gui_rectsintersect.c

uC/GUI是一个通用的嵌入式应用的图形模块

/*********************************************************************
*                SEGGER MICROCONTROLLER SYSTEME GmbH                 *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 2002         SEGGER Microcontroller Systeme GmbH        *
*                                                                    *
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**** emWin/GSC Grafical user interface for embedded applications ****
emWin is protected by international copyright laws. Knowledge of the
source code may not be used to write a similar product. This file may
only be used in accordance with a license and should not be re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File        : GUI_RectsIntersect.C
Purpose     : Implementation of GUI_RectsIntersect
---------------------------END-OF-HEADER------------------------------
*/


#include <stddef.h>           /* needed for definition of NULL */
#include "GUI_Protected.H"


/*******************************************************************
*
*                 Macros
*
********************************************************************

 Check if rectangle do intersect.
 Returns:
   0 if they do not.
   1 if they do.
*/

int GUI_RectsIntersect(const GUI_RECT* pr0, const GUI_RECT* pr1) {
  if (pr0->y0 <= pr1->y1) {
    if (pr1->y0 <= pr0->y1) {
      if (pr0->x0 <= pr1->x1) {
        if (pr1->x0 <= pr0->x1) {
          return 1;
        }
      }
    }
  }
  return 0;
}