void renderLabels(cairo_t* cr, std::vector<std::pair<string, FloatPoint> >& toPlace) {
cairo_save(cr);
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.5);
cairo_font_face_t* font = cairo_toy_font_face_create(DEFAULT_FONT, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_face(cr, font);
cairo_set_font_size(cr, 120.0);
cairo_set_line_width(cr, 2.0);
cairo_text_extents_t textSize;
std::list<shared_ptr<Label> > labels;
int i = 0;
std::vector<shared_ptr<Style>> styles;
for (auto& pair : toPlace)
{
string& text = pair.first;
cairo_text_extents(cr, text.c_str(), &textSize);
shared_ptr<Style> s = boost::make_shared<Style>();
s->text = text;
styles.push_back(s);
FloatPoint center = pair.second + FloatPoint(textSize.width/2.0, textSize.height/2.0);
FloatRect owner = FloatRect(center.x, center.y, center.x, center.y);
FloatPoint origin = pair.second - FloatPoint(textSize.x_bearing, textSize.y_bearing);
shared_ptr<Label> l = boost::make_shared<Label>(FloatRect(pair.second, textSize.width, textSize.height), owner, s->text, s.get(), origin);
cairo_rectangle(cr, l->box.minX, l->box.minY, l->box.getWidth(), l->box.getHeight());
cairo_stroke(cr);
labels.push_back(l);
}
std::vector<shared_ptr<Label> > placed;
placeLabels(labels, placed);
for (auto& l: placed)
{
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
cairo_move_to(cr, l->box.minX, l->box.maxY);
cairo_show_text(cr, l->style->text.str().c_str());
cairo_fill(cr);
cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.5);
cairo_rectangle(cr, l->box.minX, l->box.minY, l->box.getWidth(), l->box.getHeight());
cairo_fill(cr);
}
cairo_restore(cr);
}
void renderLabels(Cairo::RefPtr<Cairo::Context> cr, std::vector<std::pair<string, FloatPoint> >& toPlace) {
cr->save();
cr->set_source_rgba(0.0, 0.0, 0.0, 0.5);
Cairo::RefPtr<Cairo::ToyFontFace> font = Cairo::ToyFontFace::create(DEFAULT_FONT, Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_NORMAL);
cr->set_font_face(font);
cr->set_font_size(120.0);
cr->set_line_width(2.0);
Cairo::TextExtents textSize;
std::list<shared_ptr<Label> > labels;
int i = 0;
std::vector<shared_ptr<Style>> styles;
for (auto& pair : toPlace)
{
string& text = pair.first;
cr->get_text_extents(text, textSize);
shared_ptr<Style> s = boost::make_shared<Style>();
s->text = text;
styles.push_back(s);
FloatPoint center = pair.second + FloatPoint(textSize.width/2.0, textSize.height/2.0);
FloatRect owner = FloatRect(center.x, center.y, center.x, center.y);
FloatPoint origin = pair.second - FloatPoint(textSize.x_bearing, textSize.y_bearing);
shared_ptr<Label> l = boost::make_shared<Label>(FloatRect(pair.second, textSize.width, textSize.height), owner, s->text, s.get(), origin);
cr->rectangle(l->box.minX, l->box.minY, l->box.getWidth(), l->box.getHeight());
cr->stroke();
labels.push_back(l);
}
std::vector<shared_ptr<Label> > placed;
placeLabels(labels, placed);
for (auto& l: placed)
{
cr->set_source_rgba(0.0, 0.0, 0.0, 1.0);
cr->move_to(l->box.minX, l->box.maxY);
cr->show_text(l->style->text.str());
cr->fill();
cr->set_source_rgba(1.0, 0.0, 0.0, 0.5);
cr->rectangle(l->box.minX, l->box.minY, l->box.getWidth(), l->box.getHeight());
cr->fill();
}
cr->restore();
}
void Renderer::renderArea(const FixedRect& area,
CairoLayer layers[],
double width, double height,
RenderAttributes& map,
AssetCache& cache)
{
// sort objects into acroding to z-index
std::vector<NodeId> nodes;
std::vector<WayId> ways;
std::vector<RelId> relations;
sortObjects(map, nodes, ways, relations);
// transform Mercator to tile coordinates
Cairo::Matrix trans = Cairo::scaling_matrix(width / (double) area.getWidth(),
height / (double) area.getHeight());
trans.translate(-area.minX, -area.minY);
std::list<shared_ptr<Label> > labels;
std::list<shared_ptr<Shield> > shields;
// render objects and collect label positions
renderObjects(layers, map, trans, nodes, ways, relations, labels, shields, cache);
// sort, place and render shields
std::vector<shared_ptr<Shield> > placedShields;
placedShields.reserve(10);
shields.sort(&CompareLabels<Shield>);
placeShields(shields, placedShields);
renderShields(layers[LAYER_LABELS].cr, placedShields);
renderLabels<Shield>(layers[LAYER_LABELS].cr, placedShields, cache);
