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+ shield_symbolizer: support SVG images rendering

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TODO: This is a first take, proper refactoring required!!!
This commit is contained in:
Artem Pavlenko 2010-06-03 12:35:51 +00:00
parent 5e43fefdba
commit bc5730f006
1 changed files with 258 additions and 108 deletions
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152
src/agg/process_shield_symbolizer.cpp
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@ -42,6 +42,9 @@ void agg_renderer<T>::process(shield_symbolizer const& sym,
proj_transform const& prj_trans)
{
typedef coord_transform2<CoordTransform,geometry2d> path_type;
typedef agg::pixfmt_rgba32 pixfmt;
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
UnicodeString text;
if( sym.get_no_text() )
@ -64,7 +67,153 @@ void agg_renderer<T>::process(shield_symbolizer const& sym,
}
std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
boost::optional<mapnik::image_ptr> data = mapnik::image_cache::instance()->find(filename,true);
if (is_svg(filename)) //SVG Label
{
boost::optional<path_ptr> marker = marker_cache::instance()->find(filename, true);
ras_ptr->reset();
ras_ptr->gamma(agg::gamma_linear());
agg::scanline_u8 sl;
agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
pixfmt pixf(buf);
renderer_base renb(pixf);
renderer_solid ren(renb);
if (text.length() > 0 && marker && *marker)
{
face_set_ptr faces;
double x1, y1, x2, y2;
(*marker)->bounding_rect(&x1, &y1, &x2, &y2);
// TODO : apply transform
int w = int(x2 - x1);
int h = int(y2 - y1);
if (sym.get_fontset().size() > 0)
{
faces = font_manager_.get_face_set(sym.get_fontset());
}
else
{
faces = font_manager_.get_face_set(sym.get_face_name());
}
if (faces->size() > 0)
{
text_renderer<T> text_ren(pixmap_, faces);
text_ren.set_pixel_size(sym.get_text_size());
text_ren.set_fill(sym.get_fill());
text_ren.set_halo_fill(sym.get_halo_fill());
text_ren.set_halo_radius(sym.get_halo_radius());
placement_finder<label_collision_detector4> finder(detector_);
string_info info(text);
faces->get_string_info(info);
unsigned num_geom = feature.num_geometries();
for (unsigned i=0;i<num_geom;++i)
{
geometry2d const& geom = feature.get_geometry(i);
if (geom.num_points() > 0 )
{
path_type path(t_,geom,prj_trans);
label_placement_enum how_placed = sym.get_label_placement();
if (how_placed == POINT_PLACEMENT || how_placed == VERTEX_PLACEMENT)
{
// for every vertex, try and place a shield/text
geom.rewind(0);
for( unsigned jj = 0; jj < geom.num_points(); jj++ )
{
double label_x;
double label_y;
double z=0.0;
placement text_placement(info, sym, w, h, false);
text_placement.avoid_edges = sym.get_avoid_edges();
text_placement.allow_overlap = sym.get_allow_overlap();
if( how_placed == VERTEX_PLACEMENT )
geom.vertex(&label_x,&label_y); // by vertex
else
geom.label_position(&label_x, &label_y); // by middle of line or by point
prj_trans.backward(label_x,label_y, z);
t_.forward(&label_x,&label_y);
finder.find_point_placement( text_placement,label_x,label_y,0.0,sym.get_vertical_alignment(),sym.get_line_spacing(),
sym.get_character_spacing(),sym.get_horizontal_alignment(),sym.get_justify_alignment() );
// check to see if image overlaps anything too, there is only ever 1 placement found for points and verticies
if( text_placement.placements.size() > 0)
{
double x = text_placement.placements[0].starting_x;
double y = text_placement.placements[0].starting_y;
int px;
int py;
box2d<double> label_ext;
if( !sym.get_unlock_image() )
{ // center image at text center position
// remove displacement from image label
position pos = sym.get_displacement();
double lx = x - boost::get<0>(pos);
double ly = y - boost::get<1>(pos);
px=int(floor(lx - (0.5 * w))) ;
py=int(floor(ly - (0.5 * h))) ;
label_ext.init( floor(lx - 0.5 * w), floor(ly - 0.5 * h),
ceil (lx + 0.5 * w), ceil (ly + 0.5 * h) );
}
else
{ // center image at reference location
px=int(floor(label_x - 0.5 * w));
py=int(floor(label_y - 0.5 * h));
label_ext.init( floor(label_x - 0.5 * w), floor(label_y - 0.5 * h),
ceil (label_x + 0.5 * w), ceil (label_y + 0.5 * h));
}
if ( sym.get_allow_overlap() || detector_.has_placement(label_ext) )
{
agg::trans_affine matrix = agg::trans_affine_translation(px, py);
(*marker)->render(*ras_ptr, sl, ren, matrix, renb.clip_box(), sym.get_opacity());
box2d<double> dim = text_ren.prepare_glyphs(&text_placement.placements[0]);
text_ren.render(x,y);
detector_.insert(label_ext);
finder.update_detector(text_placement);
}
}
}
}
else if (geom.num_points() > 1 && sym.get_label_placement() == LINE_PLACEMENT)
{
placement text_placement(info, sym, w, h, true);
text_placement.avoid_edges = sym.get_avoid_edges();
finder.find_point_placements<path_type>(text_placement,path);
for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ ii)
{
double x = text_placement.placements[ii].starting_x;
double y = text_placement.placements[ii].starting_y;
int px=int(x - (w/2));
int py=int(y - (h/2));
agg::trans_affine matrix = agg::trans_affine_translation(px, py);
(*marker)->render(*ras_ptr, sl, ren, matrix, renb.clip_box(), sym.get_opacity());
box2d<double> dim = text_ren.prepare_glyphs(&text_placement.placements[ii]);
text_ren.render(x,y);
}
finder.update_detector(text_placement);
}
}
}
}
}
}
else
{
boost::optional<image_ptr> data = image_cache::instance()->find(filename,true);
if (text.length() > 0 && data)
{
@ -194,6 +343,7 @@ void agg_renderer<T>::process(shield_symbolizer const& sym,
}
}
}
}
}