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efi_loader: Set default console colors on efi_cout_clear_screen if needed

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Ensures a consistent background color of the whole screen for succeeding
outputs as both demanded by the spec and implemented in EDK2 as well.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Jan Kiszka 2023-01-18 22:25:00 +01:00 committed by Heinrich Schuchardt
parent 5ef229a007
commit de94f0f320
1 changed files with 6 additions and 0 deletions
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6
lib/efi_loader/efi_console.c
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@ -489,6 +489,12 @@ static efi_status_t EFIAPI efi_cout_clear_screen(
{
EFI_ENTRY("%p", this);
/* Set default colors if not done yet */
if (efi_con_mode.attribute == 0) {
efi_con_mode.attribute = 0x07;
printf(ESC "[0;37;40m");
}
efi_clear_screen();
return EFI_EXIT(EFI_SUCCESS);