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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright © 2013 Intel Corporation
* Authored by Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
*/
#include <efi.h>
#include <efilib.h>
#include "graphics.h"
#include "missing_efi.h"
#include "util.h"
EFI_STATUS graphics_mode(bool on) {
EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
EFI_CONSOLE_CONTROL_SCREEN_MODE new;
EFI_CONSOLE_CONTROL_SCREEN_MODE current;
BOOLEAN uga_exists;
BOOLEAN stdin_locked;
EFI_STATUS err;
err = BS->LocateProtocol(MAKE_GUID_PTR(EFI_CONSOLE_CONTROL), NULL, (void **) &ConsoleControl);
if (err != EFI_SUCCESS)
/* console control protocol is nonstandard and might not exist. */
return err == EFI_NOT_FOUND ? EFI_SUCCESS : err;
/* check current mode */
err = ConsoleControl->GetMode(ConsoleControl, ¤t, &uga_exists, &stdin_locked);
if (err != EFI_SUCCESS)
return err;
/* do not touch the mode */
new = on ? EfiConsoleControlScreenGraphics : EfiConsoleControlScreenText;
if (new == current)
return EFI_SUCCESS;
log_wait();
err = ConsoleControl->SetMode(ConsoleControl, new);
/* some firmware enables the cursor when switching modes */
ST->ConOut->EnableCursor(ST->ConOut, false);
return err;
}
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