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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CC_SURFACES_SURFACE_ID_H_ | 5 #ifndef CC_SURFACES_SURFACE_ID_H_ |
6 #define CC_SURFACES_SURFACE_ID_H_ | 6 #define CC_SURFACES_SURFACE_ID_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include <functional> | 11 #include <functional> |
12 | 12 |
13 #include "base/format_macros.h" | 13 #include "base/format_macros.h" |
14 #include "base/hash.h" | 14 #include "base/hash.h" |
15 #include "base/strings/stringprintf.h" | 15 #include "base/strings/stringprintf.h" |
16 #include "cc/surfaces/frame_sink_id.h" | 16 #include "cc/surfaces/frame_sink_id.h" |
17 #include "cc/surfaces/local_frame_id.h" | 17 #include "cc/surfaces/local_frame_id.h" |
18 | 18 |
19 namespace cc { | 19 namespace cc { |
20 | 20 |
21 class SurfaceId { | 21 class SurfaceId { |
22 public: | 22 public: |
23 SurfaceId() = default; | 23 SurfaceId() = default; |
24 | 24 |
25 SurfaceId(const SurfaceId& other) | 25 SurfaceId(const SurfaceId& other) |
26 : frame_sink_id_(other.frame_sink_id_), | 26 : frame_sink_id_(other.frame_sink_id_), |
27 local_frame_id_(other.local_frame_id_) {} | 27 local_frame_id_(other.local_frame_id_) {} |
28 | 28 |
29 // A SurfaceId consists of three components: FrameSinkId, local Id, and nonce. | 29 // A SurfaceId consists of two components: FrameSinkId and local_frame_id. |
Fady Samuel
2016/11/09 21:41:57
nit: FrameSinkId and LocalFrameId.
Alex Z.
2016/11/09 22:05:21
Done.
| |
30 // A |frame_sink_id| consists of two components; one is allocated by the | 30 // A |frame_sink_id| consists of two components; one is allocated by the |
31 // display compositor service and one is allocated by the client. The | 31 // display compositor service and one is allocated by the client. The |
32 // |frame_sink_id| uniquely identifies a FrameSink (and frame source). | 32 // |frame_sink_id| uniquely identifies a FrameSink (and frame source). |
33 // A |local_id| is a sequentially allocated ID generated by the frame source | 33 // A |local_frame_id| is a sequentially allocated ID generated by the frame |
34 // that uniquely identifies a sequential set of frames of the same size and | 34 // source that uniquely identifies a sequential set of frames of the same size |
35 // device scale factor. | 35 // and device scale factor. |
36 // A |nonce| is a cryptographically secure unguessable token that makes it | |
37 // impossible for an unprivileged frame source to embed another frame source | |
38 // without being explicitly given the surface ID of that frame source from a | |
39 // privileged process. | |
40 SurfaceId(const FrameSinkId& frame_sink_id, | 36 SurfaceId(const FrameSinkId& frame_sink_id, |
41 const LocalFrameId& local_frame_id) | 37 const LocalFrameId& local_frame_id) |
42 : frame_sink_id_(frame_sink_id), local_frame_id_(local_frame_id) {} | 38 : frame_sink_id_(frame_sink_id), local_frame_id_(local_frame_id) {} |
43 | 39 |
44 bool is_null() const { | 40 bool is_null() const { |
45 return frame_sink_id_.is_null() && local_frame_id_.is_null(); | 41 return frame_sink_id_.is_null() && local_frame_id_.is_null(); |
46 } | 42 } |
47 | 43 |
48 size_t hash() const { | 44 size_t hash() const { |
49 return base::HashInts(static_cast<uint64_t>(frame_sink_id_.hash()), | 45 return base::HashInts(static_cast<uint64_t>(frame_sink_id_.hash()), |
(...skipping 28 matching lines...) Expand all Loading... | |
78 LocalFrameId local_frame_id_; | 74 LocalFrameId local_frame_id_; |
79 }; | 75 }; |
80 | 76 |
81 struct SurfaceIdHash { | 77 struct SurfaceIdHash { |
82 size_t operator()(const SurfaceId& key) const { return key.hash(); } | 78 size_t operator()(const SurfaceId& key) const { return key.hash(); } |
83 }; | 79 }; |
84 | 80 |
85 } // namespace cc | 81 } // namespace cc |
86 | 82 |
87 #endif // CC_SURFACES_SURFACE_ID_H_ | 83 #endif // CC_SURFACES_SURFACE_ID_H_ |
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