Implement an SkPaint-based image filter

samplecode/SampleFilterFuzz.cpp

Index: samplecode/SampleFilterFuzz.cpp
diff --git a/samplecode/SampleFilterFuzz.cpp b/samplecode/SampleFilterFuzz.cpp
index a0f7aff5ef3ac339d055be7f99d35aef8ed9412a..fc16da24cfdeaffaba73a603e06a773fc43db142 100644
--- a/samplecode/SampleFilterFuzz.cpp
+++ b/samplecode/SampleFilterFuzz.cpp
@@ -23,12 +23,12 @@
 #include "SkMergeImageFilter.h"
 #include "SkMorphologyImageFilter.h"
 #include "SkOffsetImageFilter.h"
+#include "SkPaintImageFilter.h"
 #include "SkPerlinNoiseShader.h"
 #include "SkPictureImageFilter.h"
 #include "SkPictureRecorder.h"
 #include "SkPoint3.h"
 #include "SkRandom.h"
-#include "SkRectShaderImageFilter.h"
 #include "SkTestImageFilters.h"
 #include "SkTileImageFilter.h"
 #include "SkView.h"
@@ -372,9 +372,11 @@ static SkImageFilter* make_image_filter(bool canBeNull = true) {
                 make_scalar(true), make_scalar(true), R(10.0f), make_scalar()) :
             SkPerlinNoiseShader::CreateTurbulence(
                 make_scalar(true), make_scalar(true), R(10.0f), make_scalar()));
+        SkPaint paint;
+        paint.setShader(shader);

[sugoi1, 2016/01/04 16:31:15]

You should really try to randomly use all the API functions of SkPaint that
changes its internal data (not just setShader()). It might be a lot, but you
won't have a good idea of how the deserialization reacts to these various states
without explicitly trying them out.

[ajuma, 2016/01/04 22:39:46]

Added a test case below.

         SkImageFilter::CropRect cropR(SkRect::MakeWH(SkIntToScalar(kBitmapSize),
                                                      SkIntToScalar(kBitmapSize)));
-        filter = SkRectShaderImageFilter::Create(shader, &cropR);
+        filter = SkPaintImageFilter::Create(paint, &cropR);
     }
         break;
     case DROP_SHADOW: