UEFI - 修改屏幕分辨率

设置分辨率会用到以下Protocol:

EFI_STATUS
EFIAPI
MainEntryPoint (
    IN EFI_HANDLE                     ImageHandle,
    IN EFI_SYSTEM_TABLE               *SystemTable )
{
    EFI_STATUS                Status;
    UINT32  i;
    UINTN   SizeOfInfo;
    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION    *pModeInfo;
    EFI_GRAPHICS_OUTPUT_PROTOCOL *gGOP;

    //获取Protocol找到实例
    Status = gBS->LocateProtocol (
                                   &gEfiGraphicsOutputProtocolGuid, 
                                   NULL,
                                   (VOID **) &gGOP);
    if (EFI_ERROR(Status)) {
        return Status;
    }
    
    //清屏
    gST->ConOut->ClearScreen( gST->ConOut);

    for(i=0;i<gGOP->Mode->MaxMode;i++)
    {
        //获取图形设备可使用的图形模式信息
        Status = gGOP->QueryMode(gGOP,i,&SizeOfInfo,&pModeInfo);
        if((EFI_SUCCESS == Status) && SizeOfInfo)
        {
            //自定义分辨率
            if((1366 == pModeInfo->HorizontalResolution) &&
               (768 == pModeInfo->VerticalResolution))
            {
                Status = gGOP->SetMode(gGOP,i);
                return Status;
            }
        }
    }
    
    return EFI_SUCCESS;