guiaaline.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		: GUIAALine.C
Purpose 	: Drawing lines with antialiasing
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.h"
#include <stddef.h>

#if GUI_SUPPORT_AA

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_AA_DrawLine
*/
static void _AA_DrawLine(int x0, int y0, int x1, int y1)
{
	int xMin, xMax;
	U8 PenSizeOld = GUI_GetPenSize();
	U8 PenSizeHR = PenSizeOld *GUI_Context.AA_Factor;
	U8 OldPenShape = GUI_SetPenShape(GUI_PS_FLAT);
	/* Calculate left and right borders for AA module */
	if (x0 < x1)
	{
		xMin = x0;
		xMax = x1;
	}
	else
	{
		xMin = x1;
		xMax = x0;
	}
	if (GUI_Context.AA_HiResEnable)
	{
		xMin -= PenSizeHR;
		xMax += PenSizeHR;
		xMin /= GUI_Context.AA_Factor;
		xMax /= GUI_Context.AA_Factor;
	}
	else
	{
		xMin -= PenSizeOld;
		xMax += PenSizeOld;
		x0 *= GUI_Context.AA_Factor;
		x1 *= GUI_Context.AA_Factor;
		y0 *= GUI_Context.AA_Factor;
		y1 *= GUI_Context.AA_Factor;
	}
	/* Do the actual drawing */
	GUI_AA_Init(xMin, xMax);
	GUI_SetPenSize(PenSizeHR);
	GL_DrawLine(x0, y0, x1, y1);
	GUI_AA_Exit();
	/* Draw end points (can be optimized away in future, TBD*/
	switch (OldPenShape)
	{
		case GUI_PS_ROUND:
			{
				int r = GUI_Context.AA_Factor *PenSizeOld / 2;
				GL_FillCircleAA_HiRes(x0, y0, r);
				GL_FillCircleAA_HiRes(x1, y1, r);
			}
			break;
	}
	GUI_SetPenSize(PenSizeOld);
	GUI_SetPenShape(OldPenShape);
}

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_AA_DrawLine
*/
void GUI_AA_DrawLine(int x0, int y0, int x1, int y1)
{
	GUI_LOCK();
#if (GUI_WINSUPPORT)
	WM_ADDORG_AA(x0, y0);
	WM_ADDORG_AA(x1, y1);
	WM_ITERATE_START(NULL);
	{
#endif
		_AA_DrawLine(x0, y0, x1, y1);
#if (GUI_WINSUPPORT)
	} WM_ITERATE_END();
#endif
	GUI_UNLOCK();
}

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

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