[PATCH RFC 4/6] efi_selftest: Add international characters test

[Janne Grunau via B4 Relay]

From: Andre Przywara <andre.przywara at arm.com>

UEFI relies entirely on unicode output, which actual fonts displayed on
the screen might not be ready for.

Add a test displaying some international characters, to reveal missing
glyphs, especially in our builtin fonts.
This would be needed to be manually checked on the screen for
correctness.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Suggested-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
Signed-off-by: Janne Grunau <j at jannau.net>
---
 lib/efi_selftest/efi_selftest_textoutput.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/efi_selftest/efi_selftest_textoutput.c b/lib/efi_selftest/efi_selftest_textoutput.c
index cc44b38bc2..2aa81b0a80 100644
--- a/lib/efi_selftest/efi_selftest_textoutput.c
+++ b/lib/efi_selftest/efi_selftest_textoutput.c
@@ -30,6 +30,9 @@ static int execute(void)
 		0xD804, 0xDC05,
 		0xD804, 0xDC22,
 		0};
+	const u16 text[] =
+u"\u00d6sterreich Edelwei\u00df Sm\u00f8rrebr\u00f8d Sm\u00f6rg"
+u"\u00e5s Ni\u00f1o Ren\u00e9 >\u1f19\u03bb\u03bb\u03ac\u03c2<\n";
 
 	/* SetAttribute */
 	efi_st_printf("\nColor palette\n");
@@ -118,6 +121,11 @@ static int execute(void)
 		efi_st_printf("Unicode not handled properly\n");
 		return EFI_ST_FAILURE;
 	}
+	ret = con_out->output_string(con_out, text);
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for international chars\n");
+		return EFI_ST_FAILURE;
+	}
 	efi_st_printf("\n");
 
 	return EFI_ST_SUCCESS;

-- 
2.43.0