winntgopscreen.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 1,052 行 · 第 1/3 页

WINAPI
WinNtGopThreadWinMain (
  LPVOID    lpParameter
  )
/*++

Routine Description:

  This thread simulates the end of WinMain () aplication. Each Winow nededs
  to process it's events. The messages are dispatched to 
  WinNtGopThreadWindowProc ().

  Be very careful sine WinNtGopThreadWinMain () and WinNtGopThreadWindowProc ()
  are running in a seperate thread. We have to do this to process the events.

Arguments:

  lpParameter - Handle of window to manage.

Returns:

  if a WM_QUIT message is returned exit.

--*/
{
  MSG               Message;
  GOP_PRIVATE_DATA  *Private;
  ATOM              Atom;
  RECT              Rect;

  Private = (GOP_PRIVATE_DATA *) lpParameter;
  ASSERT (NULL != Private);

  //
  // Since each thread has unique private data, save the private data in Thread
  // Local Storage slot. Then the shared global mTlsIndex can be used to get
  // thread specific context.
  //
  Private->WinNtThunk->TlsSetValue (mTlsIndex, Private);

  Private->ThreadId                   = Private->WinNtThunk->GetCurrentThreadId ();

  Private->WindowsClass.cbSize        = sizeof (WNDCLASSEX);
  Private->WindowsClass.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
  Private->WindowsClass.lpfnWndProc   = WinNtGopThreadWindowProc;
  Private->WindowsClass.cbClsExtra    = 0;
  Private->WindowsClass.cbWndExtra    = 0;
  Private->WindowsClass.hInstance     = NULL;
  Private->WindowsClass.hIcon         = Private->WinNtThunk->LoadIcon (NULL, IDI_APPLICATION);
  Private->WindowsClass.hCursor       = Private->WinNtThunk->LoadCursor (NULL, IDC_ARROW);
  Private->WindowsClass.hbrBackground = (HBRUSH) COLOR_WINDOW;
  Private->WindowsClass.lpszMenuName  = NULL;
  Private->WindowsClass.lpszClassName = WIN_NT_GOP_CLASS_NAME;
  Private->WindowsClass.hIconSm       = Private->WinNtThunk->LoadIcon (NULL, IDI_APPLICATION);

  //
  // This call will fail after the first time, but thats O.K. since we only need
  // WIN_NT_GOP_CLASS_NAME to exist to create the window.
  //
  // Note: Multiple instances of this DLL will use the same instance of this
  // Class, including the callback function, unless the Class is unregistered and
  // successfully registered again.
  //
  Atom = Private->WinNtThunk->RegisterClassEx (&Private->WindowsClass);

  //
  // Setting Rect values to allow for the AdjustWindowRect to provide
  // us the correct sizes for the client area when doing the CreateWindowEx
  //
  Rect.top    = 0;
  Rect.bottom = Private->GraphicsOutput.Mode->Info->VerticalResolution;
  Rect.left   = 0;
  Rect.right  = Private->GraphicsOutput.Mode->Info->HorizontalResolution;

  Private->WinNtThunk->AdjustWindowRect (&Rect, WS_OVERLAPPEDWINDOW, 0);

  Private->WindowHandle = Private->WinNtThunk->CreateWindowEx (
                                                0,
                                                WIN_NT_GOP_CLASS_NAME,
                                                Private->WindowName,
                                                WS_OVERLAPPEDWINDOW,
                                                CW_USEDEFAULT,
                                                CW_USEDEFAULT,
                                                Rect.right - Rect.left,
                                                Rect.bottom - Rect.top,
                                                NULL,
                                                NULL,
                                                NULL,
                                                &Private
                                                );

  //
  // The reset of this thread is the standard winows program. We need a sperate
  // thread since we must process the message loop to make windows act like
  // windows.
  //

  Private->WinNtThunk->ShowWindow (Private->WindowHandle, SW_SHOW);
  Private->WinNtThunk->UpdateWindow (Private->WindowHandle);

  //
  // Let the main thread get some work done
  //
  Private->WinNtThunk->ReleaseSemaphore (Private->ThreadInited, 1, NULL);

  //
  // This is the message loop that all Windows programs need.
  //
  while (Private->WinNtThunk->GetMessage (&Message, Private->WindowHandle, 0, 0)) {
    Private->WinNtThunk->TranslateMessage (&Message);
    Private->WinNtThunk->DispatchMessage (&Message);
  }

  return Message.wParam;
}

EFI_STATUS
WinNtGopStartWindow (
  IN  GOP_PRIVATE_DATA    *Private,
  IN  UINT32              HorizontalResolution,
  IN  UINT32              VerticalResolution,
  IN  UINT32              ColorDepth,
  IN  UINT32              RefreshRate
  )
/*++

Routine Description:

  TODO: Add function description

Arguments:

  Private               - TODO: add argument description
  HorizontalResolution  - TODO: add argument description
  VerticalResolution    - TODO: add argument description
  ColorDepth            - TODO: add argument description
  RefreshRate           - TODO: add argument description

Returns:

  TODO: add return values

--*/
{
  EFI_STATUS          Status;
  DWORD               NewThreadId;

  mWinNt  = Private->WinNtThunk;

  //
  // Initialize a Thread Local Storge variable slot. We use TLS to get the
  // correct Private data instance into the windows thread.
  //
  if (mTlsIndex == TLS_OUT_OF_INDEXES) {
    ASSERT (0 == mTlsIndexUseCount);
    mTlsIndex = Private->WinNtThunk->TlsAlloc ();
  }

