271 lines
10 KiB
C++
271 lines
10 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) 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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// mapnik
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#include <mapnik/grid/grid_rasterizer.hpp>
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#include <mapnik/grid/grid_renderer.hpp>
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#include <mapnik/grid/grid_pixfmt.hpp>
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#include <mapnik/grid/grid_pixel.hpp>
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#include <mapnik/grid/grid.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/svg/svg_renderer.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/markers_placement.hpp>
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#include <mapnik/arrow.hpp>
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// agg
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_renderer_scanline.h"
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#include "agg_scanline_bin.h"
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#include "agg_path_storage.h"
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#include "agg_ellipse.h"
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#include "agg_conv_stroke.h"
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// stl
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#include <algorithm>
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namespace mapnik {
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template <typename T>
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void grid_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,geometry_type> path_type;
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typedef agg::renderer_base<mapnik::pixfmt_gray16> ren_base;
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typedef agg::renderer_scanline_bin_solid<ren_base> renderer;
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agg::scanline_bin sl;
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grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
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mapnik::pixfmt_gray16 pixf(buf);
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ren_base renb(pixf);
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renderer ren(renb);
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ras_ptr->reset();
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agg::trans_affine tr;
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boost::array<double,6> const& m = sym.get_transform();
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tr.load_from(&m[0]);
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tr = agg::trans_affine_scaling(scale_factor_*(1.0/pixmap_.get_resolution())) * tr;
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std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);
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marker_placement_e placement_method = sym.get_marker_placement();
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marker_type_e marker_type = sym.get_marker_type();
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if (!filename.empty())
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{
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boost::optional<marker_ptr> mark = mapnik::marker_cache::instance()->find(filename, true);
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if (mark && *mark && (*mark)->is_vector())
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{
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boost::optional<path_ptr> marker = (*mark)->get_vector_data();
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box2d<double> const& bbox = (*marker)->bounding_box();
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double x1 = bbox.minx();
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double y1 = bbox.miny();
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double x2 = bbox.maxx();
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double y2 = bbox.maxy();
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agg::trans_affine recenter = agg::trans_affine_translation(-0.5*(x1+x2),-0.5*(y1+y2));
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tr.transform(&x1,&y1);
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tr.transform(&x2,&y2);
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box2d<double> extent(x1,y1,x2,y2);
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using namespace mapnik::svg;
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vertex_stl_adapter<svg_path_storage> stl_storage((*marker)->source());
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svg_path_adapter svg_path(stl_storage);
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svg_renderer<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer,
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mapnik::pixfmt_gray16 > svg_renderer(svg_path,(*marker)->attributes());
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bool placed = false;
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for (unsigned i=0; i<feature.num_geometries(); ++i)
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{
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geometry_type const& geom = feature.get_geometry(i);
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if (geom.num_points() <= 1)
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{
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std::clog << "### Warning svg markers not supported yet for points within markers_symbolizer\n";
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continue;
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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() * scale_factor_,
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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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placed = true;
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agg::trans_affine matrix = recenter * tr *agg::trans_affine_rotation(angle) * agg::trans_affine_translation(x, y);
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svg_renderer.render_id(*ras_ptr, sl, renb, feature.id(), matrix, sym.get_opacity(),bbox);
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}
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}
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if (placed)
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pixmap_.add_feature(feature);
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}
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}
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else
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{
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stroke const& stroke_ = sym.get_stroke();
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double strk_width = stroke_.get_width();
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double w;
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double h;
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unsigned int res = pixmap_.get_resolution();
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if (res != 1) {
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// clamp to at least 4 px otherwise interactive pixels can be too small
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double min = static_cast<double>(4/pixmap_.get_resolution());
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w = std::max(sym.get_width()/res,min);
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h = std::max(sym.get_height()/res,min);
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} else {
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w = sym.get_width()/res;
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h = sym.get_height()/res;
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}
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arrow arrow_;
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box2d<double> extent;
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double dx = w + (2*strk_width);
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double dy = h + (2*strk_width);
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if (marker_type == ARROW)
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{
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extent = arrow_.extent();
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double x1 = extent.minx();
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double y1 = extent.miny();
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double x2 = extent.maxx();
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double y2 = extent.maxy();
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tr.transform(&x1,&y1);
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tr.transform(&x2,&y2);
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extent.init(x1,y1,x2,y2);
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}
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else
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{
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double x1 = -1 *(dx);
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double y1 = -1 *(dy);
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double x2 = dx;
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double y2 = dy;
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tr.transform(&x1,&y1);
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tr.transform(&x2,&y2);
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extent.init(x1,y1,x2,y2);
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}
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double x;
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double y;
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double z=0;
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for (unsigned i=0; i<feature.num_geometries(); ++i)
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{
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geometry_type const& geom = feature.get_geometry(i);
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if (placement_method == MARKER_POINT_PLACEMENT || geom.num_points() <= 1)
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{
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geom.label_position(&x,&y);
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prj_trans.backward(x,y,z);
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t_.forward(&x,&y);
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int px = int(floor(x - 0.5 * dx));
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int py = int(floor(y - 0.5 * dy));
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box2d<double> label_ext (px, py, px + dx +1, py + dy +1);
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if (sym.get_allow_overlap() ||
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detector_.has_placement(label_ext))
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{
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agg::ellipse c(x, y, w, h);
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agg::path_storage marker;
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marker.concat_path(c);
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ras_ptr->add_path(marker);
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// outline
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if (strk_width)
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{
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agg::conv_stroke<agg::path_storage> outline(marker);
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outline.generator().width(strk_width * scale_factor_);
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ras_ptr->add_path(outline);
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}
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detector_.insert(label_ext);
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}
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}
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else
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{
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agg::path_storage marker;
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if (marker_type == ARROW)
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marker.concat_path(arrow_);
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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() * scale_factor_,
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sym.get_max_error(),
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sym.get_allow_overlap());
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double x_t, y_t, angle;
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while (placement.get_point(&x_t, &y_t, &angle))
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{
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agg::trans_affine matrix;
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if (marker_type == ELLIPSE)
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{
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// todo proper bbox - this is buggy
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agg::ellipse c(x_t, y_t, w, h);
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marker.concat_path(c);
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agg::trans_affine matrix;
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matrix *= agg::trans_affine_translation(-x_t,-y_t);
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matrix *= agg::trans_affine_rotation(angle);
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matrix *= agg::trans_affine_translation(x_t,y_t);
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marker.transform(matrix);
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}
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else
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{
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matrix = tr * agg::trans_affine_rotation(angle) * agg::trans_affine_translation(x_t, y_t);
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}
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agg::conv_transform<agg::path_storage, agg::trans_affine> trans(marker, matrix);
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// fill
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ras_ptr->add_path(trans);
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// outline
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if (strk_width)
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{
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agg::conv_stroke<agg::conv_transform<agg::path_storage, agg::trans_affine> > outline(trans);
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outline.generator().width(strk_width * scale_factor_);
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ras_ptr->add_path(outline);
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}
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}
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}
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}
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ren.color(mapnik::gray16(feature.id()));
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agg::render_scanlines(*ras_ptr, sl, ren);
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pixmap_.add_feature(feature);
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}
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}
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template void grid_renderer<grid>::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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