/*************************************************************************

	Texture map (TMAP)

	This manages I/O and caching for BPMPs

*************************************************************************/
#ifndef TMAP_H
#define TMAP_H


const CTG kctgTmap = 'TMAP';
const CTG kctgTxxf = 'TXXF';


// tmap on file
struct TMAPF
	{
	short bo;
	short osk;
	short cbRow;
	byte type;
	byte grftmap;
	short xpLeft;
	short ypTop;
	short dxp;
	short dyp;
	short xpOrigin;
	short ypOrigin;
	// void *rgb; 		// pixels follow immediately after TMAPF
	};
const ulong kbomTmapf = 0x54555000;

/* A TeXture XransForm on File */
typedef struct _txxff
	{
	short bo;				// byte order
	short osk;				// OS kind
	BMAT23 bmat23;
	} TXXFF, *PTXXFF;
const BOM kbomTxxff = 0x5FFF0000;

// REVIEW *****: should TMAPs have shade table chunks under them, or
//   is the shade table a global animal?  Right now it's global.

/****************************************
	The TMAP class
****************************************/
typedef class TMAP *PTMAP;
#define TMAP_PAR BACO
#define kclsTMAP 'TMAP'
class TMAP : public TMAP_PAR
	{
	RTCLASS_DEC
	ASSERT
	MARKMEM
protected:
	BPMP _bpmp;
	bool _fImported; // if fTrue, BRender allocated the pixels
					 // if fFalse, we allocated the pixels
protected:
	TMAP(void) {}	// can't instantiate directly; must use PtmapRead
#ifdef NOT_YET_REVIEWED
	void TMAP::_SortInverseTable(byte *prgb, long cbRgb, BRCLR brclrLo,
		BRCLR brclrHi);
#endif // NOT_YET_REVIEWED
public:
	~TMAP(void);

	//  REVIEW *****(peted): MBMP's ...Read function just takes a PBLCK; this
	//  is more like the FRead... function, just without the BACO stuff.  Why
	//  the difference?
	//	Addendum: to enable compiling 'TMAP' chunks, I added an FWrite that does
	//	take just a PBLCK.  Should this be necessary for PtmapRead in the future,
	//	it's a simple matter of extracting the code in PtmapRead that is needed,
	//	like I did for FWrite.
	static PTMAP PtmapRead(PCFL pcfl, CTG ctg, CNO cno);
	bool FWrite(PCFL pcfl, CTG ctg, CNO *pcno);

	//	a chunky resource reader for a TMAP
	static bool FReadTmap(PCRF pcrf, CTG ctg, CNO cno, PBLCK pblck,
		PBACO *ppbaco, long *pcb);

	//	Given a BPMP (a Brender br_pixelmap), create a TMAP
	static PTMAP PtmapNewFromBpmp(BPMP *pbpmp);

	//	Give back the bpmp for this TMAP
	BPMP *Pbpmp(void) { return &_bpmp; }

	//	Reads a .bmp file.
	static PTMAP PtmapReadNative(FNI *pfni, PGL pglclr = pvNil);

	// Writes a standalone TMAP-chunk file (not a .chk)
	bool FWriteTmapChkFile(PFNI pfniDst, bool fCompress, PMSNK pmsnkErr = pvNil);

	// Creates a TMAP from the width, height, and an array of bytes
	static PTMAP PtmapNew(byte *prgbPixels, long dxWidth, long dxHeight);

	// Some useful file methods
	long CbOnFile(void)
		{ return(size(TMAPF) + LwMul(_bpmp.row_bytes, _bpmp.height)); }
	bool FWrite(PBLCK pblck);

#ifdef NOT_YET_REVIEWED
	// Useful shade-table type method
	byte * PrgbBuildInverseTable(void);
#endif // NOT_YET_REVIEWED
	};

#endif // TMAP_H