1 /* 2 * Copyright 2022 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_GUESTFRAMECOMPOSER_H 18 #define ANDROID_HWC_GUESTFRAMECOMPOSER_H 19 20 #include "Common.h" 21 #include "Display.h" 22 #include "DrmPresenter.h" 23 #include "FrameComposer.h" 24 #include "Gralloc.h" 25 #include "Layer.h" 26 27 namespace aidl::android::hardware::graphics::composer3::impl { 28 29 class GuestFrameComposer : public FrameComposer { 30 public: 31 GuestFrameComposer() = default; 32 33 GuestFrameComposer(const GuestFrameComposer&) = delete; 34 GuestFrameComposer& operator=(const GuestFrameComposer&) = delete; 35 36 GuestFrameComposer(GuestFrameComposer&&) = delete; 37 GuestFrameComposer& operator=(GuestFrameComposer&&) = delete; 38 39 HWC3::Error init() override; 40 41 HWC3::Error registerOnHotplugCallback(const HotplugCallback& cb) override; 42 43 HWC3::Error unregisterOnHotplugCallback() override; 44 45 HWC3::Error onDisplayCreate(Display*) override; 46 47 HWC3::Error onDisplayDestroy(Display*) override; 48 49 HWC3::Error onDisplayClientTargetSet(Display*) override; 50 51 // Determines if this composer can compose the given layers on the given 52 // display and requests changes for layers that can't not be composed. 53 HWC3::Error validateDisplay(Display* display, 54 DisplayChanges* outChanges) override; 55 56 // Performs the actual composition of layers and presents the composed result 57 // to the display. 58 HWC3::Error presentDisplay( 59 Display* display, ::android::base::unique_fd* outDisplayFence, 60 std::unordered_map<int64_t, ::android::base::unique_fd>* outLayerFences) 61 override; 62 63 HWC3::Error onActiveConfigChange(Display* /*display*/) override; 64 getDrmPresenter()65 const DrmPresenter* getDrmPresenter() const override { 66 return &mDrmPresenter; 67 } 68 69 private: 70 struct DisplayConfig { 71 int width; 72 int height; 73 int dpiX; 74 int dpiY; 75 int refreshRateHz; 76 }; 77 78 HWC3::Error getDisplayConfigsFromDeviceConfig( 79 std::vector<DisplayConfig>* configs); 80 81 HWC3::Error getDisplayConfigsFromSystemProp( 82 std::vector<DisplayConfig>* configs); 83 84 // Returns true if the given layer's buffer has supported format. 85 bool canComposeLayer(Layer* layer); 86 87 // Composes the given layer into the given destination buffer. 88 HWC3::Error composeLayerInto(Layer* layer, std::uint8_t* dstBuffer, 89 std::uint32_t dstBufferWidth, 90 std::uint32_t dstBufferHeight, 91 std::uint32_t dstBufferStrideBytes, 92 std::uint32_t dstBufferBytesPerPixel); 93 94 struct DisplayInfo { 95 // Additional per display buffer for the composition result. 96 buffer_handle_t compositionResultBuffer = nullptr; 97 98 std::shared_ptr<DrmBuffer> compositionResultDrmBuffer; 99 }; 100 101 std::unordered_map<int64_t, DisplayInfo> mDisplayInfos; 102 103 Gralloc mGralloc; 104 105 DrmPresenter mDrmPresenter; 106 107 // Cuttlefish on QEMU does not have a display. Disable presenting to avoid 108 // spamming logcat with DRM commit failures. 109 bool mPresentDisabled = false; 110 111 uint8_t* getRotatingScratchBuffer(std::size_t neededSize, 112 std::uint32_t order); 113 uint8_t* getSpecialScratchBuffer(std::size_t neededSize); 114 115 HWC3::Error applyColorTransformToRGBA( 116 const std::array<float, 16>& colorTransform, // 117 std::uint8_t* buffer, // 118 std::uint32_t bufferWidth, // 119 std::uint32_t bufferHeight, // 120 std::uint32_t bufferStrideBytes); 121 122 std::vector<uint8_t> mScratchBuffer; 123 std::vector<uint8_t> mSpecialScratchBuffer; 124 }; 125 126 } // namespace aidl::android::hardware::graphics::composer3::impl 127 128 #endif 129