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#ifndef lint |
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static const char RCSid[] = "$Id: expand.c,v 1.3 2003/07/21 22:30:18 schorsch Exp $"; |
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#endif |
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/* |
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* Expansion routine for command implementation |
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* on simple drivers |
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*/ |
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|
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#include <string.h> |
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|
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#include "meta.h" |
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|
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/* vector characters file */ |
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#define VINPUT "vchars.mta" |
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|
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#define FIRSTCHAR ' ' /* first vector character */ |
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|
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#define LASTCHAR '~' /* last vector character */ |
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|
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#define PEPS 5 /* minimum size for fill area */ |
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|
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#define fillok(p) ((p)->xy[XMX] - (p)->xy[XMN] > PEPS && \ |
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(p)->xy[YMX] - (p)->xy[YMN] > PEPS) |
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|
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|
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|
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static short *xlist; /* pointer to expansion list */ |
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|
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static void exfile(FILE *fp); |
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static void exprim(PRIMITIVE *p); |
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static void sendmstr(register PRIMITIVE *p); |
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static void sendvstr(register PRIMITIVE *p); |
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static void include(int code, char *fname); |
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static void polyfill(PRIMITIVE *p); |
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static void polyedge(PRIMITIVE *p, int x1, int y1, int x2, int y2); |
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|
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|
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void |
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expand( /* expand requested commands */ |
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FILE *infp, |
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short *exlist |
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) |
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{ |
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static PRIMITIVE pincl = {PINCL, 02, {-1, -1, -1, -1}, VINPUT, NULL}; |
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static short vcloaded = FALSE; |
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|
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xlist = exlist; |
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|
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if (exlist[comndx(PVSTR)] == 1 && !vcloaded) { |
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vcloaded = TRUE; |
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exprim(&pincl); |
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} |
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|
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exfile(infp); |
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|
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if (inseg()) |
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error(USER, "unclosed segment in expand"); |
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|
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} |
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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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exfile( /* expand the given file */ |
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register FILE *fp |
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) |
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{ |
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PRIMITIVE curp; |
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|
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while (readp(&curp, fp)) { |
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exprim(&curp); |
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fargs(&curp); |
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} |
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|
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} |
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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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exprim( /* expand primitive */ |
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register PRIMITIVE *p |
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) |
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{ |
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int xflag = xlist[comndx(p->com)]; |
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/* 1==expand, 0==pass, -1==discard */ |
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if (xflag != -1) { |
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if (xflag == 1) |
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switch (p->com) { |
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|
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case POPEN: |
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openseg(p->args); |
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break; |
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|
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case PSEG: |
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segment(p, exprim); |
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break; |
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|
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case PCLOSE: |
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closeseg(); |
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break; |
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|
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case PINCL: |
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include(p->arg0, p->args); |
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break; |
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|
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case PMSTR: |
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sendmstr(p); |
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break; |
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|
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case PVSTR: |
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sendvstr(p); |
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break; |
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|
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case PPFILL: |
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polyfill(p); |
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break; |
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|
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default: |
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sprintf(errmsg, "unsupported command '%c' in exprim", p->com); |
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error(WARNING, errmsg); |
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break; |
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} |
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else if (inseg()) |
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segprim(p); |
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else |
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writep(p, stdout); |
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} |
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} |
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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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sendmstr( /* expand a matrix string */ |
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register PRIMITIVE *p |
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) |
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{ |
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PRIMITIVE pout; |
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int cheight, cwidth, cthick, ccol; |
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|
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cheight = 350; |
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if (p->arg0 & 010) |
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cheight *= 2; |
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cwidth = (6 - ((p->arg0 >> 4) & 03)) * 35; |
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if (p->arg0 & 04) |
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cwidth *= 2; |
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cthick = (p->arg0 & 0100) ? 1 : 0; |
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ccol = p->arg0 & 03; |
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|
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pout.com = PVSTR; |
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pout.arg0 = (cthick << 2) | ccol; |
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pout.xy[XMN] = p->xy[XMN]; |
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pout.xy[YMN] = p->xy[YMX] - cheight/2; |
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pout.xy[XMX] = p->xy[XMN] + strlen(p->args)*cwidth; |
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if (pout.xy[XMX] >= XYSIZE) |
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pout.xy[XMX] = XYSIZE-1; |
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pout.xy[YMX] = p->xy[YMX] + cheight/2; |
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pout.args = p->args; |
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|
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exprim(&pout); |
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|
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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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sendvstr( /* expand a vector string */ |
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register PRIMITIVE *p |
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) |
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{ |
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PRIMITIVE pout; |
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int xadv = 0, yadv = 0; |
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char s[3]; |
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register char *cp; |
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|
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if (p->args == NULL) |
