/************ I usually put these in a file called format.h ****/

#define LO_RES

#ifdef HI_RES
#define XMAX 640
#define YMAX 200
#define PLANES 6
#define MAXCOL 64
#define XASPECT 5
#define YASPECT 11
#endif HI_RES

#ifdef LO_RES
#define XMAX 320
#define YMAX 200
#define PLANES 6
#define MAXCOL 64
#define XASPECT 10
#define YASPECT 11
#endif LO_RES

/* EA handy make a long from 4 chars macros redone to work with Aztec*/
#define MAKE_ID(a, b, c, d)\
   ( ((long)(a)<<24) + ((long)(b)<<16) + ((long)(c)<<8) + (long)(d) )

/* these are the IFF types I deal with */
#define FORM MAKE_ID('F', 'O', 'R', 'M')
#define ILBM MAKE_ID('I', 'L', 'B', 'M')
#define BMHD MAKE_ID('B', 'M', 'H', 'D')
#define CMAP MAKE_ID('C', 'M', 'A', 'P')
#define BODY MAKE_ID('B', 'O', 'D', 'Y')

/* and these are the IFF types I ignore but don't squawk about */
#define GRAB MAKE_ID('G', 'R', 'A', 'B')
#define SPRT MAKE_ID('S', 'P', 'R', 'T')
#define CAMG MAKE_ID('C', 'A', 'M', 'G')
#define CRNG MAKE_ID('C', 'R', 'N', 'G')
#define CCRT MAKE_ID('C', 'C', 'R', 'T')
#define DPPS MAKE_ID('D', 'P', 'P', 'S')

/* Some macros for raster memory allocation ... redefine if you're
   sensible and manage memory locally */

/* ralloc - raster alloc*/
#define ralloc(amount)  (PLANEPTR)AllocMem((long)(amount), MEMF_CHIP)
/* rfree - raster free*/
#define rfree(pt, amount)   FreeMem( (pt), (long)(amount) )

/*line_bytes = the number of words * 2 (for bytes) a raster line takes up */
#define line_bytes(width)   (((width+15)>>4)<<1)

/* psize - plane size in bytes (an even number) of a raster given
   width and height */
#define psize(width, height) ( line_bytes(width)*height)

/* the place to throw excess bits */
#define bit_bucket(file, length) fseek(file, (long)(length), 1)


union bytes4
   {
   char b4_name[4];
   long b4_type;
   };

struct iff_chunk
   {
   union bytes4 iff_type;
   long iff_length;
   };

struct form_chunk
   {
   union bytes4 fc_type; /* == FORM */
   long fc_length;
   union bytes4 fc_subtype;
   };

struct BitMapHeader
   {
   UWORD w, h;
   UWORD x, y;
   UBYTE nPlanes;
   UBYTE masking;
   UBYTE compression;
   UBYTE pad1;
   UWORD transparentColor;
   UBYTE xAspect, yAspect;
   WORD pageWidth, pageHeight;
   };

struct crng
   {
   WORD pad1,rate,active;
   UBYTE low,high;
   };

/*ILBM_info is the structure read_iff returns, and is hopefully all
  you need to deal with out of the iff reader routines below*/
struct ILBM_info
   {
   struct BitMapHeader header;
   UBYTE cmap[MAXCOL*3];   /*say hey aztec don't like odd length structures*/
   struct BitMap bitmap;
   long camg;
   struct crng crng[6];
   };

/* I sure wish C function "prototypes" were real and not just ANSI */
extern struct ILBM_info *read_iff();  /* read_iff( char *filename ); */
extern void free_planes();      /* free_planes( struct BitMap *bitmap); */
extern int write_iff();
/* write_iff(char *name, unsigned char *colors, struct BitMap *bits,
   short xoff, short yoff, short width, short compressed); */



/* Anyone know where some useful minterms are defined? */
#define COPY_MINTERM      0xc0

/***

      A meditation for the guru from the Diamond Sutra -

      So shall you think of all this fleeting world:
      A star at dawn, a bubble in a stream;
      A flash of lightning in a summer cloud,
      A flickering lamp, a phantom, and a dream.

***/