mapnik::raster_ptr pgraster_wkb_reader::read_rgba(mapnik::box2d<double> const& bbox,
uint16_t width, uint16_t height)
{
mapnik::image_rgba8 im(width, height, true, true);
// Start with plain white (ABGR or RGBA depending on endiannes)
im.set(0xffffffff);
uint8_t nodataval;
for (int bn=0; bn<numBands_; ++bn) {
uint8_t type = read_uint8(&ptr_);
int pixtype = BANDTYPE_PIXTYPE(type);
int offline = BANDTYPE_IS_OFFDB(type) ? 1 : 0;
int hasnodata = BANDTYPE_HAS_NODATA(type) ? 1 : 0;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: band " << bn
<< " type:" << pixtype << " offline:" << offline
<< " hasnodata:" << hasnodata;
if ( offline ) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: offline band "
<< bn << " unsupported";
continue;
}
if ( pixtype > PT_8BUI || pixtype < PT_8BSI ) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: band " << bn
<< " type " << type << " unsupported";
continue;
}
uint8_t tmp = read_uint8(&ptr_);
if ( ! bn ) nodataval = tmp;
else if ( tmp != nodataval ) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: band " << bn
<< " nodataval " << tmp << " != band 0 nodataval " << nodataval;
}
int ps = 4; // sizeof(image::pixel_type)
uint8_t * image_data = im.bytes();
for (int y=0; y<height_; ++y) {
for (int x=0; x<width_; ++x) {
uint8_t val = read_uint8(&ptr_);
// y * width_ * ps is the row (ps is pixel size)
// x * ps is the column
int off = y * width_ * ps + x * ps;
// Pixel space is RGBA
image_data[off+bn] = val;
}
}
}
mapnik::raster_ptr raster = std::make_shared<mapnik::raster>(bbox, im, 1.0);
raster->set_nodata(0xffffffff);
return raster;
}
bool placement_finder::next_position()
{
if (info_.next())
{
// parent layout, has top-level ownership of a new evaluated_format_properties_ptr (TODO is this good enough to stay in scope???)
// but does not take ownership of the text_symbolizer_properties (info_.properties)
text_layout_ptr layout = std::make_shared<text_layout>(font_manager_,
feature_,
attr_,
scale_factor_,
info_.properties,
info_.properties.layout_defaults,
info_.properties.format_tree());
// TODO: why is this call needed?
// https://github.com/mapnik/mapnik/issues/2525
text_props_ = evaluate_text_properties(info_.properties,feature_,attr_);
// Note: this clear call is needed when multiple placements are tried
// like with placement-type="simple|list"
if (!layouts_.empty()) layouts_.clear();
// Note: multiple layouts_ may result from this add() call
layouts_.add(layout);
layouts_.layout();
// cache a few values for use elsewhere in placement finder
move_dx_ = layout->displacement().x;
horizontal_alignment_ = layout->horizontal_alignment();
return true;
}
MAPNIK_LOG_WARN(placement_finder) << "next_position() called while last call already returned false!\n";
return false;
}
font_library::font_library()
: library_(nullptr),
memory_(new FT_MemoryRec_)
{
memory_->alloc = _Alloc_Func;
memory_->free = _Free_Func;
memory_->realloc = _Realloc_Func;
FT_Error error = FT_New_Library(&*memory_, &library_);
if (error) throw std::runtime_error("can not initialize FreeType2 library");
FT_Add_Default_Modules(library_);
#if ((FREETYPE_MAJOR*1000 + FREETYPE_MINOR)*1000 >= 2008000)
FT_Set_Default_Properties(library_);
#endif
if (!std::getenv("FREETYPE_PROPERTIES") && version() >= compact_version(2, 7, 0))
{
FT_UInt interpreter_version = 35;
error = FT_Property_Set(library_, "truetype",
"interpreter-version", &interpreter_version );
if (error)
{
MAPNIK_LOG_WARN(font_library) << "FreeType: Error setting interpreter-version=35";
}
}
}
void apply_markers_multi(feature_impl const& feature, attributes const& vars, Converter & converter, markers_symbolizer const& sym)
{
std::size_t geom_count = feature.paths().size();
if (geom_count == 1)
{
converter.apply(feature.paths()[0]);
}
else if (geom_count > 1)
{
marker_multi_policy_enum multi_policy = get<marker_multi_policy_enum>(sym, keys::markers_multipolicy, feature, vars, MARKER_EACH_MULTI);
