blob: 1dc32ce12c0a964f6eb0d167a682abc8fdc601e8 [file] [log] [blame]
// 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 <stdint.h>
#include <iosfwd>
#include <string>
#include "base/format_macros.h"
#include "base/hash.h"
#include "cc/surfaces/frame_sink_id.h"
#include "cc/surfaces/local_surface_id.h"
#include "mojo/public/cpp/bindings/struct_traits.h"
namespace cc {
namespace mojom {
class SurfaceIdDataView;
class SurfaceId {
constexpr SurfaceId() = default;
constexpr SurfaceId(const SurfaceId& other) = default;
// A SurfaceId consists of two components: FrameSinkId and LocalSurfaceId.
// A |frame_sink_id| consists of two components; one is allocated by the
// display compositor service and one is allocated by the client. The
// |frame_sink_id| uniquely identifies a FrameSink (and frame source).
// A |local_surface_id| is a sequentially allocated ID generated by the frame
// source that uniquely identifies a sequential set of frames of the same size
// and device scale factor.
constexpr SurfaceId(const FrameSinkId& frame_sink_id,
const LocalSurfaceId& local_surface_id)
: frame_sink_id_(frame_sink_id), local_surface_id_(local_surface_id) {}
bool is_valid() const {
return frame_sink_id_.is_valid() && local_surface_id_.is_valid();
size_t hash() const {
return base::HashInts(static_cast<uint64_t>(frame_sink_id_.hash()),
const FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
const LocalSurfaceId& local_surface_id() const { return local_surface_id_; }
std::string ToString() const;
bool operator==(const SurfaceId& other) const {
return frame_sink_id_ == other.frame_sink_id_ &&
local_surface_id_ == other.local_surface_id_;
bool operator!=(const SurfaceId& other) const { return !(*this == other); }
bool operator<(const SurfaceId& other) const {
return std::tie(frame_sink_id_, local_surface_id_) <
std::tie(other.frame_sink_id_, other.local_surface_id_);
friend struct mojo::StructTraits<mojom::SurfaceIdDataView, SurfaceId>;
FrameSinkId frame_sink_id_;
LocalSurfaceId local_surface_id_;
std::ostream& operator<<(std::ostream& out, const SurfaceId& surface_id);
struct SurfaceIdHash {
size_t operator()(const SurfaceId& key) const { return key.hash(); }
} // namespace cc