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MdeModulePkg/BootLogoLib: scale logos on HiDPI screens

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Signed-off-by: Sean Rhodes <sean@starlabs.systems>
This commit is contained in:
Sean Rhodes 2026-05-27 21:32:23 +01:00
parent 8c89153dd2
commit fa5e1db999
2 changed files with 103 additions and 2 deletions
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104
MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
View file

@ -18,10 +18,93 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#define BOOT_LOGO_HIDPI_HORIZONTAL_RESOLUTION 1920
#define BOOT_LOGO_HIDPI_VERTICAL_RESOLUTION 1080
STATIC
BOOLEAN
ShouldScaleBootLogoForHiDpi (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput
)
{
UINT32 HorizontalResolution;
UINT32 VerticalResolution;
if ((GraphicsOutput == NULL) ||
(GraphicsOutput->Mode == NULL) ||
(GraphicsOutput->Mode->Info == NULL) ||
(GraphicsOutput->Mode->FrameBufferBase == 0))
{
return FALSE;
}
HorizontalResolution = GraphicsOutput->Mode->Info->HorizontalResolution;
VerticalResolution = GraphicsOutput->Mode->Info->VerticalResolution;
return (HorizontalResolution > BOOT_LOGO_HIDPI_HORIZONTAL_RESOLUTION) &&
(VerticalResolution > BOOT_LOGO_HIDPI_VERTICAL_RESOLUTION) &&
((HorizontalResolution % 2) == 0) &&
((VerticalResolution % 2) == 0);
}
STATIC
EFI_STATUS
ScaleLogoBlt2x (
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Source,
IN UINTN SourceWidth,
IN UINTN SourceHeight,
OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL **Destination
)
{
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *ScaledBitmap;
UINTN DestinationWidth;
UINTN Row;
UINTN Column;
if ((Source == NULL) || (Destination == NULL) || (SourceWidth == 0) || (SourceHeight == 0)) {
return EFI_INVALID_PARAMETER;
}
if ((SourceWidth > (MAX_UINTN / 2)) || (SourceHeight > (MAX_UINTN / 2))) {
return EFI_OUT_OF_RESOURCES;
}
DestinationWidth = SourceWidth * 2;
if (DestinationWidth > (MAX_UINTN / (SourceHeight * 2) / sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL))) {
return EFI_OUT_OF_RESOURCES;
}
ScaledBitmap = AllocateZeroPool (DestinationWidth * (SourceHeight * 2) * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
if (ScaledBitmap == NULL) {
return EFI_OUT_OF_RESOURCES;
}
for (Row = 0; Row < SourceHeight; Row++) {
UINTN DestinationRow0;
UINTN DestinationRow1;
DestinationRow0 = (Row * 2) * DestinationWidth;
DestinationRow1 = DestinationRow0 + DestinationWidth;
for (Column = 0; Column < SourceWidth; Column++) {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL Pixel;
UINTN DestinationColumn;
Pixel = Source[Row * SourceWidth + Column];
DestinationColumn = Column * 2;
ScaledBitmap[DestinationRow0 + DestinationColumn] = Pixel;
ScaledBitmap[DestinationRow0 + DestinationColumn + 1] = Pixel;
ScaledBitmap[DestinationRow1 + DestinationColumn] = Pixel;
ScaledBitmap[DestinationRow1 + DestinationColumn + 1] = Pixel;
}
}
*Destination = ScaledBitmap;
return EFI_SUCCESS;
}
/**
Show LOGO returned from Edkii Platform Logo protocol on all consoles.
@ -129,6 +212,25 @@ BootLogoEnableLogo (
Blt = Image.Bitmap;
if (ShouldScaleBootLogoForHiDpi (GraphicsOutput)) {
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *ScaledBlt;
ScaledBlt = NULL;
Status = ScaleLogoBlt2x (Blt, Image.Width, Image.Height, &ScaledBlt);
if (!EFI_ERROR (Status)) {
FreePool (Blt);
Blt = ScaledBlt;
Image.Bitmap = ScaledBlt;
Image.Width *= 2;
Image.Height *= 2;
OffsetX *= 2;
OffsetY *= 2;
} else {
DEBUG ((DEBUG_INFO, "%a: failed to scale logo for HiDPI boot GOP: %r\n", __func__, Status));
Status = EFI_SUCCESS;
}
}
//
// Calculate the display position according to Attribute.
//

1
MdeModulePkg/Library/BootLogoLib/BootLogoLib.inf
View file

@ -38,7 +38,6 @@
BaseMemoryLib
DebugLib
PrintLib
PcdLib
[Protocols]
gEfiGraphicsOutputProtocolGuid ## SOMETIMES_CONSUMES