112 lines
4.1 KiB
C++
112 lines
4.1 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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// boost
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#include <boost/foreach.hpp>
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// mapnik
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#include <mapnik/graphics.hpp>
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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/line_symbolizer.hpp>
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#include <mapnik/vertex_converters.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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#include "agg_renderer_scanline.h"
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#include "agg_scanline_p.h"
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#include "agg_conv_stroke.h"
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#include "agg_conv_dash.h"
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#include "agg_renderer_outline_aa.h"
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#include "agg_rasterizer_outline_aa.h"
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// stl
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#include <string>
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#include <cmath>
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namespace mapnik {
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template <typename T>
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void agg_renderer<T>::process(line_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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stroke const& stroke_ = sym.get_stroke();
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color const& col = stroke_.get_color();
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unsigned r=col.red();
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unsigned g=col.green();
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unsigned b=col.blue();
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unsigned a=col.alpha();
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ras_ptr->reset();
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set_gamma_method(stroke_, ras_ptr);
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typedef boost::mpl::vector<clip_line_tag,transform_tag, offset_transform_tag, affine_transform_tag, smooth_tag, dash_tag, stroke_tag> conv_types;
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vertex_converter<box2d<double>,rasterizer,line_symbolizer, proj_transform, CoordTransform,conv_types>
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converter(query_extent_,*ras_ptr,sym,t_,prj_trans,scale_factor_);
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if (sym.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 (fabs(sym.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 (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
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if (stroke_.has_dash()) converter.set<dash_tag>();
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converter.set<stroke_tag>(); //always stroke
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BOOST_FOREACH( geometry_type & geom, feature->paths())
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{
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if (geom.num_points() > 1)
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{
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converter.apply(geom);
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}
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}
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agg::rendering_buffer buf(current_buffer_->raw_data(),width_,height_, width_ * 4);
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typedef agg::rgba8 color_type;
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typedef agg::order_rgba order_type;
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typedef agg::pixel32_type pixel_type;
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typedef agg::comp_op_adaptor_rgba<color_type, order_type> blender_type; // comp blender
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typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
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typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
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pixfmt_comp_type pixf(buf);
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pixf.comp_op(static_cast<agg::comp_op_e>(sym.comp_op()));
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renderer_base renb(pixf);
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renderer_type ren(renb);
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ren.color(agg::rgba8(r, g, b, int(a * stroke_.get_opacity())));
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agg::scanline_u8 sl;
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agg::render_scanlines(*ras_ptr, sl, ren);
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}
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template void agg_renderer<image_32>::process(line_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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