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Date:: Mon Jun 19 13:51:14 2017 UTC
Message:: svgpic: new program to convert pic to svg This is an experiment. Like tpic it's a copy-and-paste fork of pic. Change-Id: Ia22772bd5881c7904a6d8f8e0b46fde8cea89cbd Reviewed-on: https://plan9port-review.googlesource.com/2920 Reviewed-by: Russ Cox <rsc@swtch.com>
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  1 3ebbd193 2017-06-19 rsc #include	<stdio.h>
  2 3ebbd193 2017-06-19 rsc #include	"pic.h"
  3 3ebbd193 2017-06-19 rsc #include	"y.tab.h"
  4 3ebbd193 2017-06-19 rsc 
  5 3ebbd193 2017-06-19 rsc obj *circgen(int type)
  6 3ebbd193 2017-06-19 rsc {
  7 3ebbd193 2017-06-19 rsc 	static double rad[2] = { HT2, WID2 };
  8 3ebbd193 2017-06-19 rsc 	static double rad2[2] = { HT2, HT2 };
  9 3ebbd193 2017-06-19 rsc 	int i, at, t, with, battr;
 10 3ebbd193 2017-06-19 rsc 	double xwith, ywith;
 11 3ebbd193 2017-06-19 rsc 	double r, r2, ddval, fillval;
 12 3ebbd193 2017-06-19 rsc 	obj *p, *ppos;
 13 3ebbd193 2017-06-19 rsc 	Attr *ap;
 14 3ebbd193 2017-06-19 rsc 
 15 3ebbd193 2017-06-19 rsc 	r = r2 = 0.0; /* Botch? (gcc) */
 16 3ebbd193 2017-06-19 rsc 
 17 3ebbd193 2017-06-19 rsc 	battr = at = 0;
 18 3ebbd193 2017-06-19 rsc 	with = xwith = ywith = fillval = ddval = 0;
 19 3ebbd193 2017-06-19 rsc 	t = (type == CIRCLE) ? 0 : 1;
 20 3ebbd193 2017-06-19 rsc 	if (type == CIRCLE)
 21 3ebbd193 2017-06-19 rsc 		r = r2 = getfval("circlerad");
 22 3ebbd193 2017-06-19 rsc 	else if (type == ELLIPSE) {
 23 3ebbd193 2017-06-19 rsc 		r = getfval("ellipsewid") / 2;
 24 3ebbd193 2017-06-19 rsc 		r2 = getfval("ellipseht") / 2;
 25 3ebbd193 2017-06-19 rsc 	}
 26 3ebbd193 2017-06-19 rsc 	for (i = 0; i < nattr; i++) {
 27 3ebbd193 2017-06-19 rsc 		ap = &attr[i];
 28 3ebbd193 2017-06-19 rsc 		switch (ap->a_type) {
 29 3ebbd193 2017-06-19 rsc 		case TEXTATTR:
 30 3ebbd193 2017-06-19 rsc 			savetext(ap->a_sub, ap->a_val.p);
 31 3ebbd193 2017-06-19 rsc 			break;
 32 3ebbd193 2017-06-19 rsc 		case RADIUS:
 33 3ebbd193 2017-06-19 rsc 			r = ap->a_val.f;
 34 3ebbd193 2017-06-19 rsc 			break;
 35 3ebbd193 2017-06-19 rsc 		case DIAMETER:
 36 3ebbd193 2017-06-19 rsc 		case WIDTH:
 37 3ebbd193 2017-06-19 rsc 			r = ap->a_val.f / 2;
 38 3ebbd193 2017-06-19 rsc 			break;
 39 3ebbd193 2017-06-19 rsc 		case HEIGHT:
 40 3ebbd193 2017-06-19 rsc 			r2 = ap->a_val.f / 2;
 41 3ebbd193 2017-06-19 rsc 			break;
 42 3ebbd193 2017-06-19 rsc 		case SAME:
 43 3ebbd193 2017-06-19 rsc 			r = rad[t];
 44 3ebbd193 2017-06-19 rsc 			r2 = rad2[t];
 45 3ebbd193 2017-06-19 rsc 			break;
 46 3ebbd193 2017-06-19 rsc 		case WITH:
 47 3ebbd193 2017-06-19 rsc 			with = ap->a_val.i;
 48 3ebbd193 2017-06-19 rsc 			break;
 49 3ebbd193 2017-06-19 rsc 		case AT:
 50 3ebbd193 2017-06-19 rsc 			ppos = ap->a_val.o;
 51 3ebbd193 2017-06-19 rsc 			curx = ppos->o_x;
 52 3ebbd193 2017-06-19 rsc 			cury = ppos->o_y;
 53 3ebbd193 2017-06-19 rsc 			at++;
 54 3ebbd193 2017-06-19 rsc 			break;
 55 3ebbd193 2017-06-19 rsc 		case INVIS:
 56 3ebbd193 2017-06-19 rsc 			battr |= INVIS;
 57 3ebbd193 2017-06-19 rsc 			break;
 58 3ebbd193 2017-06-19 rsc 		case NOEDGE:
 59 3ebbd193 2017-06-19 rsc 			battr |= NOEDGEBIT;
 60 3ebbd193 2017-06-19 rsc 			break;
 61 3ebbd193 2017-06-19 rsc 		case DOT:
 62 3ebbd193 2017-06-19 rsc 		case DASH:
 63 3ebbd193 2017-06-19 rsc 			battr |= ap->a_type==DOT ? DOTBIT : DASHBIT;
