text: /****************************************************************************
   * libnx/nxtk/nxtk_filltrapwindow.c
   *
   *   Copyright (C) 2008-2009, 2013 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdlib.h>
  #include <errno.h>
  #include <debug.h>
  
  #include <nuttx/nx/nx.h>
  #include <nuttx/nx/nxtk.h>
  
  #include "nxtk_internal.h"
  
  /****************************************************************************
   * Pre-Processor Definitions
   ****************************************************************************/
  
  /****************************************************************************
   * Private Types
   ****************************************************************************/
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /****************************************************************************
   * Public Data
   ****************************************************************************/
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: nxtk_filltrapwindow
   *
   * Description:
   *  Fill the specified rectangle in the client window with the specified color
   *
   * Input Parameters:
   *   hfwnd - The window handle returned by nxtk_openwindow
   *   trap  - The trapezoidal region to be filled
   *   color - The color to use in the fill
   *
   * Return:
   *   OK on success; ERROR on failure with errno set appropriately
   *
   ****************************************************************************/
  
  int nxtk_filltrapwindow(NXTKWINDOW hfwnd,
                          FAR const struct nxgl_trapezoid_s *trap,
                          nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
  {
    FAR struct nxtk_framedwindow_s *fwnd = (FAR struct nxtk_framedwindow_s *)hfwnd;
    struct nxgl_rect_s relclip;
    struct nxgl_trapezoid_s reltrap;
  
  #ifdef CONFIG_DEBUG
    if (!hfwnd || !trap || !color)
      {
        set_errno(EINVAL);
        return ERROR;
      }
  #endif
  
    /* Move the trapezoid from window contents area to window area */
  
    nxgl_trapoffset(&reltrap, trap,
                    fwnd->fwrect.pt1.x - fwnd->wnd.bounds.pt1.x,
                    fwnd->fwrect.pt1.y - fwnd->wnd.bounds.pt1.y);
  
    /* Perform the fill, clipping to the client window */
  
    nxgl_rectoffset(&relclip, &fwnd->fwrect, -fwnd->wnd.bounds.pt1.x,
                    -fwnd->wnd.bounds.pt1.y);
  
    return nx_filltrapezoid((NXWINDOW)hfwnd, &relclip, &reltrap, color);
  }
  