harden and speed up path op unit tests

tests/PathOpsTestCommon.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "PathOpsTestCommon.h"
+#include "SkPathOpsBounds.h"
 #include "SkPathOpsCubic.h"
+#include "SkPathOpsLine.h"
+#include "SkPathOpsQuad.h"
+#include "SkPathOpsTriangle.h"
 
 void CubicToQuads(const SkDCubic& cubic, double precision, SkTArray<SkDQuad, true>& quads) {
     SkTArray<double, true> ts;
     cubic.toQuadraticTs(precision, &ts);
     if (ts.count() <= 0) {
         SkDQuad quad = cubic.toQuad();
         quads.push_back(quad);
         return;
     }
     double tStart = 0;
     for (int i1 = 0; i1 <= ts.count(); ++i1) {
         const double tEnd = i1 < ts.count() ? ts[i1] : 1;
         SkDCubic part = cubic.subDivide(tStart, tEnd);
         SkDQuad quad = part.toQuad();
         quads.push_back(quad);
         tStart = tEnd;
     }
 }
+
+static bool SkDoubleIsNaN(double x) {
+    return x != x;
+}
+
+bool ValidBounds(const SkPathOpsBounds& bounds) {
+    if (SkScalarIsNaN(bounds.fLeft)) {
+        return false;
+    }
+    if (SkScalarIsNaN(bounds.fTop)) {
+        return false;
+    }
+    if (SkScalarIsNaN(bounds.fRight)) {
+        return false;
+    }
+    return !SkScalarIsNaN(bounds.fBottom);
+}
+
+bool ValidCubic(const SkDCubic& cubic) {
+    for (int index = 0; index < 4; ++index) {
+        if (!ValidPoint(cubic[index])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ValidLine(const SkDLine& line) {
+    for (int index = 0; index < 2; ++index) {
+        if (!ValidPoint(line[index])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ValidPoint(const SkDPoint& pt) {
+    if (SkDoubleIsNaN(pt.fX)) {
+        return false;
+    }
+    return !SkDoubleIsNaN(pt.fY);  
+}
+
+bool ValidPoints(const SkPoint* pts, int count) {
+    for (int index = 0; index < count; ++index) {
+        if (SkScalarIsNaN(pts[index].fX)) {
+            return false;
+        }
+        if (SkScalarIsNaN(pts[index].fY)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ValidQuad(const SkDQuad& quad) {
+    for (int index = 0; index < 3; ++index) {
+        if (!ValidPoint(quad[index])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ValidTriangle(const SkDTriangle& triangle) {
+    for (int index = 0; index < 3; ++index) {
+        if (!ValidPoint(triangle.fPts[index])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ValidVector(const SkDVector& v) {
+    if (SkDoubleIsNaN(v.fX)) {
+        return false;
+    }
+    return !SkDoubleIsNaN(v.fY);  
+}