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/****************************************************************************
* graphics/nxtk/nxtk_subwindowclip.c
*
* Copyright (C) 2008-2009 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 "nxfe.h"
#include "nxtk_internal.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxtk_subwindowclip
*
* Description:
* We are given a 'src' rectangle in sub-window, relative coordinates
* (i.e., (0,0) is the top left corner of the sub-window). This function
* will (1) clip that src rectangle so that it lies within the sub-window
* bounds, and then (2) move the rectangle to that it is relative to the
* containing window (i.e., (0,0) is the top left corner of the containing
* window).
*
* Input parameters:
* fwnd - The framed window to be used
* dest - The locaton to put the result
* src - The src rectangle in relative sub-window coordinates
* bounds - The subwindow bounds in absolute screen coordinates.
*
* Returned value:
* None
*
****************************************************************************/
void nxtk_subwindowclip(FAR struct nxtk_framedwindow_s *fwnd,
FAR struct nxgl_rect_s *dest,
FAR const struct nxgl_rect_s *src,
FAR const struct nxgl_rect_s *bounds)
{
struct nxgl_rect_s tmp;
/* Temporarily, position the src rectangle in absolute screen coordinates */
nxgl_rectoffset(&tmp, src, bounds->pt1.x, bounds->pt1.y);
/* Clip the src rectangle to lie within the client window region */
nxgl_rectintersect(&tmp, &tmp, bounds);
/* Then move the rectangle so that is relative to the containing window, not the
* client subwindow
*/
nxgl_rectoffset(dest, &tmp, -fwnd->wnd.bounds.pt1.x, -fwnd->wnd.bounds.pt1.y);
}
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