204 lines
8.8 KiB
C++
204 lines
8.8 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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#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 "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(shield_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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UnicodeString text;
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if( sym.get_no_text() )
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text = UnicodeString( " " ); // TODO: fix->use 'space' as the text to render
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else
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{
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expression_ptr name_expr = sym.get_name();
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if (!name_expr) return;
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value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr);
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text = result.to_unicode();
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}
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if ( sym.get_text_convert() == TOUPPER)
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{
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text = text.toUpper();
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}
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else if ( sym.get_text_convert() == TOLOWER)
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{
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text = text.toLower();
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}
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std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
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boost::optional<mapnik::image_ptr> data = mapnik::image_cache::instance()->find(filename,true);
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if (text.length() > 0 && data)
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{
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face_set_ptr faces;
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if (sym.get_fontset().size() > 0)
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{
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faces = font_manager_.get_face_set(sym.get_fontset());
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}
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else
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{
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faces = font_manager_.get_face_set(sym.get_face_name());
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}
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if (faces->size() > 0)
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{
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text_renderer<T> ren(pixmap_, faces);
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ren.set_pixel_size(sym.get_text_size());
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ren.set_fill(sym.get_fill());
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ren.set_halo_fill(sym.get_halo_fill());
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ren.set_halo_radius(sym.get_halo_radius());
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placement_finder<label_collision_detector4> finder(detector_);
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string_info info(text);
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faces->get_string_info(info);
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int w = (*data)->width();
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int h = (*data)->height();
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unsigned num_geom = feature.num_geometries();
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for (unsigned i=0;i<num_geom;++i)
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{
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geometry2d const& geom = feature.get_geometry(i);
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if (geom.num_points() > 0 )
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{
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path_type path(t_,geom,prj_trans);
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label_placement_enum how_placed = sym.get_label_placement();
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if (how_placed == POINT_PLACEMENT || how_placed == VERTEX_PLACEMENT)
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{
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// for every vertex, try and place a shield/text
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geom.rewind(0);
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for( unsigned jj = 0; jj < geom.num_points(); jj++ )
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{
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double label_x;
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double label_y;
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double z=0.0;
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placement text_placement(info, sym, w, h, false);
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text_placement.avoid_edges = sym.get_avoid_edges();
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text_placement.allow_overlap = sym.get_allow_overlap();
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if( how_placed == VERTEX_PLACEMENT )
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geom.vertex(&label_x,&label_y); // by vertex
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else
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geom.label_position(&label_x, &label_y); // by middle of line or by point
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prj_trans.backward(label_x,label_y, z);
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t_.forward(&label_x,&label_y);
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finder.find_point_placement( text_placement,label_x,label_y,0.0,sym.get_vertical_alignment(),sym.get_line_spacing(),
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sym.get_character_spacing(),sym.get_horizontal_alignment(),sym.get_justify_alignment() );
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// check to see if image overlaps anything too, there is only ever 1 placement found for points and verticies
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if( text_placement.placements.size() > 0)
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{
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double x = text_placement.placements[0].starting_x;
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double y = text_placement.placements[0].starting_y;
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int px;
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int py;
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box2d<double> label_ext;
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if( !sym.get_unlock_image() )
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{ // center image at text center position
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// remove displacement from image label
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position pos = sym.get_displacement();
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double lx = x - boost::get<0>(pos);
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double ly = y - boost::get<1>(pos);
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px=int(floor(lx - (0.5 * w))) ;
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py=int(floor(ly - (0.5 * h))) ;
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label_ext.init( floor(lx - 0.5 * w), floor(ly - 0.5 * h), ceil (lx + 0.5 * w), ceil (ly + 0.5 * h) );
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}
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else
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{ // center image at reference location
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px=int(floor(label_x - 0.5 * w));
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py=int(floor(label_y - 0.5 * h));
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label_ext.init( floor(label_x - 0.5 * w), floor(label_y - 0.5 * h), ceil (label_x + 0.5 * w), ceil (label_y + 0.5 * h));
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}
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if ( sym.get_allow_overlap() || detector_.has_placement(label_ext) )
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{
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//pixmap_.set_rectangle_alpha(px,py,*data);
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pixmap_.set_rectangle_alpha2(*(*data),px,py,float(sym.get_opacity()));
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box2d<double> dim = ren.prepare_glyphs(&text_placement.placements[0]);
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ren.render(x,y);
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detector_.insert(label_ext);
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finder.update_detector(text_placement);
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}
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}
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}
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}
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else if (geom.num_points() > 1 && sym.get_label_placement() == LINE_PLACEMENT)
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{
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placement text_placement(info, sym, w, h, true);
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text_placement.avoid_edges = sym.get_avoid_edges();
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finder.find_point_placements<path_type>(text_placement,path);
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for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ ii)
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{
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double x = text_placement.placements[ii].starting_x;
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double y = text_placement.placements[ii].starting_y;
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int px=int(x - (w/2));
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int py=int(y - (h/2));
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pixmap_.set_rectangle_alpha(px,py,*(*data));
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box2d<double> dim = ren.prepare_glyphs(&text_placement.placements[ii]);
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ren.render(x,y);
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}
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finder.update_detector(text_placement);
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}
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}
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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(shield_symbolizer const&,
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Feature const&,
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proj_transform const&);
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}
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