/***********************************************************************************************************                                                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        : GUIDevB.CPurpose     : Implementation of banding memory devices----------------------------------------------------------------------Version-Date---Author-Explanation----------------------------------------------------------------------        010830 RS     GUI_MEMDEV_Draw now limits rectangle to                      LCD area in order to avoid wasting computation time        001109 RS     Bugfix: x0 was changed to 0 when moving the                      active area. Fixed.1.00    001015 RS     First release0.00.00 00     RS     Initial version for internal tests----------------------------------------------------------------------Known problems or limitations with current version----------------------------------------------------------------------None---------------------------END-OF-HEADER------------------------------*/#include <string.h>#include "GUI_Protected.h"#include "GUIDebug.h"/* Memory device capabilities are compiled only if support for them is enabled.*/ #if GUI_SUPPORT_MEMDEV/************************************************************              GUI_MEMDEV_Draw**********************************************************This routine uses a banding memory device to draw thegiven area flicker free. It not only draws, but alsoautomatically calculates the size of, creates, movesand then destroys the memory device.*/static int Min(int v0, int v1) {  if (v0 <= v1)    return v0;  return v1;}int GUI_MEMDEV_Draw(GUI_RECT* pRect, GUI_CALLBACK_VOID_P* pfDraw, void* pData, int NumLines, int Flags) {  int x0,y0, x1, y1, xsize, ysize;  GUI_MEMDEV_Handle hMD;  if (pRect) {    x0 = (pRect->x0 < 0) ? 0 : pRect->x0;    y0 = (pRect->y0 < 0) ? 0 : pRect->y0;    x1 = Min(pRect->x1, LCD_GET_XSIZE()-1);    y1 = Min(pRect->y1, LCD_GET_YSIZE()-1);    xsize = x1-x0+1;    ysize = y1-y0+1;  } else {    x0 = 0;    y0 = 0;    xsize = LCD_GET_XSIZE();    ysize = LCD_GET_YSIZE();  }  if (NumLines == 0) {    NumLines = -ysize;   /* Request <ysize> lines ... Less is o.k. */  }  if ((xsize<=0) || (ysize<=0))    return 0;           /* Nothing to do ... *//* Create memory device */  hMD = GUI_MEMDEV_CreateEx(x0,y0, xsize, NumLines, Flags);  if (!hMD) {    GUI_DEBUG_ERROROUT("GUI_MEMDEV_Draw() Not enough memory ...");            /* Not enough memory ! */    pfDraw(pData);    return 1;  }  NumLines = GUI_MEMDEV_GetYSize(hMD);  GUI_MEMDEV_Select(hMD);/* Start drawing ... */  {    int i;    for (i=0; i< ysize; i+=NumLines) {      int RemLines = ysize-i;      if (RemLines<NumLines) {        GUI_MEMDEV_ReduceYSize(hMD, RemLines);      }      if (i) {        GUI_MEMDEV_SetOrg(hMD, x0, y0+i);        GUI_MEMDEV_Clear(hMD);      }      pfDraw(pData);      GUI_MEMDEV_CopyToLCD(hMD);    }  }  GUI_MEMDEV_Delete(hMD);  GUI_MEMDEV_Select(0);  return 0;             /* Success ! */}#elsevoid GUIDEV_Banding(void) {} /* avoid empty object files */#endif /* GUI_MEMDEV_SUPPORT */