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vector_tile_tile.ipp
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vector_tile_tile.ipp
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// mapnik-vector-tile
#include "vector_tile_config.hpp"
#include "vector_tile_layer.hpp"
//protozero
#include <protozero/pbf_reader.hpp>
#include <protozero/pbf_writer.hpp>
// std
#include <set>
#include <string>
namespace mapnik
{
namespace vector_tile_impl
{
MAPNIK_VECTOR_INLINE bool tile::add_layer(tile_layer const& layer)
{
std::string const& new_name = layer.name();
if (layer.is_empty())
{
return false;
}
else
{
painted_layers_.insert(new_name);
auto p = layers_set_.insert(new_name);
if (!p.second)
{
// Layer already in tile
return false;
}
layers_.push_back(new_name);
protozero::pbf_writer tile_writer(buffer_);
tile_writer.add_message(Tile_Encoding::LAYERS, layer.get_data());
}
return true;
}
MAPNIK_VECTOR_INLINE bool tile::append_layer_buffer(const char * data, std::size_t size, std::string const& name)
{
painted_layers_.insert(name);
auto p = layers_set_.insert(name);
if (!p.second)
{
// Layer already in tile
return false;
}
layers_.push_back(name);
protozero::pbf_writer writer(buffer_);
writer.add_message(3, data, size);
return true;
}
MAPNIK_VECTOR_INLINE bool tile::layer_reader(std::string const& name, protozero::pbf_reader & layer_msg) const
{
protozero::pbf_reader item(buffer_.data(), buffer_.size());
while (item.next(Tile_Encoding::LAYERS))
{
layer_msg = item.get_message();
protozero::pbf_reader lay(layer_msg);
while (lay.next(Layer_Encoding::NAME))
{
if (lay.get_string() == name)
{
return true;
}
}
}
return false;
}
MAPNIK_VECTOR_INLINE bool tile::layer_reader(std::size_t index, protozero::pbf_reader & layer_msg) const
{
protozero::pbf_reader item(buffer_.data(), buffer_.size());
std::size_t idx = 0;
while (item.next(Tile_Encoding::LAYERS))
{
if (idx == index)
{
layer_msg = item.get_message();
return true;
}
++idx;
item.skip();
}
return false;
}
} // end ns vector_tile_impl
} // end ns mapnik