marker_placement_enum placement = get<marker_placement_enum>(sym, keys::markers_placement_type, feature, vars, MARKER_POINT_PLACEMENT);
if (placement == MARKER_POINT_PLACEMENT &&
multi_policy == MARKER_WHOLE_MULTI)
{
double x, y;
if (label::centroid_geoms(feature.paths().begin(), feature.paths().end(), x, y))
{
geometry_type pt(geometry_type::types::Point);
pt.move_to(x, y);
// unset any clipping since we're now dealing with a point
converter.template unset<clip_poly_tag>();
converter.apply(pt);
}
}
else if ((placement == MARKER_POINT_PLACEMENT || placement == MARKER_INTERIOR_PLACEMENT) &&
multi_policy == MARKER_LARGEST_MULTI)
{
// Only apply to path with largest envelope area
// TODO: consider using true area for polygon types
double maxarea = 0;
geometry_type const* largest = 0;
for (geometry_type const& geom : feature.paths())
{
const box2d<double>& env = geom.envelope();
double area = env.width() * env.height();
if (area > maxarea)
{
maxarea = area;
largest = &geom;
}
}
if (largest)
{
converter.apply(*largest);
}
}
else
{
if (multi_policy != MARKER_EACH_MULTI && placement != MARKER_POINT_PLACEMENT)
{
MAPNIK_LOG_WARN(marker_symbolizer) << "marker_multi_policy != 'each' has no effect with marker_placement != 'point'";
}
for (geometry_type const& path : feature.paths())
{
converter.apply(path);
}
}
}
}
/** Set spacing_left_, adjusts error_ and performs sanity checks. */
void set_spacing_left(double sl, bool allow_negative=false)
{
double delta_error = sl - spacing_left_;
if (!allow_negative && delta_error < 0)
{
MAPNIK_LOG_WARN(markers_placement) << "Unexpected negative error in markers_placement. Please file a bug report.";
return;
}
#ifdef MAPNIK_DEBUG
if (delta_error == 0.0)
{
MAPNIK_LOG_WARN(markers_placement) << "Not moving at all in set_spacing_left()! Please file a bug report.";
}
#endif
error_ += delta_error;
spacing_left_ = sl;
}
inline void write_feature_header(std::string type) {
if (count_ == STOPPED)
{
MAPNIK_LOG_WARN(metawrite_json) << "Metawriter: instance not started before using it.";
}
if (count_ == HEADER_NOT_WRITTEN) write_header();
if (count_++) *f_ << ",\n";
*f_ << "{ \"type\": \"Feature\",\n \"geometry\": { \"type\": \"" << type << "\",\n \"coordinates\":";
}
mapnik::raster_ptr pgraster_wkb_reader::read_grayscale(mapnik::box2d<double> const& bbox,
uint16_t width, uint16_t height)
{
uint8_t type = read_uint8(&ptr_);
int pixtype = BANDTYPE_PIXTYPE(type);
int offline = BANDTYPE_IS_OFFDB(type) ? 1 : 0;
int hasnodata = BANDTYPE_HAS_NODATA(type) ? 1 : 0;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: band type:"
<< pixtype << " offline:" << offline
<< " hasnodata:" << hasnodata;
if ( offline ) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: offline band "
" unsupported";
return mapnik::raster_ptr();
}
switch (pixtype) {
case PT_1BB:
case PT_2BUI:
case PT_4BUI:
// all <8BPP values are wrote in full bytes anyway
case PT_8BSI:
// mapnik does not support signed anyway
case PT_8BUI:
return read_grayscale_band(bbox, width_, height_, hasnodata,
std::bind(read_uint8, &ptr_));
break;
case PT_16BSI:
// mapnik does not support signed anyway
case PT_16BUI:
return read_grayscale_band(bbox, width_, height_, hasnodata,
std::bind(read_uint16, &ptr_, endian_));
break;
case PT_32BSI:
// mapnik does not support signed anyway
case PT_32BUI:
return read_grayscale_band(bbox, width_, height_, hasnodata,
std::bind(read_uint32, &ptr_, endian_));
break;
default:
std::ostringstream err;
err << "pgraster_wkb_reader: grayscale band type "
<< pixtype << " unsupported";
//MAPNIK_LOG_WARN(pgraster) << err.str();
throw mapnik::datasource_exception(err.str());
}
return mapnik::raster_ptr();
}
bool placement_finder::next_position()
{
if (info_.next())
{
text_layout_ptr layout = std::make_shared<text_layout>(font_manager_, scale_factor_, info_.properties.layout_defaults);
layout->evaluate_properties(feature_, attr_);
move_dx_ = layout->displacement().x;
info_.properties.process(*layout, feature_, attr_);
layouts_.clear(); // FIXME !!!!
