diff options
Diffstat (limited to 'nuttx/graphics/nxtk/nxtk_fillcirclewindow.c')
-rw-r--r-- | nuttx/graphics/nxtk/nxtk_fillcirclewindow.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/nuttx/graphics/nxtk/nxtk_fillcirclewindow.c b/nuttx/graphics/nxtk/nxtk_fillcirclewindow.c new file mode 100644 index 000000000..34c945865 --- /dev/null +++ b/nuttx/graphics/nxtk/nxtk_fillcirclewindow.c @@ -0,0 +1,115 @@ +/**************************************************************************** + * graphics/nxtk/nxtk_fillcirclewindow.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/nxtk.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#define NCIRCLE_TRAPS 8 + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxtk_fillcirclewindow + * + * Description: + * Fill a circular region using the specified 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. + * color - The color to use to fill the circle. + * + * Return: + * OK on success; ERROR on failure with errno set appropriately + * + ****************************************************************************/ + +int nxtk_fillcirclewindow(NXWINDOW hfwnd, 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 = nxtk_filltrapwindow(hfwnd, &traps[i], color); + if (ret != OK) + { + return ret; + } + } + return OK; +} |