summaryrefslogtreecommitdiffstats
path: root/src/boot/efi/graphics.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/boot/efi/graphics.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/boot/efi/graphics.c b/src/boot/efi/graphics.c
new file mode 100644
index 0000000..dc646bc
--- /dev/null
+++ b/src/boot/efi/graphics.c
@@ -0,0 +1,43 @@
+/* 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((EFI_GUID *) EFI_CONSOLE_CONTROL_GUID, 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, &current, &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;
+
+ err =ConsoleControl->SetMode(ConsoleControl, new);
+
+ /* some firmware enables the cursor when switching modes */
+ ST->ConOut->EnableCursor(ST->ConOut, false);
+
+ return err;
+}