1/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7#include "SkOpEdgeBuilder.h"
8#include "SkPathOpsCommon.h"
9
10bool TightBounds(const SkPath& path, SkRect* result) {
11    SkChunkAlloc allocator(4096);  // FIXME: constant-ize, tune
12    SkOpContour contour;
13    SkOpContourHead* contourList = static_cast<SkOpContourHead*>(&contour);
14    SkOpGlobalState globalState(nullptr, contourList  SkDEBUGPARAMS(nullptr));
15    // turn path into list of segments
16    SkOpEdgeBuilder builder(path, &contour, &allocator, &globalState);
17    if (!builder.finish(&allocator)) {
18        return false;
19    }
20    if (!SortContourList(&contourList, false, false)) {
21        result->setEmpty();
22        return true;
23    }
24    SkOpContour* current = contourList;
25    SkPathOpsBounds bounds = current->bounds();
26    while ((current = current->next())) {
27        bounds.add(current->bounds());
28    }
29    *result = bounds;
30    return true;
31}
32