void agg_renderer<T0,T1>::process(shield_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent();
text_symbolizer_helper helper(
sym, feature, common_.vars_, prj_trans,
common_.width_, common_.height_,
common_.scale_factor_,
common_.t_, common_.font_manager_, *common_.detector_,
clip_box);
halo_rasterizer_enum halo_rasterizer = get<halo_rasterizer_enum>(sym, keys::halo_rasterizer, feature, common_.vars_, HALO_RASTERIZER_FULL);
composite_mode_e comp_op = get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over);
composite_mode_e halo_comp_op = get<composite_mode_e>(sym, keys::halo_comp_op, feature, common_.vars_, src_over);
agg_text_renderer<T0> ren(*current_buffer_,
halo_rasterizer,
comp_op,
halo_comp_op,
common_.scale_factor_,
common_.font_manager_.get_stroker());
double opacity = get<double>(sym,keys::opacity, feature, common_.vars_, 1.0);
placements_list const& placements = helper.get();
for (glyph_positions_ptr glyphs : placements)
{
if (glyphs->marker())
render_marker(glyphs->marker_pos(),
*(glyphs->marker()->marker),
glyphs->marker()->transform,
opacity, comp_op);
ren.render(*glyphs);
}
}
void agg_renderer<T0,T1>::process(group_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
thunk_renderer<buffer_type> ren(*this, ras_ptr, current_buffer_, common_);
render_group_symbolizer(
sym, feature, common_.vars_, prj_trans, clipping_extent(common_), common_,
ren);
}
void agg_renderer<T0,T1>::process(shield_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent(common_);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
text_symbolizer_helper helper(
sym, feature, common_.vars_, prj_trans,
common_.width_, common_.height_,
common_.scale_factor_,
common_.t_, common_.font_manager_, *common_.detector_,
clip_box, tr);
pixel_position originalLocation = helper.getScreenPostion();
halo_rasterizer_enum halo_rasterizer = get<halo_rasterizer_enum>(sym, keys::halo_rasterizer, feature, common_.vars_, HALO_RASTERIZER_FULL);
composite_mode_e comp_op = get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over);
composite_mode_e halo_comp_op = get<composite_mode_e>(sym, keys::halo_comp_op, feature, common_.vars_, src_over);
agg_text_renderer<T0> ren(*current_buffer_,
halo_rasterizer,
comp_op,
halo_comp_op,
common_.scale_factor_,
common_.font_manager_.get_stroker());
double opacity = get<double>(sym,keys::opacity, feature, common_.vars_, 1.0);
placements_list const& placements = helper.get();
for (glyph_positions_ptr glyphs : placements)
{
ren.render(*glyphs, originalLocation);
if (glyphs->marker())
{
agg::trans_affine tr;
tr *= glyphs->marker()->transform; //apply any transform specified in the style xml
tr *= glyphs->marker_placement_tr(); //apply any special placement transform
render_marker(sym, feature, glyphs->marker_pos(),
*(glyphs->marker()->marker),
tr,
opacity, comp_op);
}
}
}
void agg_renderer<T0,T1>::process(group_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
render_group_symbolizer(
sym, feature, common_.vars_, prj_trans, clipping_extent(common_), common_,
[&](render_thunk_list const& thunks, pixel_position const& render_offset)
{
thunk_renderer<buffer_type> ren(*this, ras_ptr, current_buffer_, common_, render_offset);
for (render_thunk_ptr const& thunk : thunks)
{
util::apply_visitor(ren, *thunk);
}
});
}
void agg_renderer<T0,T1>::process(polygon_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
using conv_types = boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag>;
using vertex_converter_type = vertex_converter<box2d<double>, rasterizer, polygon_symbolizer,
CoordTransform, proj_transform, agg::trans_affine,
conv_types, feature_impl>;
ras_ptr->reset();
double gamma = get<value_double>(sym, keys::gamma, feature, common_.vars_, 1.0);
gamma_method_enum gamma_method = get<gamma_method_enum>(sym, keys::gamma_method, feature, common_.vars_, GAMMA_POWER);
if (gamma != gamma_ || gamma_method != gamma_method_)
{
set_gamma_method(ras_ptr, gamma, gamma_method);
gamma_method_ = gamma_method;
gamma_ = gamma;
}
box2d<double> clip_box = clipping_extent();
agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
render_polygon_symbolizer<vertex_converter_type>(
sym, feature, prj_trans, common_, clip_box, *ras_ptr,
[&](color const &fill, double opacity) {
unsigned r=fill.red();
unsigned g=fill.green();
unsigned b=fill.blue();
unsigned a=fill.alpha();