layouts_.add(layout);
layouts_.layout();
horizontal_alignment_ = layout->horizontal_alignment();
return true;
}
MAPNIK_LOG_WARN(placement_finder) << "next_position() called while last call already returned false!\n";
return false;
}
mapnik::geometry::geometry<double> ogr_converter::convert_geometry(OGRGeometry* ogr_geom)
{
// NOTE: wkbFlatten macro in ogr flattens 2.5d types into base 2d type
switch (wkbFlatten(ogr_geom->getGeometryType()))
{
case wkbPoint:
return convert_point(static_cast<OGRPoint*>(ogr_geom));
break;
case wkbMultiPoint:
return convert_multipoint(static_cast<OGRMultiPoint*>(ogr_geom));
break;
case wkbLinearRing:
return convert_linestring(static_cast<OGRLinearRing*>(ogr_geom));
break;
case wkbLineString:
return convert_linestring(static_cast<OGRLineString*>(ogr_geom));
break;
case wkbMultiLineString:
return convert_multilinestring(static_cast<OGRMultiLineString*>(ogr_geom));
break;
case wkbPolygon:
return convert_polygon(static_cast<OGRPolygon*>(ogr_geom));
break;
case wkbMultiPolygon:
return convert_multipolygon(static_cast<OGRMultiPolygon*>(ogr_geom));
break;
case wkbGeometryCollection:
return convert_collection(static_cast<OGRGeometryCollection*>(ogr_geom));
break;
case wkbNone:
case wkbUnknown:
default:
{
MAPNIK_LOG_WARN(ogr) << "ogr_converter: unknown <ogr> geometry_type="
<< wkbFlatten(ogr_geom->getGeometryType());
}
return mapnik::geometry::geometry<double>();
break;
}
}
bool placement_finder::next_position()
{
if (info_.next())
{
text_layout_ptr layout = std::make_shared<text_layout>(font_manager_, scale_factor_, info_.properties.layout_defaults);
layout->evaluate_properties(feature_, attr_);
move_dx_ = layout->displacement().x;
// TODO: this call is needed (text-bug1533) ??
// https://github.com/mapnik/mapnik/issues/2525
text_props_ = evaluate_text_properties(info_.properties,feature_,attr_);
info_.properties.process(*layout, feature_, attr_);
// Note: this clear call is needed when multiple placements are tried
// like with placement-type="simple|list"
if (!layouts_.empty()) layouts_.clear();
// Note: multiple layouts_ may result from this add() call
layouts_.add(layout);
layouts_.layout();
horizontal_alignment_ = layout->horizontal_alignment();
return true;
}
MAPNIK_LOG_WARN(placement_finder) << "next_position() called while last call already returned false!\n";
return false;
}
void apply_markers_multi(feature_impl const& feature, attributes const& vars, Converter & converter, symbolizer_base const& sym)
{
using vertex_converter_type = Converter;
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
auto const& geom = feature.get_geometry();
geometry::geometry_types type = geometry::geometry_type(geom);
if (type == geometry::geometry_types::Point
|| type == geometry::geometry_types::LineString
|| type == geometry::geometry_types::Polygon)
{
apply_vertex_converter_type apply(converter);
mapnik::util::apply_visitor(vertex_processor_type(apply), geom);
}
else
{
marker_multi_policy_enum multi_policy = get<marker_multi_policy_enum, keys::markers_multipolicy>(sym, feature, vars);
marker_placement_enum placement = get<marker_placement_enum, keys::markers_placement_type>(sym, feature, vars);
if (placement == MARKER_POINT_PLACEMENT &&
multi_policy == MARKER_WHOLE_MULTI)
{
geometry::point<double> pt;
// test if centroid is contained by bounding box
if (geometry::centroid(geom, pt) && converter.disp_.args_.bbox.contains(pt.x, pt.y))
{
// unset any clipping since we're now dealing with a point
converter.template unset<clip_poly_tag>();
