/*
** Copyright (c) 1997, 3Dfx Interactive, Inc.
** All Rights Reserved.
**
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of 3Dfx Interactive, Inc.;
** the contents of this file may not be disclosed to third parties, copied or
** duplicated in any form, in whole or in part, without the prior written
** permission of 3Dfx Interactive, Inc.
**
** RESTRICTED RIGHTS LEGEND:
** Use, duplication or disclosure by the Government is subject to restrictions
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished  -
** rights reserved under the Copyright Laws of the United States.
**
**
** $Revision: 1 $ 
** $Date: 7/30/97 12:49p $ 
**
*/


#ifndef _PLIB_H_
#define _PLIB_H_

#ifdef __cplusplus
extern "C" {
#endif

typedef enum { topOfMipMap, btmOfMipMap } mipMapEnd_t;

typedef FxU8 hTexId_t;
#define H_NULL 0x0
#define H_FSTTEXID 0x1

typedef struct {
  unsigned int isDownloadable  : 1;  /* should tex be downloaded? */
  unsigned int isMultibase     : 1;  /* downloaded as multibase? */
  unsigned int isTrilinear     : 1;  /* downloaded as EVEN/ODD? */
  unsigned int isBeenPopd      : 1;  /* has it been pop'd? - not used */
  unsigned int isDirty         : 1;  /* has it been touched? - not used */
}  tlTxMnFlags_t;
	
typedef struct {
  TlTexture*  lpTlTextureInfo;
  GrLOD_t     origLargeLod;  /* for pop 'n' push */
  GrLOD_t     origSmallLod;  /* for pop 'n' push */
	 /* I need a min of 5 start addresses worst case - Trilinear Multibase
	 ** The unions contain start addresses that are mutually exclusive 
	 ** ps, if the order of these unions ever change, some shit will seriously 
	 ** break, especially in plTxMnTexSource() */
  union u0_u {  /* can you believe softice doesn't understand unnamed unions? */
    FxU32   bothAdd;        /* BOTH linear start */
    FxU32   evenAdd;        /* EVEN linear start */
    FxU32   multiR0Add;     /* BOTH multi 1st range start */
    FxU32   multiR0EvenAdd; /* EVEN multi 1st range start */
  }  u0;
  union u1_u {
    FxU32  oddAdd;         /* ODD linear start */
    FxU32  multiR1Add;     /* BOTH multi 2nd range start */
    FxU32  multiR1OddAdd;  /* ODD multi 2nd range start */
  } u1;
  union u2_u {
    FxU32  multiR2Add;     /* BOTH multi 3rd range start */
    FxU32  multiR2EvenAdd; /* EVEN multi 3rd range start */
  } u2;
  union u3_u {
    FxU32  multiR3Add;     /* BOTH multi 4th range start */
    FxU32  multiR3OddAdd;  /* EVEN multi 4th range start */
  } u3;
  union u4_u {
    FxU32  multiR3EvenAdd;  /* ODD multi 4th range start */
  } u4;	/* just for consistency */
  tlTxMnFlags_t		flags; 
} tlTxMnTexture_t;				

/* exposed function prototypes for TxMn */
hTexId_t plTxMnLoadTxMngr( TlTexture* lpTexture );
void plTxMnDownloadAll( );
void plTxMnTexSource( hTexId_t deTexId, FxU32 deMipMask );
void plTxMnReset( hTexId_t deTexId );
void plTxMnSetDownload( hTexId_t theTexId, FxBool bDownLoad );
FxBool plTxMnGetMultibase( hTexId_t deTexId );
void plTxMnSetMultibase( hTexId_t deTexId, FxBool bMultibase );
FxBool plTxMnGetTrilinear( hTexId_t deTexId );
void plTxMnSetTrilinear( hTexId_t theTexId, FxBool bTrilinear );
FxBool plTxMnGetMultiRevOrder( );
void plTxMnSetMultiOffsetFix( FxBool bOffsetFix );
FxBool plTxMnGetMultiOffsetFix( );
void plTxMnSetMultiRevOrder( FxBool bOrder );
void plTxMnGetInfo( hTexId_t deTexHndl, GrTexInfo *deGrTexInfo );
void plTxMnDwnldMipMapLod( hTexId_t dstTexId, hTexId_t srcTexId, GrLOD_t deLod );
void plTxMnDwnldMipMapLodPrtl( hTexId_t dstTexId, hTexId_t srcTexId, GrLOD_t deLod,
                               int nFstRow, int nLstRow );
                               
/* public helper function prototypes */
void plPopLod( hTexId_t hCurrTexture, mipMapEnd_t mipMapEnd );
void plPushLod( hTexId_t hCurrTexture, mipMapEnd_t mipMapEnd );
void plCreateTlTexture( TlTexture *disTlTexture, FxU16 daColors[] );

/* static helper prototypes */
static void prSetBeenPopd( hTexId_t deTexId, FxBool bBeenPopd );
static FxU32 prGetLodSize( GrTexInfo *const disTexInfo, GrLOD_t disLOD );
static FxU32 prTexMultiMemRequired( FxU32 deMipMask, GrTexBaseRange_t deRange,
																		GrTexInfo* deTexInfo );
static void prGetLod( GrTexInfo *lpTexInfo, GrLOD_t deLod, void *data );
static void prPopLod( GrTexInfo *lpDeTexInfo, mipMapEnd_t deMipMapEnd );
static void prPushLod( GrTexInfo *lpDeTexInfo, mipMapEnd_t deMipMapEnd );
static FxU32 prGetTxMnAdd( hTexId_t deTexId, GrLOD_t deLod );
static int prGetLodWidth( GrLOD_t lod, GrAspectRatio_t aspect );
static int prGetLodHeight( GrLOD_t lod, GrAspectRatio_t aspect );
static FxU32 prGetMultiMemBump( const GrTexInfo *const deTexInfo, 
                                  GrTexBaseRange_t deTexBase,
                                  FxU32 deMipMask );




/* some macros to play with the bit fields */
#define IS_DOWNLOADABLE( tex ) (tex).flags.isDownloadable ? FXTRUE : FXFALSE
#define IS_MULTIBASE( tex ) (tex).flags.isMultibase ? FXTRUE : FXFALSE
#define IS_BEENPOPD( tex ) (tex).flags.isBeenPopd ? FXTRUE : FXFALSE
#define IS_TRILINEAR( tex ) (tex).flags.isTrilinear ? FXTRUE : FXFALSE
#define IS_DIRTY( tex ) (tex).flags.isDirty ? FXTRUE : FXFALSE
#define SET_DOWNLOADABLE( tex, b ) (tex).flags.isDownloadable = b
#define SET_MULTIBASE( tex, b ) (tex).flags.isMultibase = b
#define SET_TRILINEAR( tex, b ) (tex).flags.isTrilinear = b
#define SET_BEENPOPD( tex, b ) (tex).flags.isBeenPopd = b
#define SET_DIRTY( tex, b ) (tex).flags.isDirty = b


#ifdef NDEBUG
#undef NDEBUG
#endif

#ifdef __cplusplus
}
#endif
#endif
