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#include <mbgl/text/glyph_pbf.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/storage/resource.hpp>
#include <mbgl/storage/response.hpp>
#include <mbgl/text/font_stack.hpp>
#include <mbgl/text/glyph_store.hpp>
#include <mbgl/util/exception.hpp>
#include <mbgl/util/pbf.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/thread_context.hpp>
#include <mbgl/util/token.hpp>
#include <mbgl/util/url.hpp>
namespace {
void parseGlyphPBF(mbgl::FontStack& stack, const std::string& data) {
mbgl::pbf glyphs_pbf(reinterpret_cast<const uint8_t *>(data.data()), data.size());
while (glyphs_pbf.next()) {
if (glyphs_pbf.tag == 1) { // stacks
mbgl::pbf fontstack_pbf = glyphs_pbf.message();
while (fontstack_pbf.next()) {
if (fontstack_pbf.tag == 3) { // glyphs
mbgl::pbf glyph_pbf = fontstack_pbf.message();
mbgl::SDFGlyph glyph;
while (glyph_pbf.next()) {
if (glyph_pbf.tag == 1) { // id
glyph.id = glyph_pbf.varint();
} else if (glyph_pbf.tag == 2) { // bitmap
glyph.bitmap = glyph_pbf.string();
} else if (glyph_pbf.tag == 3) { // width
glyph.metrics.width = glyph_pbf.varint();
} else if (glyph_pbf.tag == 4) { // height
glyph.metrics.height = glyph_pbf.varint();
} else if (glyph_pbf.tag == 5) { // left
glyph.metrics.left = glyph_pbf.svarint();
} else if (glyph_pbf.tag == 6) { // top
glyph.metrics.top = glyph_pbf.svarint();
} else if (glyph_pbf.tag == 7) { // advance
glyph.metrics.advance = glyph_pbf.varint();
} else {
glyph_pbf.skip();
}
}
stack.insert(glyph.id, glyph);
} else {
fontstack_pbf.skip();
}
}
} else {
glyphs_pbf.skip();
}
}
}
} // namespace
namespace mbgl {
GlyphPBF::GlyphPBF(GlyphStore* store,
const std::string& fontStack,
const GlyphRange& glyphRange,
GlyphStore::Observer* observer_)
: parsed(false),
observer(observer_) {
FileSource* fs = util::ThreadContext::getFileSource();
req = fs->request(Resource::glyphs(store->getURL(), fontStack, glyphRange), [this, store, fontStack, glyphRange](Response res) {
if (res.error) {
observer->onGlyphsError(fontStack, glyphRange, std::make_exception_ptr(std::runtime_error(res.error->message)));
return;
}
if (res.notModified) {
return;
}
try {
parseGlyphPBF(**store->getFontStack(fontStack), *res.data);
} catch (...) {
observer->onGlyphsError(fontStack, glyphRange, std::current_exception());
return;
}
parsed = true;
observer->onGlyphsLoaded(fontStack, glyphRange);
});
}
GlyphPBF::~GlyphPBF() = default;
} // namespace mbgl
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