C++ EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL::SetAttribute方法代码示例

/**
  Event handler registered with the Data Hub to parse EFI_DEBUG_CODE. This
  handler reads the Data Hub and sends any DEBUG info to StdErr.

  @param Event      The event that occured, not used
  @param Context    DataHub Protocol Pointer
**/
VOID
EFIAPI
DataHubStdErrEventHandler (
  IN EFI_EVENT Event,
  IN VOID      *Context
  )
{
  EFI_STATUS                           Status;
  EFI_DATA_HUB_PROTOCOL                *DataHub;
  EFI_DATA_RECORD_HEADER               *Record;
  DATA_HUB_STATUS_CODE_DATA_RECORD     *DataRecord;
  UINT64                               Mtc;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL      *Sto;
  INT32                                OldAttribute;

  DataHub = (EFI_DATA_HUB_PROTOCOL *) Context;

  //
  // If StdErr is not yet initialized just return a DEBUG print in the BDS
  // after consoles are connect will make sure data gets flushed properly
  // when StdErr is available.
  //
  if (gST == NULL) {
    return ;
  }

  if (gST->StdErr == NULL) {
    return ;
  }

  //
  // Mtc of zero means return the next record that has not been read by the
  // event handler.
  //
  Mtc = 0;
  do {
    Status = DataHub->GetNextRecord (DataHub, &Mtc, &mDataHubStdErrEvent, &Record);
    if (!EFI_ERROR (Status)) {
      if (CompareGuid (&Record->DataRecordGuid, &gEfiDataHubStatusCodeRecordGuid)) {
        DataRecord = (DATA_HUB_STATUS_CODE_DATA_RECORD *) (((CHAR8 *) Record) + Record->HeaderSize);

        if (DataRecord->Data.HeaderSize > 0) {
          if (CompareGuid (&DataRecord->Data.Type, &gEfiStatusCodeDataTypeDebugGuid)) {
            //
            // If the Data record is from a DEBUG () then send it to Standard Error
            //
            Sto           = gST->StdErr;
            OldAttribute  = Sto->Mode->Attribute;
            Sto->SetAttribute (Sto, EFI_TEXT_ATTR (EFI_MAGENTA, EFI_BLACK));
            Sto->OutputString (Sto, (CHAR16 *) (DataRecord + 1));
            Sto->SetAttribute (Sto, OldAttribute);
          }
        }
      }
    }
  } while ((Mtc != 0) && !EFI_ERROR (Status));
}

/**
 * Sets text foreground color.
 * @see COLORS
 * @param color new foreground color
 */
void textcolor (int color)
{
	EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *Proto;

	Proto = gST->ConOut;
	
	Proto->SetAttribute(Proto, color);
}

/**
 * Sets text background color.
 * @see COLORS
 * @param color new background color
 */
void textbackground (int color)
{
	EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *Proto;

	Proto = gST->ConOut;

	color <<= 4;

	Proto->SetAttribute(Proto, color);
}

/**
  Draws a dialog box to the console output device specified by
  ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
  from the console input device specified by ConIn defined in the
  EFI_SYSTEM_TABLE.

  If there are no strings in the variable argument list, then ASSERT().
  If all the strings in the variable argument list are empty, then ASSERT().

  @param[in]   Attribute  Specifies the foreground and background color of the popup.
  @param[out]  Key        A pointer to the EFI_KEY value of the key that was
                          pressed.  This is an optional parameter that may be NULL.
                          If it is NULL then no wait for a keypress will be performed.
  @param[in]  ...         The variable argument list that contains pointers to Null-
                          terminated Unicode strings to display in the dialog box.
                          The variable argument list is terminated by a NULL.

**/
VOID
EFIAPI
CreatePopUp (
  IN  UINTN          Attribute,
  OUT EFI_INPUT_KEY  *Key,      OPTIONAL
  ...
  )
{
  EFI_STATUS                       Status;
  VA_LIST                          Args;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *ConOut;
  EFI_SIMPLE_TEXT_OUTPUT_MODE      SavedConsoleMode;
  UINTN                            Columns;
  UINTN                            Rows;
  UINTN                            Column;
  UINTN                            Row;
  UINTN                            NumberOfLines;
  UINTN                            MaxLength;
  CHAR16                           *String;
  UINTN                            Length;
  CHAR16                           *Line;
  UINTN                            EventIndex;

  //
  // Determine the length of the longest line in the popup and the the total
  // number of lines in the popup
  //
  VA_START (Args, Key);
  MaxLength = 0;
  NumberOfLines = 0;
  while ((String = VA_ARG (Args, CHAR16 *)) != NULL) {
    MaxLength = MAX (MaxLength, StrLen (String));
    NumberOfLines++;
  }
  VA_END (Args);

  //
  // If the total number of lines in the popup is zero, then ASSERT()
  //
  ASSERT (NumberOfLines != 0);

  //
  // If the maximum length of all the strings is zero, then ASSERT()
  //
  ASSERT (MaxLength != 0);

  //
  // Cache a pointer to the Simple Text Output Protocol in the EFI System Table
  //
  ConOut = gST->ConOut;

  //
  // Save the current console cursor position and attributes
  //
  CopyMem (&SavedConsoleMode, ConOut->Mode, sizeof (SavedConsoleMode));

  //
  // Retrieve the number of columns and rows in the current console mode
  //
  ConOut->QueryMode (ConOut, SavedConsoleMode.Mode, &Columns, &Rows);

  //
  // Disable cursor and set the foreground and background colors specified by Attribute
  //
  ConOut->EnableCursor (ConOut, FALSE);
  ConOut->SetAttribute (ConOut, Attribute);

  //
  // Limit NumberOfLines to height of the screen minus 3 rows for the box itself
  //
  NumberOfLines = MIN (NumberOfLines, Rows - 3);

  //
  // Limit MaxLength to width of the screen minus 2 columns for the box itself
  //
  MaxLength = MIN (MaxLength, Columns - 2);

  //
  // Compute the starting row and starting column for the popup
  //
  Row    = (Rows - (NumberOfLines + 3)) / 2;
  Column = (Columns - (MaxLength + 2)) / 2;
//.........这里部分代码省略.........