gui_drawgraph.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_DrawPolyline.c
Purpose 	: Implementation of GUI_DrawPolyline
---------------------------END-OF-HEADER------------------------------
*/

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

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_DrawGraph
*/
static void _DrawGraph(I16 *pay, int NumPoints, int xOff, int yOff)
{
	int i;
	int y0, y1;
	int yClip0, yClip1;
	/* Perform high level clipping in x */
	yClip0 = GUI_Context.pClipRect_HL->y0;
	yClip1 = GUI_Context.pClipRect_HL->y1;
	i = 0;
	if (GUI_Context.pClipRect_HL)
	{
		if (xOff < GUI_Context.pClipRect_HL->x0)
		{
			i = GUI_Context.pClipRect_HL->x0 - xOff;
		}
		if (xOff + NumPoints - 1 > GUI_Context.pClipRect_HL->x1)
		{
			NumPoints = GUI_Context.pClipRect_HL->x1 - xOff + 1;
		}
	}
	/* Start drawing if there is something left to do after x-clipping */
	if (i < NumPoints)
	{
		y0 = *(pay + i++) + yOff;
		/* Iterate */
		for (; i < NumPoints; i++)
		{
			/* Perform high level clipping in y */
			y1 = *(pay + i) + yOff;
			if ((y0 >= yClip0) || (y1 >= yClip0))
			{
				if ((y0 <= yClip1) || (y1 <= yClip1))
				{
					int y01;
					y01 = (y1 + y0) / 2;
					if (y0 <= y1)
					{
						LCD_DrawVLine(i + xOff - 1, y0, y01);
						LCD_DrawVLine(i + xOff, y01, y1);
					}
					else
					{
						LCD_DrawVLine(i + xOff - 1, y01, y0);
						LCD_DrawVLine(i + xOff, y1, y01);
					}
				}
			}
			y0 = y1;
		}
	}
}

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_DrawGraph
*/  
void GUI_DrawGraph(I16 *pay, int NumPoints, int x0, int y0)
{
	GUI_LOCK();
#if (GUI_WINSUPPORT)
	WM_ADDORG(x0, y0);
	WM_ITERATE_START(NULL);
	{
#endif
		_DrawGraph(pay, NumPoints, x0, y0);
#if (GUI_WINSUPPORT)
	} WM_ITERATE_END();
#endif
	GUI_UNLOCK();
}

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