227 lines
8.7 KiB
C++
227 lines
8.7 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) 2014 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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#if defined(GRID_RENDERER)
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/*
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porting notes -->
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- rasterizer -> grid_rasterizer
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- current_buffer_ -> pixmap_
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- agg::rendering_buffer -> grid_renderering_buffer
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- no gamma
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- agg::scanline_bin sl
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- grid_rendering_buffer
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- agg::renderer_scanline_bin_solid
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- TODO - clamp sizes to > 4 pixels of interactivity
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- svg_renderer.render_id
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- only encode feature if placements are found:
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if (placed)
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{
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pixmap_.add_feature(feature);
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}
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*/
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/geom_util.hpp>
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#include <mapnik/marker_helpers.hpp>
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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_renderer_base.hpp>
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#include <mapnik/grid/grid_render_marker.hpp>
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#include <mapnik/grid/grid.hpp>
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#include <mapnik/debug.hpp>
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#include <mapnik/geom_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_agg.hpp>
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#include <mapnik/svg/svg_storage.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/svg/svg_path_attributes.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/renderer_common/process_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_rasterizer_scanline_aa.h"
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// boost
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#include <boost/optional.hpp>
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// stl
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#include <algorithm>
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#include <tuple>
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namespace mapnik {
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namespace detail {
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template <typename SvgRenderer, typename Detector, typename RendererContext>
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struct vector_markers_rasterizer_dispatch : public vector_markers_dispatch<Detector>
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{
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using renderer_base = typename SvgRenderer::renderer_base;
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using vertex_source_type = typename SvgRenderer::vertex_source_type;
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using attribute_source_type = typename SvgRenderer::attribute_source_type;
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using pixfmt_type = typename renderer_base::pixfmt_type;
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using BufferType = typename std::tuple_element<0,RendererContext>::type;
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using RasterizerType = typename std::tuple_element<1,RendererContext>::type;
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using PixMapType = typename std::tuple_element<2,RendererContext>::type;
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vector_markers_rasterizer_dispatch(svg_path_ptr const& src,
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vertex_source_type & path,
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svg_attribute_type const& attrs,
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agg::trans_affine const& marker_trans,
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markers_symbolizer const& sym,
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Detector & detector,
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double scale_factor,
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mapnik::feature_impl & feature,
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attributes const& vars,
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bool snap_to_pixels,
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RendererContext const& renderer_context)
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: vector_markers_dispatch<Detector>(src, marker_trans, sym, detector, scale_factor, feature, vars),
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buf_(std::get<0>(renderer_context)),
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pixf_(buf_),
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renb_(pixf_),
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svg_renderer_(path, attrs),
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ras_(std::get<1>(renderer_context)),
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pixmap_(std::get<2>(renderer_context)),
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placed_(false)
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{}
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void render_marker(agg::trans_affine const& marker_tr, double opacity)
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{
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agg::scanline_bin sl_;
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svg_renderer_.render_id(ras_, sl_, renb_, this->feature_.id(), marker_tr, opacity, this->src_->bounding_box());
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if (!placed_)
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{
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pixmap_.add_feature(this->feature_);
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placed_ = true;
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}
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}
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private:
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BufferType & buf_;
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pixfmt_type pixf_;
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renderer_base renb_;
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SvgRenderer svg_renderer_;
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RasterizerType & ras_;
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PixMapType & pixmap_;
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bool placed_;
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};
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template <typename RendererBase, typename RendererType, typename Detector, typename RendererContext>
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struct raster_markers_rasterizer_dispatch : public raster_markers_dispatch<Detector>
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{
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using pixfmt_type = typename RendererBase::pixfmt_type;
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using color_type = typename RendererBase::pixfmt_type::color_type;
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using BufferType = typename std::tuple_element<0,RendererContext>::type;
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using RasterizerType = typename std::tuple_element<1,RendererContext>::type;
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using PixMapType = typename std::tuple_element<2,RendererContext>::type;
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raster_markers_rasterizer_dispatch(image_rgba8 const& src,
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agg::trans_affine const& marker_trans,
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markers_symbolizer const& sym,
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Detector & detector,
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double scale_factor,
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mapnik::feature_impl & feature,
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attributes const& vars,
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RendererContext const& renderer_context)
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: raster_markers_dispatch<Detector>(src, marker_trans, sym, detector, scale_factor, feature, vars),
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buf_(std::get<0>(renderer_context)),
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pixf_(buf_),
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renb_(pixf_),
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ras_(std::get<1>(renderer_context)),
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pixmap_(std::get<2>(renderer_context)),
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placed_(false)
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{}
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void render_marker(agg::trans_affine const& marker_tr, double opacity)
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{
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// In the long term this should be a visitor pattern based on the type of render this->src_ provided that converts
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// the destination pixel type required.
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render_raster_marker(RendererType(renb_), ras_, this->src_, this->feature_, marker_tr, opacity);
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if (!placed_)
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{
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pixmap_.add_feature(this->feature_);
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placed_ = true;
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}
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}
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private:
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BufferType & buf_;
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pixfmt_type pixf_;
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RendererBase renb_;
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RasterizerType & ras_;
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PixMapType & pixmap_;
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bool placed_;
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};
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}
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template <typename T>
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void grid_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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using buf_type = grid_rendering_buffer;
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using pixfmt_type = typename grid_renderer_base_type::pixfmt_type;
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using renderer_type = agg::renderer_scanline_bin_solid<grid_renderer_base_type>;
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using detector_type = label_collision_detector4;
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using namespace mapnik::svg;
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using svg_attribute_type = agg::pod_bvector<path_attributes>;
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using svg_renderer_type = svg_renderer_agg<svg_path_adapter,
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svg_attribute_type,
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renderer_type,
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pixfmt_type>;
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buf_type render_buf(pixmap_.raw_data(), common_.width_, common_.height_, common_.width_);
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ras_ptr->reset();
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box2d<double> clip_box = common_.query_extent_;
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auto renderer_context = std::tie(render_buf,*ras_ptr,pixmap_);
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using context_type = decltype(renderer_context);
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using vector_dispatch_type = detail::vector_markers_rasterizer_dispatch<svg_renderer_type,
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detector_type,
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context_type>;
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using raster_dispatch_type = detail::raster_markers_rasterizer_dispatch<grid_renderer_base_type,
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renderer_type,
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detector_type,
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context_type>;
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render_markers_symbolizer<vector_dispatch_type, raster_dispatch_type>(
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sym, feature, prj_trans, common_, clip_box,renderer_context);
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}
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template void grid_renderer<grid>::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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#endif
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