ui/gfx/path_win.cc

   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.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8
   9 namespace gfx {
  10
  11 HRGN Path::CreateNativeRegion() const {
  12   int point_count = getPoints(NULL, 0);
  13   scoped_array<SkPoint> points(new SkPoint[point_count]);
  14   getPoints(points.get(), point_count);
  15   scoped_array<POINT> windows_points(new POINT[point_count]);
  16   for (int i = 0; i < point_count; ++i) {
  17     windows_points[i].x = SkScalarRound(points[i].fX);
  18     windows_points[i].y = SkScalarRound(points[i].fY);
  19   }
  20
  21   return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
  22 }
  23
  24 // static
  25 NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
  26   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  27   CombineRgn(dest, r1, r2, RGN_AND);
  28   return dest;
  29 }
  30
  31 // static
  32 NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
  33   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  34   CombineRgn(dest, r1, r2, RGN_OR);
  35   return dest;
  36 }
  37
  38 // static
  39 NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
  40   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  41   CombineRgn(dest, r1, r2, RGN_DIFF);
  42   return dest;
  43 }
  44
  45 }  // namespace gfx