Push sigma-based blur interface into our GMs/benches/tests/samplecode

tests/BlurTest.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 "Test.h"
 #include "SkBlurMaskFilter.h"
 #include "SkCanvas.h"
@@ skipping 77 matching lines @@
     return true;
 }
 
 static void test_blur(skiatest::Reporter* reporter) {
 
     SkPaint paint;
     paint.setColor(SK_ColorGRAY);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(SkIntToScalar(strokeWidth));
 
-    SkScalar radius = SkIntToScalar(5);
+    SkScalar sigma = SkFloatToScalar(3.38675f);
     for (int style = 0; style < SkBlurMaskFilter::kBlurStyleCount; ++style) {
         SkBlurMaskFilter::BlurStyle blurStyle =
             static_cast<SkBlurMaskFilter::BlurStyle>(style);
 
         const uint32_t flagPermutations = SkBlurMaskFilter::kAll_BlurFlag;
         for (uint32_t flags = 0; flags < flagPermutations; ++flags) {
             SkMaskFilter* filter;
-            filter = SkBlurMaskFilter::Create(radius, blurStyle, flags);
+            filter = SkBlurMaskFilter::Create(blurStyle, sigma, flags);
 
             paint.setMaskFilter(filter);
             filter->unref();
 
             for (size_t test = 0; test < SK_ARRAY_COUNT(tests); ++test) {
                 SkPath path;
                 tests[test].addPath(&path);
                 SkPath strokedPath;
                 paint.getFillPath(path, &strokedPath);
                 SkRect refBound = strokedPath.getBounds();
@@ skipping 23 matching lines @@
                     REPORTER_ASSERT(reporter,
                         compare(refBitmap, iref, testBitmap, itest));
                 }
             }
         }
     }
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("BlurMaskFilter", BlurTestClass, test_blur)