Fix SkTwoPointConicalGradient zero-radius handling

r == 0 is within valid gradient range, we shouldn't skip it.

BUG=skia:5023
R=caryclark@google.com,reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1756573002

Review URL: https://codereview.chromium.org/1756573002

1 files changed, 2 insertions, 2 deletions

diff --git a/src/effects/gradients/SkTwoPointConicalGradient.cpp b/src/effects/gradients/SkTwoPointConicalGradient.cpp
index b938ebdec7..2209306fe3 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient.cpp
@@ -122,10 +122,10 @@ SkFixed TwoPtRadialContext::nextT() {
     // find_quad_roots returns the values sorted, so we start with the last
     float t = roots[countRoots - 1];
     float r = lerp(fRec.fRadius, fRec.fDRadius, t);
-    if (r <= 0) {
+    if (r < 0) {
         t = roots[0];   // might be the same as roots[countRoots-1]
         r = lerp(fRec.fRadius, fRec.fDRadius, t);
-        if (r <= 0) {
+        if (r < 0) {
             return TwoPtRadial::kDontDrawT;
         }
     }