1 /*
2  * Copyright (C) 2023 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 #ifndef ANDROID_HWC_DRMSWAPCHAIN_H
17 #define ANDROID_HWC_DRMSWAPCHAIN_H
18 
19 #include <android-base/unique_fd.h>
20 
21 #include "Common.h"
22 #include "DrmClient.h"
23 
24 namespace aidl::android::hardware::graphics::composer3::impl {
25 
26 class DrmSwapchain {
27    public:
28     class Image {
29        public:
30         Image() = delete;
31         ~Image();
32         int wait();
33         void markAsInUse(::android::base::unique_fd useCompleteFenceFd);
34         const native_handle_t* getBuffer();
35         const std::shared_ptr<DrmBuffer> getDrmBuffer();
36         Image(Image&& other);
37 
38        private:
39         Image(const native_handle_t*, std::shared_ptr<DrmBuffer>);
40         const native_handle_t* mBuffer = nullptr;
41         std::shared_ptr<DrmBuffer> mDrmBuffer;
42         ::android::base::unique_fd mLastUseFenceFd;
43 
44         friend class DrmSwapchain;
45     };
46 
47     static std::unique_ptr<DrmSwapchain> create(uint32_t width, uint32_t height, uint32_t usage,
48                                                 DrmClient* client, uint32_t numImages = 3);
49     Image* getNextImage();
50 
51    private:
52     DrmSwapchain(std::vector<Image> images);
53     std::vector<Image> mImages;
54     std::size_t mLastUsedIndex = 0;
55 };
56 
57 }  // namespace aidl::android::hardware::graphics::composer3::impl
58 
59 #endif