static boost::python::tuple
getinitargs(const line_pattern_symbolizer& l)
{
boost::shared_ptr<mapnik::ImageData32> img = l.get_image();
const std::string & filename = l.get_filename();
return boost::python::make_tuple(filename,mapnik::guess_type(filename),img->width(),img->height());
}
void operator () (line_pattern_symbolizer const& sym)
{
path_expression_ptr const& filename_expr = sym.get_filename();
if (filename_expr)
{
path_processor_type::collect_attributes(*filename_expr,names_);
}
collect_transform(sym.get_image_transform());
collect_transform(sym.get_transform());
}
static boost::python::tuple
getinitargs(const line_pattern_symbolizer& l)
{
std::string filename = path_processor_type::to_string(*l.get_filename());
// FIXME : Do we need "type" parameter at all ?
return boost::python::make_tuple(filename, guess_type(filename));
}
void agg_renderer<T>::process(line_pattern_symbolizer const& sym,
Feature const& feature,
proj_transform const& prj_trans)
{
typedef coord_transform2<CoordTransform,geometry_type> path_type;
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<agg::pixfmt_rgba32_plain> renderer_base;
typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32_plain pixf(buf);
std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
if (!mark || !(*mark)->is_bitmap()) return;
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat));
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
ren.clip_box(0,0,width_,height_);
rasterizer_type ras(ren);
metawriter_with_properties writer = sym.get_metawriter();
for (unsigned i=0;i<feature.num_geometries();++i)
{
geometry_type const& geom = feature.get_geometry(i);
if (geom.num_points() > 1)
{
path_type path(t_,geom,prj_trans);
ras.add_path(path);
if (writer.first) writer.first->add_line(path, feature, t_, writer.second);
}
}
}
void agg_renderer<T>::process(line_pattern_symbolizer const& sym,
mapnik::feature_ptr const& feature,
proj_transform const& prj_trans)
{
typedef agg::conv_clip_polyline<geometry_type> clipped_geometry_type;
typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<agg::pixfmt_rgba32_plain> renderer_base;
typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
agg::pixfmt_rgba32_plain pixf(buf);
std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
if (!mark) return;
if (!(*mark)->is_bitmap())
{
std::clog << "### Warning only images (not '" << filename << "') are supported in the line_pattern_symbolizer\n";
return;
}
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
box2d<double> ext = query_extent_ * 1.1;
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat));
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
// TODO - should be sensitive to buffer size
ren.clip_box(0,0,width_,height_);
rasterizer_type ras(ren);
//metawriter_with_properties writer = sym.get_metawriter();
for (unsigned i=0;i<feature->num_geometries();++i)
{
geometry_type & geom = feature->get_geometry(i);
if (geom.num_points() > 1)
{
clipped_geometry_type clipped(geom);
clipped.clip_box(ext.minx(),ext.miny(),ext.maxx(),ext.maxy());
path_type path(t_,clipped,prj_trans);
ras.add_path(path);
//if (writer.first) writer.first->add_line(path, *feature, t_, writer.second);
}
}
}
void grid_renderer<T>::process(line_pattern_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
boost::optional<marker_ptr> mark = marker_cache::instance().find(filename,true);
if (!mark) return;
if (!(*mark)->is_bitmap())
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
return;
}
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
typedef boost::mpl::vector<clip_line_tag, transform_tag,
offset_transform_tag, affine_transform_tag,
simplify_tag, smooth_tag, stroke_tag> conv_types;
agg::scanline_bin sl;
grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
pixfmt_type pixf(buf);
grid_renderer_base_type renb(pixf);
renderer_type ren(renb);
ras_ptr->reset();
int stroke_width = (*pat)->width();
agg::trans_affine tr;
evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);
box2d<double> clipping_extent = query_extent_;
if (sym.clip())
{
double padding = (double)(query_extent_.width()/pixmap_.width());
double half_stroke = stroke_width/2.0;
if (half_stroke > 1)
padding *= half_stroke;
if (std::fabs(sym.offset()) > 0)
padding *= std::fabs(sym.offset()) * 1.2;
padding *= scale_factor_;
clipping_extent.pad(padding);
}
// to avoid the complexity of using an agg pattern filter instead
// we create a line_symbolizer in order to fake the pattern
stroke str;
str.set_width(stroke_width);
line_symbolizer line(str);
vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
CoordTransform, proj_transform, agg::trans_affine, conv_types>
converter(clipping_extent,*ras_ptr,line,t_,prj_trans,tr,scale_factor_);
if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
converter.set<transform_tag>(); // always transform
if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
converter.set<affine_transform_tag>(); // optional affine transform
if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
converter.set<stroke_tag>(); //always stroke
for (geometry_type & geom : feature.paths())
{
if (geom.size() > 1)
{
converter.apply(geom);
}
}
// render id
ren.color(color_type(feature.id()));
agg::render_scanlines(*ras_ptr, sl, ren);
// add feature properties to grid cache
pixmap_.add_feature(feature);
}
