expose ConvertRadiusToSigma to aid clients in the API transition to sigma

src/effects/SkBlurMaskFilter.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
@@ skipping 10 matching lines @@
 #include "GrContext.h"
 #include "GrTexture.h"
 #include "GrEffect.h"
 #include "gl/GrGLEffect.h"
 #include "effects/GrSimpleTextureEffect.h"
 #include "GrTBackendEffectFactory.h"
 #include "SkGrPixelRef.h"
 #include "SkDraw.h"
 #endif
 
+SkScalar SkBlurMaskFilter::ConvertRadiusToSigma(SkScalar radius) {
+    return SkBlurMask::ConvertRadiusToSigma(radius);
+}
+
 class SkBlurMaskFilterImpl : public SkMaskFilter {
 public:
     SkBlurMaskFilterImpl(SkScalar sigma, SkBlurStyle, uint32_t flags);
 
     // overrides from SkMaskFilter
     virtual SkMask::Format getFormat() const SK_OVERRIDE;
     virtual bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&,
                             SkIPoint* margin) const SK_OVERRIDE;
 
 #if SK_SUPPORT_GPU
@@ skipping 1180 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END