r_data.h

#ifndef __R_DATA__
#define __R_DATA__

#include "r_defs.h"
#include "r_state.h"

#ifdef __GNUG__
#pragma interface
#endif

// A single patch from a texture definition,
//  basically a rectangular area within
//  the texture rectangle.
typedef struct
{
    // Block origin (allways UL),
    // which has allready accounted
    // for the internal origin of the patch.
    int		originx;	
    int		originy;
    int		patch;
} texpatch_t;


// A maptexturedef_t describes a rectangular texture,
//  which is composed of one or more mappatch_t structures
//  that arrange graphic patches.
typedef struct
{
    // Keep name for switch changing, etc.
    char	name[8];		
    short	width;
    short	height;
    
    // All the patches[patchcount]
    //  are drawn back to front into the cached texture.
    short	patchcount;
    texpatch_t	patches[1];		
    
} texture_t;

extern int		numtextures;
extern texture_t**	textures;

// Retrieve column data for span blitting.
byte*
R_GetColumn
( int		tex,
  int		col );


// I/O, setting up the stuff.
void R_InitData (void);
void R_PrecacheLevel (void);


// Retrieval.
// Floor/ceiling opaque texture tiles,
// lookup by name. For animation?
int R_FlatNumForName (char* name);


// Called by P_Ticker for switches and animations,
// returns the texture number for the texture name.
int R_TextureNumForName (char *name);
int R_CheckTextureNumForName (char *name);

#endif