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when using style level compositing or image filters still trigger style processing callbacks even if we return without querying the data if there are active rules - closes #1477

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This commit is contained in:
Dane Springmeyer 2012-09-14 16:13:37 -07:00
parent 1b3dcda87d
commit 56585d11d9
2 changed files with 45 additions and 21 deletions
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2
CHANGELOG.md
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@ -8,6 +8,8 @@ For a complete change history, see the git log.
## Future
- Allow style level compositing operations to work outside of featureset extents across tiled requests (#1477)
- Support for encoding `literal` postgres types as strings 69fb17cd3/#1466
- Fixed zoom_all behavior when Map maximum-extent is provided. Previously maximum-extent was used outright but

52
include/mapnik/feature_style_processor_impl.hpp
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@ -256,6 +256,7 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
box2d<double> layer_ext = lay.envelope();
bool fw_success = false;
bool early_return = false;
// first, try intersection of map extent forward projected into layer srs
if (prj_trans.forward(buffered_query_ext, PROJ_ENVELOPE_POINTS) && buffered_query_ext.intersects(layer_ext))
@ -266,10 +267,7 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
// if no intersection and projections are also equal, early return
else if (prj_trans.equal())
{
#if defined(RENDERING_STATS)
layer_timer.discard();
#endif
return;
early_return = true;
}
// next try intersection of layer extent back projected into map srs
else if (prj_trans.backward(layer_ext, PROJ_ENVELOPE_POINTS) && buffered_query_ext.intersects(layer_ext))
@ -278,7 +276,7 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
// forward project layer extent back into native projection
if (! prj_trans.forward(layer_ext, PROJ_ENVELOPE_POINTS))
{
MAPNIK_LOG_DEBUG(feature_style_processor)
MAPNIK_LOG_ERROR(feature_style_processor)
<< "feature_style_processor: Layer=" << lay.name()
<< " extent=" << layer_ext << " in map projection "
<< " did not reproject properly back to layer projection";
@ -287,6 +285,31 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
else
{
// if no intersection then nothing to do for layer
early_return = true;
}
if (early_return)
{
// check for styles needing compositing operations applied
// https://github.com/mapnik/mapnik/issues/1477
BOOST_FOREACH(std::string const& style_name, style_names)
{
boost::optional<feature_type_style const&> style=m_.find_style(style_name);
if (!style)
{
continue;
}
if (style->comp_op() || style->image_filters().size() > 0)
{
if (style->active(scale_denom))
{
std::clog << "triggering\n";
// trigger any needed compositing ops
p.start_style_processing(*style);
p.end_style_processing(*style);
}
}
}
#if defined(RENDERING_STATS)
layer_timer.discard();
#endif
@ -344,9 +367,8 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
continue;
}
const std::vector<rule>& rules=(*style).get_rules();
std::vector<rule> const& rules=(*style).get_rules();
bool active_rules=false;
BOOST_FOREACH(rule const& r, rules)
{
if (r.active(scale_denom))
@ -444,16 +466,16 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
}
else if (cache_features)
{
memory_datasource cache;
featureset_ptr features = ds->features(q);
if (features) {
// Cache all features into the memory_datasource before rendering.
memory_datasource cache;
feature_ptr feature;
while ((feature = features->next()))
{
cache.push(feature);
}
}
int i = 0;
BOOST_FOREACH (feature_type_style * style, active_styles)
{
@ -461,18 +483,14 @@ void feature_style_processor<Processor>::apply_to_layer(layer const& lay, Proces
cache.features(q), prj_trans, scale_denom);
}
}
}
// We only have a single style and no grouping.
else
{
int i = 0;
BOOST_FOREACH (feature_type_style * style, active_styles)
{
featureset_ptr features = ds->features(q);
if (features) {
render_style(lay, p, style, style_names[i++],
features, prj_trans, scale_denom);
}
ds->features(q), prj_trans, scale_denom);
}
}
}
@ -495,8 +513,12 @@ void feature_style_processor<Processor>::render_style(
proj_transform const& prj_trans,
double scale_denom)
{
p.start_style_processing(*style);
if (!features)
{
p.end_style_processing(*style);
return;
}
#if defined(RENDERING_STATS)
std::ostringstream s1;