cc/trees/occlusion.h

   1 // Copyright 2014 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 CC_TREES_OCCLUSION_H_
   6 #define CC_TREES_OCCLUSION_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "cc/base/cc_export.h"
  12 #include "cc/base/simple_enclosed_region.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/transform.h"
  15
  16 namespace cc {
  17
  18 class CC_EXPORT Occlusion {
  19  public:
  20   Occlusion();
  21   Occlusion(const gfx::Transform& draw_transform,
  22             const SimpleEnclosedRegion& occlusion_from_outside_target,
  23             const SimpleEnclosedRegion& occlusion_from_inside_target);
  24   Occlusion GetOcclusionWithGivenDrawTransform(
  25       const gfx::Transform& transform) const;
  26
  27   bool HasOcclusion() const;
  28   bool IsOccluded(const gfx::Rect& content_rect) const;
  29   gfx::Rect GetUnoccludedContentRect(const gfx::Rect& content_rect) const;
  30
  31   bool IsEqual(const Occlusion& other) const;
  32   std::string ToString() const;
  33
  34  private:
  35   gfx::Rect GetUnoccludedRectInTargetSurface(
  36       const gfx::Rect& content_rect) const;
  37
  38   gfx::Transform draw_transform_;
  39   SimpleEnclosedRegion occlusion_from_outside_target_;
  40   SimpleEnclosedRegion occlusion_from_inside_target_;
  41 };
  42
  43 }  // namespace cc
  44
  45 #endif  // CC_TREES_OCCLUSION_H_