  //
  // always increase the use count!
  //
  mTlsIndexUseCount++;

  //
  // Register to be notified on exit boot services so we can destroy the window.
  //
  Status = gBS->CreateEvent (
                  EFI_EVENT_SIGNAL_EXIT_BOOT_SERVICES,
                  EFI_TPL_CALLBACK,
                  KillNtGopThread,
                  Private,
                  &mGopScreenExitBootServicesEvent
                  );

  Private->ThreadInited = Private->WinNtThunk->CreateSemaphore (NULL, 0, 1, NULL);
  Private->ThreadHandle = Private->WinNtThunk->CreateThread (
                                                NULL,
                                                0,
                                                WinNtGopThreadWinMain,
                                                (VOID *) Private,
                                                0,
                                                &NewThreadId
                                                );

  //
  // The other thread has entered the windows message loop so we can
  // continue our initialization.
  //
  Private->WinNtThunk->WaitForSingleObject (Private->ThreadInited, INFINITE);
  Private->WinNtThunk->CloseHandle (Private->ThreadInited);

  return Status;
}

EFI_STATUS
WinNtGopConstructor (
  GOP_PRIVATE_DATA    *Private
  )
/*++

Routine Description:

Arguments:

Returns:

  None

--*/
// TODO:    Private - add argument and description to function comment
// TODO:    EFI_SUCCESS - add return value to function comment
{
  EFI_STATUS                             Status;

  Private->ModeData = mGopModeData;

  Private->GraphicsOutput.QueryMode = WinNtGopQuerytMode;
  Private->GraphicsOutput.SetMode = WinNtGopSetMode;
  Private->GraphicsOutput.Blt            = WinNtGopBlt;

  //
  // Allocate buffer for Graphics Output Protocol mode information
  //
  Status = gBS->AllocatePool (
                EfiBootServicesData,
                sizeof (EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE),
                (VOID **) &Private->GraphicsOutput.Mode
                );
  if (EFI_ERROR (Status)) {
    return Status;
  }
  Status = gBS->AllocatePool (
                EfiBootServicesData,
                sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION),
                (VOID **) &Private->GraphicsOutput.Mode->Info
                );
  if (EFI_ERROR (Status)) {
    return Status;
  }
  Private->GraphicsOutput.Mode->MaxMode = sizeof(mGopModeData) / sizeof(GOP_MODE_DATA);
  //
  // Till now, we have no idea about the window size.
  //
  Private->GraphicsOutput.Mode->Mode = GRAPHICS_OUTPUT_INVALIDE_MODE_NUMBER;
  Private->GraphicsOutput.Mode->Info->Version = 0;
  Private->GraphicsOutput.Mode->Info->HorizontalResolution = 0;
  Private->GraphicsOutput.Mode->Info->VerticalResolution = 0;
  Private->GraphicsOutput.Mode->Info->PixelFormat = PixelBlueGreenRedReserved8BitPerColor;
  Private->GraphicsOutput.Mode->SizeOfInfo = sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);
  Private->GraphicsOutput.Mode->FrameBufferBase = (EFI_PHYSICAL_ADDRESS) NULL;
  Private->GraphicsOutput.Mode->FrameBufferSize = 0;

  Private->HardwareNeedsStarting  = TRUE;
  Private->FillLine               = NULL;

  WinNtGopInitializeSimpleTextInForWindow (Private);

  return EFI_SUCCESS;
}

EFI_STATUS
WinNtGopDestructor (
  GOP_PRIVATE_DATA     *Private
  )
/*++

Routine Description:

Arguments:

Returns:

  None

--*/
// TODO:    Private - add argument and description to function comment
// TODO:    EFI_SUCCESS - add return value to function comment
{
  UINT32  UnregisterReturn;

  if (!Private->HardwareNeedsStarting) {
    //
    // BugBug: Shutdown GOP Hardware and any child devices.
    //
    Private->WinNtThunk->SendMessage (Private->WindowHandle, WM_DESTROY, 0, 0);
    Private->WinNtThunk->CloseHandle (Private->ThreadHandle);

    mTlsIndexUseCount--;

    //
    // The callback function for another window could still be called,
    // so we need to make sure there are no more users of mTlsIndex.
    //
    if (0 == mTlsIndexUseCount) {
      ASSERT (TLS_OUT_OF_INDEXES != mTlsIndex);

      Private->WinNtThunk->TlsFree (mTlsIndex);
      mTlsIndex = TLS_OUT_OF_INDEXES;

      UnregisterReturn = Private->WinNtThunk->UnregisterClass (
                                                Private->WindowsClass.lpszClassName,
                                                Private->WindowsClass.hInstance
                                                );
    }

    WinNtGopDestroySimpleTextInForWindow (Private);
  }

  //
  // Free graphics output protocol occupied resource
  //
  if (Private->GraphicsOutput.Mode != NULL) {
    if (Private->GraphicsOutput.Mode->Info != NULL) {
        gBS->FreePool (Private->GraphicsOutput.Mode->Info);
    }
    gBS->FreePool (Private->GraphicsOutput.Mode);
  }

  return EFI_SUCCESS;
}

STATIC
VOID
EFIAPI
KillNtGopThread (
  IN EFI_EVENT  Event,
  IN VOID       *Context
  )
/*++

Routine Description:
  
  This is the GOP screen's callback notification function for exit-boot-services. 
  All we do here is call WinNtGopDestructor().

Arguments:

  Event   - not used
  Context - pointer to the Private structure.

Returns:

  None.

--*/
{
  EFI_STATUS  Status;
  Status = WinNtGopDestructor (Context);
}