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33 results

image_loader.cpp

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  • image_loader.cpp 2.68 KiB
    //------------------------------------------------------------------------------
    // Project Phoenix
    //
    // Copyright (c) 2017-2018 RWTH Aachen University, Germany,
    // Virtual Reality & Immersive Visualization Group.
    //------------------------------------------------------------------------------
    //                                 License
    //
    // Licensed under the 3-Clause BSD License (the "License");
    // you may not use this file except in compliance with the License.
    // See the file LICENSE for the full text.
    // You may obtain a copy of the License at
    //
    //     https://opensource.org/licenses/BSD-3-Clause
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    //------------------------------------------------------------------------------
    
    #include "phx/image_loader.hpp"
    
    #include <boost/filesystem.hpp>
    
    #include <memory>
    #include <string>
    #include <utility>
    
    #include "phx/image.hpp"
    #include "phx/logger.hpp"
    #include "phx/resources_path.hpp"
    
    namespace phx {
    std::unique_ptr<Resource> ImageLoader::Load(
        const ResourceDeclaration& declaration) {
      if (declaration.find("file_name") == declaration.end() ||
          !declaration["file_name"].is_string()) {
        warn(
            "declaration {} cannot be parsed by ImageLoader, it does not "
            "contain a file_name key",
            declaration.dump());
        return nullptr;
      }
    
      auto filepath = declaration["file_name"].get<std::string>();
    
      std::unique_ptr<Image> image;
      if (boost::filesystem::exists(filepath.c_str()))
        image = std::make_unique<Image>(filepath.c_str());
      else
        image = std::make_unique<Image>(
            std::array<std::uint8_t, 4>{255u, 0u, 255u, 255u},
            std::array<std::size_t, 2>{32u, 32u});
    
      int bit_format = 32;
      if (declaration.find("bit_format") == declaration.end() ||
          !declaration["bit_format"].is_number_integer()) {
        debug("declaration {} does not contain bit_format, use 32",
              declaration.dump());
      } else {
        bit_format = declaration["bit_format"].get<int>();
      }
    
      switch (bit_format) {
        case 4:
          image->To4Bits();
          break;
        case 8:
          image->To8Bits();
          break;
        case 16:
          image->To16Bits();
          break;
        case 24:
          image->To24Bits();
          break;
        case 32:
          image->To32Bits();
          break;
        default:
          warn("[ImageLoader] bit_format {} not supported, use 32 bits instead",
               bit_format);
          image->To32Bits();
          break;
      }
    
      return std::move(image);
    }
    }  // namespace phx