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ShieldSymbolizer for Cairo.

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This commit is contained in:
Hermann Kraus 2012-01-29 05:03:38 +01:00
parent 3e59503e25
commit 4a3a3fd82c
1 changed files with 15 additions and 196 deletions
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211
src/cairo_renderer.cpp
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@ -1051,207 +1051,26 @@ void cairo_renderer_base::process(shield_symbolizer const& sym,
Feature const& feature,
proj_transform const& prj_trans)
{
#if 0
typedef coord_transform2<CoordTransform,geometry_type> path_type;
shield_symbolizer_helper<face_manager<freetype_engine>,
label_collision_detector4> helper(
sym, feature, prj_trans,
detector_.extent().width(), detector_.extent().height(),
1.0 /*scale_factor*/,
t_, font_manager_, detector_);
text_placement_info_ptr placement_options = sym.get_placement_options()->get_placement_info();
placement_options->next();
cairo_context context(context_);
UnicodeString text;
if( sym.get_no_text() )
text = UnicodeString( " " ); // TODO: fix->use 'space' as the text to render
else
{
expression_ptr name_expr = sym.get_name();
if (!name_expr) return;
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr);
text = result.to_unicode();
}
if ( sym.get_text_transform() == UPPERCASE)
{
text = text.toUpper();
}
else if ( sym.get_text_transform() == LOWERCASE)
{
text = text.toLower();
}
else if ( sym.get_text_transform() == CAPITALIZE)
{
text = text.toTitle(NULL);
}
agg::trans_affine tr;
boost::array<double,6> const& m = sym.get_transform();
tr.load_from(&m[0]);
std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
boost::optional<marker_ptr> marker;
if ( !filename.empty() )
{
marker = marker_cache::instance()->find(filename, true);
}
else
{
marker.reset(boost::make_shared<mapnik::marker>());
}
if (text.length() > 0 && marker)
{
face_set_ptr faces;
if (sym.get_fontset().size() > 0)
text_placement_info_ptr placement;
while ((placement = helper.get_placement())) {
for (unsigned int ii = 0; ii < placement->placements.size(); ++ii)
{
faces = font_manager_.get_face_set(sym.get_fontset());
}
else
{
faces = font_manager_.get_face_set(sym.get_face_name());
}
if (faces->size() > 0)
{
cairo_context context(context_);
string_info info(text);
placement_finder<label_collision_detector4> finder(detector_);
faces->set_character_sizes(placement_options->text_size);
faces->get_string_info(info, text, 0);
int w = (*marker)->width();
int h = (*marker)->height();
metawriter_with_properties writer = sym.get_metawriter();
for (unsigned i = 0; i < feature.num_geometries(); ++i)
{
geometry_type const& geom = feature.get_geometry(i);
if (geom.num_points() > 0) // don't bother with empty geometries
{
path_type path(t_, geom, prj_trans);
label_placement_enum how_placed = sym.get_label_placement();
if (how_placed == POINT_PLACEMENT || how_placed == VERTEX_PLACEMENT || how_placed == INTERIOR_PLACEMENT)
{
// for every vertex, try and place a shield/text
geom.rewind(0);
placement text_placement(info, sym, 1.0, w, h, false);
text_placement.avoid_edges = sym.get_avoid_edges();
text_placement.allow_overlap = sym.get_allow_overlap();
if (writer.first)
text_placement.collect_extents = true; // needed for inmem metawriter
position const& pos = sym.get_displacement();
position const& shield_pos = sym.get_shield_displacement();
for( unsigned jj = 0; jj < geom.num_points(); jj++ )
{
double label_x;
double label_y;
double z=0.0;
if( how_placed == VERTEX_PLACEMENT )
geom.vertex(&label_x,&label_y); // by vertex
else if( how_placed == INTERIOR_PLACEMENT )
geom.label_interior_position(&label_x,&label_y);
else
geom.label_position(&label_x, &label_y); // by middle of line or by point
prj_trans.backward(label_x,label_y, z);
t_.forward(&label_x,&label_y);
label_x += boost::get<0>(shield_pos);
label_y += boost::get<1>(shield_pos);
finder.find_point_placement(text_placement, placement_options,
label_x, label_y, 0.0,
sym.get_line_spacing(),
sym.get_character_spacing());
for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ ii)
{
double x = text_placement.placements[ii].starting_x;
double y = text_placement.placements[ii].starting_y;
int px;
int py;
box2d<double> label_ext;
if( !sym.get_unlock_image() )
{
// center image at text center position
// remove displacement from image label
double lx = x - boost::get<0>(pos);
double ly = y - boost::get<1>(pos);
px=int(floor(lx - (0.5 * w)));
py=int(floor(ly - (0.5 * h)));
label_ext.init( floor(lx - 0.5 * w), floor(ly - 0.5 * h), ceil (lx + 0.5 * w), ceil (ly + 0.5 * h) );
}
else
{ // center image at reference location
px=int(floor(label_x - 0.5 * w));
py=int(floor(label_y - 0.5 * h));
label_ext.init( floor(label_x - 0.5 * w), floor(label_y - 0.5 * h), ceil (label_x + 0.5 * w), ceil (label_y + 0.5 * h));
}
if ( sym.get_allow_overlap() || detector_.has_placement(label_ext) )
{
render_marker(px,py,**marker, tr, sym.get_opacity());
context.add_text(text_placement.placements[ii],
face_manager_,
faces,
placement_options->text_size,
sym.get_fill(),
sym.get_halo_radius(),
sym.get_halo_fill()
);
if (writer.first) {
writer.first->add_box(box2d<double>(px,py,px+w,py+h), feature, t_, writer.second);
writer.first->add_text(text_placement, faces, feature, t_, writer.second); //Only 1 placement
}
detector_.insert(label_ext);
}
}
finder.update_detector(text_placement);
}
}
else if (geom.num_points() > 1 && how_placed == LINE_PLACEMENT)
{
placement text_placement(info, sym, 1.0, w, h, true);
text_placement.avoid_edges = sym.get_avoid_edges();
finder.find_point_placements<path_type>(text_placement, placement_options, path);
position const& pos = sym.get_displacement();
for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ ii)
{
double x = text_placement.placements[ii].starting_x;
double y = text_placement.placements[ii].starting_y;
double lx = x - boost::get<0>(pos);
double ly = y - boost::get<1>(pos);
int px=int(floor(lx - (0.5*w)));
int py=int(floor(ly - (0.5*h)));
render_marker(px,py,**marker, tr, sym.get_opacity());
context.add_text(text_placement.placements[ii],
face_manager_,
faces,
placement_options->text_size,
sym.get_fill(),
sym.get_halo_radius(),
sym.get_halo_fill()
);
if (writer.first) writer.first->add_box(box2d<double>(px,py,px+w,py+h), feature, t_, writer.second);
}
finder.update_detector(text_placement);
if (writer.first) writer.first->add_text(text_placement, faces, feature, t_, writer.second); //More than one placement
}
}
}
std::pair<int, int> marker_pos = helper.get_marker_position(placement->placements[ii]);
render_marker(marker_pos.first, marker_pos.second,
helper.get_marker(), helper.get_transform(),
sym.get_opacity());
context.add_text(placement->placements[ii], face_manager_, font_manager_);
}
}
#endif
}
void cairo_renderer_base::process(line_pattern_symbolizer const& sym,