146 lines
5.3 KiB
C
146 lines
5.3 KiB
C
/****************************************************************************
|
|
* libnx/nxtk/nxtk_drawcirclewindow.c
|
|
*
|
|
* Copyright (C) 2011 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 <sys/types.h>
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/nx/nxglib.h>
|
|
#include <nuttx/nx/nxtk.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-Processor Definitions
|
|
****************************************************************************/
|
|
/* Named indices into the 16 circle points generated by nxgl_circlepts */
|
|
|
|
#define POINT_0p0 0
|
|
#define POINT_22p5 1
|
|
#define POINT_45p0 2
|
|
#define POINT_67p5 3
|
|
#define POINT_90p0 4
|
|
#define POINT_112p5 5
|
|
#define POINT_135p0 6
|
|
#define POINT_157p5 7
|
|
#define POINT_180p0 8
|
|
#define POINT_202p5 9
|
|
#define POINT_225p0 10
|
|
#define POINT_247p5 11
|
|
#define POINT_270p0 12
|
|
#define POINT_292p5 13
|
|
#define POINT_315p0 14
|
|
#define POINT_337p5 15
|
|
#define NCIRCLE_POINTS 16
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nxtk_drawcirclewindow
|
|
*
|
|
* Description:
|
|
* Draw a circular outline using the specified line thickness and color.
|
|
*
|
|
* Input Parameters:
|
|
* hfwnd - The window handle returned by nxtk_openwindow()
|
|
* center - A pointer to the point that is the center of the circle
|
|
* radius - The radius of the circle in pixels.
|
|
* width - The width of the line
|
|
* color - The color to use to fill the line
|
|
*
|
|
* Return:
|
|
* OK on success; ERROR on failure with errno set appropriately
|
|
*
|
|
****************************************************************************/
|
|
|
|
int nxtk_drawcirclewindow(NXTKWINDOW hfwnd, FAR const struct nxgl_point_s *center,
|
|
nxgl_coord_t radius, nxgl_coord_t width,
|
|
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
|
|
{
|
|
struct nxgl_point_s pts[NCIRCLE_POINTS];
|
|
FAR struct nxgl_vector_s vector;
|
|
int i;
|
|
int ret;
|
|
|
|
/* Convert the circle to a set of 16 points */
|
|
|
|
nxgl_circlepts(center, radius, pts);
|
|
|
|
/* Draw each pair of points as a vector */
|
|
|
|
for (i = POINT_0p0; i < POINT_337p5; i++)
|
|
{
|
|
vector.pt1.x = pts[i].x;
|
|
vector.pt1.y = pts[i].y;
|
|
vector.pt2.x = pts[i+1].x;
|
|
vector.pt2.y = pts[i+1].y;
|
|
ret = nxtk_drawlinewindow(hfwnd, &vector, width, color);
|
|
if (ret != OK)
|
|
{
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* The final, closing vector is a special case */
|
|
|
|
vector.pt1.x = pts[POINT_337p5].x;
|
|
vector.pt1.y = pts[POINT_337p5].y;
|
|
vector.pt2.x = pts[POINT_0p0].x;
|
|
vector.pt2.y = pts[POINT_0p0].y;
|
|
return nxtk_drawlinewindow(hfwnd, &vector, width, color);
|
|
}
|