using color_type = agg::rgba8;
using order_type = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color_type, order_type>; // comp blender
using pixfmt_comp_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using renderer_base = agg::renderer_base<pixfmt_comp_type>;
using renderer_type = agg::renderer_scanline_aa_solid<renderer_base>;
pixfmt_comp_type pixf(buf);
auto comp_op = get<agg::comp_op_e>(sym, keys::comp_op, feature, common_.vars_, agg::comp_op_src_over);
pixf.comp_op(comp_op);
renderer_base renb(pixf);
renderer_type ren(renb);
ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
agg::scanline_u8 sl;
ras_ptr->filling_rule(agg::fill_even_odd);
agg::render_scanlines(*ras_ptr, sl, ren);
});
}
void grid_renderer<T>::process(text_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent(common_);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
text_symbolizer_helper helper(
sym, feature, common_.vars_, prj_trans,
common_.width_, common_.height_,
common_.scale_factor_,
common_.t_, common_.font_manager_, *common_.detector_,
clip_box, tr, common_.symbol_cache_);
bool placement_found = false;
composite_mode_e comp_op = get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over);
grid_text_renderer<T> ren(pixmap_,
comp_op,
common_.scale_factor_);
auto halo_transform = get_optional<transform_type>(sym, keys::halo_transform);
if (halo_transform)
{
agg::trans_affine halo_affine_transform;
evaluate_transform(halo_affine_transform, feature, common_.vars_, *halo_transform, common_.scale_factor_);
ren.set_halo_transform(halo_affine_transform);
}
placements_list const& placements = helper.get();
value_integer feature_id = feature.id();
for (auto const& glyphs : placements)
{
ren.render(*glyphs, feature_id);
placement_found = true;
}
if (placement_found)
{
pixmap_.add_feature(feature);
}
}
cairo_polygon_pattern(mapnik::marker const& marker,
renderer_common const& common,
symbolizer_base const& sym,
mapnik::feature_impl const& feature,
proj_transform const& prj_trans)
: cairo_pattern_base{marker, common, sym, feature, prj_trans},
clip_(get<value_bool, keys::clip>(sym_, feature_, common_.vars_)),
clip_box_(clipping_extent(common)),
tr_(geom_transform()),
converter_(clip_box_, sym, common.t_, prj_trans, tr_,
feature, common.vars_, common.scale_factor_)
{
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
converter_.template set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter_.template set<simplify_tag>();
if (smooth > 0.0) converter_.template set<smooth_tag>();
}
void agg_renderer<T>::process(text_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent();
text_symbolizer_helper helper(
sym, feature, prj_trans,
width_, height_,
scale_factor_,
t_, font_manager_, *detector_,
clip_box);
agg_text_renderer<T> ren(*current_buffer_, sym.get_halo_rasterizer(), sym.comp_op(), scale_factor_, font_manager_.get_stroker());
placements_list const& placements = helper.get();
for (glyph_positions_ptr glyphs : placements)
{
ren.render(*glyphs);
}
}
void agg_renderer<T0,T1>::process(shield_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent(common_);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
text_symbolizer_helper helper(
sym, feature, common_.vars_, prj_trans,
common_.width_, common_.height_,
common_.scale_factor_,
common_.t_, common_.font_manager_, *common_.detector_,
clip_box, tr);
halo_rasterizer_enum halo_rasterizer = get<halo_rasterizer_enum>(sym, keys::halo_rasterizer, feature, common_.vars_, HALO_RASTERIZER_FULL);
composite_mode_e comp_op = get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over);
composite_mode_e halo_comp_op = get<composite_mode_e>(sym, keys::halo_comp_op, feature, common_.vars_, src_over);
agg_text_renderer<T0> ren(*current_buffer_,
halo_rasterizer,
comp_op,
halo_comp_op,
common_.scale_factor_,
common_.font_manager_.get_stroker());
double opacity = get<double>(sym,keys::opacity, feature, common_.vars_, 1.0);
placements_list const& placements = helper.get();
for (glyph_positions_ptr glyphs : placements)
{
marker_info_ptr mark = glyphs->get_marker();
if (mark)
{
render_marker(glyphs->marker_pos(),
mark->marker_,
mark->transform_,
opacity, comp_op);
}
ren.render(*glyphs);
}
}
void agg_renderer<T0,T1>::process(line_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
color const& col = get<color, keys::stroke>(sym, feature, common_.vars_);
unsigned r=col.red();
