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126 lines
4.6 KiB
C++
126 lines
4.6 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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#if defined(GRID_RENDERER)
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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/feature.hpp>
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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/vertex_converters.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/parse_path.hpp>
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// agg
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_renderer_scanline.h"
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#include "agg_scanline_bin.h"
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// stl
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#include <string>
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#include <map>
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namespace mapnik {
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template <typename T>
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void grid_renderer<T>::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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{
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std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
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if (filename.empty()) return;
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boost::optional<mapnik::marker_ptr> mark = marker_cache::instance().find(filename, true);
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if (!mark) return;
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if (!(*mark)->is_bitmap())
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{
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
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return;
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}
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boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
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if (!pat) return;
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ras_ptr->reset();
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bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, false);
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double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
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double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);
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agg::trans_affine tr;
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auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
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if (transform)
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{
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evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
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}
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using conv_types = boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,smooth_tag>;
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vertex_converter<box2d<double>, grid_rasterizer, polygon_pattern_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
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converter(common_.query_extent_,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
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if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
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converter.set<transform_tag>(); //always transform
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converter.set<affine_transform_tag>();
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if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
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if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
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for ( geometry_type & geom : feature.paths())
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{
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if (geom.size() > 2)
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{
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converter.apply(geom);
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}
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}
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using pixfmt_type = typename grid_renderer_base_type::pixfmt_type;
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using color_type = typename grid_renderer_base_type::pixfmt_type::color_type;
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using renderer_type = agg::renderer_scanline_bin_solid<grid_renderer_base_type>;
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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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// render id
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ren.color(color_type(feature.id()));
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agg::scanline_bin sl;
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ras_ptr->filling_rule(agg::fill_even_odd);
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agg::render_scanlines(*ras_ptr, sl, ren);
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// add feature properties to grid cache
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pixmap_.add_feature(feature);
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}
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template void grid_renderer<grid>::process(polygon_pattern_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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#endif
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