180 lines
7.6 KiB
C++
180 lines
7.6 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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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/marker_helpers.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/markers_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_scanline_aa.h"
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#include "agg_scanline_u.h"
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#include "agg_path_storage.h"
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#include "agg_conv_clip_polyline.h"
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#include "agg_conv_transform.h"
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// boost
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#include <boost/optional.hpp>
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namespace mapnik {
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template <typename T>
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void agg_renderer<T>::process(markers_symbolizer const& sym,
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mapnik::feature_impl & 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_transform<CoordTransform,clipped_geometry_type> path_type;
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typedef agg::conv_transform<path_type, agg::trans_affine> transformed_path_type;
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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_pre<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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ras_ptr->reset();
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ras_ptr->gamma(agg::gamma_power());
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agg::scanline_u8 sl;
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agg::rendering_buffer buf(current_buffer_->raw_data(), width_, height_, width_ * 4);
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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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agg::trans_affine geom_tr;
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evaluate_transform(geom_tr, feature, sym.get_transform());
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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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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)
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{
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if (!(*mark)->is_vector())
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{
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: markers_symbolizer does not yet support non-SVG markers";
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return;
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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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agg::trans_affine tr;
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setup_label_transform(tr, bbox, feature, sym);
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tr = agg::trans_affine_scaling(scale_factor_) * tr;
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coord2d center = bbox.center();
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agg::trans_affine_translation recenter(-center.x, -center.y);
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agg::trans_affine marker_trans = recenter * tr;
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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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agg::pod_bvector<path_attributes> attributes;
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bool result = push_explicit_style( (*marker)->attributes(), attributes, sym);
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svg_renderer<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer_type,
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agg::pixfmt_rgba32 > svg_renderer(svg_path, result ? attributes : (*marker)->attributes());
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BOOST_FOREACH( geometry_type & geom, feature.paths())
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{
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// TODO - merge this code with point_symbolizer rendering
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if (placement_method == MARKER_POINT_PLACEMENT || geom.num_points() <= 1)
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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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geom.label_interior_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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geom_tr.transform(&x,&y);
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agg::trans_affine matrix = marker_trans;
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matrix.translate(x,y);
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box2d<double> transformed_bbox = bbox * matrix;
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if (sym.get_allow_overlap() ||
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detector_->has_placement(transformed_bbox))
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{
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svg_renderer.render(*ras_ptr, sl, renb, matrix, sym.get_opacity(), bbox);
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if (/* DEBUG */ 0)
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{
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debug_draw_box(buf, transformed_bbox, 0, 0, 0.0);
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}
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if (!sym.get_ignore_placement())
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detector_->insert(transformed_bbox);
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}
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}
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else
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{
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clipped_geometry_type clipped(geom);
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clipped.clip_box(query_extent_.minx(),query_extent_.miny(),query_extent_.maxx(),query_extent_.maxy());
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path_type path(t_,clipped,prj_trans);
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transformed_path_type path_transformed(path,geom_tr);
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markers_placement<transformed_path_type, label_collision_detector4> placement(path_transformed, bbox, marker_trans, *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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agg::trans_affine matrix = marker_trans;
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matrix.rotate(angle);
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matrix.translate(x, y);
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svg_renderer.render(*ras_ptr, sl, renb, matrix, sym.get_opacity(), bbox);
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if (/* DEBUG */ 0)
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{
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debug_draw_box(buf, bbox*matrix, 0, 0, 0.0);
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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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}
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template void agg_renderer<image_32>::process(markers_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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