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cairo support for layer level comp-op and opacity

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This commit is contained in:
Jiri Drbalek 2016-08-29 15:24:49 +00:00
parent d7ba7dc0db
commit 15daac26e7
1 changed files with 14 additions and 1 deletions
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15
src/cairo/cairo_renderer.cpp
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@ -188,12 +188,25 @@ void cairo_renderer<T>::start_layer_processing(layer const& lay, box2d<double> c
common_.detector_->clear();
}
common_.query_extent_ = query_extent;
if (lay.comp_op() || lay.get_opacity() < 1.0)
{
context_.push_group();
}
}
template <typename T>
void cairo_renderer<T>::end_layer_processing(layer const&)
void cairo_renderer<T>::end_layer_processing(layer const& lay)
{
MAPNIK_LOG_DEBUG(cairo_renderer) << "cairo_renderer: End layer processing";
if (lay.comp_op() || lay.get_opacity() < 1.0)
{
context_.pop_group();
composite_mode_e comp_op = lay.comp_op() ? *lay.comp_op() : src_over;
context_.set_operator(comp_op);
context_.paint(lay.get_opacity());
}
}
template <typename T>