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#ifndef lint |
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static const char RCSid[] = "$Id: metacalls.c,v 1.1 2003/02/22 02:07:26 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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|
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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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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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|
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
