122 lines
3.9 KiB
C++
122 lines
3.9 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/agg_renderer.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/metawriter.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_pixfmt_rgba.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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// stl
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#include <string>
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// boost
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#include <boost/make_shared.hpp>
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namespace mapnik {
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template <typename T>
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void agg_renderer<T>::process(point_symbolizer const& sym,
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Feature const& feature,
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proj_transform const& prj_trans)
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{
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std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);
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boost::optional<mapnik::marker_ptr> marker;
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if ( !filename.empty() )
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{
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marker = marker_cache::instance()->find(filename, true);
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}
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else
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{
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marker.reset(boost::make_shared<mapnik::marker>());
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}
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if (marker)
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{
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int w = (*marker)->width();
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int h = (*marker)->height();
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agg::trans_affine tr;
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boost::array<double,6> const& m = sym.get_transform();
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tr.load_from(&m[0]);
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double px0 = - 0.5 * w;
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double py0 = - 0.5 * h;
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double px1 = 0.5 * w;
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double py1 = 0.5 * h;
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double px2 = px1;
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double py2 = py0;
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double px3 = px0;
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double py3 = py1;
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tr.transform(&px0,&py0);
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tr.transform(&px1,&py1);
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tr.transform(&px2,&py2);
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tr.transform(&px3,&py3);
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box2d<double> label_ext (px0, py0, px1, py1);
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label_ext.expand_to_include(px2, py2);
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label_ext.expand_to_include(px3, py3);
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for (unsigned i=0; i<feature.num_geometries(); ++i)
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{
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geometry_type const& geom = feature.get_geometry(i);
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double x;
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double y;
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double z=0;
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if (sym.get_point_placement() == CENTROID_POINT_PLACEMENT)
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geom.label_position(&x, &y);
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else
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geom.label_interior_position(&x, &y);
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prj_trans.backward(x,y,z);
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t_.forward(&x,&y);
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label_ext.re_center(x,y);
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if (sym.get_allow_overlap() ||
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detector_->has_placement(label_ext))
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{
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render_marker(floor(x - 0.5 * w),floor(y - 0.5 * h) ,**marker,tr, sym.get_opacity());
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if (!sym.get_ignore_placement())
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detector_->insert(label_ext);
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metawriter_with_properties writer = sym.get_metawriter();
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if (writer.first) writer.first->add_box(label_ext, feature, t_, writer.second);
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}
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}
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}
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}
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template void agg_renderer<image_32>::process(point_symbolizer const&,
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Feature const&,
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proj_transform const&);
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}
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