unsigned g=col.green();
unsigned b=col.blue();
unsigned a=col.alpha();
double gamma = get<value_double, keys::stroke_gamma>(sym, feature, common_.vars_);
gamma_method_enum gamma_method = get<gamma_method_enum, keys::stroke_gamma_method>(sym, feature, common_.vars_);
ras_ptr->reset();
if (gamma != gamma_ || gamma_method != gamma_method_)
{
set_gamma_method(ras_ptr, gamma, gamma_method);
gamma_method_ = gamma_method;
gamma_ = gamma;
}
agg::rendering_buffer buf(current_buffer_->getBytes(),current_buffer_->width(),current_buffer_->height(), current_buffer_->getRowSize());
using color_type = agg::rgba8;
using order_type = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color_type, order_type>; // comp blender
using pixfmt_comp_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using renderer_base = agg::renderer_base<pixfmt_comp_type>;
pixfmt_comp_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_)));
renderer_base renb(pixf);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
box2d<double> clip_box = clipping_extent(common_);
value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
value_double width = get<value_double, keys::stroke_width>(sym, feature, common_.vars_);
value_double opacity = get<value_double,keys::stroke_opacity>(sym,feature, common_.vars_);
value_double offset = get<value_double, keys::offset>(sym, feature, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
line_rasterizer_enum rasterizer_e = get<line_rasterizer_enum, keys::line_rasterizer>(sym, feature, common_.vars_);
if (clip)
{
double padding = static_cast<double>(common_.query_extent_.width()/pixmap_.width());
double half_stroke = 0.5 * width;
if (half_stroke > 1)
{
padding *= half_stroke;
}
if (std::fabs(offset) > 0)
{
padding *= std::fabs(offset) * 1.2;
}
padding *= common_.scale_factor_;
clip_box.pad(padding);
// debugging
//box2d<double> inverse = query_extent_;
//inverse.pad(-padding);
//draw_geo_extent(inverse,mapnik::color("red"));
}
if (rasterizer_e == RASTERIZER_FAST)
{
using renderer_type = agg::renderer_outline_aa<renderer_base>;
using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;
agg::line_profile_aa profile(width * common_.scale_factor_, agg::gamma_power(gamma));
renderer_type ren(renb, profile);
ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
rasterizer_type ras(ren);
set_join_caps_aa(sym, ras, feature, common_.vars_);
vertex_converter<rasterizer_type,clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag, smooth_tag,
offset_transform_tag,
dash_tag, stroke_tag>
converter(clip_box,ras,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
converter.set<transform_tag>(); // always transform
if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
for (geometry_type const& geom : feature.paths())
{
if (geom.size() > 1)
{
vertex_adapter va(geom);
converter.apply(va);
}
}
}
else
{
vertex_converter<rasterizer,clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag, smooth_tag,
offset_transform_tag,
dash_tag, stroke_tag>
converter(clip_box,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
converter.set<transform_tag>(); // always transform
if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
if (has_key(sym, keys::stroke_dasharray))
converter.set<dash_tag>();
converter.set<stroke_tag>(); //always stroke
for (geometry_type const& geom : feature.paths())
{
if (geom.size() > 1)
{
vertex_adapter va(geom);
converter.apply(va);
}
}
using renderer_type = agg::renderer_scanline_aa_solid<renderer_base>;
renderer_type ren(renb);
ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
agg::scanline_u8 sl;
ras_ptr->filling_rule(agg::fill_non_zero);
agg::render_scanlines(*ras_ptr, sl, ren);
}
}
void agg_renderer<T0,T1>::process(line_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
using color = agg::rgba8;
using order = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
using pattern_filter_type = agg::pattern_filter_bilinear_rgba8;
using pattern_type = agg::line_image_pattern<pattern_filter_type>;
using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using renderer_base = agg::renderer_base<pixfmt_type>;
using renderer_type = agg::renderer_outline_image<renderer_base, pattern_type>;
using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;
std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
if (filename.empty()) return;
