| // Copyright 2014 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. |
| |
| #include "cc/surfaces/surface_id_allocator.h" |
| |
| namespace cc { |
| |
| SurfaceIdAllocator::SurfaceIdAllocator(uint32_t id_namespace) |
| : id_namespace_(id_namespace), next_id_(1u) { |
| } |
| |
| SurfaceId SurfaceIdAllocator::GenerateId() { |
| SurfaceId id(static_cast<uint64_t>(id_namespace_) << 32 | next_id_); |
| next_id_++; |
| return id; |
| } |
| |
| // static |
| uint32_t SurfaceIdAllocator::NamespaceForId(SurfaceId id) { |
| return id.id >> 32; |
| } |
| |
| } // namespace cc |