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[efi] Support Unicode character output via text console 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/631/head
Michael Brown 2022-02-28 13:39:10 +00:00
parent 7e9631b60f
commit 2ff3385e00
1 changed files with 17 additions and 1 deletions
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18
src/interface/efi/efi_console.c
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@ -26,6 +26,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/ConsoleControl/ConsoleControl.h>
#include <ipxe/ansiesc.h>
#include <ipxe/utf8.h>
#include <ipxe/console.h>
#include <ipxe/keymap.h>
#include <ipxe/init.h>
@ -201,6 +202,9 @@ static struct ansiesc_context efi_ansiesc_ctx = {
.handlers = efi_ansiesc_handlers,
};
/** EFI console UTF-8 accumulator */
static struct utf8_accumulator efi_utf8_acc;
/**
* Print a character to EFI console
*
@ -208,13 +212,25 @@ static struct ansiesc_context efi_ansiesc_ctx = {
*/
static void efi_putchar ( int character ) {
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *conout = efi_systab->ConOut;
wchar_t wstr[] = { character, 0 };
wchar_t wstr[2];
/* Intercept ANSI escape sequences */
character = ansiesc_process ( &efi_ansiesc_ctx, character );
if ( character < 0 )
return;
/* Accumulate Unicode characters */
character = utf8_accumulate ( &efi_utf8_acc, character );
if ( character == 0 )
return;
/* Treat unrepresentable (non-UCS2) characters as invalid */
if ( character & ~( ( wchar_t ) -1UL ) )
character = UTF8_INVALID;
/* Output character */
wstr[0] = character;
wstr[1] = L'\0';
conout->OutputString ( conout, wstr );
}