boost::optional<mapnik::marker_ptr> marker_ptr = marker_cache::instance().find(filename, true);
if (!marker_ptr || !(*marker_ptr)) return;
boost::optional<image_ptr> pat;
// TODO - re-implement at renderer level like polygon_pattern symbolizer
double opacity = get<value_double>(sym, keys::opacity, feature, common_.vars_,1.0);
if ((*marker_ptr)->is_bitmap())
{
pat = (*marker_ptr)->get_bitmap_data();
}
else
{
agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
if (image_transform) evaluate_transform(image_tr, feature, common_.vars_, *image_transform);
pat = render_pattern(*ras_ptr, **marker_ptr, image_tr, 1.0);
}
if (!pat) return;
bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, false);
double offset = get<value_double>(sym, keys::offset, feature, common_.vars_, 0.0);
double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);
agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over)));
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat), opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
rasterizer_type ras(ren);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
box2d<double> clip_box = clipping_extent(common_);
if (clip)
{
double padding = (double)(common_.query_extent_.width()/pixmap_.width());
double half_stroke = (*marker_ptr)->width()/2.0;
if (half_stroke > 1)
padding *= half_stroke;
if (std::fabs(offset) > 0)
padding *= std::fabs(offset) * 1.2;
padding *= common_.scale_factor_;
clip_box.pad(padding);
}
using conv_types = boost::mpl::vector<clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag,smooth_tag,
offset_transform_tag>;
vertex_converter<box2d<double>, rasterizer_type, line_pattern_symbolizer,
view_transform, proj_transform, agg::trans_affine, conv_types, feature_impl>
converter(clip_box,ras,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); //optional clip (default: true)
converter.set<transform_tag>(); //always transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
for (geometry_type & geom : feature.paths())
{
if (geom.size() > 1)
{
converter.apply(geom);
}
}
}
void operator() (marker_svg const& marker) const
{
using color = agg::rgba8;
using order = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
using pattern_filter_type = agg::pattern_filter_bilinear_rgba8;
using pattern_type = agg::line_image_pattern<pattern_filter_type>;
using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using renderer_base = agg::renderer_base<pixfmt_type>;
using renderer_type = agg::renderer_outline_image<renderer_base, pattern_type>;
using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;
value_double opacity = get<value_double, keys::opacity>(sym_, feature_, common_.vars_);
agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
auto image_transform = get_optional<transform_type>(sym_, keys::image_transform);
if (image_transform) evaluate_transform(image_tr, feature_, common_.vars_, *image_transform, common_.scale_factor_);
mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr;
image_rgba8 image(bbox_image.width(), bbox_image.height());
render_pattern<buffer_type>(*ras_ptr_, marker, image_tr, 1.0, image);
value_bool clip = get<value_bool, keys::clip>(sym_, feature_, common_.vars_);
value_double offset = get<value_double, keys::offset>(sym_, feature_, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym_, feature_, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym_, feature_, common_.vars_);
agg::rendering_buffer buf(current_buffer_->bytes(),current_buffer_->width(),current_buffer_->height(), current_buffer_->row_size());
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_)));
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(image, opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
double half_stroke = std::max(marker.width()/2.0,marker.height()/2.0);
int rast_clip_padding = static_cast<int>(std::round(half_stroke));
ren.clip_box(-rast_clip_padding,-rast_clip_padding,common_.width_+rast_clip_padding,common_.height_+rast_clip_padding);
rasterizer_type ras(ren);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym_, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature_, common_.vars_, *transform, common_.scale_factor_);
box2d<double> clip_box = clipping_extent(common_);
if (clip)
{
double padding = (double)(common_.query_extent_.width()/pixmap_.width());
if (half_stroke > 1)
padding *= half_stroke;
if (std::fabs(offset) > 0)
