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 "base/win/scoped_gdi_object.h"
   9 #include "third_party/skia/include/core/SkRegion.h"
  10 #include "ui/gfx/path.h"
  11
  12 namespace gfx {
  13
  14 HRGN 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
  27 HRGN CreateHRGNFromSkPath(const SkPath& path) {
  28   SkRegion clip_region;
  29   clip_region.setRect(path.getBounds().round());
  30   SkRegion region;
  31   region.setPath(path, clip_region);
  32   return CreateHRGNFromSkRegion(region);
  33 }
  34
  35 // See path_aura.cc for Aura definition of these methods:
  36 #if !defined(USE_AURA)
  37
  38 NativeRegion Path::CreateNativeRegion() const {
  39   return CreateHRGNFromSkPath(*this);
  40 }
  41
  42 // static
  43 NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
  44   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  45   CombineRgn(dest, r1, r2, RGN_AND);
  46   return dest;
  47 }
  48
  49 // static
  50 NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
  51   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  52   CombineRgn(dest, r1, r2, RGN_OR);
  53   return dest;
  54 }
  55
  56 // static
  57 NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
  58   HRGN dest = CreateRectRgn(0, 0, 1, 1);
  59   CombineRgn(dest, r1, r2, RGN_DIFF);
  60   return dest;
  61 }
  62
  63 #endif
  64
  65 }  // namespace gfx