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Grid renderer implementation for group symbolizer.

Browse source 
This uses common process_group_symbolizer for most of the work.
Add reference grids for visual tests.
This commit is contained in:
Jordan Hollinger 2014-02-14 00:13:32 -05:00 committed by Jordan Hollinger
parent f81d5abe1f
commit bbd2cfd40f
7 changed files with 680 additions and 0 deletions
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3
include/mapnik/grid/grid_renderer.hpp
View file

@ -108,6 +108,9 @@ public:
void process(markers_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans);
void process(group_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans);
inline bool process(rule::symbolizers const& /*syms*/,
mapnik::feature_impl & /*feature*/,
proj_transform const& /*prj_trans*/)

1
src/build.py
View file

@ -331,6 +331,7 @@ if env['GRID_RENDERER']:
grid/process_raster_symbolizer.cpp
grid/process_shield_symbolizer.cpp
grid/process_text_symbolizer.cpp
grid/process_group_symbolizer.cpp
""")
lib_env.Append(CPPDEFINES = '-DGRID_RENDERER')
libmapnik_defines.append('-DGRID_RENDERER')

126
src/grid/process_group_symbolizer.cpp Normal file
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@ -0,0 +1,126 @@
/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2013 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
// mapnik
#include <mapnik/feature.hpp>
#include <mapnik/grid/grid_rasterizer.hpp>
#include <mapnik/grid/grid_renderer.hpp>
#include <mapnik/grid/grid_renderer_base.hpp>
#include <mapnik/grid/grid.hpp>
#include <mapnik/attribute_collector.hpp>
#include <mapnik/text/placement_finder.hpp>
#include <mapnik/text/symbolizer_helpers.hpp>
#include <mapnik/text/renderer.hpp>
#include <mapnik/group/group_layout_manager.hpp>
#include <mapnik/group/group_symbolizer_helper.hpp>
#include <mapnik/geom_util.hpp>
#include <mapnik/pixel_position.hpp>
#include <mapnik/label_collision_detector.hpp>
#include <mapnik/geom_util.hpp>
#include <mapnik/renderer_common/process_point_symbolizer.hpp>
#include <mapnik/renderer_common/process_group_symbolizer.hpp>
// agg
#include "agg_trans_affine.h"
namespace mapnik {
/**
* Render a thunk which was frozen from a previous call to
* extract_bboxes. We should now have a new offset at which
* to render it, and the boxes themselves should already be
* in the detector from the placement_finder.
*/
template <typename T0>
struct thunk_renderer : public boost::static_visitor<>
{
typedef grid_renderer<T0> renderer_type;
typedef typename renderer_type::buffer_type buffer_type;
typedef grid_text_renderer<buffer_type> text_renderer_type;
thunk_renderer(renderer_type &ren,
buffer_type &pixmap,
renderer_common &common,
feature_impl &feature,
pixel_position const &offset)
: ren_(ren), pixmap_(pixmap), common_(common),
feature_(feature), offset_(offset)
{}
void operator()(point_render_thunk const &thunk) const
{
ren_.render_marker(feature_, pixmap_.get_resolution(), offset_ + thunk.pos_,
*thunk.marker_, thunk.tr_, thunk.opacity_, thunk.comp_op_);
}
void operator()(text_render_thunk const &thunk) const
{
text_renderer_type ren(pixmap_, thunk.comp_op_, common_.scale_factor_);
value_integer feature_id = feature_.id();
render_offset_placements(
thunk.placements_,
offset_,
[&] (glyph_positions_ptr glyphs) {
ren.render(*glyphs, feature_id);
});
}
template <typename T1>
void operator()(T1 const &) const
{
// TODO: warning if unimplemented?
}
private:
renderer_type &ren_;
buffer_type &pixmap_;
renderer_common &common_;
feature_impl &feature_;
pixel_position offset_;
};
template <typename T>
void grid_renderer<T>::process(group_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
render_group_symbolizer(
sym, feature, prj_trans, common_.query_extent_, common_,
[&](render_thunk_list const& thunks, pixel_position const& render_offset)
{
thunk_renderer<T> ren(*this, pixmap_, common_, feature, render_offset);
for (render_thunk_ptr const& thunk : thunks)
{
boost::apply_visitor(ren, *thunk);
}
});
}
template void grid_renderer<grid>::process(group_symbolizer const&,
mapnik::feature_impl &,
proj_transform const&);
}

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tests/visual_tests/grids/group-symbolizer-1-512-512-1.0-grid-reference.json Normal file
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@ -0,0 +1,137 @@
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tests/visual_tests/grids/group-symbolizer-2-512-512-1.0-grid-reference.json Normal file
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tests/visual_tests/grids/group-symbolizer-line-1-512-512-1.0-grid-reference.json Normal file
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tests/visual_tests/grids/group-symbolizer-line-2-512-512-1.0-grid-reference.json Normal file
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@ -0,0 +1,138 @@
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