1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #pragma once
18
19 #include <array>
20 #include <cstdint>
21 #include <optional>
22 #include <string>
23 #include <string_view>
24 #include <vector>
25
26 #include <ui/GraphicTypes.h>
27
28 namespace android {
29
30 struct DisplayId {
31 using Type = PhysicalDisplayId;
32 Type value;
33
34 uint16_t manufacturerId() const;
35
36 static DisplayId fromEdid(uint8_t port, uint16_t manufacturerId, uint32_t displayNameHash);
37 };
38
39 inline bool operator==(DisplayId lhs, DisplayId rhs) {
40 return lhs.value == rhs.value;
41 }
42
43 inline bool operator!=(DisplayId lhs, DisplayId rhs) {
44 return !(lhs == rhs);
45 }
46
to_string(DisplayId displayId)47 inline std::string to_string(DisplayId displayId) {
48 return std::to_string(displayId.value);
49 }
50
51 using DisplayIdentificationData = std::vector<uint8_t>;
52
53 struct DisplayIdentificationInfo {
54 DisplayId id;
55 std::string name;
56 };
57
58 // NUL-terminated plug and play ID.
59 using PnpId = std::array<char, 4>;
60
61 struct Edid {
62 uint16_t manufacturerId;
63 PnpId pnpId;
64 std::string_view displayName;
65 };
66
67 bool isEdid(const DisplayIdentificationData&);
68 std::optional<Edid> parseEdid(const DisplayIdentificationData&);
69 std::optional<PnpId> getPnpId(uint16_t manufacturerId);
70 std::optional<PnpId> getPnpId(DisplayId);
71
72 std::optional<DisplayIdentificationInfo> parseDisplayIdentificationData(
73 uint8_t port, const DisplayIdentificationData&);
74
75 DisplayId getFallbackDisplayId(uint8_t port);
76 DisplayId getVirtualDisplayId(uint32_t id);
77
78 } // namespace android
79
80 namespace std {
81
82 template <>
83 struct hash<android::DisplayId> {
84 size_t operator()(android::DisplayId displayId) const {
85 return hash<android::DisplayId::Type>()(displayId.value);
86 }
87 };
88
89 } // namespace std
90