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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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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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|
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#include "meta.h" |
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|
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|
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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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|
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#define pflush() if (inpoly) closepoly() |
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|
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#define putdec(v) if (v) decival(v); else *cap++ = '0'; |
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|
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|
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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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|
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|
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mendpage() /* 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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|
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|
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mdone() /* 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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|
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|
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minclude(fname) /* include a file */ |
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char *fname; |
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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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|
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|
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msetpat(pn, pat) /* set a pattern */ |
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int pn; |
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char *pat; |
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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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|
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|
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mopenseg(sname) /* open a segment */ |
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char *sname; |
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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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|
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|
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mcloseseg() /* 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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|
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|
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mline(x, y, type, thick, color) /* start a line */ |
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int x, y; |
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int type, thick, color; |
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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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|
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|
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mrectangle(xmin, ymin, xmax, ymax, pat, color) /* fill a rectangle */ |
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int xmin, ymin, xmax, ymax; |
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int pat, color; |
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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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|
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|
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mtriangle(xmin, ymin, xmax, ymax, d, pat, color) /* fill a triangle */ |
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int xmin, ymin, xmax, ymax; |
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int d, pat, color; |
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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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|
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|
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mpoly(x, y, border, pat, color) /* start a polygon */ |
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int x, y; |
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int border, pat, color; |
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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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|
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|
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mtext(x, y, s, cpi, color) /* matrix string */ |
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int x, 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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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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|
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|
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mvstr(xmin, ymin, xmax, ymax, s, d, thick, color) /* vector string */ |
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int xmin, ymin, xmax, ymax; |
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char *s; |
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int d, thick, color; |
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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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|
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|
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msegment(xmin, ymin, xmax, ymax, sname, d, thick, color) /* segment */ |
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int xmin, ymin, xmax, ymax; |
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char *sname; |
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int d, thick, color; |
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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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|
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|
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mdraw(x, y) /* draw to next point */ |
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int x, y; |
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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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|
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|
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static |
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decival(v) /* add value to polygon */ |
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register int v; |
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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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|
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|
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static |
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polyval(x, y) /* add vertex to a polygon */ |
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register int x, y; |
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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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|
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|
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static |
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closepoly() /* 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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|
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|
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static int |
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let_dir(c) /* convert letter to corresponding direction */ |
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register int c; |
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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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} |
