ui/gfx/path.h

   1 // Copyright (c) 2012 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 #ifndef UI_GFX_PATH_H_
   6 #define UI_GFX_PATH_H_
   7
   8 #include "base/basictypes.h"
   9 #include "third_party/skia/include/core/SkPath.h"
  10 #include "ui/gfx/gfx_export.h"
  11 #include "ui/gfx/native_widget_types.h"
  12
  13 namespace gfx {
  14
  15 class GFX_EXPORT Path : public SkPath {
  16  public:
  17   // Used by Path(Point,size_t) constructor.
  18   struct Point {
  19     int x;
  20     int y;
  21   };
  22   struct PointF {
  23     float x;
  24     float y;
  25   };
  26
  27   Path();
  28
  29   // Creates a path populated with the specified points.
  30   Path(const Point* points, size_t count);
  31   Path(const PointF* points, size_t count);
  32
  33   ~Path();
  34
  35 #if defined(USE_AURA) || defined(USE_X11)
  36   // Creates a NativeRegion from the path. The caller is responsible for freeing
  37   // resources used by this region. This only supports polygon paths.
  38   NativeRegion CreateNativeRegion() const;
  39
  40   // Returns the intersection of the two regions. The caller owns the returned
  41   // object.
  42   static gfx::NativeRegion IntersectRegions(gfx::NativeRegion r1,
  43                                             gfx::NativeRegion r2);
  44
  45   // Returns the union of the two regions. The caller owns the returned object.
  46   static gfx::NativeRegion CombineRegions(gfx::NativeRegion r1,
  47                                           gfx::NativeRegion r2);
  48
  49   // Returns the difference of the two regions. The caller owns the returned
  50   // object.
  51   static gfx::NativeRegion SubtractRegion(gfx::NativeRegion r1,
  52                                           gfx::NativeRegion r2);
  53 #endif
  54
  55  private:
  56   DISALLOW_COPY_AND_ASSIGN(Path);
  57 };
  58
  59 }
  60
  61 #endif  // UI_GFX_PATH_H_