2906947c9b
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3911 42af7a65-404d-4744-a932-0658087f49c3
115 lines
4.2 KiB
C
115 lines
4.2 KiB
C
/****************************************************************************
|
|
* graphics/nxmu/nx_fillcircle.c
|
|
*
|
|
* Copyright (C) 2011 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 <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
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* 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.
|
|
*
|
|
* Return:
|
|
* 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;
|
|
}
|