padding *= std::fabs(offset) * 1.2;
padding *= common_.scale_factor_;
clip_box.pad(padding);
}
using vertex_converter_type = vertex_converter<clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag,smooth_tag,
offset_transform_tag>;
vertex_converter_type converter(clip_box,sym_,common_.t_,prj_trans_,tr,feature_,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>();
converter.set<transform_tag>(); //always transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, rasterizer_type>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter, ras);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature_.get_geometry());
}
void operator() (marker_rgba8 const& marker)
{
using color = agg::rgba8;
using order = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
using pattern_filter_type = agg::pattern_filter_bilinear_rgba8;
using pattern_type = agg::line_image_pattern<pattern_filter_type>;
using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using renderer_base = agg::renderer_base<pixfmt_type>;
using renderer_type = agg::renderer_outline_image<renderer_base, pattern_type>;
using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;
value_double opacity = get<value_double, keys::opacity>(sym_, feature_, common_.vars_);
mapnik::image_rgba8 const& image = marker.get_data();
value_bool clip = get<value_bool, keys::clip>(sym_, feature_, common_.vars_);
value_double offset = get<value_double, keys::offset>(sym_, feature_, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym_, feature_, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym_, feature_, common_.vars_);
agg::rendering_buffer buf(current_buffer_->getBytes(),current_buffer_->width(),current_buffer_->height(), current_buffer_->getRowSize());
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_)));
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(image, opacity);
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
ren.clip_box(0,0,common_.width_,common_.height_);
rasterizer_type ras(ren);
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym_, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature_, common_.vars_, *transform, common_.scale_factor_);
box2d<double> clip_box = clipping_extent(common_);
if (clip)
{
double padding = (double)(common_.query_extent_.width()/pixmap_.width());
double half_stroke = marker.width()/2.0;
if (half_stroke > 1)
padding *= half_stroke;
if (std::fabs(offset) > 0)
padding *= std::fabs(offset) * 1.2;
padding *= common_.scale_factor_;
clip_box.pad(padding);
}
vertex_converter<rasterizer_type, clip_line_tag, transform_tag,
affine_transform_tag,
simplify_tag,smooth_tag,
offset_transform_tag>
converter(clip_box,ras,sym_,common_.t_,prj_trans_,tr,feature_,common_.vars_,common_.scale_factor_);
if (clip) converter.set<clip_line_tag>(); //optional clip (default: true)
converter.set<transform_tag>(); //always transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
for (geometry_type const& geom : feature_.paths())
{
if (geom.size() > 1)
{
vertex_adapter va(geom);
converter.apply(va);
}
}
}
void agg_renderer<T>::process(line_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
stroke const& stroke_ = sym.get_stroke();
color const& col = stroke_.get_color();
unsigned r=col.red();
unsigned g=col.green();
unsigned b=col.blue();
unsigned a=col.alpha();
ras_ptr->reset();
if (stroke_.get_gamma() != gamma_ || stroke_.get_gamma_method() != gamma_method_)
{
set_gamma_method(stroke_, ras_ptr);
gamma_method_ = stroke_.get_gamma_method();
gamma_ = stroke_.get_gamma();
}
agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
typedef boost::mpl::vector<clip_line_tag, transform_tag,
offset_transform_tag, affine_transform_tag,
simplify_tag, smooth_tag, dash_tag, stroke_tag> conv_types;
pixfmt_comp_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(sym.comp_op()));
renderer_base renb(pixf);
agg::trans_affine tr;
evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);
box2d<double> clip_box = clipping_extent();
if (sym.clip())
{
double padding = (double)(query_extent_.width()/pixmap_.width());
double half_stroke = stroke_.get_width()/2.0;
if (half_stroke > 1)
padding *= half_stroke;
if (std::fabs(sym.offset()) > 0)
padding *= std::fabs(sym.offset()) * 1.2;
padding *= scale_factor_;
clip_box.pad(padding);
// debugging
//box2d<double> inverse = query_extent_;
//inverse.pad(-padding);