geometry::point_vertex_adapter<double> va(pt);
converter.apply(va);
}
}
else if ((placement == MARKER_POINT_PLACEMENT || placement == MARKER_INTERIOR_PLACEMENT) &&
multi_policy == MARKER_LARGEST_MULTI)
{
// Only apply to path with largest envelope area
// TODO: consider using true area for polygon types
if (type == geometry::geometry_types::MultiPolygon)
{
geometry::multi_polygon<double> const& multi_poly = mapnik::util::get<geometry::multi_polygon<double> >(geom);
double maxarea = 0;
geometry::polygon<double> const* largest = 0;
for (geometry::polygon<double> const& poly : multi_poly)
{
box2d<double> bbox = geometry::envelope(poly);
geometry::polygon_vertex_adapter<double> va(poly);
double area = bbox.width() * bbox.height();
if (area > maxarea)
{
maxarea = area;
largest = &poly;
}
}
if (largest)
{
geometry::polygon_vertex_adapter<double> va(*largest);
converter.apply(va);
}
}
else
{
MAPNIK_LOG_WARN(marker_symbolizer) << "TODO: if you get here -> open an issue";
}
}
else
{
if (multi_policy != MARKER_EACH_MULTI && placement != MARKER_POINT_PLACEMENT)
{
MAPNIK_LOG_WARN(marker_symbolizer) << "marker_multi_policy != 'each' has no effect with marker_placement != 'point'";
}
apply_vertex_converter_type apply(converter);
mapnik::util::apply_visitor(vertex_processor_type(apply), geom);
}
}
}
mapnik::raster_ptr
pgraster_wkb_reader::get_raster() {
/* Read endianness */
endian_ = *ptr_;
ptr_ += 1;
/* Read version of protocol */
uint16_t version = read_uint16(&ptr_, endian_);
if (version != 0) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: WKB version "
<< version << " unsupported";
return mapnik::raster_ptr();
}
numBands_ = read_uint16(&ptr_, endian_);
double scaleX = read_float64(&ptr_, endian_);
double scaleY = read_float64(&ptr_, endian_);
double ipX = read_float64(&ptr_, endian_);
double ipY = read_float64(&ptr_, endian_);
double skewX = read_float64(&ptr_, endian_);
double skewY = read_float64(&ptr_, endian_);
int32_t srid = read_int32(&ptr_, endian_);
width_ = read_uint16(&ptr_, endian_);
height_ = read_uint16(&ptr_, endian_);
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: numBands=" << numBands_;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: scaleX=" << scaleX;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: scaleY=" << scaleY;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: ipX=" << ipX;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: ipY=" << ipY;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: skewX=" << skewX;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: skewY=" << skewY;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: srid=" << srid;
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: size="
<< width_ << "x" << height_;
// this is for color interpretation
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: bandno=" << bandno_;
if ( skewX || skewY ) {
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: raster rotation is not supported";
return mapnik::raster_ptr();
}
mapnik::box2d<double> ext(ipX,ipY,ipX+(width_*scaleX),ipY+(height_*scaleY));
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: Raster extent=" << ext;
if ( bandno_ )
{
if ( bandno_ != 1 )
{
MAPNIK_LOG_WARN(pgraster) << "pgraster_wkb_reader: "
"reading bands other than 1st as indexed is unsupported";
return mapnik::raster_ptr();
}
MAPNIK_LOG_DEBUG(pgraster) << "pgraster_wkb_reader: requested band " << bandno_;
return read_indexed(ext, width_, height_);
}
else
{
switch (numBands_)
{
case 1:
