From 3ebbd193dce0724e106ec9af627a3782676ae510 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Mon, 3 Apr 2017 23:12:14 -0400
Subject: 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>
---
 src/cmd/svgpic/boxgen.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/cmd/svgpic/boxgen.c

(limited to 'src/cmd/svgpic/boxgen.c')

diff --git a/src/cmd/svgpic/boxgen.c b/src/cmd/svgpic/boxgen.c
new file mode 100644
index 00000000..b575cd2f
--- /dev/null
+++ b/src/cmd/svgpic/boxgen.c
@@ -0,0 +1,115 @@
+#include	<stdio.h>
+#include	"pic.h"
+#include	"y.tab.h"
+
+obj *boxgen(void)
+{
+	static double prevh = HT;
+	static double prevw = WID;	/* golden mean, sort of */
+	int i, at, battr, with;
+	double ddval, fillval, xwith, ywith;
+	double h, w, x0, y0, x1, y1;
+	obj *p, *ppos;
+	Attr *ap;
+
+	h = getfval("boxht");
+	w = getfval("boxwid");
+	at = battr = with = 0;
+	ddval = fillval = xwith = ywith = 0;
+	for (i = 0; i < nattr; i++) {
+		ap = &attr[i];
+		switch (ap->a_type) {
+		case HEIGHT:
+			h = ap->a_val.f;
+			break;
+		case WIDTH:
+			w = ap->a_val.f;
+			break;
+		case SAME:
+			h = prevh;
+			w = prevw;
+			break;
+		case WITH:
+			with = ap->a_val.i;	/* corner */
+			break;
+		case AT:
+			ppos = ap->a_val.o;
+			curx = ppos->o_x;
+			cury = ppos->o_y;
+			at++;
+			break;
+		case INVIS:
+			battr |= INVIS;
+			break;
+		case NOEDGE:
+			battr |= NOEDGEBIT;
+			break;
+		case DOT:
+		case DASH:
+			battr |= ap->a_type==DOT ? DOTBIT : DASHBIT;
+			if (ap->a_sub == DEFAULT)
+				ddval = getfval("dashwid");
+			else
+				ddval = ap->a_val.f;
+			break;
+		case FILL:
+			battr |= FILLBIT;
+			if (ap->a_sub == DEFAULT)
+				fillval = getfval("fillval");
+			else
+				fillval = ap->a_val.f;
+			break;
+		case TEXTATTR:
+			savetext(ap->a_sub, ap->a_val.p);
+			break;
+		}
+	}
+	if (with) {
+		switch (with) {
+		case NORTH:	ywith = -h / 2; break;
+		case SOUTH:	ywith = h / 2; break;
+		case EAST:	xwith = -w / 2; break;
+		case WEST:	xwith = w / 2; break;
+		case NE:	xwith = -w / 2; ywith = -h / 2; break;
+		case SE:	xwith = -w / 2; ywith = h / 2; break;
+		case NW:	xwith = w / 2; ywith = -h / 2; break;
+		case SW:	xwith = w / 2; ywith = h / 2; break;
+		}
+		curx += xwith;
+		cury += ywith;
+	}
+	if (!at) {
+		if (isright(hvmode))
+			curx += w / 2;
+		else if (isleft(hvmode))
+			curx -= w / 2;
+		else if (isup(hvmode))
+			cury += h / 2;
+		else
+			cury -= h / 2;
+	}
+	x0 = curx - w / 2;
+	y0 = cury - h / 2;
+	x1 = curx + w / 2;
+	y1 = cury + h / 2;
+	extreme(x0, y0);
+	extreme(x1, y1);
+	p = makenode(BOX, 2);
+	p->o_val[0] = w;
+	p->o_val[1] = h;
+	p->o_attr = battr;
+	p->o_ddval = ddval;
+	p->o_fillval = fillval;
+	dprintf("B %g %g %g %g at %g %g, h=%g, w=%g\n", x0, y0, x1, y1, curx, cury, h, w);
+	if (isright(hvmode))
+		curx = x1;
+	else if (isleft(hvmode))
+		curx = x0;
+	else if (isup(hvmode))
+		cury = y1;
+	else
+		cury = y0;
+	prevh = h;
+	prevw = w;
+	return(p);
+}
-- 
cgit v1.2.3