89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/****************************************************************************
|
|
* libs/libnx/nx/nx_fillcircle.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* 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 <sys/types.h>
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/nx/nxglib.h>
|
|
#include <nuttx/nx/nx.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define NCIRCLE_TRAPS 8
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nx_fillcircle
|
|
*
|
|
* Description:
|
|
* Fill a circular region using the specified color.
|
|
*
|
|
* Input Parameters:
|
|
* hwnd - The window handle
|
|
* center - A pointer to the point that is the center of the circle
|
|
* radius - The radius of the circle in pixels.
|
|
* color - The color to use to fill the circle.
|
|
*
|
|
* Returned Value:
|
|
* OK on success; ERROR on failure with errno set appropriately
|
|
*
|
|
****************************************************************************/
|
|
|
|
int nx_fillcircle(NXWINDOW hwnd,
|
|
FAR const struct nxgl_point_s *center,
|
|
nxgl_coord_t radius,
|
|
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
|
|
{
|
|
FAR struct nxgl_trapezoid_s traps[NCIRCLE_TRAPS];
|
|
int i;
|
|
int ret;
|
|
|
|
/* Describe the circular region as a sequence of 8 trapezoids */
|
|
|
|
nxgl_circletraps(center, radius, traps);
|
|
|
|
/* Then rend those trapezoids */
|
|
|
|
for (i = 0; i < NCIRCLE_TRAPS; i++)
|
|
{
|
|
ret = nx_filltrapezoid(hwnd, NULL, &traps[i], color);
|
|
if (ret != OK)
|
|
{
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return OK;
|
|
}
|