SpriteParseResult parseSprite(const std::string& image, const std::string& json) { Sprites sprites; PremultipliedImage raster; try { raster = decodeImage(image); } catch (...) { return std::current_exception(); } JSDocument doc; doc.Parse<0>(json.c_str()); if (doc.HasParseError()) { std::stringstream message; message << "Failed to parse JSON: " << rapidjson::GetParseError_En(doc.GetParseError()) << " at offset " << doc.GetErrorOffset(); return std::make_exception_ptr(std::runtime_error(message.str())); } else if (!doc.IsObject()) { return std::make_exception_ptr(std::runtime_error("Sprite JSON root must be an object")); } else { for (JSValue::ConstMemberIterator itr = doc.MemberBegin(); itr != doc.MemberEnd(); ++itr) { const std::string name = { itr->name.GetString(), itr->name.GetStringLength() }; const JSValue& value = itr->value; if (value.IsObject()) { const uint16_t x = getUInt16(value, "x", 0); const uint16_t y = getUInt16(value, "y", 0); const uint16_t width = getUInt16(value, "width", 0); const uint16_t height = getUInt16(value, "height", 0); const double pixelRatio = getDouble(value, "pixelRatio", 1); const bool sdf = getBoolean(value, "sdf", false); auto sprite = createSpriteImage(raster, x, y, width, height, pixelRatio, sdf); if (sprite) { sprites.emplace(name, sprite); } } } } return sprites; }
std::vector<std::unique_ptr<style::Image>> parseSprite(const std::string& encodedImage, const std::string& json) { const PremultipliedImage raster = decodeImage(encodedImage); JSDocument doc; doc.Parse<0>(json.c_str()); if (doc.HasParseError()) { std::stringstream message; message << "Failed to parse JSON: " << rapidjson::GetParseError_En(doc.GetParseError()) << " at offset " << doc.GetErrorOffset(); throw std::runtime_error(message.str()); } else if (!doc.IsObject()) { throw std::runtime_error("Sprite JSON root must be an object"); } else { std::vector<std::unique_ptr<style::Image>> images; for (const auto& property : doc.GetObject()) { const std::string name = { property.name.GetString(), property.name.GetStringLength() }; const JSValue& value = property.value; if (value.IsObject()) { const uint16_t x = getUInt16(value, "x", 0); const uint16_t y = getUInt16(value, "y", 0); const uint16_t width = getUInt16(value, "width", 0); const uint16_t height = getUInt16(value, "height", 0); const double pixelRatio = getDouble(value, "pixelRatio", 1); const bool sdf = getBoolean(value, "sdf", false); auto image = createStyleImage(name, raster, x, y, width, height, pixelRatio, sdf); if (image) { images.push_back(std::move(image)); } } } return images; } }