//draw_geo_extent(inverse,mapnik::color("red"));
}
if (sym.get_rasterizer() == RASTERIZER_FAST)
{
typedef agg::renderer_outline_aa<renderer_base> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
agg::line_profile_aa profile(stroke_.get_width() * scale_factor_, agg::gamma_power(stroke_.get_gamma()));
renderer_type ren(renb, profile);
ren.color(agg::rgba8_pre(r, g, b, int(a*stroke_.get_opacity())));
rasterizer_type ras(ren);
set_join_caps_aa(stroke_,ras);
vertex_converter<box2d<double>, rasterizer_type, line_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(clip_box,ras,sym,t_,prj_trans,tr,scale_factor_);
if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
converter.set<transform_tag>(); // always transform
if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
for (geometry_type & geom : feature.paths())
{
if (geom.size() > 1)
{
converter.apply(geom);
}
}
}
else
{
vertex_converter<box2d<double>, rasterizer, line_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(clip_box,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);
if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
converter.set<transform_tag>(); // always transform
if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
if (stroke_.has_dash()) converter.set<dash_tag>();
converter.set<stroke_tag>(); //always stroke
for (geometry_type & geom : feature.paths())
{
if (geom.size() > 1)
{
converter.apply(geom);
}
}
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
renderer_type ren(renb);
ren.color(agg::rgba8_pre(r, g, b, int(a * stroke_.get_opacity())));
agg::scanline_u8 sl;
ras_ptr->filling_rule(agg::fill_non_zero);
agg::render_scanlines(*ras_ptr, sl, ren);
}
}
void operator() (marker_svg const& marker)
{
agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
auto image_transform = get_optional<transform_type>(sym_, keys::image_transform);
if (image_transform) evaluate_transform(image_tr, feature_, common_.vars_, *image_transform);
mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr;
mapnik::image_rgba8 image(bbox_image.width(), bbox_image.height());
render_pattern<buffer_type>(*ras_ptr_, marker, image_tr, 1.0, image);
agg::rendering_buffer buf(current_buffer_->bytes(), current_buffer_->width(),
current_buffer_->height(), current_buffer_->row_size());
ras_ptr_->reset();
value_double gamma = get<value_double, keys::gamma>(sym_, feature_, common_.vars_);
gamma_method_enum gamma_method = get<gamma_method_enum, keys::gamma_method>(sym_, feature_, common_.vars_);
if (gamma != gamma_ || gamma_method != gamma_method_)
{
set_gamma_method(ras_ptr_, gamma, gamma_method);
gamma_method_ = gamma_method;
gamma_ = gamma;
}
value_bool clip = get<value_bool, keys::clip>(sym_, feature_, common_.vars_);
value_double opacity = get<double, keys::opacity>(sym_, feature_, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym_, feature_, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym_, feature_, common_.vars_);
box2d<double> clip_box = clipping_extent(common_);
using color = agg::rgba8;
using order = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using wrap_x_type = agg::wrap_mode_repeat;
using wrap_y_type = agg::wrap_mode_repeat;
using img_source_type = agg::image_accessor_wrap<agg::pixfmt_rgba32_pre,
wrap_x_type,
wrap_y_type>;
using span_gen_type = agg::span_pattern_rgba<img_source_type>;
using ren_base = agg::renderer_base<pixfmt_type>;
using renderer_type = agg::renderer_scanline_aa_alpha<ren_base,
agg::span_allocator<agg::rgba8>,
span_gen_type>;
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym_, feature_, common_.vars_)));
ren_base renb(pixf);
unsigned w = image.width();
unsigned h = image.height();
agg::rendering_buffer pattern_rbuf((agg::int8u*)image.bytes(),w,h,w*4);
agg::pixfmt_rgba32_pre pixf_pattern(pattern_rbuf);
img_source_type img_src(pixf_pattern);
pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym_, feature_, common_.vars_);
unsigned offset_x=0;
unsigned offset_y=0;
if (alignment == LOCAL_ALIGNMENT)
{
double x0 = 0;
double y0 = 0;
using apply_local_alignment = detail::apply_local_alignment;
apply_local_alignment apply(common_.t_,prj_trans_, clip_box, x0, y0);
util::apply_visitor(geometry::vertex_processor<apply_local_alignment>(apply), feature_.get_geometry());
offset_x = unsigned(current_buffer_->width() - x0);
offset_y = unsigned(current_buffer_->height() - y0);
}
