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/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 23 bool IsOccluded(const gfx::Rect& content_rect) const; 24 gfx::Rect GetUnoccludedContentRect(const gfx::Rect& content_rect) const; 25 26 private: 27 gfx::Rect GetUnoccludedRectInTargetSurface( 28 const gfx::Rect& content_rect) const; 29 30 gfx::Transform draw_transform_; 31 SimpleEnclosedRegion occlusion_from_outside_target_; 32 SimpleEnclosedRegion occlusion_from_inside_target_; 33 }; 34 35 } // namespace cc 36 37 #endif // CC_TREES_OCCLUSION_H_ 38