Intel Extensible Firmware Interface - Manual (Page 302)

Extensible Firmware Interface Specification
10-8 12/01/02 Version 1.10
10.2.1 ConsoleOut or StandardError
The SIMPLE_TEXT_OUTPUT protocol must implement the same Unicode code pages as the
SIMPLE_INPUT protocol. The protocol must also support the Unicode control characters defined
in Table 10-1. The SIMPLE_TEXT_OUTPUT protocol supports special manipulation of the screen
by programmatic methods and therefore does not support the EFI scan codes defined in Table 10-2.
10.3 Simple Text Output Protocol
The Simple Text Output protocol defines the minimum requirements for a text-based
ConsoleOut device. The EFI specification requires that the SIMPLE_INPUT protocol support
the same languages as the corresponding SIMPLE_TEXT_OUTPUT protocol.
SIMPLE_TEXT_OUTPUT Protocol
Summary
This protocol is used to control text-based output devices.
GUID
#define SIMPLE_TEXT_OUTPUT_PROTOCOL \
{ 387477c2-69c7-11d2-8e39-00a0c969723b }
Protocol Interface Structure
typedef struct _SIMPLE_TEXT_OUTPUT_INTERFACE {
EFI_TEXT_RESET Reset;
EFI_TEXT_STRING OutputString;
EFI_TEXT_TEST_STRING TestString;
EFI_TEXT_QUERY_MODE QueryMode;
EFI_TEXT_SET_MODE SetMode;
EFI_TEXT_SET_ATTRIBUTE SetAttribute;
EFI_TEXT_CLEAR_SCREEN ClearScreen;
EFI_TEXT_SET_CURSOR_POSITION SetCursorPosition;
EFI_TEXT_ENABLE_CURSOR EnableCursor;
SIMPLE_TEXT_OUTPUT_MODE *Mode;
} SIMPLE_TEXT_OUTPUT_INTERFACE;
Parameters
Reset Reset the ConsoleOut device. See Reset() .
OutputString Displays the Unicode string on the device at the current cursor location.
See
OutputString() .
TestString Tests to see if the ConsoleOut device supports this Unicode string.
See TestString() .
QueryMode Queries information concerning the output device’s supported text mode.
See
QueryMode() .