return read_grayscale(ext, width_, height_);
break;
case 3:
case 4:
return read_rgba(ext, width_, height_);
break;
default:
std::ostringstream err;
err << "pgraster_wkb_reader: raster with "
<< numBands_
<< " bands is not supported, specify a band number";
//MAPNIK_LOG_WARN(pgraster) << err.str();
throw mapnik::datasource_exception(err.str());
return mapnik::raster_ptr();
}
}
return mapnik::raster_ptr();
}
void text_symbolizer_properties::from_xml(xml_node const &sym, fontset_map const & fontsets)
{
optional<label_placement_e> placement_ = sym.get_opt_attr<label_placement_e>("placement");
if (placement_) label_placement = *placement_;
optional<vertical_alignment_e> valign_ = sym.get_opt_attr<vertical_alignment_e>("vertical-alignment");
if (valign_) valign = *valign_;
optional<double> text_ratio_ = sym.get_opt_attr<double>("text-ratio");
if (text_ratio_) text_ratio = *text_ratio_;
optional<double> wrap_width_ = sym.get_opt_attr<double>("wrap-width");
if (wrap_width_) wrap_width = *wrap_width_;
optional<boolean> wrap_before_ = sym.get_opt_attr<boolean>("wrap-before");
if (wrap_before_) wrap_before = *wrap_before_;
optional<double> label_position_tolerance_ = sym.get_opt_attr<double>("label-position-tolerance");
if (label_position_tolerance_) label_position_tolerance = *label_position_tolerance_;
optional<double> spacing_ = sym.get_opt_attr<double>("spacing");
if (spacing_) label_spacing = *spacing_;
else {
// https://github.com/mapnik/mapnik/issues/1427
spacing_ = sym.get_opt_attr<double>("label-spacing");
if (spacing_) label_spacing = *spacing_;
}
optional<double> minimum_distance_ = sym.get_opt_attr<double>("minimum-distance");
if (minimum_distance_) minimum_distance = *minimum_distance_;
optional<double> min_padding_ = sym.get_opt_attr<double>("minimum-padding");
if (min_padding_) minimum_padding = *min_padding_;
optional<double> min_path_length_ = sym.get_opt_attr<double>("minimum-path-length");
if (min_path_length_) minimum_path_length = *min_path_length_;
optional<boolean> avoid_edges_ = sym.get_opt_attr<boolean>("avoid-edges");
if (avoid_edges_) avoid_edges = *avoid_edges_;
optional<boolean> allow_overlap_ = sym.get_opt_attr<boolean>("allow-overlap");
if (allow_overlap_) allow_overlap = *allow_overlap_;
optional<boolean> largest_bbox_only_ = sym.get_opt_attr<boolean>("largest-bbox-only");
if (largest_bbox_only_) largest_bbox_only = *largest_bbox_only_;
optional<horizontal_alignment_e> halign_ = sym.get_opt_attr<horizontal_alignment_e>("horizontal-alignment");
if (halign_) halign = *halign_;
optional<justify_alignment_e> jalign_ = sym.get_opt_attr<justify_alignment_e>("justify-alignment");
if (jalign_) jalign = *jalign_;
optional<expression_ptr> orientation_ = sym.get_opt_attr<expression_ptr>("orientation");
if (orientation_) orientation = *orientation_;
optional<boolean> rotate_displacement_ = sym.get_opt_attr<boolean>("rotate-displacement");
if (rotate_displacement_) rotate_displacement = *rotate_displacement_;
optional<text_upright_e> upright_ = sym.get_opt_attr<text_upright_e>("upright");
if (upright_) upright = *upright_;
optional<double> dx = sym.get_opt_attr<double>("dx");
if (dx) displacement.x = *dx;
optional<double> dy = sym.get_opt_attr<double>("dy");
if (dy) displacement.y = *dy;
optional<double> max_char_angle_delta_ = sym.get_opt_attr<double>("max-char-angle-delta");
if (max_char_angle_delta_) max_char_angle_delta=(*max_char_angle_delta_)*(M_PI/180);
optional<expression_ptr> name_ = sym.get_opt_attr<expression_ptr>("name");