// sort, place and render labels
std::vector<shared_ptr<Label> > placedLabels;
placedLabels.reserve(labels.size());
labels.sort(&CompareLabels<Label>);
placeLabels(labels, placedLabels);
renderLabels<Label>(layers[LAYER_LABELS].cr, placedLabels, cache);
compositeLayers(layers);
}
static void addXLabels(Agraph_t * gp)
{
Agnode_t *np;
Agedge_t *ep;
int cnt, i, n_objs, n_lbls;
int n_nlbls = 0; /* # of unset node xlabels */
int n_elbls = 0; /* # of unset edge labels or xlabels */
int n_set_lbls = 0; /* # of set xlabels and edge labels */
int n_clbls = 0; /* # of set cluster labels */
boxf bb;
pointf ur;
textlabel_t* lp;
label_params_t params;
object_t* objs;
xlabel_t* lbls;
object_t* objp;
xlabel_t* xlp;
Agsym_t* force;
int et = EDGE_TYPE(gp);
if (!(GD_has_labels(gp) & NODE_XLABEL) &&
!(GD_has_labels(gp) & EDGE_XLABEL) &&
!(GD_has_labels(gp) & TAIL_LABEL) &&
!(GD_has_labels(gp) & HEAD_LABEL) &&
(!(GD_has_labels(gp) & EDGE_LABEL) || EdgeLabelsDone))
return;
for (np = agfstnode(gp); np; np = agnxtnode(gp, np)) {
if (ND_xlabel(np)) {
if (ND_xlabel(np)->set)
n_set_lbls++;
else
n_nlbls++;
}
for (ep = agfstout(gp, np); ep; ep = agnxtout(gp, ep)) {
if (ED_xlabel(ep)) {
if (ED_xlabel(ep)->set)
n_set_lbls++;
else if (HAVE_EDGE(ep))
n_elbls++;
}
if (ED_head_label(ep)) {
if (ED_head_label(ep)->set)
n_set_lbls++;
else if (HAVE_EDGE(ep))
n_elbls++;
}
if (ED_tail_label(ep)) {
if (ED_tail_label(ep)->set)
n_set_lbls++;
else if (HAVE_EDGE(ep))
n_elbls++;
}
if (ED_label(ep)) {
if (ED_label(ep)->set)
n_set_lbls++;
else if (HAVE_EDGE(ep))
n_elbls++;
}
}
}
if (GD_has_labels(gp) & GRAPH_LABEL)
n_clbls = countClusterLabels (gp);
/* A label for each unpositioned external label */
n_lbls = n_nlbls + n_elbls;
if (n_lbls == 0) return;
/* An object for each node, each positioned external label, any cluster label,
* and all unset edge labels and xlabels.
*/
n_objs = agnnodes(gp) + n_set_lbls + n_clbls + n_elbls;
objp = objs = N_NEW(n_objs, object_t);
xlp = lbls = N_NEW(n_lbls, xlabel_t);
bb.LL = pointfof(INT_MAX, INT_MAX);
bb.UR = pointfof(-INT_MAX, -INT_MAX);
for (np = agfstnode(gp); np; np = agnxtnode(gp, np)) {
bb = addNodeObj (np, objp, bb);
if ((lp = ND_xlabel(np))) {
if (lp->set) {
objp++;
bb = addLabelObj (lp, objp, bb);
}
else {
addXLabel (lp, objp, xlp, 0, ur);
xlp++;
}
}
objp++;
for (ep = agfstout(gp, np); ep; ep = agnxtout(gp, ep)) {
if ((lp = ED_label(ep))) {
if (lp->set) {
bb = addLabelObj (lp, objp, bb);
}
else if (HAVE_EDGE(ep)) {
addXLabel (lp, objp, xlp, 1, edgeMidpoint(gp, ep));
xlp++;
}
else {
agerr(AGWARN, "no position for edge with label %s",
ED_label(ep)->text);
continue;
}
objp++;
}
if ((lp = ED_tail_label(ep))) {
if (lp->set) {
bb = addLabelObj (lp, objp, bb);
}
else if (HAVE_EDGE(ep)) {
addXLabel (lp, objp, xlp, 1, edgeTailpoint(ep));
xlp++;
}
else {
agerr(AGWARN, "no position for edge with tail label %s",
ED_tail_label(ep)->text);
continue;
}
objp++;
}
if ((lp = ED_head_label(ep))) {
if (lp->set) {
bb = addLabelObj (lp, objp, bb);
}
else if (HAVE_EDGE(ep)) {
addXLabel (lp, objp, xlp, 1, edgeHeadpoint(ep));
xlp++;
}
else {
agerr(AGWARN, "no position for edge with head label %s",
ED_head_label(ep)->text);
continue;
}
objp++;
}
if ((lp = ED_xlabel(ep))) {
if (lp->set) {
bb = addLabelObj (lp, objp, bb);
}
else if (HAVE_EDGE(ep)) {
addXLabel (lp, objp, xlp, 1, edgeMidpoint(gp, ep));
xlp++;
}
else {
agerr(AGWARN, "no position for edge with xlabel %s",
ED_xlabel(ep)->text);
continue;
}
objp++;
}
}
}
if (n_clbls) {
cinfo_t info;
info.bb = bb;
info.objp = objp;
info = addClusterObj (gp, info);
bb = info.bb;
}
force = agfindgraphattr(gp, "forcelabels");
params.force = late_bool(gp, force, TRUE);
params.bb = bb;
placeLabels(objs, n_objs, lbls, n_lbls, ¶ms);
if (Verbose)
printData(objs, n_objs, lbls, n_lbls, ¶ms);
xlp = lbls;
cnt = 0;
for (i = 0; i < n_lbls; i++) {
if (xlp->set) {
cnt++;
lp = (textlabel_t *) (xlp->lbl);
lp->set = 1;
lp->pos = centerPt(xlp);
updateBB (gp, lp);
}
xlp++;
}
if (Verbose)
fprintf (stderr, "%d out of %d labels positioned.\n", cnt, n_lbls);
else if (cnt != n_lbls)
agerr(AGWARN, "%d out of %d exterior labels positioned.\n", cnt, n_lbls);
free(objs);
free(lbls);
}
