incubator-nuttx/graphics/nxbe/nxbe_cursor_backupdraw.c

/****************************************************************************
 * graphics/nxbe/nxbe_cursor_backupdraw.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 <assert.h>

#include "nxglib.h"
#include "nxbe.h"

#ifdef CONFIG_NX_SWCURSOR

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

/****************************************************************************
 * Name: _nxbe_cursor_backupdraw_dev
 *
 * Description:
 *   Called after any modification to the display to backup and redraw one
 *   color plane
 *
 * Input Parameters:
 *   be    - The back-end state structure instance
 *   rect  - The modified region of the display, in device coordinates
 *   plane - The plane number to use.
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

static inline void _nxbe_cursor_backupdraw_dev(
                            FAR struct nxbe_state_s *be,
                            FAR const struct nxgl_rect_s *rect,
                            int plane)
{
  /* Save the modified cursor background region. */

  be->plane[plane].cursor.backup(be, rect, plane);

  /* Restore the software cursor in the region that was modified. */

  be->plane[plane].cursor.draw(be, rect, plane);
}

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

/****************************************************************************
 * Name: nxbe_cursor_backupdraw
 *
 * Description:
 *   Called after any modification to the display (in window coordinate
 *   frame) to perform the backup-draw operation on one color plane.
 *
 * Input Parameters:
 *   be    - The back-end state structure instance, or
 *   wnd   - Window state structure
 *   rect  - The modified region of the window, in windows coordinates
 *   plane - The plane number to use.
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

void nxbe_cursor_backupdraw_dev(FAR struct nxbe_state_s *be,
                                FAR const struct nxgl_rect_s *rect,
                                int plane)
{
  struct nxgl_rect_s bounds;

  /* Update the software cursor if it is visible */

  if (be->cursor.visible)
    {
      /* Clip to the limits of the display */

      nxgl_rectintersect(&bounds, rect, &be->bkgd.bounds);
      if (!nxgl_nullrect(&bounds))
        {
          _nxbe_cursor_backupdraw_dev(be, &bounds, plane);
        }
    }
}

void nxbe_cursor_backupdraw(FAR struct nxbe_window_s *wnd,
                            FAR const struct nxgl_rect_s *rect,
                            int plane)
{
  struct nxgl_rect_s bounds;

  /* Update the software cursor if it is visible */

  if (wnd->be->cursor.visible)
    {
      /* Offset the rectangle to convert to device coordinates */

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

      /* Clip to the limits of the window */

      nxgl_rectintersect(&bounds, &bounds, &wnd->bounds);

      /* Let nxbe_cursor_backupdraw_dev() do the rest */

      nxbe_cursor_backupdraw_dev(wnd->be, &bounds, plane);
    }
}

/****************************************************************************
 * Name: nxbe_cursor_backupdraw_all and nxbe_cursor_backupdraw_devall
 *
 * Description:
 *   Called after any modification to the display to perform the backup-draw
 *   operation on all color planes.
 *
 * Input Parameters:
 *   be    - The back-end state structure instance, or
 *   wnd   - Window state structure
 *   rect  - The modified region of the window.  In windows coordinates for
 *           nxbe_cursor_backupdraw(); in graphics device coordinates for
 *           nxbe_cursor_backupdraw_dev().
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

void nxbe_cursor_backupdraw_devall(FAR struct nxbe_state_s *be,
                                   FAR const struct nxgl_rect_s *rect)
{
#if CONFIG_NX_NPLANES > 1
  struct nxgl_rect_s bounds;
  int plane;

  /* Update the software cursor if it is visible */

  if (be->cursor.visible)
    {
      /* Clip to the limits of the display */

      nxgl_rectintersect(&bounds, &bounds, &be->bkgd.bounds);
      if (!nxgl_nullrect(&bounds))
        {
          /* Perform the backup-draw operation on all color planes */

          for (plane = 0; plane < CONFIG_NX_NPLANES; plane++)
            {
              _nxbe_cursor_backupdraw_dev(be, &bounds, plane);
            }
        }
    }
#else
  nxbe_cursor_backupdraw_dev(be, rect, 0);
#endif
}

void nxbe_cursor_backupdraw_all(FAR struct nxbe_window_s *wnd,
                                FAR const struct nxgl_rect_s *rect)
{
#if CONFIG_NX_NPLANES > 1
  struct nxgl_rect_s bounds;

  /* Update the software cursor if it is visible */

  if (wnd->be->cursor.visible)
    {
      /* Offset the rectangle to convert it to device coordinates */

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

      /* Clip to the limits of the window */

      nxgl_rectintersect(&bounds, &bounds, &wnd->bounds);

      /* And then let nxbe_cursor_backupdraw_devall() do the rest */

      nxbe_cursor_backupdraw_all(wnd, &bounds);
    }
#else
  nxbe_cursor_backupdraw(wnd, rect, 0);
#endif
}

#endif /* CONFIG_NX_SWCURSOR */