span_gen_type sg(img_src, offset_x, offset_y);
agg::span_allocator<agg::rgba8> sa;
renderer_type rp(renb,sa, sg, unsigned(opacity * 255));
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym_, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature_, common_.vars_, *transform, common_.scale_factor_);
using vertex_converter_type = vertex_converter<clip_poly_tag,
transform_tag,
affine_transform_tag,
simplify_tag,
smooth_tag>;
vertex_converter_type converter(clip_box,sym_,common_.t_,prj_trans_,tr,feature_,common_.vars_,common_.scale_factor_);
if (prj_trans_.equal() && clip) converter.set<clip_poly_tag>();
converter.set<transform_tag>(); //always transform
converter.set<affine_transform_tag>(); // optional affine transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, rasterizer>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter, *ras_ptr_);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature_.get_geometry());
agg::scanline_u8 sl;
ras_ptr_->filling_rule(agg::fill_even_odd);
agg::render_scanlines(*ras_ptr_, sl, rp);
}
void agg_renderer<T0,T1>::process(polygon_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
if (filename.empty()) return;
std::shared_ptr<mapnik::marker const> marker = marker_cache::instance().find(filename, true);
buffer_type & current_buffer = buffers_.top().get();
agg::rendering_buffer buf(current_buffer.bytes(), current_buffer.width(),
current_buffer.height(), current_buffer.row_size());
ras_ptr->reset();
value_double gamma = get<value_double, keys::gamma>(sym, feature, common_.vars_);
gamma_method_enum gamma_method = get<gamma_method_enum, keys::gamma_method>(sym, feature, common_.vars_);
if (gamma != gamma_ || gamma_method != gamma_method_)
{
set_gamma_method(ras_ptr, gamma, gamma_method);
gamma_method_ = gamma_method;
gamma_ = gamma;
}
value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
value_double opacity = get<double, keys::opacity>(sym, feature, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
using color = agg::rgba8;
using order = agg::order_rgba;
using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
using wrap_x_type = agg::wrap_mode_repeat;
using wrap_y_type = agg::wrap_mode_repeat;
using img_source_type = agg::image_accessor_wrap<agg::pixfmt_rgba32_pre,
wrap_x_type,
wrap_y_type>;
using span_gen_type = agg::span_pattern_rgba<img_source_type>;
using ren_base = agg::renderer_base<pixfmt_type>;
using renderer_type = agg::renderer_scanline_aa_alpha<ren_base,
agg::span_allocator<agg::rgba8>,
span_gen_type>;
pixfmt_type pixf(buf);
pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_)));
ren_base renb(pixf);
common_pattern_process_visitor<polygon_pattern_symbolizer, rasterizer> visitor(*ras_ptr, common_, sym, feature);
image_rgba8 image(util::apply_visitor(visitor, *marker));
unsigned w = image.width();
unsigned h = image.height();
agg::rendering_buffer pattern_rbuf((agg::int8u*)image.bytes(),w,h,w*4);
agg::pixfmt_rgba32_pre pixf_pattern(pattern_rbuf);
img_source_type img_src(pixf_pattern);
box2d<double> clip_box = clipping_extent(common_);
coord<unsigned, 2> offset(detail::offset(sym, feature, prj_trans, common_, clip_box));
span_gen_type sg(img_src, offset.x, offset.y);
agg::span_allocator<agg::rgba8> sa;
renderer_type rp(renb,sa, sg, unsigned(opacity * 255));
agg::trans_affine tr;
auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
using vertex_converter_type = vertex_converter<clip_poly_tag,
transform_tag,
affine_transform_tag,
simplify_tag,
smooth_tag>;
vertex_converter_type converter(clip_box, sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (prj_trans.equal() && clip) converter.set<clip_poly_tag>();
converter.set<transform_tag>(); //always transform
converter.set<affine_transform_tag>(); // optional affine transform
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, rasterizer>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter, *ras_ptr);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature.get_geometry());
agg::scanline_u8 sl;
ras_ptr->filling_rule(agg::fill_even_odd);
agg::render_scanlines(*ras_ptr, sl, rp);
}
void cairo_renderer<T>::process(polygon_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_);
std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
value_double opacity = get<value_double, keys::opacity>(sym, feature, common_.vars_);
agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
