/usr/include/mapnik/grid/grid_marker_helpers.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2012 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
*
*****************************************************************************/
#ifndef MAPNIK_GRID_MARKER_HELPERS_HPP
#define MAPNIK_GRID_MARKER_HELPERS_HPP
// mapnik
#include <mapnik/markers_symbolizer.hpp>
#include <mapnik/markers_placement.hpp>
#include <mapnik/geometry.hpp>
#include <mapnik/geom_util.hpp>
// agg
#include "agg_renderer_scanline.h"
#include "agg_scanline_bin.h"
#include "agg_image_filters.h"
#include "agg_trans_bilinear.h"
#include "agg_span_allocator.h"
#include "agg_image_accessors.h"
#include "agg_span_image_filter_gray.h"
namespace mapnik {
template <typename BufferType, typename Rasterizer, typename PixFmt, typename RendererBase, typename RendererType, typename Detector, typename PixMapType>
struct raster_markers_rasterizer_dispatch_grid
{
typedef typename RendererBase::pixfmt_type pixfmt_type;
typedef typename RendererBase::pixfmt_type::color_type color_type;
raster_markers_rasterizer_dispatch_grid(BufferType & render_buffer,
Rasterizer & ras,
image_data_32 const& src,
agg::trans_affine const& marker_trans,
markers_symbolizer const& sym,
Detector & detector,
double scale_factor,
mapnik::feature_impl & feature,
PixMapType & pixmap)
: buf_(render_buffer),
pixf_(buf_),
renb_(pixf_),
ras_(ras),
src_(src),
marker_trans_(marker_trans),
sym_(sym),
detector_(detector),
scale_factor_(scale_factor),
feature_(feature),
pixmap_(pixmap),
placed_(false)
{
// TODO - support basic binary operators
//pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
}
template <typename T>
void add_path(T & path)
{
marker_placement_e placement_method = sym_.get_marker_placement();
box2d<double> bbox_(0,0, src_.width(),src_.height());
if (placement_method != MARKER_LINE_PLACEMENT ||
path.type() == Point)
{
double x = 0;
double y = 0;
if (path.type() == LineString)
{
if (!label::middle_point(path, x, y))
return;
}
else if (placement_method == MARKER_INTERIOR_PLACEMENT)
{
if (!label::interior_position(path, x, y))
return;
}
else
{
if (!label::centroid(path, x, y))
return;
}
agg::trans_affine matrix = marker_trans_;
matrix.translate(x,y);
box2d<double> transformed_bbox = bbox_ * matrix;
if (sym_.get_allow_overlap() ||
detector_.has_placement(transformed_bbox))
{
render_raster_marker(matrix);
if (!sym_.get_ignore_placement())
{
detector_.insert(transformed_bbox);
}
if (!placed_)
{
pixmap_.add_feature(feature_);
placed_ = true;
}
}
}
else
{
markers_placement<T, label_collision_detector4> placement(path, bbox_, marker_trans_, detector_,
sym_.get_spacing() * scale_factor_,
sym_.get_max_error(),
sym_.get_allow_overlap());
double x, y, angle;
while (placement.get_point(x, y, angle))
{
agg::trans_affine matrix = marker_trans_;
matrix.rotate(angle);
matrix.translate(x, y);
render_raster_marker(matrix);
if (!placed_)
{
pixmap_.add_feature(feature_);
placed_ = true;
}
}
}
}
void render_raster_marker(agg::trans_affine const& marker_tr)
{
double width = src_.width();
double height = src_.height();
double p[8];
p[0] = 0; p[1] = 0;
p[2] = width; p[3] = 0;
p[4] = width; p[5] = height;
p[6] = 0; p[7] = height;
marker_tr.transform(&p[0], &p[1]);
marker_tr.transform(&p[2], &p[3]);