if (name_)
{
MAPNIK_LOG_WARN(text_placements) << "Using 'name' in TextSymbolizer/ShieldSymbolizer is deprecated!";
set_old_style_expression(*name_);
}
format->from_xml(sym, fontsets);
formatting::node_ptr n(formatting::node::from_xml(sym));
if (n) set_format_tree(n);
}
text_layout::text_layout(face_manager_freetype & font_manager,
feature_impl const& feature,
attributes const& attrs,
double scale_factor,
text_symbolizer_properties const& properties,
text_layout_properties const& layout_defaults,
formatting::node_ptr tree)
: font_manager_(font_manager),
scale_factor_(scale_factor),
itemizer_(),
width_map_(),
width_(0.0),
height_(0.0),
glyphs_count_(0),
lines_(),
layout_properties_(layout_defaults),
properties_(properties),
format_(std::make_unique<detail::evaluated_format_properties>())
{
double dx = util::apply_visitor(extract_value<value_double>(feature,attrs), layout_properties_.dx);
double dy = util::apply_visitor(extract_value<value_double>(feature,attrs), layout_properties_.dy);
displacement_ = evaluate_displacement(dx,dy, layout_properties_.dir);
std::string wrap_str = util::apply_visitor(extract_value<std::string>(feature,attrs), layout_properties_.wrap_char);
if (!wrap_str.empty()) wrap_char_ = wrap_str[0];
wrap_width_ = util::apply_visitor(extract_value<value_double>(feature,attrs), layout_properties_.wrap_width);
double angle = util::apply_visitor(extract_value<value_double>(feature,attrs), layout_properties_.orientation);
orientation_.init(angle * M_PI/ 180.0);
wrap_before_ = util::apply_visitor(extract_value<value_bool>(feature,attrs), layout_properties_.wrap_before);
repeat_wrap_char_ = util::apply_visitor(extract_value<value_bool>(feature,attrs), layout_properties_.repeat_wrap_char);
rotate_displacement_ = util::apply_visitor(extract_value<value_bool>(feature,attrs), layout_properties_.rotate_displacement);
valign_ = util::apply_visitor(extract_value<vertical_alignment_enum>(feature,attrs),layout_properties_.valign);
halign_ = util::apply_visitor(extract_value<horizontal_alignment_enum>(feature,attrs),layout_properties_.halign);
jalign_ = util::apply_visitor(extract_value<justify_alignment_enum>(feature,attrs),layout_properties_.jalign);
// Takes a feature and produces formatted text as output.
if (tree)
{
format_properties const& format_defaults = properties_.format_defaults;
format_->text_size = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.text_size);
format_->character_spacing = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.character_spacing);
format_->line_spacing = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.line_spacing);
format_->text_opacity = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.text_opacity);
format_->halo_opacity = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.halo_opacity);
format_->halo_radius = util::apply_visitor(extract_value<value_double>(feature,attrs), format_defaults.halo_radius);
format_->fill = util::apply_visitor(extract_value<color>(feature,attrs), format_defaults.fill);
format_->halo_fill = util::apply_visitor(extract_value<color>(feature,attrs), format_defaults.halo_fill);
format_->text_transform = util::apply_visitor(extract_value<text_transform_enum>(feature,attrs), format_defaults.text_transform);
format_->face_name = format_defaults.face_name;
format_->fontset = format_defaults.fontset;
format_->ff_settings = util::apply_visitor(extract_value<font_feature_settings>(feature,attrs), format_defaults.ff_settings);
// Turn off ligatures if character_spacing > 0.
