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