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      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 
     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