remove prototype pathops code

experimental/Intersection/TestUtilities.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 "CubicUtilities.h"
-#include "CurveIntersection.h"
-#include "TestUtilities.h"
-
-void quad_to_cubic(const Quadratic& quad, Cubic& cubic) {
-    cubic[0] = quad[0];
-    cubic[1].x = quad[0].x / 3 + quad[1].x * 2 / 3;
-    cubic[1].y = quad[0].y / 3 + quad[1].y * 2 / 3;
-    cubic[2].x = quad[2].x / 3 + quad[1].x * 2 / 3;
-    cubic[2].y = quad[2].y / 3 + quad[1].y * 2 / 3;
-    cubic[3] = quad[2];
-}
-
-static bool tiny(const Cubic& cubic) {
-    int index, minX, maxX, minY, maxY;
-    minX = maxX = minY = maxY = 0;
-    for (index = 1; index < 4; ++index) {
-        if (cubic[minX].x > cubic[index].x) {
-            minX = index;
-        }
-        if (cubic[minY].y > cubic[index].y) {
-            minY = index;
-        }
-        if (cubic[maxX].x < cubic[index].x) {
-            maxX = index;
-        }
-        if (cubic[maxY].y < cubic[index].y) {
-            maxY = index;
-        }
-    }
-    return     approximately_equal(cubic[maxX].x, cubic[minX].x)
-            && approximately_equal(cubic[maxY].y, cubic[minY].y);
-}
-
-void find_tight_bounds(const Cubic& cubic, _Rect& bounds) {
-    CubicPair cubicPair;
-    chop_at(cubic, cubicPair, 0.5);
-    if (!tiny(cubicPair.first()) && !controls_inside(cubicPair.first())) {
-        find_tight_bounds(cubicPair.first(), bounds);
-    } else {
-        bounds.add(cubicPair.first()[0]);
-        bounds.add(cubicPair.first()[3]);
-    }
-    if (!tiny(cubicPair.second()) && !controls_inside(cubicPair.second())) {
-        find_tight_bounds(cubicPair.second(), bounds);
-    } else {
-        bounds.add(cubicPair.second()[0]);
-        bounds.add(cubicPair.second()[3]);
-    }
-}
-
-bool controls_inside(const Cubic& cubic) {
-    return
-        ((cubic[0].x <= cubic[1].x && cubic[0].x <= cubic[2].x && cubic[1].x <= cubic[3].x && cubic[2].x <= cubic[3].x)
-     ||  (cubic[0].x >= cubic[1].x && cubic[0].x >= cubic[2].x && cubic[1].x >= cubic[3].x && cubic[2].x >= cubic[3].x))
-     && ((cubic[0].y <= cubic[1].y && cubic[0].y <= cubic[2].y && cubic[1].y <= cubic[3].y && cubic[2].y <= cubic[3].y)
-     ||  (cubic[0].y >= cubic[1].y && cubic[0].y >= cubic[2].y && cubic[1].y >= cubic[3].y && cubic[2].x >= cubic[3].y));
-}