/*
 * Copyright 2022 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.
 */

#ifndef ANDROID_HWC_CLIENTFRAMECOMPOSER_H
#define ANDROID_HWC_CLIENTFRAMECOMPOSER_H

#include "Common.h"
#include "Display.h"
#include "DrmClient.h"
#include "FrameComposer.h"
#include "Gralloc.h"
#include "Layer.h"

namespace aidl::android::hardware::graphics::composer3::impl {

// A frame composer which always fallsback to client composition
// (a.k.a make SurfaceFlinger do the composition).
class ClientFrameComposer : public FrameComposer {
   public:
    ClientFrameComposer() = default;

    ClientFrameComposer(const ClientFrameComposer&) = delete;
    ClientFrameComposer& operator=(const ClientFrameComposer&) = delete;

    ClientFrameComposer(ClientFrameComposer&&) = delete;
    ClientFrameComposer& operator=(ClientFrameComposer&&) = delete;

    HWC3::Error init() override;

    HWC3::Error registerOnHotplugCallback(const HotplugCallback& cb) override;

    HWC3::Error unregisterOnHotplugCallback() override;

    HWC3::Error onDisplayCreate(Display* display) override;

    HWC3::Error onDisplayDestroy(Display* display) override;

    HWC3::Error onDisplayClientTargetSet(Display* display) override;

    HWC3::Error onActiveConfigChange(Display* display) override;

    // Determines if this composer can compose the given layers on the given
    // display and requests changes for layers that can't not be composed.
    HWC3::Error validateDisplay(Display* display, DisplayChanges* outChanges) override;

    // Performs the actual composition of layers and presents the composed result
    // to the display.
    HWC3::Error presentDisplay(
        Display* display, ::android::base::unique_fd* outDisplayFence,
        std::unordered_map<int64_t, ::android::base::unique_fd>* outLayerFences) override;

    const DrmClient* getDrmPresenter() const override { return &mDrmClient; }

   private:
    struct DisplayInfo {
        std::shared_ptr<DrmBuffer> clientTargetDrmBuffer;
    };

    std::unordered_map<int64_t, DisplayInfo> mDisplayInfos;

    DrmClient mDrmClient;
};

}  // namespace aidl::android::hardware::graphics::composer3::impl

#endif