TexturePacker.h

#pragma once
 
#include <Foundation/Containers/DynamicArray.h>
#include <Foundation/Math/Vec2.h>
#include <Texture/TextureDLL.h>
 
class PL_TEXTURE_DLL plTexturePacker
{
public:
  struct Texture
  {
    PL_DECLARE_POD_TYPE();
 
    plVec2U32 m_Size;
    plVec2U32 m_Position;
    plInt32 m_Priority = 0;
  };
 
  plTexturePacker();
  ~plTexturePacker();
 
  void SetTextureSize(plUInt32 uiWidth, plUInt32 uiHeight, plUInt32 uiReserveTextures = 0);
 
  void AddTexture(plUInt32 uiWidth, plUInt32 uiHeight);
 
  const plDynamicArray<Texture>& GetTextures() const { return m_Textures; }
 
  plResult PackTextures();
 
private:
  bool CanPlaceAt(plVec2U32 pos, plVec2U32 size);
  bool TryPlaceAt(plVec2U32 pos, plVec2U32 size);
  plUInt32 PosToIndex(plUInt32 x, plUInt32 y) const;
  bool TryPlaceTexture(plUInt32 idx);
 
  plUInt32 m_uiWidth = 0;
  plUInt32 m_uiHeight = 0;
 
  plDynamicArray<Texture> m_Textures;
  plDynamicArray<bool> m_Grid;
};