marker_tr.transform(&p[4], &p[5]);
marker_tr.transform(&p[6], &p[7]);
ras_.move_to_d(p[0],p[1]);
ras_.line_to_d(p[2],p[3]);
ras_.line_to_d(p[4],p[5]);
ras_.line_to_d(p[6],p[7]);
RendererType ren(renb_);
ren.color(color_type(feature_.id()));
agg::render_scanlines(ras_, sl_, ren);
}
private:
agg::scanline_bin sl_;
BufferType & buf_;
PixFmt pixf_;
RendererBase renb_;
Rasterizer & ras_;
image_data_32 const& src_;
agg::trans_affine const& marker_trans_;
markers_symbolizer const& sym_;
Detector & detector_;
double scale_factor_;
mapnik::feature_impl & feature_;
PixMapType & pixmap_;
bool placed_;
};
template <typename BufferType, typename SvgRenderer, typename Rasterizer, typename Detector, typename PixMapType>
struct vector_markers_rasterizer_dispatch_grid
{
typedef typename SvgRenderer::renderer_base renderer_base;
typedef typename renderer_base::pixfmt_type pixfmt_type;
vector_markers_rasterizer_dispatch_grid(BufferType & render_buffer,
SvgRenderer & svg_renderer,
Rasterizer & ras,
box2d<double> const& bbox,
agg::trans_affine const& marker_trans,
markers_symbolizer const& sym,
Detector & detector,
double scale_factor,
mapnik::feature_impl & feature,
PixMapType & pixmap)
: buf_(render_buffer),
pixf_(buf_),
renb_(pixf_),
svg_renderer_(svg_renderer),
ras_(ras),
bbox_(bbox),
marker_trans_(marker_trans),
sym_(sym),
detector_(detector),
scale_factor_(scale_factor),
feature_(feature),
pixmap_(pixmap),
placed_(false)
{
// TODO
//pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
}
template <typename T>
void add_path(T & path)
{
marker_placement_e placement_method = sym_.get_marker_placement();
if (placement_method != MARKER_LINE_PLACEMENT ||
path.type() == Point)
{
double x = 0;
double y = 0;
if (path.type() == LineString)
{
if (!label::middle_point(path, x, y))
return;
}
else if (placement_method == MARKER_INTERIOR_PLACEMENT)
{
if (!label::interior_position(path, x, y))
return;
}
else
{
if (!label::centroid(path, x, y))
return;
}
agg::trans_affine matrix = marker_trans_;
matrix.translate(x,y);
box2d<double> transformed_bbox = bbox_ * matrix;
if (sym_.get_allow_overlap() ||
detector_.has_placement(transformed_bbox))
{
svg_renderer_.render_id(ras_, sl_, renb_, feature_.id(), matrix, sym_.get_opacity(), bbox_);
if (!sym_.get_ignore_placement())
{
detector_.insert(transformed_bbox);
}
if (!placed_)
{
pixmap_.add_feature(feature_);
placed_ = true;
}
}
}
else
{
markers_placement<T, Detector> placement(path, bbox_, marker_trans_, detector_,
sym_.get_spacing() * scale_factor_,
sym_.get_max_error(),
sym_.get_allow_overlap());
double x, y, angle;
while (placement.get_point(x, y, angle))
{
agg::trans_affine matrix = marker_trans_;
matrix.rotate(angle);
matrix.translate(x, y);
svg_renderer_.render_id(ras_, sl_, renb_, feature_.id(), matrix, sym_.get_opacity(), bbox_);
if (!placed_)
{
pixmap_.add_feature(feature_);
placed_ = true;
}
}
}
}
private:
agg::scanline_bin sl_;
BufferType & buf_;
pixfmt_type pixf_;
renderer_base renb_;
SvgRenderer & svg_renderer_;
Rasterizer & ras_;
box2d<double> const& bbox_;
agg::trans_affine const& marker_trans_;
markers_symbolizer const& sym_;
Detector & detector_;
double scale_factor_;
mapnik::feature_impl & feature_;
PixMapType & pixmap_;
bool placed_;
};
}
#endif
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