if (image_transform) evaluate_transform(image_tr, feature, common_.vars_, *image_transform);
cairo_save_restore guard(context_);
context_.set_operator(comp_op);
boost::optional<mapnik::marker_ptr> marker = mapnik::marker_cache::instance().find(filename,true);
if (!marker || !(*marker)) return;
unsigned offset_x=0;
unsigned offset_y=0;
box2d<double> const& clip_box = clipping_extent(common_);
pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym, feature, common_.vars_);
if (alignment == LOCAL_ALIGNMENT)
{
double x0 = 0.0;
double y0 = 0.0;
if (feature.num_geometries() > 0)
{
using clipped_geometry_type = agg::conv_clip_polygon<geometry_type>;
using path_type = transform_path_adapter<view_transform,clipped_geometry_type>;
clipped_geometry_type clipped(feature.get_geometry(0));
clipped.clip_box(clip_box.minx(), clip_box.miny(),
clip_box.maxx(), clip_box.maxy());
path_type path(common_.t_, clipped, prj_trans);
path.vertex(&x0, &y0);
}
offset_x = std::abs(clip_box.width() - x0);
offset_y = std::abs(clip_box.height() - y0);
}
if ((*marker)->is_bitmap())
{
cairo_pattern pattern(**((*marker)->get_bitmap_data()), opacity);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x, offset_y);
context_.set_pattern(pattern);
}
else
{
mapnik::rasterizer ras;
image_ptr image = render_pattern(ras, **marker, image_tr, 1.0); //
cairo_pattern pattern(*image, opacity);
pattern.set_extend(CAIRO_EXTEND_REPEAT);
pattern.set_origin(offset_x, offset_y);
context_.set_pattern(pattern);
}
agg::trans_affine tr;
auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (geom_transform) {
evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_);
}
vertex_converter<cairo_context,clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag>
converter(clip_box, context_,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
converter.set<transform_tag>(); //always transform
converter.set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
for ( geometry_type & geom : feature.paths())
{
if (geom.size() > 2)
{
converter.apply(geom);
}
}
// fill polygon
context_.set_fill_rule(CAIRO_FILL_RULE_EVEN_ODD);
context_.fill();
}
void cairo_renderer<T>::process(polygon_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_);
std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
value_double opacity = get<value_double, keys::opacity>(sym, feature, common_.vars_);
agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
if (image_transform) evaluate_transform(image_tr, feature, common_.vars_, *image_transform);
cairo_save_restore guard(context_);
context_.set_operator(comp_op);
std::shared_ptr<mapnik::marker const> marker = mapnik::marker_cache::instance().find(filename,true);
if (marker->is<mapnik::marker_null>()) return;
unsigned offset_x=0;
unsigned offset_y=0;
box2d<double> const& clip_box = clipping_extent(common_);
pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym, feature, common_.vars_);
if (alignment == LOCAL_ALIGNMENT)
{
double x0 = 0.0;
double y0 = 0.0;
using apply_local_alignment = detail::apply_local_alignment;
apply_local_alignment apply(common_.t_, prj_trans, clip_box, x0, y0);
util::apply_visitor(geometry::vertex_processor<apply_local_alignment>(apply), feature.get_geometry());
offset_x = std::abs(clip_box.width() - x0);
offset_y = std::abs(clip_box.height() - y0);
}
util::apply_visitor(cairo_renderer_process_visitor_p(context_, image_tr, offset_x, offset_y, opacity), *marker);
agg::trans_affine tr;
auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
if (geom_transform) { evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_); }
using vertex_converter_type = vertex_converter<
clip_poly_tag,
transform_tag,
affine_transform_tag,
simplify_tag,
smooth_tag>;
vertex_converter_type converter(clip_box,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
converter.set<transform_tag>(); //always transform
converter.set<affine_transform_tag>();
if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
using apply_vertex_converter_type = detail::apply_vertex_converter<vertex_converter_type, cairo_context>;
using vertex_processor_type = geometry::vertex_processor<apply_vertex_converter_type>;
apply_vertex_converter_type apply(converter, context_);
mapnik::util::apply_visitor(vertex_processor_type(apply),feature.get_geometry());
// fill polygon
context_.set_fill_rule(CAIRO_FILL_RULE_EVEN_ODD);
context_.fill();
}