Add more debugging for newly failing assert (DM on Xoom bots).

src/core/SkGeometry.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGeometry.h"
 #include "SkMatrix.h"
 
@@ skipping 84 matching lines @@
     }
 
     if (denom == 0 || numer == 0 || numer >= denom) {
         return 0;
     }
 
     SkScalar r = SkScalarDiv(numer, denom);
     if (SkScalarIsNaN(r)) {
         return 0;
     }
-    SkASSERT(r >= 0 && r < SK_Scalar1);
+    SkASSERTF(r >= 0 && r < SK_Scalar1, "numer %f, denom %f, r %f", numer, denom, r);

[tfarina, 2014/09/12 17:16:23]

lgtm (rubber-stamp).

     if (r == 0) { // catch underflow if numer <<<< denom
         return 0;
     }
     *ratio = r;
     return 1;
 }
 
 /** From Numerical Recipes in C.
 
     Q = -1/2 (B + sign(B) sqrt[B*B - 4*A*C])
@@ skipping 1343 matching lines @@
 }
 
 void SkConic::computeFastBounds(SkRect* bounds) const {
     bounds->set(fPts, 3);
 }
 
 bool SkConic::findMaxCurvature(SkScalar* t) const {
     // TODO: Implement me
     return false;
 }