201 lines
7.1 KiB
C++
201 lines
7.1 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) 2011 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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#if defined(GRID_RENDERER)
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// mapnik
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#include <mapnik/grid/grid_rasterizer.hpp>
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#include <mapnik/grid/grid_renderer.hpp>
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#include <mapnik/grid/grid_renderer_base.hpp>
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#include <mapnik/grid/grid.hpp>
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#include <mapnik/image_scaling.hpp>
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#include <mapnik/rule.hpp>
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#include <mapnik/debug.hpp>
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#include <mapnik/layer.hpp>
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#include <mapnik/label_collision_detector.hpp>
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#include <mapnik/feature_type_style.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/font_set.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/map.hpp>
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#include <mapnik/request.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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#include <mapnik/svg/svg_renderer_agg.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/pixel_position.hpp>
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// boost
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#include <boost/math/special_functions/round.hpp>
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// agg
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#include "agg_trans_affine.h"
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namespace mapnik
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{
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template <typename T>
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grid_renderer<T>::grid_renderer(Map const& m, T & pixmap, double scale_factor, unsigned offset_x, unsigned offset_y)
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: feature_style_processor<grid_renderer>(m, scale_factor),
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pixmap_(pixmap),
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ras_ptr(new grid_rasterizer),
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common_(m, attributes(), offset_x, offset_y, m.width(), m.height(), scale_factor)
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{
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setup(m);
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}
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template <typename T>
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grid_renderer<T>::grid_renderer(Map const& m, request const& req, attributes const& vars, T & pixmap, double scale_factor, unsigned offset_x, unsigned offset_y)
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: feature_style_processor<grid_renderer>(m, scale_factor),
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pixmap_(pixmap),
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ras_ptr(new grid_rasterizer),
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common_(m, req, vars, offset_x, offset_y, req.width(), req.height(), scale_factor)
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{
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setup(m);
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}
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template <typename T>
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void grid_renderer<T>::setup(Map const& m)
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{
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: Scale=" << m.scale();
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// nothing to do for grids yet on setup
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}
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template <typename T>
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grid_renderer<T>::~grid_renderer() {}
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template <typename T>
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void grid_renderer<T>::start_map_processing(Map const& m)
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{
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: Start map processing bbox=" << m.get_current_extent();
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ras_ptr->clip_box(0,0,common_.width_,common_.height_);
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}
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template <typename T>
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void grid_renderer<T>::end_map_processing(Map const& /*m*/)
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{
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: End map processing";
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}
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template <typename T>
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void grid_renderer<T>::start_layer_processing(layer const& lay, box2d<double> const& query_extent)
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{
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: Start processing layer=" << lay.name();
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: datasource=" << lay.datasource().get();
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: query_extent = " << query_extent;
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if (lay.clear_label_cache())
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{
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common_.detector_->clear();
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}
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common_.query_extent_ = query_extent;
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boost::optional<box2d<double> > const& maximum_extent = lay.maximum_extent();
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if (maximum_extent)
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{
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common_.query_extent_.clip(*maximum_extent);
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}
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}
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template <typename T>
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void grid_renderer<T>::end_layer_processing(layer const&)
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{
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MAPNIK_LOG_DEBUG(grid_renderer) << "grid_renderer: End layer processing";
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}
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template <typename T>
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void grid_renderer<T>::render_marker(mapnik::feature_impl const& feature, pixel_position const& pos, marker const& marker, agg::trans_affine const& tr, double opacity, composite_mode_e /*comp_op*/)
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{
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if (marker.is_vector())
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{
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using pixfmt_type = typename grid_renderer_base_type::pixfmt_type;
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using renderer_type = agg::renderer_scanline_bin_solid<grid_renderer_base_type>;
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agg::scanline_bin sl;
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grid_rendering_buffer buf(pixmap_.raw_data(), common_.width_, common_.height_, common_.width_);
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pixfmt_type pixf(buf);
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grid_renderer_base_type renb(pixf);
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renderer_type ren(renb);
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ras_ptr->reset();
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box2d<double> const& bbox = (*marker.get_vector_data())->bounding_box();
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coord<double,2> c = bbox.center();
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// center the svg marker on '0,0'
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agg::trans_affine mtx = agg::trans_affine_translation(-c.x,-c.y);
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// apply symbol transformation to get to map space
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mtx *= tr;
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mtx *= agg::trans_affine_scaling(common_.scale_factor_);
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// render the marker at the center of the marker box
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mtx.translate(pos.x, pos.y);
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using namespace mapnik::svg;
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vertex_stl_adapter<svg_path_storage> stl_storage((*marker.get_vector_data())->source());
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svg_path_adapter svg_path(stl_storage);
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svg_renderer_agg<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer_type,
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pixfmt_type> svg_renderer(svg_path,
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(*marker.get_vector_data())->attributes());
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svg_renderer.render_id(*ras_ptr, sl, renb, feature.id(), mtx, opacity, bbox);
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}
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else
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{
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image_data_32 const& data = **marker.get_bitmap_data();
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double width = data.width();
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double height = data.height();
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double cx = 0.5 * width;
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double cy = 0.5 * height;
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if ((std::fabs(1.0 - common_.scale_factor_) < 0.001 && tr.is_identity()))
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{
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// TODO - support opacity
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pixmap_.set_rectangle(feature.id(), data,
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boost::math::iround(pos.x - cx),
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boost::math::iround(pos.y - cy));
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}
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else
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{
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image_data_32 target(data.width(), data.height());
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mapnik::scale_image_agg<image_data_32>(target,
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data,
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SCALING_NEAR,
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1,
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1,
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0.0, 0.0, 1.0); // TODO: is 1.0 a valid default here, and do we even care in grid_renderer what the image looks like?
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pixmap_.set_rectangle(feature.id(), target,
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boost::math::iround(pos.x - cx),
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boost::math::iround(pos.y - cy));
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}
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}
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pixmap_.add_feature(feature);
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}
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template class grid_renderer<grid>;
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}
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#endif
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