 64 3ebbd193 2017-06-19 rsc 			if (ap->a_sub == DEFAULT)
 65 3ebbd193 2017-06-19 rsc 				ddval = getfval("dashwid");
 66 3ebbd193 2017-06-19 rsc 			else
 67 3ebbd193 2017-06-19 rsc 				ddval = ap->a_val.f;
 68 3ebbd193 2017-06-19 rsc 			break;
 69 3ebbd193 2017-06-19 rsc 		case FILL:
 70 3ebbd193 2017-06-19 rsc 			battr |= FILLBIT;
 71 3ebbd193 2017-06-19 rsc 			if (ap->a_sub == DEFAULT)
 72 3ebbd193 2017-06-19 rsc 				fillval = getfval("fillval");
 73 3ebbd193 2017-06-19 rsc 			else
 74 3ebbd193 2017-06-19 rsc 				fillval = ap->a_val.f;
 75 3ebbd193 2017-06-19 rsc 			break;
 76 3ebbd193 2017-06-19 rsc 		}
 77 3ebbd193 2017-06-19 rsc 	}
 78 3ebbd193 2017-06-19 rsc 	if (type == CIRCLE)
 79 3ebbd193 2017-06-19 rsc 		r2 = r;	/* probably superfluous */
 80 3ebbd193 2017-06-19 rsc 	if (with) {
 81 3ebbd193 2017-06-19 rsc 		switch (with) {
 82 3ebbd193 2017-06-19 rsc 		case NORTH:	ywith = -r2; break;
 83 3ebbd193 2017-06-19 rsc 		case SOUTH:	ywith = r2; break;
 84 3ebbd193 2017-06-19 rsc 		case EAST:	xwith = -r; break;
 85 3ebbd193 2017-06-19 rsc 		case WEST:	xwith = r; break;
 86 3ebbd193 2017-06-19 rsc 		case NE:	xwith = -r * 0.707; ywith = -r2 * 0.707; break;
 87 3ebbd193 2017-06-19 rsc 		case SE:	xwith = -r * 0.707; ywith = r2 * 0.707; break;
 88 3ebbd193 2017-06-19 rsc 		case NW:	xwith = r * 0.707; ywith = -r2 * 0.707; break;
 89 3ebbd193 2017-06-19 rsc 		case SW:	xwith = r * 0.707; ywith = r2 * 0.707; break;
 90 3ebbd193 2017-06-19 rsc 		}
 91 3ebbd193 2017-06-19 rsc 		curx += xwith;
 92 3ebbd193 2017-06-19 rsc 		cury += ywith;
 93 3ebbd193 2017-06-19 rsc 	}
 94 3ebbd193 2017-06-19 rsc 	if (!at) {
 95 3ebbd193 2017-06-19 rsc 		if (isright(hvmode))
 96 3ebbd193 2017-06-19 rsc 			curx += r;
 97 3ebbd193 2017-06-19 rsc 		else if (isleft(hvmode))
 98 3ebbd193 2017-06-19 rsc 			curx -= r;
 99 3ebbd193 2017-06-19 rsc 		else if (isup(hvmode))
100 3ebbd193 2017-06-19 rsc 			cury += r2;
101 3ebbd193 2017-06-19 rsc 		else
102 3ebbd193 2017-06-19 rsc 			cury -= r2;
103 3ebbd193 2017-06-19 rsc 	}
104 3ebbd193 2017-06-19 rsc 	p = makenode(type, 2);
105 3ebbd193 2017-06-19 rsc 	p->o_val[0] = rad[t] = r;
106 3ebbd193 2017-06-19 rsc 	p->o_val[1] = rad2[t] = r2;
107 3ebbd193 2017-06-19 rsc 	if (r <= 0 || r2 <= 0) {
108 3ebbd193 2017-06-19 rsc 		ERROR "%s has invalid radius %g\n", (type==CIRCLE) ? "circle" : "ellipse", r<r2 ? r : r2 WARNING;
109 3ebbd193 2017-06-19 rsc 	}
110 3ebbd193 2017-06-19 rsc 	p->o_attr = battr;
111 3ebbd193 2017-06-19 rsc 	p->o_ddval = ddval;
112 3ebbd193 2017-06-19 rsc 	p->o_fillval = fillval;
113 3ebbd193 2017-06-19 rsc 	extreme(curx+r, cury+r2);
114 3ebbd193 2017-06-19 rsc 	extreme(curx-r, cury-r2);
115 3ebbd193 2017-06-19 rsc 	if (type == CIRCLE)
116 3ebbd193 2017-06-19 rsc 		dprintf("C %g %g %g\n", curx, cury, r);
117 3ebbd193 2017-06-19 rsc 	if (type == ELLIPSE)
118 3ebbd193 2017-06-19 rsc 		dprintf("E %g %g %g %g\n", curx, cury, r, r2);
119 3ebbd193 2017-06-19 rsc 	if (isright(hvmode))
120 3ebbd193 2017-06-19 rsc 		curx += r;
121 3ebbd193 2017-06-19 rsc 	else if (isleft(hvmode))
122 3ebbd193 2017-06-19 rsc 		curx -= r;
123 3ebbd193 2017-06-19 rsc 	else if (isup(hvmode))
124 3ebbd193 2017-06-19 rsc 		cury += r2;
125 3ebbd193 2017-06-19 rsc 	else
126 3ebbd193 2017-06-19 rsc 		cury -= r2;
127 3ebbd193 2017-06-19 rsc 	return(p);
128 3ebbd193 2017-06-19 rsc }