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error(USER, "illegal empty string in sendvstr"); |
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|
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pout.com = PSEG; |
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pout.arg0 = p->arg0; |
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switch (p->arg0 & 060) { |
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case 0: /* right */ |
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xadv = (p->xy[XMX] - p->xy[XMN])/strlen(p->args); |
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pout.xy[XMN] = p->xy[XMN]; |
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pout.xy[XMX] = p->xy[XMN] + xadv; |
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yadv = 0; |
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pout.xy[YMN] = p->xy[YMN]; |
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pout.xy[YMX] = p->xy[YMX]; |
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break; |
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case 020: /* up */ |
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xadv = 0; |
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pout.xy[XMN] = p->xy[XMN]; |
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pout.xy[XMX] = p->xy[XMX]; |
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yadv = (p->xy[YMX] - p->xy[YMN])/strlen(p->args); |
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pout.xy[YMN] = p->xy[YMN]; |
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pout.xy[YMX] = p->xy[YMN] + yadv; |
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break; |
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case 040: /* left */ |
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xadv = -(p->xy[XMX] - p->xy[XMN])/strlen(p->args); |
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pout.xy[XMN] = p->xy[XMX] + xadv; |
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pout.xy[XMX] = p->xy[XMX]; |
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yadv = 0; |
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pout.xy[YMN] = p->xy[YMN]; |
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pout.xy[YMX] = p->xy[YMX]; |
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break; |
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case 060: /* down */ |
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xadv = 0; |
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pout.xy[XMN] = p->xy[XMN]; |
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pout.xy[XMX] = p->xy[XMX]; |
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yadv = -(p->xy[YMX] - p->xy[YMN])/strlen(p->args); |
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pout.xy[YMN] = p->xy[YMX] + yadv; |
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pout.xy[YMX] = p->xy[YMX]; |
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break; |
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} |
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|
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pout.args = s; |
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s[1] = '\''; |
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s[2] = '\0'; |
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for (cp = p->args; *cp; cp++) |
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if (*cp < FIRSTCHAR || *cp > LASTCHAR) { |
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sprintf(errmsg, "unknown character (%d) in sendvstr", *cp); |
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error(WARNING, errmsg); |
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} |
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else { |
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s[0] = *cp; |
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exprim(&pout); |
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pout.xy[XMN] += xadv; |
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pout.xy[XMX] += xadv; |
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pout.xy[YMN] += yadv; |
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pout.xy[YMX] += yadv; |
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} |
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|
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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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include( /* load an include file */ |
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int code, |
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char *fname |
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) |
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{ |
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register FILE *fp = NULL; |
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|
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if (fname == NULL) |
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error(USER, "missing include file name in include"); |
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|
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if (code == 2 || (fp = fopen(fname, "r")) == NULL) { |
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if (code != 0) |
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fp = mfopen(fname, "r"); |
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else { |
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sprintf(errmsg, "cannot open user include file \"%s\"", fname); |
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error(USER, errmsg); |
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} |
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} |
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|
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exfile(fp); |
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fclose(fp); |
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|
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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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polyfill( /* expand polygon fill command */ |
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PRIMITIVE *p |
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) |
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{ |
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char firstx, firsty, x, y; |
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int lastx, lasty; |
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register char *cp; |
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|
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if ((cp=nextscan(nextscan(p->args,"%d",&firstx),"%d",&firsty)) == NULL) { |
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sprintf(errmsg, "illegal polygon spec \"%s\" in polyfill", p->args); |
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error(WARNING, errmsg); |
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return; |
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} |
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|
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lastx = firstx; |
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lasty = firsty; |
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|
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while ((cp=nextscan(nextscan(cp,"%d",&x),"%d",&y)) != NULL) { |
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|
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polyedge(p, lastx, lasty, x, y); |
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lastx = x; |
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lasty = y; |
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} |
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|
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polyedge(p, lastx, lasty, firstx, firsty); |
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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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polyedge( /* expand edge of polygon */ |
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PRIMITIVE *p, |
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int x1, int y1, int x2, int y2 |
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) |
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{ |
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int reverse; |
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PRIMITIVE pin, pout; |
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|
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if (x1 < x2) { |
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pin.xy[XMN] = x1; |
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pin.xy[XMX] = x2; |
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reverse = FALSE; |
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} else { |
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pin.xy[XMN] = x2; |
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pin.xy[XMX] = x1; |
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reverse = TRUE; |
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} |
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|
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if (y1 < y2) { |
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pin.xy[YMN] = y1; |
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pin.xy[YMX] = y2; |
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} else { |
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pin.xy[YMN] = y2; |
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pin.xy[YMX] = y1; |
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reverse = y1 > y2 && !reverse; |
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} |
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|
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pout.xy[XMN] = xlate(XMN, &pin, p); |
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pout.xy[XMX] = xlate(XMX, &pin, p); |
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pout.xy[YMN] = xlate(YMN, &pin, p); |
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pout.xy[YMX] = xlate(YMX, &pin, p); |
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pout.com = PTFILL; |
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pout.arg0 = 0100 | (reverse << 4) | (p->arg0 & 017); |
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pout.args = NULL; |
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if (fillok(&pout)) |
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exprim(&pout); |
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|
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if (p->arg0 & 0100) { /* draw border */ |
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pout.com = PLSEG; |
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pout.arg0 = reverse << 6; |
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exprim(&pout); |
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} |
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|
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pout.com = PRFILL; |
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pout.arg0 = 0100 | (p->arg0 & 017); |
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pout.xy[XMN] = pout.xy[XMX]; |
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pout.xy[XMX] = p->xy[XMX]; |
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if (fillok(&pout)) |
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exprim(&pout); |
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|
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} |
