px4-firmware/nuttx/graphics/nxbe/nxbe_getrectangle.c

/****************************************************************************
 * graphics/nxbe/nxbe_fill.c
 *
 *   Copyright (C) 2011 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 <errno.h>
#include <debug.h>

#include <nuttx/nx/nxglib.h>

#include "nxbe.h"

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Types
 ****************************************************************************/

struct nxbe_fill_s
{
  struct nxbe_clipops_s cops;
  nxgl_mxpixel_t color;
};

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nxbe_getrectangle
 *
 * Description:
 *  Get the raw contents of graphic memory within a rectangular region. NOTE:
 *  Since raw graphic memory is returned, the returned memory content may be
 *  the memory of windows above this one and may not necessarily belong to
 *  this window unless you assure that this is the top window.
 *
 * Input Parameters:
 *   wnd  - The window structure reference
 *   rect - The location to be copied
 *   plane - Specifies the color plane to get from.
 *   dest - The location to copy the memory region
 *   deststride - The width, in bytes, the the dest memory
 *
 * Return:
 *   None
 *
 ****************************************************************************/

void nxbe_getrectangle(FAR struct nxbe_window_s *wnd,
                       FAR const struct nxgl_rect_s *rect, unsigned int plane,
                       FAR uint8_t *dest, unsigned int deststride)
{
  struct nxgl_rect_s remaining;

#ifdef CONFIG_DEBUG
  if (!wnd || !rect || ! rect || plane >= wnd->be->vinfo.nplanes)
    {
      gvdbg("Invalid parameters\n");
      return;
    }
#endif

  /* Offset the rectangle by the window origin to convert it into a
   * bounding box
   */

  nxgl_rectoffset(&remaining, rect, wnd->bounds.pt1.x, wnd->bounds.pt1.y);

  /* Clip to the bounding box to the limits of the window and of the
   * background screen
   */

  nxgl_rectintersect(&remaining, &remaining, &wnd->bounds);
  nxgl_rectintersect(&remaining, &remaining, &wnd->be->bkgd.bounds);

  /* The return the graphics memory at this location.  NOTE: Since raw
   * graphic memory is returned, the returned memory content may be
   * the memory of windows above this one and may not necessarily belong
   * to this window.
   */

  if (!nxgl_nullrect(&remaining))
    {
      FAR struct nxbe_plane_s *pplane = &wnd->be->plane[plane];
      pplane->getrectangle(&pplane->pinfo, &remaining, dest, deststride);
    }
}