| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_VIZ_SERVICE_SURFACES_SURFACE_REFERENCE_H_ |
| #define COMPONENTS_VIZ_SERVICE_SURFACES_SURFACE_REFERENCE_H_ |
| |
| #include <string> |
| |
| #include "base/hash.h" |
| #include "components/viz/common/surfaces/surface_id.h" |
| #include "components/viz/service/viz_service_export.h" |
| |
| namespace viz { |
| |
| // Hold a reference from an embedding (parent) to embedded (child) surface. |
| class VIZ_SERVICE_EXPORT SurfaceReference { |
| public: |
| SurfaceReference(); |
| SurfaceReference(const SurfaceId& parent_id, const SurfaceId& child_id); |
| SurfaceReference(const SurfaceReference& other); |
| |
| ~SurfaceReference(); |
| |
| const SurfaceId& parent_id() const { return parent_id_; } |
| const SurfaceId& child_id() const { return child_id_; } |
| |
| size_t hash() const { |
| return base::HashInts(static_cast<uint64_t>(parent_id_.hash()), |
| static_cast<uint64_t>(child_id_.hash())); |
| } |
| |
| bool operator==(const SurfaceReference& other) const { |
| return parent_id_ == other.parent_id_ && child_id_ == other.child_id_; |
| } |
| |
| bool operator!=(const SurfaceReference& other) const { |
| return !(*this == other); |
| } |
| |
| bool operator<(const SurfaceReference& other) const { |
| return std::tie(parent_id_, child_id_) < |
| std::tie(other.parent_id_, other.child_id_); |
| } |
| |
| std::string ToString() const; |
| |
| private: |
| SurfaceId parent_id_; |
| SurfaceId child_id_; |
| }; |
| |
| struct SurfaceReferenceHash { |
| size_t operator()(const SurfaceReference& ref) const { return ref.hash(); } |
| }; |
| |
| } // namespace viz |
| |
| #endif // COMPONENTS_VIZ_SERVICE_SURFACES_SURFACE_REFERENCE_H_ |