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svgpic: new program to convert pic to svg

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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>
This commit is contained in:
Russ Cox 2017-04-03 23:12:14 -04:00
parent a9530c00e8
commit 3ebbd193dc
19 changed files with 4034 additions and 0 deletions
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115
src/cmd/svgpic/boxgen.c Normal file
View file

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#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);
}