Method MakeFromData

src/core/codecs/jpeg/JpegCodec.cpp:81–111

}

std::shared_ptr<ImageCodec> JpegCodec::MakeFromData(const std::string& filePath,
                                                    std::shared_ptr<Data> byteData) {
  FILE* infile = nullptr;
  if (byteData == nullptr && (infile = fopen(filePath.c_str(), "rb")) == nullptr) {
    return nullptr;
  }
  jpeg_decompress_struct cinfo = {};
  my_error_mgr jerr = {};
  cinfo.err = jpeg_std_error(&jerr.pub);
  Orientation orientation = Orientation::TopLeft;
  do {
    if (setjmp(jerr.setjmp_buffer)) break;
    jpeg_create_decompress(&cinfo);
    if (infile) {
      jpeg_stdio_src(&cinfo, infile);
    } else {
      jpeg_mem_src(&cinfo, byteData->bytes(), byteData->size());
    }
    jpeg_save_markers(&cinfo, kExifMarker, 0xFFFF);
    if (jpeg_read_header(&cinfo, TRUE) != JPEG_HEADER_OK) break;
    orientation = get_exif_orientation(&cinfo);
  } while (false);
  jpeg_destroy_decompress(&cinfo);
  if (infile) fclose(infile);
  if (cinfo.image_width == 0 || cinfo.image_height == 0) {
    return nullptr;
  }
  return std::shared_ptr<ImageCodec>(new JpegCodec(static_cast<int>(cinfo.image_width),
                                                   static_cast<int>(cinfo.image_height),
                                                   orientation, filePath, std::move(byteData)));
}

bool ExtractICCProfile(jpeg_decompress_struct* cinfo, std::vector<uint8_t>& iccProfileData) {
  jpeg_saved_marker_ptr marker = cinfo->marker_list;