extern EFI_STATUS efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)

    EFI_STATUS Status;

    EFI_INPUT_KEY Key;

    EFI_BOOT_SERVICES* BS;

 

    /* Store the system table for future use in other functions */

    ST = SystemTable;

    BS = ST->BootServices;

    /* Say hi */

    Status = ST->ConOut->OutputString(ST->ConOut, L"Hello World\r\n"); // EFI Applications use Unicode and CRLF, a la Windows

    if (EFI_ERROR(Status))

        return Status;

    EFI_GUID gopGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;

    EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;

 

    Status = BS->LocateProtocol(&gopGuid, NULL, (void**)&gop);

    if(EFI_ERROR(Status))

      Status = ST->ConOut->OutputString(ST->ConOut, L"Unable To  alocate gop");

    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;

    UINTN SizeOfInfo, numModes, nativeMode;

   

    Status = gop->QueryMode(gop, gop->Mode==NULL?0:gop->Mode->Mode, &SizeOfInfo, &info);

    // this is needed to get the current video mode

    if (Status == EFI_NOT_STARTED)

      Status = gop->SetMode(gop, 0);

    if(EFI_ERROR(Status)) {

      Status = ST->ConOut->OutputString(ST->ConOut, L"Unable to get native mode\n");

    } else {

      nativeMode = gop->Mode->Mode;

      numModes = gop->Mode->MaxMode;

    }

    for (int i = 0; i < numModes; i++) {

      char X[33];

      char B[1080];

      unsigned char HZR = (unsigned char)info->HorizontalResolution;

      unsigned char VRR = (unsigned char)info->VerticalResolution;

 

      Status = gop->QueryMode(gop, i, &SizeOfInfo, &info);

      Status = ST->ConOut->OutputString(ST->ConOut, L"mode");

      Status = ST->ConOut->OutputString(ST->ConOut, (CHAR16*)itoa(i, X, 10));

      EndLine(Status);

      Status = ST->ConOut->OutputString(ST->ConOut, L"width");

      Status = ST->ConOut->OutputString(ST->ConOut, (CHAR16*)itoa(info->HorizontalResolution, B, 10));

      EndLine(Status);

      Status = ST->ConOut->OutputString(ST->ConOut, L"Height");

      Status = ST->ConOut->OutputString(ST->ConOut, (CHAR16*)itoa(info->VerticalResolution, B, 10));

      EndLine(Status);

      Status = ST->ConOut->OutputString(ST->ConOut, L"Format");

      Status = ST->ConOut->OutputString(ST->ConOut, (CHAR16*)itoa(info->PixelFormat,B,10));

      EndLine(Status);

      if(i == nativeMode)

          Status = ST->ConOut->OutputString(ST->ConOut, L"(Current)");

      else

          Status = ST->ConOut->OutputString(ST->ConOut, L"...");

 

 

    }

 

   

    while(1 == 1);