system/hwc3/DisplayChanges.h

/*
 * 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_DISPLAYCHANGES_H
#define ANDROID_HWC_DISPLAYCHANGES_H

#include <aidl/android/hardware/graphics/composer3/ChangedCompositionLayer.h>
#include <aidl/android/hardware/graphics/composer3/ChangedCompositionTypes.h>
#include <aidl/android/hardware/graphics/composer3/DisplayRequest.h>

#include <optional>

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

struct DisplayChanges {
  std::optional<ChangedCompositionTypes> compositionChanges;
  std::optional<DisplayRequest> displayRequestChanges;

  void addLayerCompositionChange(int64_t displayId, int64_t layerId,
                                 Composition layerComposition) {
    if (!compositionChanges) {
      compositionChanges.emplace();
      compositionChanges->display = displayId;
    }

    ChangedCompositionLayer compositionChange;
    compositionChange.layer = layerId;
    compositionChange.composition = layerComposition;
    compositionChanges->layers.emplace_back(std::move(compositionChange));
  }

  void clearLayerCompositionChanges() { compositionChanges.reset(); }

  bool hasAnyChanges() const {
    return compositionChanges.has_value() || displayRequestChanges.has_value();
  }

  void reset() {
    compositionChanges.reset();
    displayRequestChanges.reset();
  }
};

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

#endif