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#ifndef __HWC_TONEMAPPER_H__
#define __HWC_TONEMAPPER_H__

#include <fcntl.h>
#include <sys/mman.h>

#include <hardware/hwcomposer.h>

#include <core/layer_stack.h>
#include <utils/sys.h>
#include <vector>
#include "hwc_buffer_sync_handler.h"
#include "hwc_buffer_allocator.h"

class Tonemapper;

namespace sdm {

struct ToneMapConfig {
  int type = 0;
  ColorPrimaries colorPrimaries = ColorPrimaries_Max;
  GammaTransfer transfer = Transfer_Max;
  LayerBufferFormat format = kFormatRGBA8888;
  bool secure = false;
};

class ToneMapSession {
 public:
  ~ToneMapSession();
  DisplayError AllocateIntermediateBuffers(int width, int height, int format, int usage);
  void FreeIntermediateBuffers();
  void UpdateBuffer(int acquire_fence, LayerBuffer *buffer);
  void SetReleaseFence(int fd);
  void SetToneMapConfig(Layer *layer);
  bool IsSameToneMapConfig(Layer *layer);

  static const uint8_t kNumIntermediateBuffers = 2;
  Tonemapper *gpu_tone_mapper_ = NULL;
  ToneMapConfig tone_map_config_ = {};
  uint8_t current_buffer_index_ = 0;
  private_handle_t *intermediate_buffer_[kNumIntermediateBuffers] = {NULL, NULL};
  int release_fence_fd_[kNumIntermediateBuffers] = {-1, -1};
  bool acquired_ = false;
  int layer_index_ = -1;
};

class HWCToneMapper {
 public:
  HWCToneMapper() {}
  ~HWCToneMapper() {}

  int HandleToneMap(hwc_display_contents_1_t *content_list, LayerStack *layer_stack);
  bool IsActive() { return !tone_map_sessions_.empty(); }
  void PostCommit(LayerStack *layer_stack);
  void SetFrameDumpConfig(uint32_t count);
  void Terminate();

 private:
  void ToneMap(hwc_layer_1_t *hwc_layer, Layer *layer, ToneMapSession *session);
  DisplayError AcquireToneMapSession(Layer *layer, uint32_t *session_index);
  void DumpToneMapOutput(ToneMapSession *session, int *acquire_fence);

  std::vector<ToneMapSession*> tone_map_sessions_;
  HWCBufferSyncHandler buffer_sync_handler_ = {};
  HWCBufferAllocator buffer_allocator_ = {};
  uint32_t dump_frame_count_ = 0;
  uint32_t dump_frame_index_ = 0;
  uint32_t fb_session_index_ = 0;
};

}  // namespace sdm
#endif  // __HWC_TONEMAPPER_H__