fz_rect
fz_bound_path(fz_path *path, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_point p;
fz_rect r = fz_empty_rect;
int i = 0;
if (path->len)
{
p.x = path->items[1].v;
p.y = path->items[2].v;
p = fz_transform_point(ctm, p);
r.x0 = r.x1 = p.x;
r.y0 = r.y1 = p.y;
}
while (i < path->len)
{
switch (path->items[i++].k)
{
case FZ_CURVETO:
p.x = path->items[i++].v;
p.y = path->items[i++].v;
r = bound_expand(r, fz_transform_point(ctm, p));
p.x = path->items[i++].v;
p.y = path->items[i++].v;
r = bound_expand(r, fz_transform_point(ctm, p));
p.x = path->items[i++].v;
p.y = path->items[i++].v;
r = bound_expand(r, fz_transform_point(ctm, p));
break;
case FZ_MOVETO:
case FZ_LINETO:
p.x = path->items[i++].v;
p.y = path->items[i++].v;
r = bound_expand(r, fz_transform_point(ctm, p));
break;
case FZ_CLOSE_PATH:
break;
}
}
if (stroke)
{
float miterlength = stroke->miterlimit;
float linewidth = stroke->linewidth;
float expand = MAX(miterlength, linewidth) * 0.5f;
r.x0 -= expand;
r.y0 -= expand;
r.x1 += expand;
r.y1 += expand;
}
return r;
}
fz_rect *
fz_bound_path(fz_context *ctx, fz_path *path, const fz_stroke_state *stroke, const fz_matrix *ctm, fz_rect *r)
{
fz_point p;
int i = 0, k = 0;
/* If the path is empty, return the empty rectangle here - don't wait
* for it to be expanded in the stroked case below.
* A path must start with a moveto - and if that's all there is
* then the path is empty. */
if (path->cmd_len == 0 || path->cmd_len == 1)
{
*r = fz_empty_rect;
return r;
}
/* Initial moveto point */
p.x = path->coords[0];
p.y = path->coords[1];
fz_transform_point(&p, ctm);
r->x0 = r->x1 = p.x;
r->y0 = r->y1 = p.y;
while (i < path->cmd_len)
{
switch (path->cmds[i++])
{
case FZ_CURVETO:
p.x = path->coords[k++];
p.y = path->coords[k++];
bound_expand(r, fz_transform_point(&p, ctm));
p.x = path->coords[k++];
p.y = path->coords[k++];
bound_expand(r, fz_transform_point(&p, ctm));
p.x = path->coords[k++];
p.y = path->coords[k++];
bound_expand(r, fz_transform_point(&p, ctm));
break;
case FZ_MOVETO:
if (k + 2 == path->coord_len)
{
/* Trailing Moveto - cannot affect bbox */
k += 2;
break;
}
/* fallthrough */
case FZ_LINETO:
p.x = path->coords[k++];
p.y = path->coords[k++];
bound_expand(r, fz_transform_point(&p, ctm));
break;
case FZ_CLOSE_PATH:
break;
}
}
if (stroke)
{
fz_adjust_rect_for_stroke(r, stroke, ctm);
}
return r;
}
