| #pragma once |
| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <functional> |
| |
| #include <hardware/gralloc.h> |
| #include "hwcomposer_common.h" |
| |
| namespace cvd { |
| |
| using FbBroadcaster = std::function<void(int)>; |
| |
| class BaseComposer { |
| public: |
| BaseComposer(int64_t vsync_base_timestamp, int32_t vsync_period_ns); |
| ~BaseComposer(); |
| |
| // Sets the composition type of each layer and returns the number of layers |
| // to be composited by the hwcomposer. |
| int PrepareLayers(size_t num_layers, vsoc_hwc_layer* layers); |
| // Returns 0 if successful. |
| int SetLayers(size_t num_layers, vsoc_hwc_layer* layers); |
| // Changes the broadcaster, gives the ability to report more than just the |
| // offset by using a wrapper like the StatsKeepingComposer. Returns the old |
| // broadcaster. Passing a NULL pointer will cause the composer to not |
| // broadcast at all. |
| FbBroadcaster ReplaceFbBroadcaster(FbBroadcaster); |
| void Dump(char* buff, int buff_len); |
| |
| protected: |
| void Broadcast(int32_t offset); |
| int NextScreenBuffer(); |
| |
| const gralloc_module_t* gralloc_module_; |
| int64_t vsync_base_timestamp_; |
| int32_t vsync_period_ns_; |
| int last_frame_buffer_ = -1; // The first index will be 0 |
| |
| private: |
| // Returns buffer offset or negative on error. |
| int PostFrameBufferTarget(buffer_handle_t handle); |
| FbBroadcaster fb_broadcaster_; |
| }; |
| |
| } // namespace cvd |