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73 lines
2.4 KiB
C++
73 lines
2.4 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) 2015 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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#ifndef MAPNIK_GRID_MARKER_HELPERS_HPP
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#define MAPNIK_GRID_MARKER_HELPERS_HPP
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// mapnik
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#include <mapnik/feature.hpp>
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// agg
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#include "agg_renderer_scanline.h"
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#include "agg_scanline_bin.h"
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#include "agg_image_filters.h"
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#include "agg_trans_bilinear.h"
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#include "agg_span_allocator.h"
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#include "agg_image_accessors.h"
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#include "agg_span_image_filter_gray.h"
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namespace mapnik {
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template <typename RendererType, typename RasterizerType>
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void render_raster_marker(RendererType ren,
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RasterizerType & ras,
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image_rgba8 const& src,
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mapnik::feature_impl const& feature,
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agg::trans_affine const& marker_tr,
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double opacity)
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{
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using color_type = typename RendererType::color_type;
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agg::scanline_bin sl;
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double width = src.width();
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double height = src.height();
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double p[8];
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p[0] = 0; p[1] = 0;
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p[2] = width; p[3] = 0;
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p[4] = width; p[5] = height;
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p[6] = 0; p[7] = height;
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marker_tr.transform(&p[0], &p[1]);
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marker_tr.transform(&p[2], &p[3]);
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marker_tr.transform(&p[4], &p[5]);
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marker_tr.transform(&p[6], &p[7]);
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ras.move_to_d(p[0],p[1]);
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ras.line_to_d(p[2],p[3]);
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ras.line_to_d(p[4],p[5]);
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ras.line_to_d(p[6],p[7]);
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ren.color(color_type(feature.id()));
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agg::render_scanlines(ras, sl, ren);
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}
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}
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#endif
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