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Load the filter data only once per tile (optimization)

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This commit is contained in:
Martin Tůma 2018-11-05 23:13:44 +01:00
parent c13af94275
commit 5f890c7d33
1 changed files with 76 additions and 62 deletions
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138
src/pbf.cpp
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@ -17,26 +17,6 @@ using namespace google::protobuf;
#define LINESTRING vector_tile::Tile_GeomType::Tile_GeomType_LINESTRING
#define POINT vector_tile::Tile_GeomType::Tile_GeomType_POINT
struct Layer
{
Layer(const vector_tile::Tile_Layer *data) : data(data) {}
const vector_tile::Tile_Layer *data;
QVector<QString> keys;
QVector<QVariant> values;
};
struct Feature
{
Feature(const vector_tile::Tile_Feature *data, const QVector<QString> *keys,
const QVector<QVariant> *values) : data(data), keys(keys),
values(values) {}
const vector_tile::Tile_Feature *data;
const QVector<QString> *keys;
const QVector<QVariant> *values;
};
static QVariant value(const vector_tile::Tile_Value &val)
{
if (val.has_bool_value())
@ -57,55 +37,94 @@ static QVariant value(const vector_tile::Tile_Value &val)
return QVariant();
}
class Feature
{
public:
Feature(const vector_tile::Tile_Feature *data, const QVector<QString> *keys,
const QVector<QVariant> *values) : _data(data)
{
for (int i = 0; i < data->tags_size(); i = i + 2)
_tags.insert(keys->at(data->tags(i)), values->at(data->tags(i+1)));
switch (data->type()) {
case POLYGON:
_tags.insert("$type", QVariant("Polygon"));
break;
case LINESTRING:
_tags.insert("$type", QVariant("LineString"));
break;
case POINT:
_tags.insert("$type", QVariant("Point"));
break;
default:
break;
}
}
const QVariantMap &tags() const {return _tags;}
const vector_tile::Tile_Feature *data() const {return _data;}
private:
QVariantMap _tags;
const vector_tile::Tile_Feature *_data;
};
class Layer
{
public:
Layer(const vector_tile::Tile_Layer *data) : _data(data)
{
QVector<QString> keys;
QVector<QVariant> values;
for (int i = 0; i < data->keys_size(); i++)
keys.append(QString::fromStdString(data->keys(i)));
for (int i = 0; i < data->values_size(); i++)
values.append(value(data->values(i)));
for (int i = 0; i < data->features_size(); i++)
_features.append(Feature(&(data->features(i)), &keys, &values));
}
const QList<Feature> &features() const {return _features;}
const vector_tile::Tile_Layer *data() const {return _data;}
private:
const vector_tile::Tile_Layer *_data;
QList<Feature> _features;
};
static QPoint parameters(quint32 v1, quint32 v2)
{
return QPoint((v1 >> 1) ^ (-(v1 & 1)), ((v2 >> 1) ^ (-(v2 & 1))));
}
static void feature(const Feature &feature, Style *style, int styleLayer,
static void drawFeature(const Feature &feature, Style *style, int styleLayer,
qreal factor, Tile &tile)
{
QVariantMap tags;
for (int i = 0; i < feature.data->tags_size(); i = i + 2)
tags.insert(feature.keys->at(feature.data->tags(i)),
feature.values->at(feature.data->tags(i+1)));
switch (feature.data->type()) {
case POLYGON:
tags.insert("$type", QVariant("Polygon"));
break;
case LINESTRING:
tags.insert("$type", QVariant("LineString"));
break;
case POINT:
tags.insert("$type", QVariant("Point"));
break;
default:
break;
}
if (!style->match(styleLayer, tags))
if (!style->match(styleLayer, feature.tags()))
return;
QPoint cursor;
QPainterPath path;
for (int i = 0; i < feature.data->geometry_size(); i++) {
quint32 g = feature.data->geometry(i);
for (int i = 0; i < feature.data()->geometry_size(); i++) {
quint32 g = feature.data()->geometry(i);
unsigned cmdId = g & 0x7;
unsigned cmdCount = g >> 3;
if (cmdId == MOVE_TO) {
for (unsigned j = 0; j < cmdCount; j++) {
QPoint offset = parameters(feature.data->geometry(i+1),
feature.data->geometry(i+2));
QPoint offset = parameters(feature.data()->geometry(i+1),
feature.data()->geometry(i+2));
i += 2;
cursor += offset;
path.moveTo(QPointF(cursor) / factor);
}
} else if (cmdId == LINE_TO) {
for (unsigned j = 0; j < cmdCount; j++) {
QPoint offset = parameters(feature.data->geometry(i+1),
feature.data->geometry(i+2));
QPoint offset = parameters(feature.data()->geometry(i+1),
feature.data()->geometry(i+2));
i += 2;
cursor += offset;
path.lineTo(QPointF(cursor) / factor);
@ -116,19 +135,19 @@ static void feature(const Feature &feature, Style *style, int styleLayer,
}
}
style->drawFeature(styleLayer, path, tags, tile);
style->drawFeature(styleLayer, path, feature.tags(), tile);
}
static void layer(const Layer &layer, Style *style, int styleLayer, Tile &tile)
static void drawLayer(const Layer &layer, Style *style, int styleLayer,
Tile &tile)
{
if (layer.data->version() > 2)
if (layer.data()->version() > 2)
return;
qreal factor = layer.data->extent() / (qreal)tile.size();
qreal factor = layer.data()->extent() / (qreal)tile.size();
for (int i = 0; i < layer.data->features_size(); i++)
feature(Feature(&(layer.data->features(i)), &(layer.keys),
&(layer.values)), style, styleLayer, factor, tile);
for (int i = 0; i < layer.features().size(); i++)
drawFeature(layer.features().at(i), style, styleLayer, factor, tile);
}
QImage PBF::image(const QByteArray &data, int zoom, Style *style, int size)
@ -147,14 +166,9 @@ QImage PBF::image(const QByteArray &data, int zoom, Style *style, int size)
QMap<QString, Layer> layers;
for (int i = 0; i < tile.layers_size(); i++) {
const vector_tile::Tile_Layer &layer = tile.layers(i);
Layer l(&layer);
for (int j = 0; j < layer.keys_size(); j++)
l.keys.append(QString::fromStdString(layer.keys(j)));
for (int j = 0; j < layer.values_size(); j++)
l.values.append(value(layer.values(j)));
layers.insert(QString::fromStdString(tile.layers(i).name()), l);
QString name(QString::fromStdString(layer.name()));
if (style->sourceLayers().contains(name))
layers.insert(name, Layer(&layer));
}
// Process data in order of style layers
@ -164,7 +178,7 @@ QImage PBF::image(const QByteArray &data, int zoom, Style *style, int size)
if (it == layers.constEnd())
continue;
layer(*it, style, i, t);
drawLayer(*it, style, i, t);
}
return t.render();