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#ifndef lint
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static const char RCSid[] = "$Id: metacalls.c,v 1.4 2004/03/16 15:55:27 greg Exp $";
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#endif
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/*
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* metacalls.c - functional interface to metafile.
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*
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* 2/24/86
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*/
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#include "meta.h"
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#include "plot.h"
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#define RIGHT 0
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#define UP 1
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#define LEFT 2
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#define DOWN 3
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#define pflush() if (inpoly) closepoly()
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#define putdec(v) if (v) decival(v); else *cap++ = '0';
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static int curx = 0;
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static int cury = 0;
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static int cura0 = 0;
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static int inpoly = FALSE;
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static char curargs[MAXARGS] = "";
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static char *cap;
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static int let_dir( register int c);
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static void closepoly(void);
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static void polyval( register int x, register int y);
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static void decival( register int v);
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void
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mendpage(void) /* end of page */
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{
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pflush();
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pglob(PEOP, 0200, NULL);
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}
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void
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mdone(void) /* end of graphics metafile */
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{
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pflush();
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pglob(PEOF, 0200, NULL);
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}
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void
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minclude( /* include a file */
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char *fname
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)
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{
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pflush();
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pglob(PINCL, 1, fname);
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}
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void
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msetpat( /* set a pattern */
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int pn,
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char *pat
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)
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{
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pflush();
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pglob(PSET, pn+4, pat);
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}
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void
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mopenseg( /* open a segment */
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char *sname
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)
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{
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pflush();
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pglob(POPEN, 0, sname);
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}
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void
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mcloseseg(void) /* close current segment */
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{
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pflush();
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pglob(PCLOSE, 0200, NULL);
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}
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void
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mline( /* start a line */
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int x, int y,
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int type, int thick, int color
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)
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{
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pflush();
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cura0 = (type<<4 & 060) | (thick<<2 & 014) | (color & 03);
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curx = x;
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cury = y;
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}
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void
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mrectangle( /* fill a rectangle */
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int xmin, int ymin, int xmax, int ymax,
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int pat, int color
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)
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{
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pflush();
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cura0 = (pat<<2 & 014) | (color & 03);
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pprim(PRFILL, cura0, xmin, ymin, xmax, ymax, NULL);
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}
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void
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mtriangle( /* fill a triangle */
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int xmin, int ymin, int xmax, int ymax,
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int d, int pat, int color
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)
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{
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pflush();
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cura0 = (let_dir(d)<<4 & 060) | (pat<<2 & 014) | (color & 03);
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pprim(PTFILL, cura0, xmin, ymin, xmax, ymax, NULL);
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}
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void
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mpoly( /* start a polygon */
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int x, int y,
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int border, int pat, int color
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)
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{
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pflush();
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cura0 = (border<<6 & 0100) | (pat<<2 & 014) | (color & 03);
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cap = curargs;
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inpoly = TRUE;
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putdec(x);
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*cap++ = ' ';
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putdec(y);
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}
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void
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mtext( /* matrix string */
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int x, int y,
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char *s,
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int cpi,
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int color
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)
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{
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pflush();
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cura0 = (color & 03);
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if (cpi < 10) {
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cura0 += 04;
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cpi *= 2;
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}
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if (cpi > 11)
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cura0 += 020;
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if (cpi > 14)
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cura0 += 020;
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if (cpi > 18)
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cura0 += 020;
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pprim(PMSTR, cura0, x, y, x, y, s);
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}
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void
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mvstr( /* vector string */
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int xmin, int ymin, int xmax, int ymax,
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char *s,
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int d, int thick, int color
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)
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{
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pflush();
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cura0 = (let_dir(d)<<4 & 060) | (thick<<2 & 014) | (color & 03);
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pprim(PVSTR, cura0, xmin, ymin, xmax, ymax, s);
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}
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void
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msegment( /* segment */
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int xmin, int ymin, int xmax, int ymax,
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char *sname,
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int d, int thick, int color
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)
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{
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pflush();
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cura0 = (let_dir(d)<<4 & 060) | (thick<<2 & 014) | (color & 03);
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pprim(PSEG, cura0, xmin, ymin, xmax, ymax, sname);
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}
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void
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mdraw( /* draw to next point */
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int x, int y
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)
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{
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if (inpoly) {
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polyval(x, y);
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} else if (x != curx || y != cury) {
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plseg(cura0, curx, cury, x, y);
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curx = x;
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cury = y;
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}
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}
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static void
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decival( /* add value to polygon */
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register int v
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)
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{
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if (!v)
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return;
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decival(v/10);
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*cap++ = v%10 + '0';
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}
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static void
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polyval( /* add vertex to a polygon */
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register int x,
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register int y
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)
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{
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*cap++ = ' ';
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putdec(x);
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*cap++ = ' ';
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putdec(y);
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}
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static void
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closepoly(void) /* close current polygon */
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{
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*cap = '\0';
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pprim(PPFILL, cura0, 0, 0, XYSIZE-1, XYSIZE-1, curargs);
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inpoly = FALSE;
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}
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static int
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let_dir( /* convert letter to corresponding direction */
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register int c
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)
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{
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switch (c) {
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case 'R':
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case 'r':
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return(RIGHT);
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case 'U':
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case 'u':
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return(UP);
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case 'L':
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case 'l':
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return(LEFT);
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case 'D':
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case 'd':
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return(DOWN);
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}
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return(0);
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}
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