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