Fix handling of radii scaling to force the result to always be less

tests/ScaleToSidesTest.cpp

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkScaleToSides.h"
+
+#include <cfloat>
+#include "Test.h"
+
+DEF_TEST(ScaleToSides, reporter) {
+    float interestingValues[] = {
+        0.0f,
+        0.5f,
+        1.0f,
+        2.0f,
+        3.0f,
+        33.0f,
+        33554430.0f,
+        33554431.0f,
+        33554464.0f,
+        333333332.0f,
+        333333333.0f,
+        333333334.0f,
+        FLT_MAX,
+        FLT_EPSILON,
+        FLT_MIN
+    };
+
+    int numInterestingValues = (int)SK_ARRAY_COUNT(interestingValues);
+
+    for (int i = 0; i < numInterestingValues; i++) {
+        for (int j = 0; j < numInterestingValues; j++) {
+            for (int k = 0; k < numInterestingValues; k++) {
+                float radius1 = interestingValues[i];
+                float radius2 = interestingValues[j];
+                float width = interestingValues[k];
+                if (width > 0.0f) {
+                    double scale = (double)width / ((double)radius1 + (double)radius2);
+                    if (scale < 1.0) {
+                        ScaleToSides::AdjustRadii(width, scale, &radius1, &radius2);
+                    }
+                }
+            }
+        }
+    }
+}