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jiff.h
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C/C++ Source or Header
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1992-09-02
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3KB
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112 lines
/* --------------------------------------------------------------------- */
#define LO_RES
#ifdef HI_RES
#define XMAX 640
#define YMAX 200
#define PLANES 4
#define MAXCOL (1<<PLANES)
#define XASPECT 5
#define YASPECT 11
#endif
#ifdef LO_RES
#define XMAX 320
#define YMAX 200
#define PLANES 5
#define MAXCOL (1<<PLANES)
#define XASPECT 10
#define YASPECT 11
#endif
/* --------------------------------------------------------------------- */
/* 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 DEST MAKE_ID('D', 'E', 'S', 'T')
#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')
/* --------------------------------------------------------------------- */
/* 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;
};
/*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;
};
/* --------------------------------------------------------------------- */
struct ILBM_info *read_iff(char *, struct ILBM_info *, short);
int write_iff(char *, unsigned char *, register struct BitMap *, short, short, short, short);
void free_planes(register struct BitMap *);
/* Anyone know where some useful minterms are defined? */
#define COPY_MINTERM 0xc0