C++ (Cpp) DS_IS_CLOSED Examples

Example #1

File: tw_func.c Project: Minoos/gimp

/*
 * closeDS
 *
 * Close the datasource associated with the
 * specified session.
 */
int
closeDS(pTW_SESSION twSession)
{
  /* Can't close a closed data source */
  if (DS_IS_CLOSED(twSession)) {
    LogMessage("closeDS: Data source already closed\n");
    return TRUE;
  }

  /* Open the TWAIN datasource */
  twSession->twRC = callDSM(APP_IDENTITY(twSession), NULL,
			    DG_CONTROL, DAT_IDENTITY, MSG_CLOSEDS,
			    (TW_MEMREF) DS_IDENTITY(twSession));

  /* Check the return to determine what the user decided
   * to do.
	 */
  switch (twSession->twRC) {
  case TWRC_SUCCESS:
    /* We are now in TWAIN state 3 */
    twSession->twainState = 3;
    LogMessage("Data source %s closed\n", DS_IDENTITY(twSession)->ProductName);
    return TRUE;
    break;

  default:
    LogMessage("Error \"%s\" closing data source\n", currentTwainError(twSession));
    break;
  }

  return FALSE;
}

Example #2

File: tw_func.c Project: Minoos/gimp

/*
 * setBufferedXfer
 */
static int
setBufferedXfer(pTW_SESSION twSession)
{
  TW_CAPABILITY bufXfer;
  pTW_ONEVALUE pvalOneValue;

  /* Make sure the data source is open first */
  if (DS_IS_CLOSED(twSession))
    return FALSE;

  /* Create the capability information */
  bufXfer.Cap = ICAP_XFERMECH;
  bufXfer.ConType = TWON_ONEVALUE;
  bufXfer.hContainer = twainAllocHandle(sizeof(TW_ONEVALUE));

  pvalOneValue = (pTW_ONEVALUE) twainLockHandle(bufXfer.hContainer);
  pvalOneValue->ItemType = TWTY_UINT16;
  pvalOneValue->Item = TWSX_MEMORY;
  twainUnlockHandle(bufXfer.hContainer);

  /* Make the call to the source manager */
  twSession->twRC = callDSM(APP_IDENTITY(twSession), DS_IDENTITY(twSession),
			    DG_CONTROL, DAT_CAPABILITY, MSG_SET,
			    (TW_MEMREF) &bufXfer);

  /* Free the container */
  twainFreeHandle(bufXfer.hContainer);

  /* Let the caller know what happened */
  return (twSession->twRC==TWRC_SUCCESS);
}

Example #3

File: tw_win.c Project: AdamGrzonkowski/gimp-1

/*
 * twainMessageLoop
 *
 * Process Win32 window messages and provide special handling
 * of TWAIN specific messages.  This loop will not exit until
 * the application exits.
 */
int
twainMessageLoop(pTW_SESSION twSession)
{
  MSG msg;

  while (GetMessage(&msg, NULL, 0, 0)) {
    if (DS_IS_CLOSED(twSession) || !TwainProcessMessage(&msg, twSession)) {
      TranslateMessage((LPMSG)&msg);
      DispatchMessage(&msg);
    }
  }

  return msg.wParam;
}

Example #4

File: tw_func.c Project: Minoos/gimp

/*
 * requestImageAcquire
 *
 * Request that the acquire user interface
 * be displayed.  This may or may not cause
 * an image to actually be transferred.
 */
int
requestImageAcquire(pTW_SESSION twSession, gboolean showUI)
{
  /* Make sure in the correct state */
  if (DS_IS_CLOSED(twSession)) {
    LogMessage("Can't acquire image with closed datasource\n");
    return FALSE;
  }

  twainSetupCallback(twSession);

  /* Set the transfer mode */
  if (setBufferedXfer(twSession)) {
    TW_USERINTERFACE ui;

    /* Set the UI information */
    ui.ShowUI = TRUE;
    ui.ModalUI = TRUE;
    /* In Windows, the callbacks are sent to the window message handler */
    ui.hParent = twSession->hwnd;

    /* Make the call to the source manager */
    twSession->twRC = callDSM(APP_IDENTITY(twSession), DS_IDENTITY(twSession),
			      DG_CONTROL, DAT_USERINTERFACE, MSG_ENABLEDS,
			      (TW_MEMREF) &ui);

    if (twSession->twRC == TWRC_SUCCESS) {
      /* We are now at a new twain state */
      twSession->twainState = 5;

      return TRUE;
    } else {
      LogMessage("Error during data source enable\n");
      return FALSE;
    }
  } else {
    LogMessage("Unable to set buffered transfer mode: %s\n",
	       currentTwainError(twSession));
    return FALSE;
  }
}