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#include <llmr/style/style.hpp>
#include <llmr/resources/style.hpp>
using namespace llmr;
Style::Style() {
appliedClasses.insert("default");
}
void Style::reset() {
computed.fills.clear();
computed.strokes.clear();
}
void Style::load(const uint8_t *const data, uint32_t bytes) {
pbf style(data, bytes);
while (style.next()) {
if (style.tag == 1) { // bucket
buckets.insert(loadBucket(style.message()));
} else if (style.tag == 2) { // structure
layers.push_back(loadLayer(style.message()));
} else if (style.tag == 3) { // class
classes.insert(loadClass(style.message()));
} else {
style.skip();
}
}
cascade();
}
std::pair<std::string, BucketDescription> Style::loadBucket(pbf data) {
BucketDescription bucket;
std::string name;
while (data.next()) {
if (data.tag == 1) { // name
name = data.string();
} else if (data.tag == 2) { // type
bucket.type = (BucketType)data.varint();
} else if (data.tag == 3) { // source_name
bucket.source_name = data.string();
} else if (data.tag == 4) { // source_layer
bucket.source_layer = data.string();
} else if (data.tag == 5) { // source_field
bucket.source_field = data.string();
} else if (data.tag == 6) { // source_value
bucket.source_value.emplace_back(parseValue(data.message()));
} else if (data.tag == 7) { // cap
bucket.cap = (CapType)data.varint();
} else if (data.tag == 8) { // join
bucket.join = (JoinType)data.varint();
} else if (data.tag == 9) { // font
bucket.font = data.string();
} else if (data.tag == 10) { // font_size
bucket.font_size = data.float32();
} else {
data.skip();
}
}
return { name, bucket };
}
LayerDescription Style::loadLayer(pbf data) {
LayerDescription layer;
while (data.next()) {
if (data.tag == 1) { // name
layer.name = data.string();
} else if (data.tag == 2) { // bucket_name
layer.bucket_name = data.string();
} else if (data.tag == 3) { // child_layer
layer.child_layer.emplace_back(loadLayer(data.message()));
} else {
data.skip();
}
}
return layer;
}
std::pair<std::string, ClassDescription> Style::loadClass(pbf data) {
ClassDescription klass;
std::string name;
while (data.next()) {
if (data.tag == 1) { // name
name = data.string();
} else if (data.tag == 2) { // layer_style
klass.insert(loadLayerStyle(data.message()));
} else {
data.skip();
}
}
return { name, klass };
}
std::pair<std::string, LayerStyleDescription> Style::loadLayerStyle(pbf data) {
LayerStyleDescription layerStyle;
std::string name;
while (data.next()) {
if (data.tag == 1) { // name
name = data.string();
} else if (data.tag == 2) { // color
uint32_t rgba = data.fixed<uint32_t, 4>();
layerStyle.color = {{
(float)((rgba >> 24) & 0xFF) / 0xFF,
(float)((rgba >> 16) & 0xFF) / 0xFF,
(float)((rgba >> 8) & 0xFF) / 0xFF,
(float)((rgba >> 0) & 0xFF) / 0xFF
}};
} else if (data.tag == 3) { // antialias
layerStyle.antialias = data.boolean();
} else if (data.tag == 4) { // width
layerStyle.width = loadWidth(data.message());
} else {
data.skip();
}
}
return { name, layerStyle };
}
WidthDescription Style::loadWidth(pbf data) {
WidthDescription width;
while (data.next()) {
if (data.tag == 1) { // scaling
width.scaling = data.string();
} else if (data.tag == 2) { // value
// read a packed float32
pbf floats = data.message();
while (floats) {
width.value.push_back(floats.float32());
}
} else {
data.skip();
}
}
return width;
}
void Style::cascade() {
reset();
// Recalculate style
// Basic cascading
for (const auto& class_pair : classes) {
const std::string& class_name = class_pair.first;
const ClassDescription& sheetClass = class_pair.second;
// Not enabled
if (appliedClasses.find(class_name) == appliedClasses.end()) continue;
for (const auto& layer_pair : sheetClass) {
const std::string& layer_name = layer_pair.first;
const LayerStyleDescription& layer = layer_pair.second;
// Find out what type this layer style is.
computed.fills[layer_name].enabled = true;
computed.fills[layer_name].antialiasing = layer.antialias;
computed.fills[layer_name].fill_color = layer.color;
computed.fills[layer_name].stroke_color = layer.color;
}
}
}
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