GPUResourcePool.h

#pragma once
 
#include <Foundation/Containers/Map.h>
#include <Foundation/Containers/Set.h>
#include <Foundation/Threading/Mutex.h>
#include <RendererCore/RendererCoreDLL.h>
#include <RendererFoundation/Resources/ResourceFormats.h>
 
struct plGALDeviceEvent;
 
class PL_RENDERERCORE_DLL plGPUResourcePool
{
public:
  plGPUResourcePool();
  ~plGPUResourcePool();
 
  plGALTextureHandle GetRenderTarget(const plGALTextureCreationDescription& textureDesc);
 
  plGALTextureHandle GetRenderTarget(plUInt32 uiWidth, plUInt32 uiHeight, plGALResourceFormat::Enum format,
    plGALMSAASampleCount::Enum sampleCount = plGALMSAASampleCount::None, plUInt32 uiSliceColunt = 1);
 
  void ReturnRenderTarget(plGALTextureHandle hRenderTarget);
 
 
  plGALBufferHandle GetBuffer(const plGALBufferCreationDescription& bufferDesc);
 
  void ReturnBuffer(plGALBufferHandle hBuffer);
 
 
  void RunGC(plUInt32 uiMinimumAge);
 
 
  static plGPUResourcePool* GetDefaultInstance();
  static void SetDefaultInstance(plGPUResourcePool* pDefaultInstance);
 
protected:
  void CheckAndPotentiallyRunGC();
  void UpdateMemoryStats() const;
  void GALDeviceEventHandler(const plGALDeviceEvent& e);
 
  struct TextureHandleWithAge
  {
    plGALTextureHandle m_hTexture;
    plUInt64 m_uiLastUsed = 0;
  };
 
  struct BufferHandleWithAge
  {
    plGALBufferHandle m_hBuffer;
    plUInt64 m_uiLastUsed = 0;
  };
 
  plEventSubscriptionID m_GALDeviceEventSubscriptionID = 0;
  plUInt64 m_uiMemoryThresholdForGC = 256 * 1024 * 1024;
  plUInt64 m_uiCurrentlyAllocatedMemory = 0;
  plUInt16 m_uiNumAllocationsThresholdForGC = 128;
  plUInt16 m_uiNumAllocationsSinceLastGC = 0;
  plUInt16 m_uiFramesThresholdSinceLastGC = 60; 
  plUInt16 m_uiFramesSinceLastGC = 0;
 
  plMap<plUInt32, plDynamicArray<TextureHandleWithAge>> m_AvailableTextures;
  plSet<plGALTextureHandle> m_TexturesInUse;
 
  plMap<plUInt32, plDynamicArray<BufferHandleWithAge>> m_AvailableBuffers;
  plSet<plGALBufferHandle> m_BuffersInUse;
 
  plMutex m_Lock;
 
  plGALDevice* m_pDevice;
 
private:
  static plGPUResourcePool* s_pDefaultInstance;
};