if (format_->character_spacing > .0 && format_->ff_settings.count() == 0)
{
format_->ff_settings.append(font_feature_liga_off);
}
tree->apply(format_, feature, attrs, *this);
}
else
{
MAPNIK_LOG_WARN(text_properties) << "text_symbolizer_properties can't produce text: No formatting tree!";
}
}
void copy_text_ptr(T & sym) const
{
boost::ignore_unused_variable_warning(sym);
MAPNIK_LOG_WARN(rule) << "rule: deep copying TextSymbolizers is broken!";
}
void render_point_symbolizer(point_symbolizer const &sym,
mapnik::feature_impl &feature,
proj_transform const &prj_trans,
RendererType &common,
F render_marker)
{
std::string filename = get<std::string,keys::file>(sym,feature, common.vars_);
std::shared_ptr<mapnik::marker const> mark = filename.empty()
? std::make_shared<mapnik::marker const>(mapnik::marker_rgba8())
: marker_cache::instance().find(filename, true);
if (!mark->is<mapnik::marker_null>())
{
value_double opacity = get<value_double,keys::opacity>(sym, feature, common.vars_);
value_bool allow_overlap = get<value_bool, keys::allow_overlap>(sym, feature, common.vars_);
value_bool ignore_placement = get<value_bool, keys::ignore_placement>(sym, feature, common.vars_);
point_placement_enum placement= get<point_placement_enum, keys::point_placement_type>(sym, feature, common.vars_);
box2d<double> const& bbox = mark->bounding_box();
coord2d center = bbox.center();
agg::trans_affine tr;
auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
if (image_transform) evaluate_transform(tr, feature, common.vars_, *image_transform, common.scale_factor_);
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine recenter_tr = recenter * tr;
box2d<double> label_ext = bbox * recenter_tr * agg::trans_affine_scaling(common.scale_factor_);
mapnik::geometry::geometry<double> const& geometry = feature.get_geometry();
mapnik::geometry::point<double> pt;
geometry::geometry_types type = geometry::geometry_type(geometry);
if (placement == CENTROID_POINT_PLACEMENT ||
type == geometry::geometry_types::Point ||
type == geometry::geometry_types::MultiPoint)
{
if (!geometry::centroid(geometry, pt)) return;
}
else if (type == mapnik::geometry::geometry_types::Polygon)
{
auto const& poly = mapnik::util::get<geometry::polygon<double> >(geometry);
geometry::polygon_vertex_adapter<double> va(poly);
if (!label::interior_position(va ,pt.x, pt.y))
return;
}
else
{
MAPNIK_LOG_WARN(point_symbolizer) << "TODO: unhandled geometry type for point symbolizer";
return;
}
double x = pt.x;
double y = pt.y;
double z = 0;
prj_trans.backward(x,y,z);
common.t_.forward(&x,&y);
label_ext.re_center(x,y);
if (allow_overlap ||
common.detector_->has_placement(label_ext))
{
render_marker(pixel_position(x, y),
*mark,
tr,
opacity);
if (!ignore_placement)
common.detector_->insert(label_ext);
}
}
}
void grid_renderer<T>::process(raster_symbolizer const&,
mapnik::feature_impl &,
proj_transform const&)
{
MAPNIK_LOG_WARN(grid_renderer) << "grid_renderer: raster_symbolizer is not yet supported";
}
bool markers_placement<Locator, Detector>::get_point(
double & x, double & y, double & angle, bool add_to_detector)
{
if (done_) return false;
unsigned cmd;
/* This functions starts at the position of the previous marker,
walks along the path, counting how far it has to go in spacing_left.
If one marker can't be placed at the position it should go to it is
moved a bit. The error is compensated for in the next call to this
function.
error > 0: Marker too near to the end of the path.
error = 0: Perfect position.
error < 0: Marker too near to the beginning of the path.
*/
if (marker_nr_++ == 0)
{
//First marker
spacing_left_ = spacing_ / 2;
} else
{
spacing_left_ = spacing_;
}
spacing_left_ -= error_;
error_ = 0;
//Loop exits when a position is found or when no more segments are available
while (true)
{
//Do not place markers too close to the beginning of a segment
if (spacing_left_ < marker_width_/2)
{
set_spacing_left(marker_width_/2); //Only moves forward
}
//Error for this marker is too large. Skip to the next position.
