commit 4c8c1e83022e5c7cd55bb70020c49c578d0d16e7
author Jim Van Verth <jvanverth@google.com> Mon Apr 23 17:14:48 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Tue Apr 24 21:53:06 2018 +0000
tree 28142ce77a4cef4056df0f16d07c165875929ea8
parent 058f2e6ed2921399879d987e3276f96e8c0cd70b

Minor shadow fixes.

Fix inset value for analytic shadows to get full inset (and hence
proper falloff).
Fix compute_radial_values in tessellator to return only positive values
and produce cleaner arcs.
Adjust shadow params in Android sample to match Android.
Fix corner calculation for analytic shadow.

Bug: skia:7486
Change-Id: Ib393b5d577f5a5eb89d3388aa4726ea4dae37055
Reviewed-on: https://skia-review.googlesource.com/123220
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

src/utils/SkShadowTessellator.cpp

diff --git a/src/utils/SkShadowTessellator.cpp b/src/utils/SkShadowTessellator.cpp
index 98c47a6..0bf1ada 100755
--- a/src/utils/SkShadowTessellator.cpp
+++ b/src/utils/SkShadowTessellator.cpp
@@ -121,7 +121,7 @@
     SkScalar rSin = v1.cross(v2);
     SkScalar theta = SkScalarATan2(rSin, rCos);
 
-    int steps = SkScalarFloorToInt(r*theta*kRecipPixelsPerArcSegment);
+    int steps = SkScalarRoundToInt(SkScalarAbs(r*theta*kRecipPixelsPerArcSegment));
 
     SkScalar dTheta = theta / steps;
     *rotSin = SkScalarSinCos(dTheta, rotCos);