/**
 ******************************************************************************
 * Xenia : Xbox 360 Emulator Research Project                                 *
 ******************************************************************************
 * Copyright 2018 Ben Vanik. All rights reserved.                             *
 * Released under the BSD license - see LICENSE in the root for more details. *
 ******************************************************************************
 */

#ifndef XENIA_UI_D3D12_D3D12_IMMEDIATE_DRAWER_H_
#define XENIA_UI_D3D12_D3D12_IMMEDIATE_DRAWER_H_

#include <deque>
#include <memory>

#include "xenia/ui/d3d12/command_list.h"
#include "xenia/ui/d3d12/d3d12_api.h"
#include "xenia/ui/d3d12/d3d12_context.h"
#include "xenia/ui/immediate_drawer.h"

namespace xe {
namespace ui {
namespace d3d12 {

class D3D12ImmediateDrawer : public ImmediateDrawer {
 public:
  D3D12ImmediateDrawer(D3D12Context* graphics_context);
  ~D3D12ImmediateDrawer() override;

  bool Initialize();
  void Shutdown();

  std::unique_ptr<ImmediateTexture> CreateTexture(uint32_t width,
                                                  uint32_t height,
                                                  ImmediateTextureFilter filter,
                                                  bool repeat,
                                                  const uint8_t* data) override;
  void UpdateTexture(ImmediateTexture* texture, const uint8_t* data) override;

  void Begin(int render_target_width, int render_target_height) override;
  void BeginDrawBatch(const ImmediateDrawBatch& batch) override;
  void Draw(const ImmediateDraw& draw) override;
  void EndDrawBatch() override;
  void End();

 private:
  D3D12Context* context_ = nullptr;

  enum class SamplerIndex {
    kNearestClamp,
    kLinearClamp,
    kNearestRepeat,
    kLinearRepeat,

    kSamplerCount
  };
  ID3D12DescriptorHeap* sampler_heap_ = nullptr;
  D3D12_CPU_DESCRIPTOR_HANDLE sampler_heap_cpu_start_;
  D3D12_GPU_DESCRIPTOR_HANDLE sampler_heap_gpu_start_;

  ID3D12GraphicsCommandList* current_command_list_ = nullptr;

  struct SubmittedTextureUpload {
    ID3D12Resource* data_resource;
    uint64_t frame;
  };
  std::deque<SubmittedTextureUpload> texture_uploads_submitted_;
};

}  // namespace d3d12
}  // namespace ui
}  // namespace xe

#endif  // XENIA_UI_D3D12_D3D12_IMMEDIATE_DRAWER_H_