if (abs(error_) > max_error_ * spacing_)
{
if (error_ > spacing_)
{
error_ = 0; //Avoid moving backwards
MAPNIK_LOG_WARN(markers_placement) << "Extremely large error in markers_placement. Please file a bug report.";
}
spacing_left_ += spacing_ - error_;
error_ = 0;
}
double dx = next_x - last_x;
double dy = next_y - last_y;
double segment_length = std::sqrt(dx * dx + dy * dy);
if (segment_length <= spacing_left_)
{
//Segment is to short to place marker. Find next segment
spacing_left_ -= segment_length;
last_x = next_x;
last_y = next_y;
while (agg::is_move_to(cmd = locator_.vertex(&next_x, &next_y)))
{
//Skip over "move" commands
last_x = next_x;
last_y = next_y;
}
if (agg::is_stop(cmd))
{
done_ = true;
return false;
}
continue; //Try again
}
/* At this point we know the following things:
- segment_length > spacing_left
- error is small enough
- at least half a marker fits into this segment
*/
//Check if marker really fits in this segment
if (segment_length < marker_width_)
{
//Segment to short => Skip this segment
set_spacing_left(segment_length + marker_width_/2); //Only moves forward
continue;
} else if (segment_length - spacing_left_ < marker_width_/2)
{
//Segment is long enough, but we are to close to the end
//Note: This function moves backwards. This could lead to an infinite
// loop when another function adds a positive offset. Therefore we
// only move backwards when there is no offset
if (error_ == 0)
{
set_spacing_left(segment_length - marker_width_/2, true);
} else
{
//Skip this segment
set_spacing_left(segment_length + marker_width_/2); //Only moves forward
}
continue; //Force checking of max_error constraint
}
angle = atan2(dy, dx);
x = last_x + dx * (spacing_left_ / segment_length);
y = last_y + dy * (spacing_left_ / segment_length);
box2d<double> box = perform_transform(angle, x, y);
if (!allow_overlap_ && !detector_.has_placement(box))
{
//10.0 is the approxmiate number of positions tried and choosen arbitrarily
set_spacing_left(spacing_left_ + spacing_ * max_error_ / 10.0); //Only moves forward
continue;
}
if (add_to_detector) detector_.insert(box);
last_x = x;
last_y = y;
return true;
}
}
bool freetype_engine::register_font_impl(std::string const& file_name,
font_library & library,
freetype_engine::font_file_mapping_type & font_file_mapping)
{
MAPNIK_LOG_DEBUG(font_engine_freetype) << "registering: " << file_name;
mapnik::util::file file(file_name);
if (!file) return false;
FT_Face face = 0;
FT_Open_Args args;
FT_StreamRec streamRec;
memset(&args, 0, sizeof(args));
memset(&streamRec, 0, sizeof(streamRec));
streamRec.base = 0;
streamRec.pos = 0;
streamRec.size = file.size();
streamRec.descriptor.pointer = file.get();
streamRec.read = ft_read_cb;
streamRec.close = nullptr;
args.flags = FT_OPEN_STREAM;
args.stream = &streamRec;
int num_faces = 0;
bool success = false;
// some font files have multiple fonts in a file
// the count is in the 'root' face library[0]
// see the FT_FaceRec in freetype.h
for ( int i = 0; face == 0 || i < num_faces; ++i )
{
// if face is null then this is the first face
FT_Error error = FT_Open_Face(library.get(), &args, i, &face);
if (error) break;
// store num_faces locally, after FT_Done_Face it can not be accessed any more
if (num_faces == 0)
num_faces = face->num_faces;
// some fonts can lack names, skip them
// http://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_FaceRec
if (face->family_name && face->style_name)
{
std::string name = std::string(face->family_name) + " " + std::string(face->style_name);
// skip fonts with leading . in the name
if (!boost::algorithm::starts_with(name,"."))
{
// http://stackoverflow.com/a/24795559/2333354
auto range = font_file_mapping.equal_range(name);
if (range.first == range.second) // the key was previously absent; insert a pair
{
font_file_mapping.emplace_hint(range.first, name, std::make_pair(i,file_name));
}
else // the key was present, replace the associated value
{ /* some action with value range.first->second about to be overwritten here */
MAPNIK_LOG_WARN(font_engine_freetype) << "registering new " << name << " at '" << file_name << "'";
range.first->second = std::make_pair(i,file_name); // replace value
}
success = true;
}
}
else
{
std::ostringstream s;
s << "Warning: unable to load font file '" << file_name << "' ";
if (!face->family_name && !face->style_name)
s << "which lacks both a family name and style name";
else if (face->family_name)
s << "which reports a family name of '" << std::string(face->family_name) << "' and lacks a style name";
else if (face->style_name)
s << "which reports a style name of '" << std::string(face->style_name) << "' and lacks a family name";
MAPNIK_LOG_ERROR(font_engine_freetype) << "register_font: " << s.str();
}
if (face) FT_Done_Face(face);
}
return success;
}
