diff options
Diffstat (limited to 'nuttx/graphics/nxglib/nxglib_rectoverlap.c')
-rw-r--r-- | nuttx/graphics/nxglib/nxglib_rectoverlap.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/nuttx/graphics/nxglib/nxglib_rectoverlap.c b/nuttx/graphics/nxglib/nxglib_rectoverlap.c new file mode 100644 index 000000000..75d7a4641 --- /dev/null +++ b/nuttx/graphics/nxglib/nxglib_rectoverlap.c @@ -0,0 +1,90 @@ +/**************************************************************************** + * graphics/nxglib/nxsglib_nulloverlap.c + * + * Copyright (C) 2008-2011 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 <stdbool.h> + +#include <nuttx/nx/nxglib.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxgl_rectoverlap + * + * Description: + * Return true if the two rectangles overlap + * + ****************************************************************************/ + +bool nxgl_rectoverlap(FAR struct nxgl_rect_s *rect1, + FAR struct nxgl_rect_s *rect2) +{ + /* The neither is wholly above, below, right, or left of the other, then + * the two rectangles overlap in some fashion. + */ + + return (rect1->pt1.x <= rect2->pt2.x) && /* false: rect1 is wholly to the right */ + (rect2->pt1.x <= rect1->pt2.x) && /* false: rect2 is wholly to the right */ + (rect1->pt1.y <= rect2->pt2.y) && /* false: rect1 is wholly below rect2 */ + (rect2->pt1.y <= rect1->pt2.y); /* false: rect2 is wholly below rect1 */ +} + |