nuttx/graphics/nxterm/nxterm_redraw.c

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/****************************************************************************
* nuttx/graphics/nxterm/nxterm_bkgd.c
*
* Copyright (C) 2012 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 <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>
#include "nxterm.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxterm_redraw
*
* Description:
* Re-draw a portion of the NX console. This function should be called
* from the appropriate window callback logic.
*
* Input Parameters:
* handle - A handle previously returned by nx_register, nxtk_register, or
* nxtool_register.
* rect - The rectangle that needs to be re-drawn (in window relative
* coordinates)
* more - true: More re-draw requests will follow
*
* Returned Value:
* None
*
****************************************************************************/
void nxterm_redraw(NXTERM handle, FAR const struct nxgl_rect_s *rect, bool more)
{
FAR struct nxterm_state_s *priv;
int ret;
int i;
DEBUGASSERT(handle && rect);
gvdbg("rect={(%d,%d),(%d,%d)} more=%s\n",
rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
more ? "true" : "false");
/* Recover our private state structure */
priv = (FAR struct nxterm_state_s *)handle;
/* Get exclusive access to the state structure */
do
{
ret = nxterm_semwait(priv);
/* Check for errors */
if (ret < 0)
{
/* The only expected error is if the wait failed because of it
* was interrupted by a signal.
*/
DEBUGASSERT(errno == EINTR);
}
}
while (ret < 0);
/* Fill the rectangular region with the window background color */
ret = priv->ops->fill(priv, rect, priv->wndo.wcolor);
if (ret < 0)
{
gdbg("fill failed: %d\n", errno);
}
/* Then redraw each character on the display (Only the characters within
* the rectangle will actually be redrawn).
*/
for (i = 0; i < priv->nchars; i++)
{
nxterm_fillchar(priv, rect, &priv->bm[i]);
}
(void)nxterm_sempost(priv);
}