guidev_xy2ptr.c

来自「MCB2300_ucgui_LCD320240.rar LPC2368的u」· C语言 代码 · 共 72 行

/*********************************************************************
*   			 SEGGER MICROCONTROLLER SYSTEME GmbH				 *
*   	 Solutions for real time microcontroller applications   	 *
**********************************************************************
*   																 *
*   	 (c) 1996 - 2004  SEGGER Microcontroller Systeme GmbH   	 *
*   																 *
*   	 Internet: www.segger.com    Support:  [e-mail]    *
*   																 *
**********************************************************************

***** emWin - Graphical user interface for embedded applications *****
emWin 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 re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File		: GUIDEV_XY2PTR.c
Purpose 	: Implementation of memory devices
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Private.h"
#include "GUIDebug.h"

#if GUI_SUPPORT_MEMDEV

/*********************************************************************
*
*   	modul internal routines
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_MEMDEV__XY2PTR
*/
void * GUI_MEMDEV__XY2PTR(int x, int y)
{
	GUI_MEMDEV* pDev = GUI_MEMDEV_H2P(GUI_Context.hDevData);
	U8 *pData = (U8 *) (pDev + 1);
#if GUI_DEBUG_LEVEL >= GUI_DEBUG_LEVEL_CHECK_ALL
	if ((x >= pDev->x0 + pDev->XSize) | (x < pDev->x0) | (y >= pDev->y0 + pDev->YSize) | (y < pDev->y0))
	{
		GUI_DEBUG_ERROROUT2("GUI_MEMDEV__XY2PTR: parameters out of bounds", x, y);
	}
#endif
	pData += (y - pDev->y0) * pDev->BytesPerLine;
	return pData + (x - pDev->x0) * (pDev->BitsPerPixel / 8);
}

/*********************************************************************
*
*   	GUI_MEMDEV__XY2PTREx
*/
void * GUI_MEMDEV__XY2PTREx(GUI_MEMDEV *pDev, int x, int y)
{
	U8 *pData = (U8 *) (pDev + 1);
	pData += y * pDev->BytesPerLine;
	return pData + x * (pDev->BitsPerPixel / 8);
}

#else

void GUIDEV_XY2PTR_C(void)
{
}

#endif /* GUI_SUPPORT_MEMDEV */

/*************************** end of file ****************************/