186 lines
6 KiB
C++
186 lines
6 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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//$Id$
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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_pixfmt.hpp>
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#include <mapnik/grid/grid_pixel.hpp>
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#include <mapnik/grid/grid.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/config_error.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/text_path.hpp>
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#include <mapnik/map.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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#include <mapnik/svg/svg_renderer.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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// boost
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#include <boost/utility.hpp>
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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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// stl
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#ifdef MAPNIK_DEBUG
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#include <iostream>
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#endif
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//#include <cmath>
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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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width_(pixmap_.width()),
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height_(pixmap_.height()),
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scale_factor_(scale_factor),
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t_(pixmap_.width(),pixmap_.height(),m.get_current_extent(),offset_x,offset_y),
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font_engine_(),
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font_manager_(font_engine_),
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detector_(box2d<double>(-m.buffer_size(), -m.buffer_size(), pixmap_.width() + m.buffer_size(), pixmap_.height() + m.buffer_size())),
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ras_ptr(new grid_rasterizer)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "scale=" << m.scale() << "\n";
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#endif
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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& map)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "start map processing bbox="
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<< map.get_current_extent() << "\n";
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#endif
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ras_ptr->clip_box(0,0,width_,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& )
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "end map processing\n";
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#endif
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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)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "start layer processing : " << lay.name() << "\n";
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std::clog << "datasource = " << lay.datasource().get() << "\n";
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#endif
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if (lay.clear_label_cache())
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{
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detector_.clear();
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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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#ifdef MAPNIK_DEBUG
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std::clog << "end layer processing\n";
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#endif
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}
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template <typename T>
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void grid_renderer<T>::render_marker(mapnik::feature_ptr const& feature, unsigned int step, pixel_position const& pos, marker const& marker, agg::trans_affine const& tr, double opacity)
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{
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if (marker.is_vector())
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{
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typedef coord_transform2<CoordTransform,geometry_type> path_type;
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typedef agg::renderer_base<mapnik::pixfmt_gray16> ren_base;
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typedef agg::renderer_scanline_bin_solid<ren_base> renderer;
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agg::scanline_bin sl;
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grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
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mapnik::pixfmt_gray16 pixf(buf);
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ren_base renb(pixf);
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renderer 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(scale_factor_*(1.0/step));
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// render the marker at the center of the marker box
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mtx.translate(pos.x+0.5 * marker.width(), pos.y+0.5 * marker.height());
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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<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer,
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mapnik::pixfmt_gray16> 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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if (step == 1 && scale_factor_ == 1.0)
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{
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pixmap_.set_rectangle(feature->id(), data,
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boost::math::iround(pos.x),
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boost::math::iround(pos.y));
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}
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else
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{
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double ratio = (1.0/step);
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image_data_32 target(ratio * data.width(), ratio * data.height());
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mapnik::scale_image_agg<image_data_32>(target,data, SCALING_NEAR,
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scale_factor_, 0.0, 0.0, 1.0, ratio);
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pixmap_.set_rectangle(feature->id(), target,
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boost::math::iround(pos.x),
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boost::math::iround(pos.y));
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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 hit_grid<boost::uint16_t>;
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template class grid_renderer<grid>;
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}
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