incubator-nuttx/libs/libnx/nxmu/nx_setpixel.c

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/****************************************************************************
* libs/libnx/nxmu/nx_setpixel.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 <mqueue.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nx/nxglib.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxbe.h>
#include <nuttx/nx/nxmu.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_setpixel
*
* Description:
* Set a single pixel in the window to the specified color. This is simply
* a degenerate case of nx_fill(), but may be optimized in some
* architectures.
*
* Input Parameters:
* wnd - The window structure reference
* pos - The pixel location to be set
* col - The color to use in the set
*
* Returned Value:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
int nx_setpixel(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
struct nxsvrmsg_setpixel_s outmsg;
#ifdef CONFIG_DEBUG_FEATURES
if (!wnd || !pos || !color)
{
set_errno(EINVAL);
return ERROR;
}
#endif
/* Format the fill command */
outmsg.msgid = NX_SVRMSG_SETPIXEL;
outmsg.wnd = wnd;
outmsg.pos.x = pos->x;
outmsg.pos.y = pos->y;
nxgl_colorcopy(outmsg.color, color);
/* Forward the fill command to the server */
return nxmu_sendwindow(wnd, &outmsg, sizeof(struct nxsvrmsg_setpixel_s));
}