d64b86dcdf
All the grid visual tests pass. One small issue is that in the grid line pattern symbolizer it constructs a 'fake' line symbolizer to re-use code (as the grid renderer cares nothing for patterns), but doesn't pass the offset parameter to it. The tests currently require this behaviour, but they should probably be changed as it seems incorrect.
128 lines
4.7 KiB
C++
128 lines
4.7 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) 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/feature.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.hpp>
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#include <mapnik/vertex_converters.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_conv_stroke.h"
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#include "agg_conv_dash.h"
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// boost
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// stl
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#include <string>
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namespace mapnik {
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template <typename T>
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void grid_renderer<T>::process(line_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 typename grid_renderer_base_type::pixfmt_type pixfmt_type;
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typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
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typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
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typedef boost::mpl::vector<clip_line_tag, transform_tag,
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offset_transform_tag, affine_transform_tag,
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simplify_tag, smooth_tag, dash_tag, stroke_tag> conv_types;
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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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pixfmt_type pixf(buf);
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grid_renderer_base_type renb(pixf);
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renderer_type ren(renb);
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ras_ptr->reset();
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agg::trans_affine tr;
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auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
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if (transform) { evaluate_transform(tr, feature, *transform); }
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box2d<double> clipping_extent = query_extent_;
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bool clip = get<value_bool>(sym, keys::clip, feature, true);
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double width = get<value_double>(sym, keys::stroke_width, feature, 1.0);
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double offset = get<value_double>(sym, keys::offset, feature, 0.0);
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double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, 0.0);
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double smooth = get<value_double>(sym, keys::smooth, feature, false);
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bool has_dash = has_key<dash_array>(sym, keys::stroke_dasharray);
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if (clip)
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{
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double padding = (double)(query_extent_.width()/pixmap_.width());
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double half_stroke = width/2.0;
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if (half_stroke > 1)
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padding *= half_stroke;
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if (std::fabs(offset) > 0)
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padding *= std::fabs(offset) * 1.2;
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padding *= scale_factor_;
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clipping_extent.pad(padding);
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}
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vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types>
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converter(clipping_extent,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);
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if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
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converter.set<transform_tag>(); // always transform
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if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
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converter.set<affine_transform_tag>(); // optional affine transform
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if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
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if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
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if (has_dash) converter.set<dash_tag>();
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converter.set<stroke_tag>(); //always stroke
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for ( geometry_type & geom : feature.paths())
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{
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if (geom.size() > 1)
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{
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converter.apply(geom);
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}
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}
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// render id
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ren.color(color_type(feature.id()));
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ras_ptr->filling_rule(agg::fill_non_zero);
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agg::render_scanlines(*ras_ptr, sl, ren);
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// add feature properties to grid cache
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pixmap_.add_feature(feature);
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}
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template void grid_renderer<grid>::process(line_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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