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parse label shaping

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This commit is contained in:
Konstantin Käfer
2014-03-11 15:16:29 +01:00
parent 31d3c6339c
commit a37dcedc41
2 changed files with 82 additions and 4 deletions
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71
src/map/vector_tile.cpp
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@@ -79,11 +79,49 @@ VectorTileGlyph::VectorTileGlyph(pbf glyph) {
std::ostream& llmr::operator<<(std::ostream& os, const VectorTileGlyph& glyph) {
os << "Glyph " << glyph.id << ": " << glyph.width << "x" << glyph.height <<
" (" << glyph.left << "/" << glyph.top << ") +" << glyph.advance << std::endl;
" (" << glyph.left << "/" << glyph.top << ") +" << glyph.advance << std::endl;
return os;
}
class VectorTileLabel {
public:
VectorTileLabel(pbf data);
uint32_t text = 0;
uint32_t stack = 0;
std::vector<VectorTilePlacement> placements;
};
VectorTileLabel::VectorTileLabel(pbf label) {
pbf faces, glyphs, x, y;
while (label.next()) {
if (label.tag == 1) { // text
text = label.varint();
} else if (label.tag == 2) { // stack
stack = label.varint();
} else if (label.tag == 3) { // faces
faces = label.message();
} else if (label.tag == 4) { // glyphs
glyphs = label.message();
} else if (label.tag == 5) { // x
x = label.message();
} else if (label.tag == 6) { // y
y = label.message();
} else {
label.skip();
}
}
while (faces && glyphs && x && y) {
placements.emplace_back(faces.varint(), glyphs.varint(), x.varint(), y.varint());
}
}
VectorTileLayer::VectorTileLayer(pbf layer) : data(layer) {
std::vector<std::string> stacks;
std::vector<VectorTileLabel> labels;
while (layer.next()) {
if (layer.tag == 1) { // name
name = layer.string();
@@ -94,15 +132,40 @@ VectorTileLayer::VectorTileLayer(pbf layer) : data(layer) {
} else if (layer.tag == 5) { // extent
extent = layer.varint();
} else if (layer.tag == 7) { // faces
std::string face = layer.string();
faces.emplace_back(layer.string());
} else if (layer.tag == 8) { // labels
layer.skip();
labels.emplace_back(layer.message());
} else if (layer.tag == 9) { // stacks
std::string stack = layer.string();
stacks.emplace_back(layer.string());
} else {
layer.skip();
}
}
// Build index of [stack][text] => shaping information
for (VectorTileLabel& label : labels) {
if (values.size() <= label.text || stacks.size() <= label.stack) {
// The indices are out of range. Skip this label.
continue;
}
const Value& text = values[label.text];
const std::string& stack = stacks[label.stack];
shaping[stack][text].swap(label.placements);
}
}
VectorTilePlacement::VectorTilePlacement(uint32_t face, uint32_t glyph, uint32_t x, uint32_t y)
: face(face),
glyph(glyph),
x(x),
y(y) {
}
std::ostream& llmr::operator<<(std::ostream& os, const VectorTilePlacement& placement) {
os << "Glyph " << placement.face << "/" << placement.glyph << ": " << placement.x << "/" << placement.y << std::endl;
return os;
}
FilteredVectorTileLayer::FilteredVectorTileLayer(const VectorTileLayer& layer, const BucketDescription& bucket_desc)