Don't apply blur to zero-sized circles

Bug: skia:7452
Change-Id: I7aac621cba8519174d306d9d304aa72a07947f46
Reviewed-on: https://skia-review.googlesource.com/91444
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/effects/GrCircleBlurFragmentProcessor.cpp b/src/effects/GrCircleBlurFragmentProcessor.cpp
index 972d75b375..41ea482b9e 100644
--- a/src/effects/GrCircleBlurFragmentProcessor.cpp
+++ b/src/effects/GrCircleBlurFragmentProcessor.cpp
@@ -170,6 +170,9 @@ static sk_sp<GrTextureProxy> create_profile_texture(GrResourceProvider* resource
                                                     const SkRect& circle, float sigma,
                                                     float* solidRadius, float* textureRadius) {
     float circleR = circle.width() / 2.0f;
+    if (circleR < SK_ScalarNearlyZero) {
+        return nullptr;
+    }
     // Profile textures are cached by the ratio of sigma to circle radius and by the size of the
     // profile texture (binned by powers of 2).
     SkScalar sigmaToCircleRRatio = sigma / circleR;