RasterizerView.h

#pragma once
 
#include <Foundation/Containers/Deque.h>
#include <Foundation/Math/Transform.h>
#include <Foundation/Threading/Mutex.h>
#include <Foundation/Types/ArrayPtr.h>
#include <RendererCore/RendererCoreDLL.h>
 
class Rasterizer;
class plRasterizerObject;
class plColorLinearUB;
class plCamera;
class plSimdBBox;
 
class PL_RENDERERCORE_DLL plRasterizerView final
{
  PL_DISALLOW_COPY_AND_ASSIGN(plRasterizerView);
 
public:
  plRasterizerView();
  ~plRasterizerView();
 
  void SetResolution(plUInt32 uiWidth, plUInt32 uiHeight, float fAspectRatio);
 
  plUInt32 GetResolutionX() const { return m_uiResolutionX; }
  plUInt32 GetResolutionY() const { return m_uiResolutionY; }
 
  void BeginScene();
 
  void EndScene();
 
  void ReadBackFrame(plArrayPtr<plColorLinearUB> targetBuffer) const;
 
  void SetCamera(const plCamera* pCamera)
  {
    m_pCamera = pCamera;
  }
 
  void AddObject(const plRasterizerObject* pObject, const plTransform& transform)
  {
    auto& inst = m_Instances.ExpandAndGetRef();
    inst.m_pObject = pObject;
    inst.m_Transform = transform;
  }
 
  bool IsVisible(const plSimdBBox& aabb) const;
 
  bool HasRasterizedAnyOccluders() const
  {
    return m_bAnyOccludersRasterized;
  }
 
private:
  void SortObjectsFrontToBack();
  void RasterizeObjects(plUInt32 uiMaxObjects);
  void UpdateViewProjectionMatrix();
  void ApplyModelViewProjectionMatrix(const plTransform& modelTransform);
 
  bool m_bAnyOccludersRasterized = false;
  const plCamera* m_pCamera = nullptr;
  plUInt32 m_uiResolutionX = 0;
  plUInt32 m_uiResolutionY = 0;
  float m_fAspectRation = 1.0f;
  plUniquePtr<Rasterizer> m_pRasterizer;
 
  struct Instance
  {
    plTransform m_Transform;
    const plRasterizerObject* m_pObject;
  };
 
  plDeque<Instance> m_Instances;
  plMat4 m_mViewProjection;
};
 
class plRasterizerViewPool
{
public:
  plRasterizerView* GetRasterizerView(plUInt32 uiWidth, plUInt32 uiHeight, float fAspectRatio);
  void ReturnRasterizerView(plRasterizerView* pView);
 
private:
  struct PoolEntry
  {
    bool m_bInUse = false;
    plRasterizerView m_RasterizerView;
  };
 
  plMutex m_Mutex;
  plDeque<PoolEntry> m_Entries;
};