guard rasterizer and drawlooper setters

gm/texteffects.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 "gm.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 70 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);
 }
 
 #include "Sk2DPathEffect.h"
 
 static sk_sp<SkPathEffect> MakeDotEffect(SkScalar radius, const SkMatrix& matrix) {
     SkPath path;
     path.addCircle(0, 0, radius);
     return SkPath2DPathEffect::Make(matrix, path);
@@ skipping 44 matching lines @@
 typedef void (*raster_proc)(SkLayerRasterizer::Builder*, SkPaint&);
 
 static const raster_proc gRastProcs[] = {
     r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
 };
 
 #include "SkXfermode.h"
 
 static void apply_shader(SkPaint* paint, int index) {
     raster_proc proc = gRastProcs[index];
-    if (proc)
-    {
+    if (proc) {
         SkPaint p;
         SkLayerRasterizer::Builder rastBuilder;
 
         p.setAntiAlias(true);
         proc(&rastBuilder, p);
-        paint->setRasterizer(rastBuilder.detachRasterizer())->unref();
+        paint->setRasterizer(rastBuilder.detach());
     }
 
 #if 0
     SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 };
     paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref();
 #endif
     paint->setColor(SK_ColorBLUE);
 }
 
 DEF_SIMPLE_GM(texteffects, canvas, 460, 680) {
@@ skipping 207 matching lines @@
 
         SkScalar start = textPt.fX;
         SkScalar end = posX;
         SkScalar uPos = pos[0].fY + uWidth;
         SkPath underline = create_underline(intersections, start, end, uPos, uWidth, textSize);
         paint.setStyle(SkPaint::kStroke_Style);
         canvas->drawPath(underline, paint);
         canvas->translate(0, textSize * 1.3f);
     }
 }