 matching lines @@
     p.setXfermodeMode(SkXfermode::kSrcOut_Mode);
     rastBuilder->addLayer(p);
 }
 
 static void r6(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     rastBuilder->addLayer(p);
 
     p.setAntiAlias(false);
     SkLayerRasterizer::Builder rastBuilder2;
     r5(&rastBuilder2, p);
-    p.setRasterizer(rastBuilder2.detachRasterizer())->unref();
+    p.setRasterizer(rastBuilder2.detach());
     p.setXfermodeMode(SkXfermode::kClear_Mode);
     rastBuilder->addLayer(p);
 }
 
 class Dot2DPathEffect : public Sk2DPathEffect {
 public:
     Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix)
         : Sk2DPathEffect(matrix), fRadius(radius) {}
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
@@ skipping 73 matching lines @@
 };
 
 static void apply_shader(SkPaint* paint, int index) {
     raster_proc proc = gRastProcs[index];
     if (proc) {
         SkPaint p;
         SkLayerRasterizer::Builder rastBuilder;
 
         p.setAntiAlias(true);
         proc(&rastBuilder, p);
-        paint->setRasterizer(rastBuilder.detachRasterizer())->unref();
+        paint->setRasterizer(rastBuilder.detach());
     }
 
 #if 1
     SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 };
     paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(
                 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3)), dir,
                 SK_Scalar1/4, SkIntToScalar(4)))->unref();
     paint->setColor(SK_ColorBLUE);
 #endif
 }
@@ skipping 303 matching lines @@
 private:
     SkPoint fClickPt;
     SkBitmap fBug, fTb, fTx;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DemoView; }
 static SkViewRegister reg(MyFactory);