Method readImage

source/base/StarAssets.cpp:960–1007

}

ImageConstPtr Assets::readImage(String const& path) const {
  if (auto p = m_files.ptr(path)) {
    ImageConstPtr image;
    if (auto memorySource = as<MemoryAssetSource>(p->source))
      image = memorySource->image(p->sourceName);
    if (!image)
      image = make_shared<Image>(Image::readPng(p->source->open(p->sourceName)));

    if (!p->patchSources.empty()) {
      RecursiveMutexLocker luaLocker(m_luaMutex);
      LuaEngine* luaEngine = as<LuaEngine>(m_luaEngine.get());
      LuaValue result = luaEngine->createUserData(*image);
      luaLocker.unlock();
      for (auto const& pair : p->patchSources) {
        auto& patchPath = pair.first;
        auto& patchSource = pair.second;
        auto patchStream = patchSource->read(patchPath);
        if (patchPath.endsWith(".lua")) {
          std::pair<AssetSource*, String> contextKey = make_pair(patchSource.get(), patchPath);
          luaLocker.lock();
          LuaContextPtr& context = m_patchContexts[contextKey];
          if (!context) {
            context = make_shared<LuaContext>(luaEngine->createContext());
            context->load(patchStream, patchPath);
          }
          auto newResult = context->invokePath<LuaValue>("patch", result, path);
          if (!newResult.is<LuaNilType>()) {
            if (auto ud = newResult.ptr<LuaUserData>()) {
              if (ud->is<Image>())
                result = std::move(newResult);
              else
                Logger::warn("Patch '{}' for image '{}' returned a non-Image userdata value, ignoring");
            } else {
              Logger::warn("Patch '{}' for image '{}' returned a non-Image value, ignoring");
            }
          }
          luaLocker.unlock();
        } else {
          Logger::warn("Patch '{}' for image '{}' isn't a Lua script, ignoring", patchPath, path);
        }
      }
      image = make_shared<Image>(std::move(result.get<LuaUserData>().get<Image>()));
    }

    return image;
  }
  throw AssetException(strf("No such asset '{}'", path));
}


Json Assets::checkPatchArray(String const& path, AssetSourcePtr const& source, Json const result, JsonArray const patchData, Maybe<Json> const external) const {