text: /****************************************************************************
   * nuttx/graphics/nxterm/nxterm_redraw.c
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <assert.h>
  #include <errno.h>
  #include <debug.h>
  
  #include <nuttx/nx/nx.h>
  #include <nuttx/nx/nxglib.h>
  
  #include "nxterm.h"
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: nxterm_redraw
   *
   * Description:
   *   Re-draw a portion of the NX console.  This function should be called
   *   from the appropriate window callback logic.
   *
   * Input Parameters:
   *   handle - A handle previously returned by nx_register, nxtk_register, or
   *     nxtool_register.
   *   rect - The rectangle that needs to be re-drawn (in window relative
   *          coordinates)
   *   more - true:  More re-draw requests will follow
   *
   * Returned Value:
   *   None
   *
   ****************************************************************************/
  
  void nxterm_redraw(NXTERM handle,
                     FAR const struct nxgl_rect_s *rect,
                     bool more)
  {
    FAR struct nxterm_state_s *priv;
    int ret;
    int i;
  
    DEBUGASSERT(handle && rect);
    ginfo("rect={(%d,%d),(%d,%d)} more=%s\n",
          rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
          more ? "true" : "false");
  
    /* Recover our private state structure */
  
    priv = (FAR struct nxterm_state_s *)handle;
  
    /* Get exclusive access to the state structure */
  
    do
      {
        ret = nxterm_semwait(priv);
      }
    while (ret < 0);
  
    /* Fill the rectangular region with the window background color */
  
    ret = priv->ops->fill(priv, rect, priv->wndo.wcolor);
    if (ret < 0)
      {
        gerr("ERROR: fill failed: %d\n", get_errno());
      }
  
    /* Then redraw each character on the display (Only the characters within
     * the rectangle will actually be redrawn).
     */
  
    for (i = 0; i < priv->nchars; i++)
      {
        nxterm_fillchar(priv, rect, &priv->bm[i]);
      }
  
    nxterm_sempost(priv);
  }
  