The logic I shared below is from the LogoDxe driver which produces EDKII_PLATFORM_LOGO_PROTOCOL.
This driver should know the image size and it can account for the image size.
Thanks,
Ray
From: Sean Rhodes <sean@starlabs.systems>
Sent: Monday, October 10, 2022 4:51 PM
To: Ni, Ray <ray.ni@intel.com>
Cc: devel@edk2.groups.io; Gao, Zhichao <zhichao.gao@intel.com>; Wang, Jian J <jian.j.wang@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>
Subject: Re: [PATCH 2/3] MdeModulePkg/Logo: Add a PCD to control the position of the Logo
Hi Ray
Thank you, it does, and I think it will work for most splash images. However, the way it's written in my patch accounts for the Image size. This will handle splash images that are equal
to, or larger than the resolution of the display.
Thanks
Sean
On Sat, 8 Oct 2022 at 03:02, Ni, Ray <ray.ni@intel.com> wrote:
Sean,
I remember that I evaluated the BGRT requirement when designing the PlatformLogo protocol.
So, I went back to got the code I wrote long time ago as below.
I didn't try to understand them now. Does it make sense to you?
Status = gBS->HandleProtocol (gST->ConsoleOutHandle, &gEfiGraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
if (!EFI_ERROR (Status)) {
//
// Center of LOGO is in the vertical position 38.2% when PcdBootLogoOnlyEnable is TRUE
// Y = (VerticalResolution - LogoHeight) / 2
// Y' = VerticalResolution * 0.382 - LogoHeight * 0.5
// OffsetY + Y = Y'
// OffsetY = Y' - Y = -0.118 * VerticalResolution
//
*Attribute = EdkiiPlatformLogoDisplayAttributeCenter;
*OffsetX = 0;
*OffsetY = -118 * (INTN) GraphicsOutput->Mode->Info->VerticalResolution / 1000;
}
Thanks,
Ray
> -----Original Message-----
> From: Sean Rhodes <sean@starlabs.systems>
> Sent: Monday, September 26, 2022 4:10 PM
> To: devel@edk2.groups.io
> Cc: Rhodes, Sean <sean@starlabs.systems>; Gao, Zhichao
> <zhichao.gao@intel.com>; Ni, Ray <ray.ni@intel.com>; Wang, Jian J
> <jian.j.wang@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>
> Subject: [PATCH 2/3] MdeModulePkg/Logo: Add a PCD to control the
> position of the Logo
>
> When set to true, the Logo is positioned according to the BGRT
> specification, 38.2% from the top of the screen. When set to false,
> no behaviour is changed and the logo is positioned centrally.
>
> Cc: Zhichao Gao <zhichao.gao@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Signed-off-by: Sean Rhodes <sean@starlabs.systems>
> ---
> MdeModulePkg/Logo/Logo.c | 5 +++++
> MdeModulePkg/Logo/LogoDxe.inf | 4 ++++
> MdeModulePkg/MdeModulePkg.dec | 6 ++++++
> MdeModulePkg/MdeModulePkg.uni | 6 ++++++
> 4 files changed, 21 insertions(+)
>
> diff --git a/MdeModulePkg/Logo/Logo.c b/MdeModulePkg/Logo/Logo.c
> index 8ab874d2da..1638d0f984 100644
> --- a/MdeModulePkg/Logo/Logo.c
> +++ b/MdeModulePkg/Logo/Logo.c
> @@ -13,6 +13,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> #include <Protocol/HiiPackageList.h>
>
> #include <Library/UefiBootServicesTableLib.h>
>
> #include <Library/DebugLib.h>
>
> +#include <Library/PcdLib.h>
>
>
>
> typedef struct {
>
> EFI_IMAGE_ID ImageId;
>
> @@ -69,6 +70,10 @@ GetImage (
> return EFI_NOT_FOUND;
>
> }
>
>
>
> + if (FixedPcdGetBool (PcdFollowMicrosoftRecommended)) {
>
> + mLogos[Current].Attribute =
> EdkiiPlatformLogoDisplayAttributeMicrosoftRecommended;
>
> + }
>
> +
>
> (*Instance)++;
>
> *Attribute = mLogos[Current].Attribute;
>
> *OffsetX = mLogos[Current].OffsetX;
>
> diff --git a/MdeModulePkg/Logo/LogoDxe.inf
> b/MdeModulePkg/Logo/LogoDxe.inf
> index 41215d25d8..ce29950089 100644
> --- a/MdeModulePkg/Logo/LogoDxe.inf
> +++ b/MdeModulePkg/Logo/LogoDxe.inf
> @@ -41,6 +41,7 @@
> UefiBootServicesTableLib
>
> UefiDriverEntryPoint
>
> DebugLib
>
> + PcdLib
>
>
>
> [Protocols]
>
> gEfiHiiDatabaseProtocolGuid ## CONSUMES
>
> @@ -48,6 +49,9 @@
> gEfiHiiPackageListProtocolGuid ## PRODUCES CONSUMES
>
> gEdkiiPlatformLogoProtocolGuid ## PRODUCES
>
>
>
> +[Pcd]
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdFollowMicrosoftRecommended
> ## CONSUMES
>
> +
>
> [Depex]
>
> gEfiHiiDatabaseProtocolGuid AND
>
> gEfiHiiImageExProtocolGuid
>
> diff --git a/MdeModulePkg/MdeModulePkg.dec
> b/MdeModulePkg/MdeModulePkg.dec
> index 58e6ab0048..ac437990f1 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -2102,6 +2102,12 @@
> # @Prompt The shared bit mask when Intel Tdx is enabled.
>
>
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0|UINT64|0x
> 10000025
>
>
>
> + ## This PCD sets the position of the Boot Logo.
>
> + # TRUE - The Logo is positioned following the recommendations from
> Microsoft.
>
> + # FALSE - The logo is positioned in the center of the screen.
>
> + # @ Prompt This position of the boot logo
>
> +
> gEfiMdeModulePkgTokenSpaceGuid.PcdFollowMicrosoftRecommended|FA
> LSE|BOOLEAN|0x10000026
>
> +
>
> [PcdsPatchableInModule]
>
> ## Specify memory size with page number for PEI code when
>
> # Loading Module at Fixed Address feature is enabled.
>
> diff --git a/MdeModulePkg/MdeModulePkg.uni
> b/MdeModulePkg/MdeModulePkg.uni
> index 33ce9f6198..09c1ac1cc1 100644
> --- a/MdeModulePkg/MdeModulePkg.uni
> +++ b/MdeModulePkg/MdeModulePkg.uni
> @@ -1338,3 +1338,9 @@
> #string
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdPcieResizableBarSupport_HEL
> P #language en-US "Indicates if the PCIe Resizable BAR Capability
> Supported.<BR><BR>\n"
>
> "TRUE - PCIe Resizable BAR
> Capability is supported.<BR>\n"
>
> "FALSE - PCIe Resizable BAR
> Capability is not supported.<BR>"
>
> +
>
> +#string
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdFollowMicrosoftRecommende
> d_PROMPT #language en-US "The position of the Boot Logo"
>
> +
>
> +#string
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdFollowMicrosoftRecommend_
> HELP #language en-US "Sets the position of the Logo. When set to true, the
> Logo is positioned following the recommendations"
>
> + " from Microsoft, 38.2% from
> the top of the screen."
>
> +
>
> --
> 2.34.1