1 /* 2 * Copyright 2021 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 #ifndef ANDROID_HWC_DEVICE_H 18 #define ANDROID_HWC_DEVICE_H 19 20 #include <atomic> 21 #include <map> 22 #include <memory> 23 #include <mutex> 24 #include <set> 25 #include <unordered_map> 26 #include <unordered_set> 27 #include <vector> 28 29 #include "Common.h" 30 #include "Composer.h" 31 #include "Display.h" 32 #include "DrmPresenter.h" 33 #include "Layer.h" 34 35 namespace android { 36 37 class Composer; 38 class Display; 39 40 class Device : public hwc2_device_t { 41 public: fromDevice(hw_device_t * device)42 static inline Device* fromDevice(hw_device_t* device) { 43 return reinterpret_cast<Device*>(device); 44 } 45 fromDevice(hwc2_device_t * device)46 static inline Device* fromDevice(hwc2_device_t* device) { 47 return static_cast<Device*>(device); 48 } 49 50 Device(); 51 ~Device(); 52 53 HWC2::Error init(); 54 55 HWC2::Error createDisplays(); 56 57 HWC2::Error createDisplay(hwc2_display_t displayId, 58 hwc2_config_t activeConfigId, 59 const std::vector<DisplayConfig>& configs); 60 61 Display* getDisplay(hwc2_display_t displayId); 62 63 private: 64 HWC2::Error destroyDisplays(); 65 66 bool handleHotplug(bool connected, uint32_t id, uint32_t width, 67 uint32_t height, uint32_t dpiX, uint32_t dpiY, 68 uint32_t refreshRate); 69 70 void getCapabilities(uint32_t* outCount, int32_t* outCapabilities); 71 static void getCapabilitiesHook(hwc2_device_t* device, uint32_t* outCount, 72 int32_t* outCapabilities); 73 74 hwc2_function_pointer_t getFunction(int32_t descriptor); 75 static hwc2_function_pointer_t getFunctionHook(hwc2_device_t* device, 76 int32_t descriptor); 77 78 // Wrapper to call a specific function on a specific device. 79 template <typename T, typename HookType, HookType func, typename... Args> DeviceHook(hwc2_device_t * dev,Args...args)80 static T DeviceHook(hwc2_device_t* dev, Args... args) { 81 Device* device = Device::fromDevice(dev); 82 return static_cast<T>(((*device).*func)(std::forward<Args>(args)...)); 83 } 84 85 // Wrapper to call a specific function on a specific display. 86 template <typename HookType, HookType func, typename... Args> displayHook(hwc2_device_t * dev,hwc2_display_t displayId,Args...args)87 static int32_t displayHook(hwc2_device_t* dev, hwc2_display_t displayId, 88 Args... args) { 89 Device* device = Device::fromDevice(dev); 90 91 Display* display = device->getDisplay(displayId); 92 if (display == nullptr) { 93 return static_cast<int32_t>(HWC2::Error::BadDisplay); 94 } 95 96 return static_cast<int32_t>((display->*func)(std::forward<Args>(args)...)); 97 } 98 99 // Wrapper to call a specific function on a specific layer. 100 template <typename HookType, HookType func, typename... Args> layerHook(hwc2_device_t * dev,hwc2_display_t displayId,hwc2_layer_t layerId,Args...args)101 static int32_t layerHook(hwc2_device_t* dev, hwc2_display_t displayId, 102 hwc2_layer_t layerId, Args... args) { 103 Device* device = Device::fromDevice(dev); 104 105 Display* display = device->getDisplay(displayId); 106 if (display == nullptr) { 107 return static_cast<int32_t>(HWC2::Error::BadDisplay); 108 } 109 110 Layer* layer = display->getLayer(layerId); 111 if (layer == nullptr) { 112 return static_cast<int32_t>(HWC2::Error::BadLayer); 113 } 114 115 return static_cast<int32_t>((layer->*func)(std::forward<Args>(args)...)); 116 } 117 118 // Device functions 119 HWC2::Error createVirtualDisplay(uint32_t width, uint32_t height, 120 int32_t* format, hwc2_display_t* outDisplay); 121 122 HWC2::Error destroyVirtualDisplay(hwc2_display_t display); 123 124 void dump(uint32_t* outSize, char* outBuffer); 125 126 uint32_t getMaxVirtualDisplayCount(); 127 128 HWC2::Error registerCallback(int32_t descriptor, 129 hwc2_callback_data_t callbackData, 130 hwc2_function_pointer_t pointer); 131 132 // These are potentially accessed from multiple threads, and are protected 133 // by this mutex. 134 std::mutex mStateMutex; 135 136 std::unique_ptr<Composer> mComposer; 137 138 std::unordered_set<HWC2::Capability> mCapabilities; 139 140 // For sharing Vsync callback with each displays Vsync thread. 141 friend class Display; 142 143 struct CallbackInfo { 144 hwc2_callback_data_t data; 145 hwc2_function_pointer_t pointer; 146 }; 147 std::unordered_map<HWC2::Callback, CallbackInfo> mCallbacks; 148 std::map<hwc2_display_t, std::unique_ptr<Display>> mDisplays; 149 150 std::unique_ptr<DrmPresenter> mDrmPresenter; 151 }; 152 153 } // namespace android 154 #endif 155