Missing resources crash SampleFilterQuality.

samplecode/SampleFilterQuality.cpp

 /*
  * Copyright 2015 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 "Resources.h"
@@ skipping 23 matching lines @@
         { bounds.right(), bounds.bottom() },
     };
     const SkColor colors[] = {
         SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK,
         SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW,
     };
     return SkGradientShader::CreateLinear(pts,
                                           colors, nullptr, SK_ARRAY_COUNT(colors),
                                           SkShader::kClamp_TileMode);
 #else
-    SkString resourcePath = GetResourcePath("mandrill_128.png");
-    SkAutoTUnref<SkData> data(SkData::NewFromFileName(resourcePath.c_str()));
-    SkAutoTUnref<SkImage> image(SkImage::NewFromEncoded(data));
+    SkAutoTUnref<SkImage> image(GetResourceAsImage("mandrill_128.png"));
+    if (nullptr == image) {
+        return nullptr;
+    }
     return image->newShader(SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
 #endif
 }
 
 #define N   128
 #define ANGLE_DELTA 3
 #define SCALE_DELTA (SK_Scalar1 / 32)
 
 static SkImage* make_image() {
     SkImageInfo info = SkImageInfo::MakeN32(N, N, kOpaque_SkAlphaType);
     SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
     SkCanvas* canvas = surface->getCanvas();
     canvas->drawColor(SK_ColorWHITE);
 
     SkPath path;
     path.setFillType(SkPath::kEvenOdd_FillType);
 
     path.addRect(SkRect::MakeWH(N/2, N));
     path.addRect(SkRect::MakeWH(N, N/2));
     path.moveTo(0, 0); path.lineTo(N, 0); path.lineTo(0, N); path.close();
 
     SkPaint paint;
-    paint.setShader(make_shader(SkRect::MakeWH(N, N)))->unref();
+    SkSafeUnref(paint.setShader(make_shader(SkRect::MakeWH(N, N))));
     
     canvas->drawPath(path, paint);
     return surface->newImageSnapshot();
 }
 
 static SkImage* zoom_up(SkSurface* origSurf, SkImage* orig) {
     const SkScalar S = 16;    // amount to scale up
     const int D = 2;    // dimension scaling for the offscreen
     // since we only view the center, don't need to produce the entire thing
     
@@ skipping 234 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new FilterQualityView; }
 static SkViewRegister reg(MyFactory);