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efi_loader: correctly support parameter delta in Blt

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In the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL the parameter delta
is measured in bytes and not in pixels.

The coding only supports delta being a multiple of four. The UEFI
specification does not explicitly require this but as pixels have a size of
four bytes we should be able to assume four byte alignment.

The corresponding unit test is corrected, too. It can be launched with

	setenv efi_selftest block image transfer
	bootefi selftest

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt
2018-03-14 19:57:02 +01:00
committed by Alexander Graf
parent 6fc901c538
commit 51a0f45122
2 changed files with 29 additions and 7 deletions
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4
lib/efi_selftest/efi_selftest_bitblt.c
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@@ -87,7 +87,7 @@ static void EFIAPI notify(struct efi_event *event, void *context)
/* Copy image to video */
gop->blt(gop, bitmap, EFI_BLT_BUFFER_TO_VIDEO, sx, 0, dx, DEPTH,
width, HEIGHT, WIDTH);
width, HEIGHT, WIDTH * sizeof(struct efi_gop_pixel));
}
/*
@@ -276,7 +276,7 @@ static int execute(void)
/* Copy port holes back to buffer */
ret = gop->blt(gop, bitmap, EFI_BLT_VIDEO_TO_BLT_BUFFER,
94, 57 + DEPTH, 94, 57,
90, 26, WIDTH);
90, 26, WIDTH * sizeof(struct efi_gop_pixel));
if (ret != EFI_SUCCESS) {
efi_st_error("EFI_BLT_VIDEO_TO_BLT_BUFFER failed\n");
return EFI_ST_FAILURE;