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 (22 years, 8 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
#	User	Rev	Content
1	greg	1.1	/* 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))