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text rendering: only create objects once rather than per geometry part/placement attempt - refs #162

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This commit is contained in:
Dane Springmeyer 2011-12-22 14:48:40 -08:00
parent 654f579ac9
commit eaf8d50422
1 changed files with 70 additions and 53 deletions
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123
src/agg/process_text_symbolizer.cpp
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@ -42,7 +42,11 @@ void agg_renderer<T>::process(text_symbolizer const& sym,
{
geometry_type const& geom = feature.get_geometry(i);
if (geom.num_points() == 0) continue; // don't bother with empty geometries
if (geom.num_points() == 0)
{
// don't bother with empty geometries
continue;
}
if ((geom.type() == Polygon) && sym.get_minimum_path_length() > 0)
{
@ -54,70 +58,82 @@ void agg_renderer<T>::process(text_symbolizer const& sym,
}
}
// TODO - calculate length here as well
// TODO - sort on size to priorize labeling larger geom
// https://github.com/mapnik/mapnik/issues/162
geometries_to_process.push_back(const_cast<geometry_type*>(&geom));
}
if (!geometries_to_process.size() > 0)
{
return; // early return to avoid significant overhead of rendering setup
}
expression_ptr name_expr = sym.get_name();
if (!name_expr)
{
return;
}
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr);
UnicodeString text = result.to_unicode();
if (text.length() <= 0)
{
// if text is empty no reason to continue
return;
}
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);
}
color const& fill = sym.get_fill();
face_set_ptr faces;
if (sym.get_fontset().size() > 0)
{
faces = font_manager_.get_face_set(sym.get_fontset());
}
else
{
faces = font_manager_.get_face_set(sym.get_face_name());
}
stroker_ptr strk = font_manager_.get_stroker();
if (!(faces->size() > 0 && strk))
{
throw config_error("Unable to find specified font face '" + sym.get_face_name() + "'");
}
typedef coord_transform2<CoordTransform,geometry_type> path_type;
metawriter_with_properties writer = sym.get_metawriter();
text_renderer<T> ren(pixmap_, faces, *strk);
ren.set_fill(fill);
ren.set_halo_fill(sym.get_halo_fill());
ren.set_halo_radius(sym.get_halo_radius() * scale_factor_);
ren.set_opacity(sym.get_text_opacity());
box2d<double> dims(0,0,width_,height_);
placement_finder<label_collision_detector4> finder(*detector_,dims);
string_info info(text);
faces->get_string_info(info);
bool placement_found = false;
text_placement_info_ptr placement_options = sym.get_placement_options()->get_placement_info();
while (!placement_found && placement_options->next())
{
expression_ptr name_expr = sym.get_name();
if (!name_expr) return;
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr);
UnicodeString 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);
}
if ( text.length() <= 0 ) continue;
color const& fill = sym.get_fill();
face_set_ptr faces;
if (sym.get_fontset().size() > 0)
{
faces = font_manager_.get_face_set(sym.get_fontset());
}
else
{
faces = font_manager_.get_face_set(sym.get_face_name());
}
stroker_ptr strk = font_manager_.get_stroker();
if (!(faces->size() > 0 && strk))
{
throw config_error("Unable to find specified font face '" + sym.get_face_name() + "'");
}
text_renderer<T> ren(pixmap_, faces, *strk);
ren.set_character_size(placement_options->text_size * scale_factor_);
ren.set_fill(fill);
ren.set_halo_fill(sym.get_halo_fill());
ren.set_halo_radius(sym.get_halo_radius() * scale_factor_);
ren.set_opacity(sym.get_text_opacity());
box2d<double> dims(0,0,width_,height_);
placement_finder<label_collision_detector4> finder(*detector_,dims);
string_info info(text);
faces->get_string_info(info);
metawriter_with_properties writer = sym.get_metawriter();
BOOST_FOREACH( geometry_type * geom, geometries_to_process )
{
@ -146,7 +162,8 @@ void agg_renderer<T>::process(text_symbolizer const& sym,
if (angle_expr)
{
// apply rotation
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*angle_expr);
value_type result = boost::apply_visitor(
evaluate<Feature,value_type>(feature),*angle_expr);
angle = result.to_double();
}