src/meta/rast.h

/* RCSid: $Id$ */
/*
 *   Structures for line segment output to raster files
 */

#define  NUMSCANS       16              /* number of scanlines per block */

typedef struct {                        /* raster scanline block */
              unsigned char  *cols[NUMSCANS];
              int  ybot, ytop;                  /* ybot is scan[0] */
              int  xleft, xright;
              int  width;
              } SCANBLOCK;

extern int  ydown;                      /* y going down? */

extern int  minwidth;                   /* minimum line width */

extern SCANBLOCK  outblock;             /* output span */

#define  IBLK   0               /* index for black */
#define  IRED   1
#define  IGRN   2
#define  IBLU   3
#define  IYEL   4
#define  IMAG   5
#define  ICYN   6
#define  IWHT   7

#define  pixtog(x,y,c)  { register unsigned char \
                *cp = outblock.cols[(y)-outblock.ybot]+(x); \
                *cp = ((~*cp ^ (c)<<3)&070) | (*cp&07); }

#define  pixmix(x,y,c)  (outblock.cols[(y)-outblock.ybot][x] &= 070|(c))

#define  someabove(p,y) (CONV((p)->xy[YMX],dysize) > (y))
#define  somebelow(p,y) (CONV((p)->xy[YMN],dysize) < (y))

#define  inthis(p)      (ydown ? someabove(p,outblock.ybot-1) : \
                                somebelow(p,outblock.ytop+1))
#define  innext(p)      (ydown ? somebelow(p,outblock.ybot) : \
                                someabove(p,outblock.ytop))
Revision:	1.1
Committed:	Sat Feb 22 02:07:26 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	/* RCSid: $Id$ */
2	/*
3	* Structures for line segment output to raster files
4	*/
5
6	#define NUMSCANS 16 /* number of scanlines per block */
7
8	typedef struct { /* raster scanline block */
9	unsigned char *cols[NUMSCANS];
10	int ybot, ytop; /* ybot is scan[0] */
11	int xleft, xright;
12	int width;
13	} SCANBLOCK;
14
15	extern int ydown; /* y going down? */
16
17	extern int minwidth; /* minimum line width */
18
19	extern SCANBLOCK outblock; /* output span */
20
21	#define IBLK 0 /* index for black */
22	#define IRED 1
23	#define IGRN 2
24	#define IBLU 3
25	#define IYEL 4
26	#define IMAG 5
27	#define ICYN 6
28	#define IWHT 7
29
30	#define pixtog(x,y,c) { register unsigned char \
31	*cp = outblock.cols[(y)-outblock.ybot]+(x); \
32	cp = ((~cp ^ (c)<<3)&070) \| (*cp&07); }
33
34	#define pixmix(x,y,c) (outblock.cols[(y)-outblock.ybot][x] &= 070\|(c))
35
36	#define someabove(p,y) (CONV((p)->xy[YMX],dysize) > (y))
37	#define somebelow(p,y) (CONV((p)->xy[YMN],dysize) < (y))
38
39	#define inthis(p) (ydown ? someabove(p,outblock.ybot-1) : \
40	somebelow(p,outblock.ytop+1))
41	#define innext(p) (ydown ? somebelow(p,outblock.ybot) : \
42	someabove(p,outblock.ytop))