103 lines
3.9 KiB
C++
103 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_helpers.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/polygon_symbolizer.hpp>
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// agg
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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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// for polygon_symbolizer
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#include "agg_renderer_scanline.h"
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#include "agg_conv_clip_polygon.h"
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#include "agg_conv_smooth_poly1.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 agg_renderer<T>::process(polygon_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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color const& fill_ = sym.get_fill();
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agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
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agg::pixfmt_rgba32_plain pixf(buf);
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unsigned r=fill_.red();
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unsigned g=fill_.green();
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unsigned b=fill_.blue();
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unsigned a=fill_.alpha();
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ras_ptr->reset();
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set_gamma_method(sym,ras_ptr);
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renderer_->attach(pixf);
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//metawriter_with_properties writer = sym.get_metawriter();
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box2d<double> inflated_extent = query_extent_ * 1.1;
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for (unsigned i=0;i<feature->num_geometries();++i)
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{
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geometry_type & geom=feature->get_geometry(i);
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if (geom.num_points() > 2)
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{
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if (sym.smooth() > 0.0)
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{
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typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
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typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
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typedef agg::conv_smooth_poly1_curve<path_type> smooth_type;
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clipped_geometry_type clipped(geom);
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clipped.clip_box(inflated_extent.minx(),inflated_extent.miny(),inflated_extent.maxx(),inflated_extent.maxy());
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path_type path(t_,clipped,prj_trans);
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smooth_type smooth(path);
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smooth.smooth_value(sym.smooth());
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ras_ptr->add_path(smooth);
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}
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else
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{
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typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
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typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
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clipped_geometry_type clipped(geom);
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clipped.clip_box(inflated_extent.minx(),inflated_extent.miny(),inflated_extent.maxx(),inflated_extent.maxy());
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path_type path(t_,clipped,prj_trans);
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ras_ptr->add_path(path);
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}
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//if (writer.first) writer.first->add_polygon(path, *feature, t_, writer.second);
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}
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}
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renderer_->color(agg::rgba8(r, g, b, int(a * sym.get_opacity())));
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renderer_->render(*ras_ptr);
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}
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template void agg_renderer<image_32>::process(polygon_symbolizer const&,
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mapnik::feature_ptr const&,
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proj_transform const&);
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}
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