fz_rect *
fz_bound_text(fz_context *ctx, const fz_text *text, const fz_stroke_state *stroke, const fz_matrix *ctm, fz_rect *bbox)
{
fz_text_span *span;
fz_matrix tm, trm;
fz_rect gbox;
int i;
*bbox = fz_empty_rect;
for (span = text->head; span; span = span->next)
{
if (span->len > 0)
{
tm = span->trm;
for (i = 0; i < span->len; i++)
{
if (span->items[i].gid >= 0)
{
tm.e = span->items[i].x;
tm.f = span->items[i].y;
fz_concat(&trm, &tm, ctm);
fz_bound_glyph(ctx, span->font, span->items[i].gid, &trm, &gbox);
fz_union_rect(bbox, &gbox);
}
}
}
}
if (!fz_is_empty_rect(bbox))
{
if (stroke)
fz_adjust_rect_for_stroke(ctx, bbox, stroke, ctm);
/* Compensate for the glyph cache limited positioning precision */
bbox->x0 -= 1;
bbox->y0 -= 1;
bbox->x1 += 1;
bbox->y1 += 1;
}
return bbox;
}
static void
fz_list_clip_stroke_text(fz_device *dev, fz_text *text, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_display_node *node;
fz_context *ctx = dev->ctx;
node = fz_new_display_node(ctx, FZ_CMD_CLIP_STROKE_TEXT, ctm, NULL, NULL, 0);
fz_try(ctx)
{
node->rect = fz_bound_text(dev->ctx, text, ctm);
fz_adjust_rect_for_stroke(&node->rect, stroke, &ctm);
node->item.text = fz_clone_text(dev->ctx, text);
node->stroke = fz_keep_stroke_state(dev->ctx, stroke);
}
fz_catch(ctx)
{
fz_free_display_node(ctx, node);
fz_rethrow(ctx);
}
fz_append_display_node(dev->user, node);
}
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;
}
