guiaapoly.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		: GUIPolyAA.C
Purpose 	: Draw Polygon routines with Antialiasing
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Private.h"

#include <stdio.h>
#include <string.h>
#include <math.h>

#if GUI_SUPPORT_AA

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_FillPolygonAA
*/
static void _FillPolygonAA(GUI_POINT *paPoint, int NumPoints, int x, int y)
{
	int i;
	int Stat;
	int x0,x1;
	int PosFactor = GUI_Context.AA_HiResEnable ? 1 : GUI_Context.AA_Factor;
	/* Calc horizontal limits and init GUI_AA */
	x0 = x1 = paPoint[0].x;
	for (i = 1; i < NumPoints; i++)
	{
		int x = paPoint[i].x;
		if (x < x0)
		{
			x0 = x;
		}
		if (x > x1)
		{
			x1 = x;
		}
	}
	if (!GUI_Context.AA_HiResEnable)
	{
		Stat = GUI_AA_Init(x0 + x, x1 + x);
	}
	else
	{
		Stat = GUI_AA_Init((x0 + x) / GUI_Context.AA_Factor, (x1 + x) / GUI_Context.AA_Factor);
	}
	if (Stat == 0)
	{
		/* Modify pointlist */
		if (!GUI_Context.AA_HiResEnable)
		{
			for (i = 0; i < NumPoints; i++)
			{
				paPoint[i].x *= GUI_Context.AA_Factor;
				paPoint[i].y *= GUI_Context.AA_Factor;
			}
		}
		GL_FillPolygon(paPoint, NumPoints, x * PosFactor, y * PosFactor);
		/* Restore pointlist */
		if (!GUI_Context.AA_HiResEnable)
		{
			for (i = 0; i < NumPoints; i++)
			{
				paPoint[i].x /= GUI_Context.AA_Factor;
				paPoint[i].y /= GUI_Context.AA_Factor;
			}
		}
		/* Cleanup */
	}
	GUI_AA_Exit();
}

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_AA_FillPolygon
*/
void GUI_AA_FillPolygon(/*const*/ GUI_POINT *pPoints, int NumPoints, int x0, int y0)
{
	GUI_LOCK();
#if (GUI_WINSUPPORT)
	WM_ADDORG_AA(x0, y0);
	WM_ITERATE_START(NULL);
	{
#endif
		/* Variables in MEMDEV module (with memory devices only) */
#if GUI_SUPPORT_MEMDEV
		if (GUI_Context.pDeviceAPI->pfFillPolygonAA)
		{
			GUI_Context.pDeviceAPI->pfFillPolygonAA(pPoints, NumPoints, x0, y0);
		}
		else
		  #endif
		{
			_FillPolygonAA(pPoints, NumPoints, x0, y0);
		}
#if (GUI_WINSUPPORT)
	} WM_ITERATE_END();
#endif
	GUI_UNLOCK();
}

#else   						 /* Avoid problems with empty object modules */
void GUIAAPoly_C(void);
void GUIAAPoly_C(void)
{
}
#endif /* GUI_SUPPORT_AA */

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