229 lines
7.8 KiB
C++
229 lines
7.8 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_AGG_RENDERER_HPP
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#define MAPNIK_AGG_RENDERER_HPP
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// mapnik
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#include <mapnik/config.hpp> // for MAPNIK_DECL
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#include <mapnik/feature_style_processor.hpp>
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#include <mapnik/util/noncopyable.hpp> // for noncopyable
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#include <mapnik/rule.hpp> // for rule, symbolizers
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#include <mapnik/geometry/box2d.hpp> // for box2d
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#include <mapnik/view_transform.hpp> // for view_transform
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#include <mapnik/image_compositing.hpp> // for composite_mode_e
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#include <mapnik/pixel_position.hpp>
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#include <mapnik/request.hpp>
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#include <mapnik/symbolizer_enumerations.hpp>
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#include <mapnik/renderer_common.hpp>
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#include <mapnik/image_util.hpp>
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// stl
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#include <memory>
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#include <stack>
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// fwd declaration to avoid dependence on agg headers
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namespace agg { struct trans_affine; }
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// fwd declarations to speed up compile
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namespace mapnik {
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class Map;
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class feature_impl;
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class feature_type_style;
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class label_collision_detector4;
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class layer;
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class color;
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struct marker;
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class proj_transform;
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struct rasterizer;
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struct rgba8_t;
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template<typename T> class image;
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}
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namespace mapnik {
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template <typename T>
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class buffer_stack
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{
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public:
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buffer_stack(std::size_t width, std::size_t height)
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: width_(width),
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height_(height),
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buffers_(),
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position_(buffers_.begin())
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{
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}
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T & push()
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{
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if (position_ == buffers_.begin())
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{
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buffers_.emplace_front(width_, height_);
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position_ = buffers_.begin();
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}
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else
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{
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--position_;
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mapnik::fill(*position_, 0); // fill with transparent colour
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}
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return *position_;
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}
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bool in_range() const
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{
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return (position_ != buffers_.end());
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}
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void pop()
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{
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// ^ ensure irator is not out-of-range
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// prior calling this method
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++position_;
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}
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T & top() const
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{
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return *position_;
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}
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private:
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const std::size_t width_;
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const std::size_t height_;
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std::deque<T> buffers_;
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typename std::deque<T>::iterator position_;
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};
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template <typename T0, typename T1=label_collision_detector4>
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class MAPNIK_DECL agg_renderer : public feature_style_processor<agg_renderer<T0> >,
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private util::noncopyable
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{
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public:
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using buffer_type = T0;
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using processor_impl_type = agg_renderer<T0>;
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using detector_type = T1;
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// create with default, empty placement detector
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agg_renderer(Map const& m, buffer_type & pixmap, double scale_factor=1.0, unsigned offset_x=0, unsigned offset_y=0);
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// create with external placement detector, possibly non-empty
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agg_renderer(Map const &m, buffer_type & pixmap, std::shared_ptr<detector_type> detector,
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double scale_factor=1.0, unsigned offset_x=0, unsigned offset_y=0);
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// pass in mapnik::request object to provide the mutable things per render
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agg_renderer(Map const& m, request const& req, attributes const& vars, buffer_type & pixmap, double scale_factor=1.0, unsigned offset_x=0, unsigned offset_y=0);
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~agg_renderer();
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void start_map_processing(Map const& map);
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void end_map_processing(Map const& map);
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void start_layer_processing(layer const& lay, box2d<double> const& query_extent);
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void end_layer_processing(layer const& lay);
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void start_style_processing(feature_type_style const& st);
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void end_style_processing(feature_type_style const& st);
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void render_marker(pixel_position const& pos, marker const& marker, agg::trans_affine const& tr,
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double opacity, composite_mode_e comp_op);
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void process(point_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(line_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(line_pattern_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(polygon_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(polygon_pattern_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(raster_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(shield_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(text_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(building_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(markers_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(group_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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void process(debug_symbolizer const& sym,
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feature_impl & feature,
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proj_transform const& prj_trans);
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void process(dot_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans);
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inline bool process(rule::symbolizers const&,
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mapnik::feature_impl&,
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proj_transform const& )
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{
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// agg renderer doesn't support processing of multiple symbolizers.
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return false;
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}
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void painted(bool painted);
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bool painted();
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inline eAttributeCollectionPolicy attribute_collection_policy() const
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{
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return DEFAULT;
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}
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inline double scale_factor() const
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{
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return common_.scale_factor_;
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}
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inline attributes const& variables() const
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{
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return common_.vars_;
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}
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protected:
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template <typename R>
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void debug_draw_box(R& buf, box2d<double> const& extent,
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double x, double y, double angle = 0.0);
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void debug_draw_box(box2d<double> const& extent,
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double x, double y, double angle = 0.0);
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void draw_geo_extent(box2d<double> const& extent,mapnik::color const& color);
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private:
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std::stack<std::reference_wrapper<buffer_type>> buffers_;
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buffer_stack<buffer_type> internal_buffers_;
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std::unique_ptr<buffer_type> inflated_buffer_;
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const std::unique_ptr<rasterizer> ras_ptr;
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gamma_method_enum gamma_method_;
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double gamma_;
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renderer_common common_;
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void setup(Map const & m, buffer_type & pixmap);
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};
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extern template class MAPNIK_DECL agg_renderer<image<rgba8_t>>;
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} // namespace mapnik
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#endif // MAPNIK_AGG_RENDERER_HPP
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