Intel Extensible Firmware Interface, Specification

Page: 179 / 494

Console I/O Protocol
Version 1.02 12/12/00 161
7.5.2 SIMPLE_TEXT_OUTPUT.OutputString()
Summary
Writes a Unicode string to the output device.
Prototype
EFI_STATUS
(EFIAPI *EFI_TEXT_STRING) (
IN SIMPLE_TEXT_OUTPUT_INTERFACE *This,
IN CHAR16 *String
);
Parameters
This
A pointer to the
SIMPLE_TEXT_OUTPUT_INTERFACE
instance.
Type
SIMPLE_TEXT_OUTPUT_INTERFACE
is defined in Section 7.5.
String
The Null-terminated Unicode string to be displayed on the output
device(s). All output devices must also support the Unicode drawing
characters defined in “Related Definitions”.
Related Definitions
//*******************************************************
// UNICODE DRAWING CHARACTERS
//*******************************************************
#define BOXDRAW_HORIZONTAL 0x2500
#define BOXDRAW_VERTICAL 0x2502
#define BOXDRAW_DOWN_RIGHT 0x250c
#define BOXDRAW_DOWN_LEFT 0x2510
#define BOXDRAW_UP_RIGHT 0x2514
#define BOXDRAW_UP_LEFT 0x2518
#define BOXDRAW_VERTICAL_RIGHT 0x251c
#define BOXDRAW_VERTICAL_LEFT 0x2524
#define BOXDRAW_DOWN_HORIZONTAL 0x252c
#define BOXDRAW_UP_HORIZONTAL 0x2534
#define BOXDRAW_VERTICAL_HORIZONTAL 0x253c
#define BOXDRAW_DOUBLE_HORIZONTAL 0x2550
#define BOXDRAW_DOUBLE_VERTICAL 0x2551
#define BOXDRAW_DOWN_RIGHT_DOUBLE 0x2552
#define BOXDRAW_DOWN_DOUBLE_RIGHT 0x2553
#define BOXDRAW_DOUBLE_DOWN_RIGHT 0x2554