124 lines
4.8 KiB
C++
124 lines
4.8 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) 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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// mapnik
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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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// 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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#include "agg_conv_stroke.h"
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#include "agg_conv_dash.h"
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// stl
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#include <string>
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namespace mapnik {
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template <typename T>
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void grid_renderer<T>::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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{
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typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
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typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
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typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
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typedef boost::mpl::vector<clip_line_tag, transform_tag,
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offset_transform_tag, affine_transform_tag,
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simplify_tag, smooth_tag, dash_tag, stroke_tag> conv_types;
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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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agg::trans_affine tr;
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auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
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if (transform) { evaluate_transform(tr, feature, *transform); }
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box2d<double> clipping_extent = common_.query_extent_;
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bool clip = get<value_bool>(sym, keys::clip, feature, true);
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double width = get<value_double>(sym, keys::stroke_width, feature, 1.0);
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double offset = get<value_double>(sym, keys::offset, feature, 0.0);
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double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, 0.0);
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double smooth = get<value_double>(sym, keys::smooth, feature, false);
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bool has_dash = has_key<dash_array>(sym, keys::stroke_dasharray);
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if (clip)
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{
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double padding = (double)(common_.query_extent_.width()/pixmap_.width());
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double half_stroke = width/2.0;
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if (half_stroke > 1)
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padding *= half_stroke;
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if (std::fabs(offset) > 0)
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padding *= std::fabs(offset) * 1.2;
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padding *= common_.scale_factor_;
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clipping_extent.pad(padding);
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}
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vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
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converter(clipping_extent,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.scale_factor_);
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if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
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converter.set<transform_tag>(); // always transform
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if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
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converter.set<affine_transform_tag>(); // optional affine transform
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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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if (has_dash) converter.set<dash_tag>();
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converter.set<stroke_tag>(); //always stroke
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for ( geometry_type & geom : feature.paths())
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{
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if (geom.size() > 1)
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{
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converter.apply(geom);
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}
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}
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// render id
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ren.color(color_type(feature.id()));
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ras_ptr->filling_rule(agg::fill_non_zero);
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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(line_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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