Made shadows blurry (thru implementing variance mapping)

gm/shadowmaps.cpp

Index: gm/shadowmaps.cpp
diff --git a/gm/shadowmaps.cpp b/gm/shadowmaps.cpp
index b343d9b142221b60379c52901808e317462838d2..ee2d88f89049f9da9f928fd35c869d0a7b389788 100644
--- a/gm/shadowmaps.cpp
+++ b/gm/shadowmaps.cpp
@@ -76,6 +76,11 @@ public:
                                     SkVector3::Make(0.1f, 0.2f, 1.0f)));
         builder.add(SkLights::Light(SkColor3f::Make(0.4f, 0.4f, 0.4f)));
         fLights = builder.finish();
+
+        fShadowParams.fShadowRadius = 4.0f;
+        fShadowParams.fBiasingConstant = 0.3f;
+        fShadowParams.fMinVariance = 1024;

[robertphillips, 2016/08/16 15:58:16]

fShadowType -> fType ?

[vjiaoblack, 2016/08/16 16:48:21]

Done.

+        fShadowParams.fShadowType = SkShadowParams::kVariance_BlurAlgorithm;
     }
 
 protected:
@@ -95,11 +100,12 @@ protected:
         // It's used to generate the depth maps.
         sk_sp<SkPicture> pic(make_test_picture(kWidth, kHeight));
         canvas->setLights(fLights);
-        canvas->drawShadowedPicture(pic, nullptr, nullptr);
+        canvas->drawShadowedPicture(pic, nullptr, nullptr, fShadowParams);
     }
 
 private:
     sk_sp<SkLights> fLights;

[robertphillips, 2016/08/16 15:58:16]

line up ?

[vjiaoblack, 2016/08/16 16:48:21]

Done.

+    SkShadowParams fShadowParams;
     typedef GM INHERITED;
 };