123 lines
4 KiB
C++
123 lines
4 KiB
C++
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/*****************************************************************************
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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) 2010 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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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/image_cache.hpp>
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#include <mapnik/svg/marker_cache.hpp>
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#include <mapnik/markers_placement.hpp>
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#include <mapnik/arrow.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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namespace mapnik {
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struct rasterizer : agg::rasterizer_scanline_aa<>, boost::noncopyable {};
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template <typename T>
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void agg_renderer<T>::process(markers_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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typedef coord_transform2<CoordTransform,geometry2d> path_type;
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typedef agg::pixfmt_rgba32 pixfmt;
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typedef agg::renderer_base<pixfmt> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
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bool svg_marker;
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arrow arrow_;
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box2d<double> extent;
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boost::optional<path_ptr> marker;
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ras_ptr->reset();
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ras_ptr->gamma(agg::gamma_linear());
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agg::scanline_u8 sl;
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agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
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pixfmt pixf(buf);
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renderer_base renb(pixf);
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renderer_solid ren(renb);
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color const& fill_ = sym.get_fill();
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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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for (unsigned i=0; i<feature.num_geometries(); ++i)
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{
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geometry2d const& geom = feature.get_geometry(i);
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if (geom.num_points() <= 1) continue;
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svg_marker = false;
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extent = arrow_.extent();
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std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);
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if (!filename.empty())
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{
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marker = mapnik::marker_cache::instance()->find(filename, true);
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if (marker && *marker)
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{
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svg_marker = true;
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double x1, y1, x2, y2;
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(*marker)->bounding_rect(&x1, &y1, &x2, &y2);
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extent.init(x1, y1, x2, y2);
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}
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}
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path_type path(t_,geom,prj_trans);
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markers_placement<path_type, label_collision_detector4> placement(path, extent, detector_,
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sym.get_spacing(),
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sym.get_max_error(),
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sym.get_allow_overlap());
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double x, y, angle;
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while (placement.get_point(&x, &y, &angle))
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{
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agg::trans_affine matrix = agg::trans_affine_rotation(angle) * agg::trans_affine_translation(x, y);
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if (svg_marker)
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{
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(*marker)->render(*ras_ptr, sl, ren, matrix, renb.clip_box(), 1.0);
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}
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else
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{
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agg::conv_transform<arrow, agg::trans_affine> trans(arrow_, matrix);
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ras_ptr->add_path(trans);
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ren.color(agg::rgba8(r, g, b, a));
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agg::render_scanlines(*ras_ptr, sl, ren);
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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(markers_symbolizer const&,
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Feature const&,
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proj_transform const&);
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}
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