• 显示下一页

      1. int ShowNextPage(void)
      2. {
      3.   int iError;
      4.   PT_PageDesc ptPage;        /* 定义页信息的指针 */
      5.   unsigned char *pucTextFileMemCurPos;    /* 当前指向text文件的位置 */
      7.   if (g_ptCurPage)    /* 判断当前page是否存在 */
      8.   {
      9.       /* 将下一page的起始位置取出来 */
      10.       pucTextFileMemCurPos = g_ptCurPage->pucLcdNextPageFirstPosAtFile;
      11.   }
      12.   else
      13.   {
      14.       /* 否则将初始的其实位置取出来 */
      15.       pucTextFileMemCurPos = g_pucLcdFirstPosAtFile;    
      16.   }
      17.   /* 执行显示page操作 */
      18.   iError = ShowOnePage(pucTextFileMemCurPos);
      19.   DBG_PRINTF("%s %d, %d\n", __FUNCTION__, __LINE__, iError);
      20.   if (iError == 0)
      21.   {
      22.       if (g_ptCurPage && g_ptCurPage->ptNextPage)
      23.       {
      24.           g_ptCurPage = g_ptCurPage->ptNextPage;
      25.           return 0;
      26.       }
      28.       ptPage = malloc(sizeof(T_PageDesc));
      29.       if (ptPage)
      30.       {
      31.           ptPage->pucLcdFirstPosAtFile         = pucTextFileMemCurPos;
      32.           ptPage->pucLcdNextPageFirstPosAtFile = g_pucLcdNextPosAtFile;
      33.           ptPage->ptPrePage                    = NULL;
      34.           ptPage->ptNextPage                   = NULL;
      35.           g_ptCurPage = ptPage;
      36.           DBG_PRINTF("%s %d, pos = 0x%x\n", __FUNCTION__, __LINE__, (unsigned int)ptPage->pucLcdFirstPosAtFile);
      37.           RecordPage(ptPage);
      38.           return 0;
      39.       }
      40.       else
      41.       {
      42.           return -1;
      43.       }
      44.   }
      45.   return iError;
      46. }

    • 显示一页 ```c int ShowOnePage(unsigned char pucTextFileMemCurPos) { int iLen; int iError; unsigned char pucBufStart; unsigned int dwCode; PT_FontOpr ptFontOpr; T_FontBitMap tFontBitMap;

      int bHasNotClrSceen = 1; / 清屏标志 / int bHasGetCode = 0; / /

      tFontBitMap.iCurOriginX = 0; / x / tFontBitMap.iCurOriginY = g_dwFontSize; / y / pucBufStart = pucTextFileMemCurPos; / 设置buf起始位置 /

    1. while (1)
    2. {
    3.     /*  */
    4.     iLen = g_ptEncodingOprForFile->GetCodeFrmBuf(pucBufStart, g_pucTextFileMemEnd, &dwCode);
    5.     if (0 == iLen)
    6.     {
    7.         /* 文件结束 */
    8.         if (!bHasGetCode)
    9.         {
    10.             return -1;
    11.         }
    12.         else
    13.         {
    14.             return 0;
    15.         }
    16.     }
    18.     bHasGetCode = 1;    /* 成功获取code */
    20.     pucBufStart += iLen;
    22.     /* 有些文本, \n\r两个一起才表示回车换行
    23.      * 碰到这种连续的\n\r, 只处理一次
    24.      */
    25.     if (dwCode == '\n')
    26.     {
    27.         g_pucLcdNextPosAtFile = pucBufStart;
    29.         /* 回车换行 */
    30.         tFontBitMap.iCurOriginX = 0;
    31.         tFontBitMap.iCurOriginY = IncLcdY(tFontBitMap.iCurOriginY);
    32.         if (0 == tFontBitMap.iCurOriginY)
    33.         {
    34.             /* 显示完当前一屏了 */
    35.             return 0;
    36.         }
    37.         else
    38.         {
    39.             continue;
    40.         }
    41.     }
    42.     else if (dwCode == '\r')
    43.     {
    44.         continue;
    45.     }
    46.     else if (dwCode == '\t')
    47.     {
    48.         /* TAB键用一个空格代替 */
    49.         dwCode = ' ';
    50.     }
    52.     DBG_PRINTF("dwCode = 0x%x\n", dwCode);
    54.     ptFontOpr = g_ptEncodingOprForFile->ptFontOprSupportedHead;
    55.     while (ptFontOpr)
    56.     {
    57.         DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
    58.         iError = ptFontOpr->GetFontBitmap(dwCode, &tFontBitMap);
    59.         DBG_PRINTF("%s %s %d, ptFontOpr->name = %s, %d\n", __FILE__, __FUNCTION__, __LINE__, ptFontOpr->name, iError);
    60.         if (0 == iError)
    61.         {
    62.             DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
    63.             if (RelocateFontPos(&tFontBitMap))
    64.             {
    65.                 /* 剩下的LCD空间不能满足显示这个字符 */
    66.                 return 0;
    67.             }
    68.             DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
    70.             if (bHasNotClrSceen)
    71.             {
    72.                 /* 首先清屏 */
    73.                 g_ptDispOpr->CleanScreen(COLOR_BACKGROUND);
    74.                 bHasNotClrSceen = 0;
    75.             }
    76.             DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
    77.             /* 显示一个字符 */
    78.             if (ShowOneFont(&tFontBitMap))
    79.             {
    80.                 return -1;
    81.             }
    83.             tFontBitMap.iCurOriginX = tFontBitMap.iNextOriginX;
    84.             tFontBitMap.iCurOriginY = tFontBitMap.iNextOriginY;
    85.             g_pucLcdNextPosAtFile = pucBufStart;
    87.             /* 继续取出下一个编码来显示 */
    88.             break;
    89.         }
    90.         ptFontOpr = ptFontOpr->ptNext;
    91.     }        
    92. }

    ```