/*
 * Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
 * Not a Contribution.
 *
 * Copyright 2015 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 __HWC_LAYERS_H__
#define __HWC_LAYERS_H__

/* This class translates HWC2 Layer functions to the SDM LayerStack
 */

#include <gralloc_priv.h>
#include <qdMetaData.h>
#include <core/layer_stack.h>
#define HWC2_INCLUDE_STRINGIFICATION
#define HWC2_USE_CPP11
#include <hardware/hwcomposer2.h>
#undef HWC2_INCLUDE_STRINGIFICATION
#undef HWC2_USE_CPP11
#include <set>
#include <map>
#include <queue>

namespace sdm {

enum GeometryChanges {
  kNone = 0x00,
  kBlendMode = 0x01,
  kDataspace = 0x02,
  kDisplayFrame = 0x04,
  kPlaneAlpha = 0x08,
  kSourceCrop = 0x0A,
  kTransform = 0x10,
  kZOrder = 0x12,
  kAdded = 0x14,
  kRemoved = 0x18,
};

class HWCLayer {
 public:
  explicit HWCLayer(hwc2_display_t display_id);
  ~HWCLayer();
  uint32_t GetZ() const { return z_; }
  hwc2_layer_t GetId() const { return id_; }
  Layer *GetSDMLayer() { return layer_; }

  HWC2::Error SetLayerBlendMode(HWC2::BlendMode mode);
  HWC2::Error SetLayerBuffer(buffer_handle_t buffer, int32_t acquire_fence);
  HWC2::Error SetLayerColor(hwc_color_t color);
  HWC2::Error SetLayerCompositionType(HWC2::Composition type);
  HWC2::Error SetLayerDataspace(int32_t dataspace);
  HWC2::Error SetLayerDisplayFrame(hwc_rect_t frame);
  HWC2::Error SetLayerPlaneAlpha(float alpha);
  HWC2::Error SetLayerSourceCrop(hwc_frect_t crop);
  HWC2::Error SetLayerSurfaceDamage(hwc_region_t damage);
  HWC2::Error SetLayerTransform(HWC2::Transform transform);
  HWC2::Error SetLayerVisibleRegion(hwc_region_t visible);
  HWC2::Error SetLayerZOrder(uint32_t z);
  void SetComposition(const LayerComposition &source);
  bool CompositionChanged(void) { return composition_changed_; }
  HWC2::Composition GetCompositionType() { return composition_; }
  uint32_t GetGeometryChanges() { return geometry_changes_; }
  void ResetGeometryChanges() { geometry_changes_ = GeometryChanges::kNone; }
  void PushReleaseFence(int32_t fence);
  int32_t PopReleaseFence(void);

 private:
  Layer *layer_ = nullptr;
  uint32_t z_ = 0;
  const hwc2_layer_t id_;
  const hwc2_display_t display_id_;
  static std::atomic<hwc2_layer_t> next_id_;
  std::queue<int32_t> release_fences_;

  HWC2::Composition composition_ = HWC2::Composition::Device;
  bool composition_changed_ = false;
  uint32_t geometry_changes_ = GeometryChanges::kNone;

  void SetRect(const hwc_rect_t &source, LayerRect *target);
  void SetRect(const hwc_frect_t &source, LayerRect *target);
  uint32_t GetUint32Color(const hwc_color_t &source);
  LayerBufferFormat GetSDMFormat(const int32_t &source, const int flags);
  LayerBufferS3DFormat GetS3DFormat(uint32_t s3d_format);
  DisplayError SetMetaData(const private_handle_t *pvt_handle, Layer *layer);
  DisplayError SetCSC(ColorSpace_t source, LayerCSC *target);
  DisplayError SetIGC(IGC_t source, LayerIGC *target);
  uint32_t RoundToStandardFPS(uint32_t fps);
};

struct SortLayersByZ {
  bool operator()(const HWCLayer *lhs, const HWCLayer *rhs);
};

}  // namespace sdm
#endif  // __HWC_LAYERS_H__