Fix radii calculation code to handle large radii.

BUG=472147
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1569403002

Review URL: https://codereview.chromium.org/1569403002

1 files changed, 49 insertions, 0 deletions

diff --git a/tests/ScaleToSidesTest.cpp b/tests/ScaleToSidesTest.cpp
new file mode 100644
index 0000000000..60e82be529
--- /dev/null
+++ b/tests/ScaleToSidesTest.cpp
@@ -0,0 +1,49 @@
+/*
+ * 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);
+                    }
+                }
+            }
+        }
+    }
+}