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_win.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "ui/gfx/path.h"
   9
  10 namespace gfx {
  11
  12 HRGN CreateHRGNFromSkPath(const SkPath& path) {
  13   int point_count = path.getPoints(NULL, 0);
  14   scoped_ptr<SkPoint[]> points(new SkPoint[point_count]);
  15   path.getPoints(points.get(), point_count);
  16   scoped_ptr<POINT[]> windows_points(new POINT[point_count]);
  17   for (int i = 0; i < point_count; ++i) {
  18     windows_points[i].x = SkScalarRound(points[i].fX);
  19     windows_points[i].y = SkScalarRound(points[i].fY);
  20   }
  21
  22   return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
  23 }
  24
  25 // See path_aura.cc for Aura definition of these methods:
  26 #if !defined(USE_AURA)
  27
  28 NativeRegion Path::CreateNativeRegion() const {
  29   return CreateHRGNFromSkPath(*this);
  30 }
  31
  32 // static
  33 NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
  34   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  35   CombineRgn(dest, r1, r2, RGN_AND);
  36   return dest;
  37 }
  38
  39 // static
  40 NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
  41   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  42   CombineRgn(dest, r1, r2, RGN_OR);
  43   return dest;
  44 }
  45
  46 // static
  47 NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
  48   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  49   CombineRgn(dest, r1, r2, RGN_DIFF);
  50   return dest;
  51 }
  52
  53 #endif
  54
  55 }  // namespace gfx