guidev_cmpwithlcd.c

在ucos上实现了图形用户接口GUI；值得一看

/*
*********************************************************************************************************
*                                                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        : GUIDevRB.C
Purpose     : Implementation of Checking for memory devices
----------------------------------------------------------------------
Version-Date---Author-Explanation
----------------------------------------------------------------------
1.00    000418 RS     First version for release (all tests O.K.)
---------------------------END-OF-HEADER------------------------------
*/


#include <string.h>
#include "GUI_Private.h"
#include "GUIDebug.h"

/*
 Memory device capabilities are compiled only if support for them is enabled.
*/ 

#if GUI_SUPPORT_MEMDEV



/*
      *************************************************
      *                                               *
      *             CompareWithLCD                    *
      *                                               *
      *************************************************
*/

int GUI_MEMDEV_CompareWithLCD(GUI_MEMDEV_Handle hMem, int*px, int*py, int *pExp, int*pAct) {
  /* Make sure memory handle is valid */
  if (!hMem) {
    hMem = GUI_Context.hDevData;
  }
  if (!hMem) {
    return 1;
  }
  {
    GUI_MEMDEV* pDevData = (GUI_MEMDEV*) GUI_ALLOC_LOCK(hMem);  /* Convert to pointer */
    int y     = pDevData->y0;
    int x0    = pDevData->x0;
    int XMax  = pDevData->XSize+x0;
    int YMax  = pDevData->YSize+y;
    int Max;
    int MagX = LCD_GetXMag();
    int MagY = LCD_GetYMag();
    /* Calculate limits */
    if (y < 0)
			y=0;
    if (x0 < 0)
			x0=0;
    Max = LCD_GET_YSIZE();
		if (YMax > Max)
			YMax = Max;
    Max = LCD_GET_XSIZE();
		if (XMax > Max)
			XMax = Max;
    for (; y < YMax; y++) {
      int x=x0;
      LCD_PIXELINDEX* pData = GUI_MEMDEV_XY2PTR(x,y);
      for (x=x0; x<XMax; x++) {
        int Exp = *pData++;
        int Act = LCD_L0_GetPixelIndex(x * MagX, y * MagY);
        if (Act != Exp) {
          *px    = x;
          *py    = y;
          *pAct  = Act;
          *pExp  = Exp;
          return 1;
        }
      }
    }
  }
  GUI_ALLOC_UNLOCK(hMem);
  return 0;
}

void GUIDEV_CmpWithLCD(void) {}

#else

void GUIDEV_CmpWithLCD(void) {} /* avoid empty object files */

#endif /* GUI_SUPPORT_MEMDEV */