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https://github.com/mapnik/mapnik.git
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81566a8f80
(de-multiply in end_map_processing()) + support for compositing at style level + image blur (TODO)
109 lines
4.0 KiB
C++
109 lines
4.0 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/agg_pattern_source.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/line_pattern_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_outline.h"
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#include "agg_rasterizer_outline_aa.h"
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#include "agg_scanline_u.h"
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//
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#include "agg_renderer_scanline.h"
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#include "agg_pattern_filters_rgba.h"
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#include "agg_span_allocator.h"
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#include "agg_span_pattern_rgba.h"
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#include "agg_renderer_outline_image.h"
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#include "agg_conv_clip_polyline.h"
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namespace mapnik {
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template <typename T>
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void agg_renderer<T>::process(line_pattern_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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typedef agg::conv_clip_polyline<geometry_type> clipped_geometry_type;
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typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
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typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
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typedef agg::renderer_base<agg::pixfmt_rgba32> renderer_base;
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typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
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typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
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agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
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agg::pixfmt_rgba32 pixf(buf);
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std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
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boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
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if (!mark) return;
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if (!(*mark)->is_bitmap())
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{
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std::clog << "### Warning only images (not '" << filename << "') are supported in the line_pattern_symbolizer\n";
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return;
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}
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boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
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if (!pat) return;
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box2d<double> ext = query_extent_ * 1.1;
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renderer_base ren_base(pixf);
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agg::pattern_filter_bilinear_rgba8 filter;
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pattern_source source(*(*pat));
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pattern_type pattern (filter,source);
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renderer_type ren(ren_base, pattern);
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// TODO - should be sensitive to buffer size
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ren.clip_box(0,0,width_,height_);
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rasterizer_type ras(ren);
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//metawriter_with_properties writer = sym.get_metawriter();
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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() > 1)
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{
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clipped_geometry_type clipped(geom);
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clipped.clip_box(ext.minx(),ext.miny(),ext.maxx(),ext.maxy());
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path_type path(t_,clipped,prj_trans);
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ras.add_path(path);
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//if (writer.first) writer.first->add_line(path, *feature, t_, writer.second);
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}
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}
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}
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template void agg_renderer<image_32>::process(line_pattern_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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