gui_mergerect.c

嵌入式操作系统ucosii的gui,即图形用户界面

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              礐/GUI 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 redistributed
*              in any way. We appreciate your understanding and fairness.
*
* File    : GUI_MergeRect.C
* Purpose : Merging rectangles
*
*
* Version-Date---Author-Explanation
*
* 1.00.00 020517 RS     First release
*
*
* Known problems or limitations with current version
*
*    None.
*
*
* Open issues
*
*    None
*********************************************************************************************************
*/

#include "GUI.H"
#include "GUIDebug.h"

/*
  ********************************************************************
  *                                                                  *
  *                 Macros for internal use                          *
  *                                                                  *
  ********************************************************************
*/

#define Min(v0,v1) ((v0>v1) ? v1 : v0)
#define Max(v0,v1) ((v0>v1) ? v0 : v1)


/*
  ********************************************************************
  *
  *                 Public : GUI_MergeRect
  *
  ********************************************************************
*/
/* Calc smalles rectangles containing both rects*/
void GUI_MergeRect(GUI_RECT* pDest, const GUI_RECT* pr0, const GUI_RECT* pr1) {
  if (!pDest)
    return;
  if (pr0 && pr1) {
    pDest->x0 = Min (pr0->x0, pr1->x0);
    pDest->y0 = Min (pr0->y0, pr1->y0);
    pDest->x1 = Max (pr0->x1, pr1->x1);
    pDest->y1 = Max (pr0->y1, pr1->y1);
  }
  *pDest = *(pr0 ? pr0 : pr1);
}