1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/gfx/path_win.h"
6
7#include "base/memory/scoped_ptr.h"
8#include "base/win/scoped_gdi_object.h"
9#include "third_party/skia/include/core/SkRegion.h"
10#include "ui/gfx/path.h"
11
12namespace gfx {
13
14HRGN CreateHRGNFromSkRegion(const SkRegion& region) {
15  base::win::ScopedRegion temp(::CreateRectRgn(0, 0, 0, 0));
16  base::win::ScopedRegion result(::CreateRectRgn(0, 0, 0, 0));
17
18  for (SkRegion::Iterator i(region); !i.done(); i.next()) {
19    const SkIRect& rect = i.rect();
20    ::SetRectRgn(temp, rect.left(), rect.top(), rect.right(), rect.bottom());
21    ::CombineRgn(result, result, temp, RGN_OR);
22  }
23
24  return result.release();
25}
26
27HRGN CreateHRGNFromSkPath(const SkPath& path) {
28  int point_count = path.getPoints(NULL, 0);
29  scoped_ptr<SkPoint[]> points(new SkPoint[point_count]);
30  path.getPoints(points.get(), point_count);
31  scoped_ptr<POINT[]> windows_points(new POINT[point_count]);
32  for (int i = 0; i < point_count; ++i) {
33    windows_points[i].x = SkScalarRoundToInt(points[i].fX);
34    windows_points[i].y = SkScalarRoundToInt(points[i].fY);
35  }
36
37  return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
38}
39
40// See path_aura.cc for Aura definition of these methods:
41#if !defined(USE_AURA)
42
43NativeRegion Path::CreateNativeRegion() const {
44  return CreateHRGNFromSkPath(*this);
45}
46
47// static
48NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
49  HRGN dest = CreateRectRgn(0, 0, 1, 1);
50  CombineRgn(dest, r1, r2, RGN_AND);
51  return dest;
52}
53
54// static
55NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
56  HRGN dest = CreateRectRgn(0, 0, 1, 1);
57  CombineRgn(dest, r1, r2, RGN_OR);
58  return dest;
59}
60
61// static
62NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
63  HRGN dest = CreateRectRgn(0, 0, 1, 1);
64  CombineRgn(dest, r1, r2, RGN_DIFF);
65  return dest;
66}
67
68#endif
69
70}  // namespace gfx
71