ui/compositor/clip_transform_recorder.h

   1 // Copyright 2015 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_COMPOSITOR_CLIP_TRANSFORM_RECORDER_H_
   6 #define UI_COMPOSITOR_CLIP_TRANSFORM_RECORDER_H_
   7
   8 #include "base/macros.h"
   9 #include "ui/compositor/compositor_export.h"
  10
  11 namespace gfx {
  12 class Canvas;
  13 class Path;
  14 class Rect;
  15 class Transform;
  16 }
  17
  18 namespace ui {
  19 class PaintContext;
  20
  21 // A class to provide scoped clips and transforms of painting to a
  22 // DisplayItemList. The the clip/transform provided will be applied to any
  23 // DisplayItems added to the DisplayItemList while this object is alive. In
  24 // other words, any nested PaintRecorders or other ClipTransformRecorders will
  25 // be clipped/transformed.
  26 class COMPOSITOR_EXPORT ClipTransformRecorder {
  27  public:
  28   explicit ClipTransformRecorder(const PaintContext& context);
  29   ~ClipTransformRecorder();
  30
  31   void ClipRect(const gfx::Rect& clip_rect);
  32   void ClipPath(const gfx::Path& clip_path);
  33   void ClipPathWithAntiAliasing(const gfx::Path& clip_path);
  34   void Transform(const gfx::Transform& transform);
  35
  36  private:
  37   gfx::Canvas* canvas_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(ClipTransformRecorder);
  40 };
  41
  42 }  // namespace ui
  43
  44 #endif  // UI_COMPOSITOR_CLIP_TRANSFORM_RECORDER_H_