gui__intersectrect.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 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_IntersectRect.c
Purpose 	: Implementation of GUI_IntersectRect
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.h"

/*********************************************************************
*
*   	public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI__IntersectRects
*
* Purpose:
*   Calc intersection of rectangles
*
* Add. info:
*   Rectangles are passed as pointers. These pointers need to be valid;
*   a NULL pointer may not be passed. There is no check for NULL pointers
*   implemented in order to avoid avoid performance penalty.
*   There is a similar function available, GUI__IntersectRects(),
*   which takes 3 parameters and
*   has a return value. Note that this one should be preferred because
*   it is considerably faster and the call requires one parameter less.
*/
void GUI__IntersectRect(GUI_RECT *pDest, const GUI_RECT *pr0)
{
	if (pDest->x0 < pr0->x0)
	{
		pDest->x0 = pr0->x0;
	}
	if (pDest->y0 < pr0->y0)
	{
		pDest->y0 = pr0->y0;
	}
	if (pDest->x1 > pr0->x1)
	{
		pDest->x1 = pr0->x1;
	}
	if (pDest->y1 > pr0->y1)
	{
		pDest->y1 = pr0->y1;
	}
}

/*************************** End of file ****************************/