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#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Protocol/GraphicsOutput.h>
STATIC
EFI_GRAPHICS_OUTPUT_PROTOCOL *
GetGraphicsOutputProtocol (
VOID
)
{
EFI_STATUS Status;
EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *ModeInfo;
UINTN SizeOfInfo;
Status = gBS->LocateProtocol (
&gEfiGraphicsOutputProtocolGuid,
NULL,
(VOID **)&Gop
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to locate GOP\n"));
return NULL;
}
Status = Gop->QueryMode (
Gop,
(Gop->Mode == NULL) ? 0 : Gop->Mode->Mode,
&SizeOfInfo,
&ModeInfo
);
if (Status == EFI_NOT_STARTED) {
Status = Gop->SetMode (Gop, 0);
}
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to get native mode\n"));
return NULL;
}
// TODO: free ModeInfo
return Gop;
}
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop;
Gop = GetGraphicsOutputProtocol ();
if (Gop == NULL) {
Print (L"Error: Getting a Graphical Output Protocol is failed\n");
return EFI_NOT_FOUND;
}
return EFI_SUCCESS;
}
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