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_HOSTFRAMECOMPOSER_H
18 #define ANDROID_HWC_HOSTFRAMECOMPOSER_H
19 
20 #include <android-base/unique_fd.h>
21 
22 #include <optional>
23 #include <tuple>
24 
25 #include "Common.h"
26 #include "DrmClient.h"
27 #include "DrmSwapchain.h"
28 #include "FrameComposer.h"
29 #include "HostConnection.h"
30 
31 namespace aidl::android::hardware::graphics::composer3::impl {
32 
33 class HostFrameComposer : public FrameComposer {
34    public:
35     HostFrameComposer() = default;
36 
37     HostFrameComposer(const HostFrameComposer&) = delete;
38     HostFrameComposer& operator=(const HostFrameComposer&) = delete;
39 
40     HostFrameComposer(HostFrameComposer&&) = delete;
41     HostFrameComposer& operator=(HostFrameComposer&&) = delete;
42 
43     HWC3::Error init() override;
44 
45     HWC3::Error registerOnHotplugCallback(const HotplugCallback& cb) override;
46 
47     HWC3::Error unregisterOnHotplugCallback() override;
48 
49     HWC3::Error onDisplayCreate(Display* display) override;
50 
51     HWC3::Error onDisplayDestroy(Display* display) override;
52 
53     HWC3::Error onDisplayClientTargetSet(Display* display) override;
54 
55     // Determines if this composer can compose the given layers on the given
56     // display and requests changes for layers that can't not be composed.
57     HWC3::Error validateDisplay(Display* display, DisplayChanges* outChanges) override;
58 
59     // Performs the actual composition of layers and presents the composed result
60     // to the display.
61     HWC3::Error presentDisplay(
62         Display* display, ::android::base::unique_fd* outDisplayFence,
63         std::unordered_map<int64_t, ::android::base::unique_fd>* outLayerFences) override;
64 
65     HWC3::Error onActiveConfigChange(Display* display) override;
66 
getDrmPresenter()67     const DrmClient* getDrmPresenter() const override {
68         if (mDrmClient) {
69             return &*mDrmClient;
70         }
71         return nullptr;
72     }
73 
74    private:
75     HWC3::Error createHostComposerDisplayInfo(Display* display, uint32_t hostDisplayId);
76 
77     void post(HostConnection* hostCon, ExtendedRCEncoderContext* rcEnc, uint32_t hostDisplayId,
78               buffer_handle_t h);
79 
80     bool mIsMinigbm = false;
81 
82     int mSyncDeviceFd = -1;
83 
84     struct HostComposerDisplayInfo {
85         uint32_t hostDisplayId = 0;
86         std::unique_ptr<DrmSwapchain> swapchain = {};
87         // Drm info for the displays client target buffer.
88         std::shared_ptr<DrmBuffer> clientTargetDrmBuffer;
89     };
90 
91     std::unordered_map<int64_t, HostComposerDisplayInfo> mDisplayInfos;
92 
93     std::optional<DrmClient> mDrmClient;
94 };
95 
96 }  // namespace aidl::android::hardware::graphics::composer3::impl
97 
98 #endif
99