/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com.                */
#ifndef GAME_CLIENT_COMPONENTS_MAPLAYERS_H
#define GAME_CLIENT_COMPONENTS_MAPLAYERS_H
#include <game/client/component.h>

#include <vector>
#include <cstdint>


#define INDEX_BUFFER_GROUP_WIDTH 12
#define INDEX_BUFFER_GROUP_HEIGHT 9
#define INDEX_BORDER_BUFFER_GROUP_SIZE 20

typedef char* offset_ptr_size;
typedef uintptr_t offset_ptr;
typedef unsigned int offset_ptr32;

class CMapLayers : public CComponent
{
	friend class CBackground;

	CLayers *m_pLayers;
	class CMapImages *m_pImages;
	int m_Type;
	int m_CurrentLocalTick;
	int m_LastLocalTick;
	bool m_EnvelopeUpdate;

	void MapScreenToGroup(float CenterX, float CenterY, CMapItemGroup *pGroup, float Zoom = 1.0f);

	struct STileLayerVisuals
	{
		STileLayerVisuals() : m_TilesOfLayer(NULL), m_BorderTop(NULL), m_BorderLeft(NULL), m_BorderRight(NULL), m_BorderBottom(NULL)
		{
			m_Width = 0;
			m_Height = 0;
			m_BufferContainerIndex = -1;
			m_IsTextured = false;
		}

		bool Init(unsigned int Width, unsigned int Height);

		~STileLayerVisuals();

		struct STileVisual
		{
			STileVisual() : m_IndexBufferByteOffset(0) { }
		private:
			offset_ptr32 m_IndexBufferByteOffset;
		public:
			bool DoDraw()
			{
				return (m_IndexBufferByteOffset&0x00000001) != 0;
			}

			void Draw(bool SetDraw)
			{
				m_IndexBufferByteOffset = (SetDraw ? 0x00000001 : (offset_ptr32)0) | (m_IndexBufferByteOffset & 0xFFFFFFFE);
			}

			offset_ptr IndexBufferByteOffset()
			{
				return ((offset_ptr)(m_IndexBufferByteOffset & 0xFFFFFFFE));
			}

			void SetIndexBufferByteOffset(offset_ptr32 IndexBufferByteOff)
			{
				m_IndexBufferByteOffset = IndexBufferByteOff | (m_IndexBufferByteOffset & 0x00000001);
			}

			void AddIndexBufferByteOffset(offset_ptr32 IndexBufferByteOff)
			{
				m_IndexBufferByteOffset = ((m_IndexBufferByteOffset & 0xFFFFFFFE) + IndexBufferByteOff) | (m_IndexBufferByteOffset & 0x00000001);
			}
		};
		STileVisual* m_TilesOfLayer;

		STileVisual m_BorderTopLeft;
		STileVisual m_BorderTopRight;
		STileVisual m_BorderBottomRight;
		STileVisual m_BorderBottomLeft;

		STileVisual m_BorderKillTile; //end of map kill tile -- game layer only

		STileVisual* m_BorderTop;
		STileVisual* m_BorderLeft;
		STileVisual* m_BorderRight;
		STileVisual* m_BorderBottom;

		unsigned int m_Width;
		unsigned int m_Height;
		int m_BufferContainerIndex;
		bool m_IsTextured;
	};
	std::vector<STileLayerVisuals*> m_TileLayerVisuals;

	struct SQuadLayerVisuals
	{
		SQuadLayerVisuals() : m_QuadNum(0), m_QuadsOfLayer(NULL), m_BufferContainerIndex(-1), m_IsTextured(false) {}

		struct SQuadVisual
		{
			SQuadVisual() : m_IndexBufferByteOffset(0) {}

			offset_ptr m_IndexBufferByteOffset;
		};

		int m_QuadNum;
		SQuadVisual* m_QuadsOfLayer;

		int m_BufferContainerIndex;
		bool m_IsTextured;
	};
	std::vector<SQuadLayerVisuals*> m_QuadLayerVisuals;

	void LayersOfGroupCount(CMapItemGroup* pGroup, int& TileLayerCount, int& QuadLayerCount, bool& PassedGameLayer);

	void RenderTileBorderCornerTiles(int WidthOffsetToOrigin, int HeightOffsetToOrigin, int TileCountWidth, int TileCountHeight, int BufferContainerIndex, float *pColor, offset_ptr_size IndexBufferOffset, float *pOffset, float *pDir);
public:
	enum
	{
		TYPE_BACKGROUND=0,
		TYPE_BACKGROUND_FORCE,
		TYPE_FOREGROUND,
	};

	CMapLayers(int Type);
	virtual void OnInit();
	virtual void OnRender();
	virtual void OnMapLoad();

	void RenderTileLayer(int LayerIndex, ColorRGBA* pColor, CMapItemLayerTilemap* pTileLayer, CMapItemGroup* pGroup);
	void RenderTileBorder(int LayerIndex, ColorRGBA* pColor, CMapItemLayerTilemap* pTileLayer, CMapItemGroup* pGroup, int BorderX0, int BorderY0, int BorderX1, int BorderY1, int ScreenWidthTileCount, int ScreenHeightTileCount);
	void RenderKillTileBorder(int LayerIndex, ColorRGBA* pColor, CMapItemLayerTilemap* pTileLayer, CMapItemGroup* pGroup);
	void RenderQuadLayer(int LayerIndex, CMapItemLayerQuads* pQuadLayer, CMapItemGroup* pGroup, bool ForceRender = false);

	void EnvelopeUpdate();

	static void EnvelopeEval(float TimeOffset, int Env, float *pChannels, void *pUser);
};

#endif
