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+ apply dynamic width and/or height

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+ make 'width/height' pair and 'transform' mutually exlusive
This commit is contained in:
artemp 2012-07-09 10:22:19 +01:00
parent 58bd55b075
commit f656efaa49
1 changed files with 46 additions and 5 deletions
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51
src/agg/process_markers_symbolizer.cpp
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@ -82,6 +82,42 @@ bool push_explicit_style(Attr const& src, Attr & dst, markers_symbolizer const&
return false;
}
template <typename T>
void setup_label_transform(agg::trans_affine & tr, box2d<double> const& bbox, mapnik::feature_impl const& feature, T const& sym)
{
int width = 0;
int height = 0;
expression_ptr const& width_expr = sym.get_width();
if (width_expr)
width = boost::apply_visitor(evaluate<Feature,value_type>(feature), *width_expr).to_int();
expression_ptr const& height_expr = sym.get_height();
if (height_expr)
height = boost::apply_visitor(evaluate<Feature,value_type>(feature), *height_expr).to_int();
if (width > 0 && height > 0)
{
double sx = width/bbox.width();
double sy = height/bbox.height();
tr *= agg::trans_affine_scaling(sx,sy);
}
else if (width > 0)
{
double sx = width/bbox.width();
tr *= agg::trans_affine_scaling(sx);
}
else if (height > 0)
{
double sy = height/bbox.height();
tr *= agg::trans_affine_scaling(sy);
}
else
{
evaluate_transform(tr, feature, sym.get_image_transform());
}
}
template <typename T>
void agg_renderer<T>::process(markers_symbolizer const& sym,
mapnik::feature_impl & feature,
@ -106,9 +142,6 @@ void agg_renderer<T>::process(markers_symbolizer const& sym,
pixf.comp_op(static_cast<agg::comp_op_e>(sym.comp_op()));
renderer_base renb(pixf);
renderer_type ren(renb);
agg::trans_affine tr;
evaluate_transform(tr, feature, sym.get_image_transform());
tr = agg::trans_affine_scaling(scale_factor_) * tr;
agg::trans_affine geom_tr;
evaluate_transform(geom_tr, feature, sym.get_transform());
@ -124,13 +157,21 @@ void agg_renderer<T>::process(markers_symbolizer const& sym,
if (!(*mark)->is_vector())
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: markers_symbolizer does not yet support non-SVG markers";
return;
}
boost::optional<path_ptr> marker = (*mark)->get_vector_data();
box2d<double> const& bbox = (*marker)->bounding_box();
coord2d center = bbox.center();
agg::trans_affine tr;
setup_label_transform(tr, bbox, feature, sym);
tr = agg::trans_affine_scaling(scale_factor_) * tr;
coord2d center = bbox.center();
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine marker_trans = recenter * tr;