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+ supprt polygon smoothing in cairo backend

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This commit is contained in:
Artem Pavlenko 2012-03-14 17:38:27 +00:00
parent 3e4733c51a
commit f0bc1064c6
1 changed files with 25 additions and 10 deletions
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35
src/cairo_renderer.cpp
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@ -53,6 +53,7 @@
// agg // agg
#include "agg_conv_clip_polyline.h" #include "agg_conv_clip_polyline.h"
#include "agg_conv_clip_polygon.h" #include "agg_conv_clip_polygon.h"
#include "agg_conv_smooth_poly1.h"
// stl // stl
#ifdef MAPNIK_DEBUG #ifdef MAPNIK_DEBUG
@ -725,23 +726,37 @@ void cairo_renderer_base::start_map_processing(Map const& map)
proj_transform const& prj_trans) proj_transform const& prj_trans)
{ {
typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
cairo_context context(context_); cairo_context context(context_);
context.set_color(sym.get_fill(), sym.get_opacity()); context.set_color(sym.get_fill(), sym.get_opacity());
box2d<double> inflated_extent = query_extent_ * 1.1;
for (unsigned i = 0; i < feature->num_geometries(); ++i) for (unsigned i = 0; i < feature->num_geometries(); ++i)
{ {
geometry_type & geom = feature->get_geometry(i); geometry_type & geom = feature->get_geometry(i);
if (geom.num_points() > 2) if (geom.num_points() > 2)
{ {
clipped_geometry_type clipped(geom); if (sym.smooth() > 0.0)
clipped.clip_box(query_extent_.minx(),query_extent_.miny(),query_extent_.maxx(),query_extent_.maxy()); {
path_type path(t_,clipped,prj_trans); typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
context.add_path(path); typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
context.fill(); typedef agg::conv_smooth_poly1_curve<path_type> smooth_type;
clipped_geometry_type clipped(geom);
clipped.clip_box(inflated_extent.minx(),inflated_extent.miny(),inflated_extent.maxx(),inflated_extent.maxy());
path_type path(t_,clipped,prj_trans);
smooth_type smooth(path);
smooth.smooth_value(sym.smooth());
context.add_agg_path(smooth);
context.fill();
}
else
{
typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
clipped_geometry_type clipped(geom);
clipped.clip_box(query_extent_.minx(),query_extent_.miny(),query_extent_.maxx(),query_extent_.maxy());
path_type path(t_,clipped,prj_trans);
context.add_path(path);
context.fill();
}
} }
} }
} }