/****************************************************************************
* graphics/nxbe/nxbe_redraw.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <stdbool.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nxglib.h>
#include "nxbe.h"
#include "nxfe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct nxbe_visible_s
{
struct nxbe_clipops_s cops;
bool visible;
};
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_clipvisible
****************************************************************************/
static void nxbe_clipvisible(FAR struct nxbe_clipops_s *cops,
FAR struct nxbe_plane_s *plane,
FAR const struct nxgl_rect_s *rect)
{
FAR struct nxbe_visible_s *info = (FAR struct nxbe_visible_s *)cops;
info->visible = true;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_visible
*
* Descripton:
* Return true if the point, pt, in window wnd is visible. pt is in
* absolute screen coordinates
*
****************************************************************************/
bool nxbe_visible(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_point_s *pos)
{
struct nxbe_visible_s info;
/* Check if the absolute position lies within the window */
if (!nxgl_rectinside(&wnd->bounds, pos))
{
return false;
}
/* If this is the top window, then the psition is visible */
if (!wnd->above)
{
return true;
}
/* The position within the window range, but the window is not at
* the top. We will have to work harder to determine if the point
* visible
*/
info.cops.visible = nxbe_clipvisible;
info.cops.obscured = nxbe_clipnull;
info.visible = false;
nxbe_clipper(wnd->above, &wnd->bounds, NX_CLIPORDER_DEFAULT,
&info.cops, &wnd->be->plane[0]);
return info.visible;
}
