commit dc66c42d7d48d76db7b54f3c864e74637777a176
author bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Apr 06 19:35:37 2011 +0000
committer bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Apr 06 19:35:37 2011 +0000
tree cb7146a483e2cca781f13345ed580f4bd3968ce1
parent 139d84b263e8927e2982bd74e40a7c4042ceb433

Fix Two Pt Radial when circles are concentric.

Review URL: http://codereview.appspot.com/4368047/



git-svn-id: http://skia.googlecode.com/svn/trunk@1069 2bbb7eff-a529-9590-31e7-b0007b416f81

src/effects/SkGradientShader.cpp

diff --git a/src/effects/SkGradientShader.cpp b/src/effects/SkGradientShader.cpp
index 3452212..dca87b0 100644
--- a/src/effects/SkGradientShader.cpp
+++ b/src/effects/SkGradientShader.cpp
@@ -1397,9 +1397,13 @@
                                  SkScalarSquare(fDiff.fY));
         }
         if (matrix) {
-            SkScalar invDiffL = SkScalarInvert(diffL);
-            matrix->setSinCos(-SkScalarMul(invDiffL, fDiff.fY),
-                              SkScalarMul(invDiffL, fDiff.fX));
+            if (diffL) {
+                SkScalar invDiffL = SkScalarInvert(diffL);
+                matrix->setSinCos(-SkScalarMul(invDiffL, fDiff.fY),
+                                  SkScalarMul(invDiffL, fDiff.fX));
+            } else {
+                matrix->reset();
+            }
             matrix->preConcat(fPtsToUnit);
         }
         if (xy) {