Merge "Fix SF blur to be as blurry as Gaussian blur" into sc-dev am: e78acd5b6a am: 43a39d1852

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15164243

Change-Id: I98f629f4074bd3a02c00ea920572a87eea1d456c
diff --git a/libs/renderengine/skia/filters/BlurFilter.cpp b/libs/renderengine/skia/filters/BlurFilter.cpp
index 4ad6e94..7c5bee9 100644
--- a/libs/renderengine/skia/filters/BlurFilter.cpp
+++ b/libs/renderengine/skia/filters/BlurFilter.cpp
@@ -81,7 +81,7 @@
     // Kawase is an approximation of Gaussian, but it behaves differently from it.
     // A radius transformation is required for approximating them, and also to introduce
     // non-integer steps, necessary to smoothly interpolate large radii.
-    float tmpRadius = (float)blurRadius / 6.0f;
+    float tmpRadius = (float)blurRadius / 2.0f;
     float numberOfPasses = std::min(kMaxPasses, (uint32_t)ceil(tmpRadius));
     float radiusByPasses = tmpRadius / (float)numberOfPasses;