增加Input设备功能

支持多种输入方法主要包括三种方法：轮询、slcet、多线程，本节主要介绍轮询方法，这种方法特点是CPU占用率高

一、分析源码

input/input_manager.c

#include <config.h>
#include <input_manager.h>
#include <string.h>

static PT_InputOpr g_ptInputOprHead;

int RegisterInputOpr(PT_InputOpr ptInputOpr)
{
	PT_InputOpr ptTmp;

	if (!g_ptInputOprHead)
	{
		g_ptInputOprHead   = ptInputOpr;
		ptInputOpr->ptNext = NULL;
	}
	else
	{
		ptTmp = g_ptInputOprHead;
		while (ptTmp->ptNext)
		{
			ptTmp = ptTmp->ptNext;
		}
		ptTmp->ptNext	  = ptInputOpr;
		ptInputOpr->ptNext = NULL;
	}

	return 0;
}


void ShowInputOpr(void)
{
	int i = 0;
	PT_InputOpr ptTmp = g_ptInputOprHead;

	while (ptTmp)
	{
		printf("%02d %s\n", i++, ptTmp->name);
		ptTmp = ptTmp->ptNext;
	}
}
int InputInit(void)
{
	int iError;
	
	iError = StdinInit();
	iError |= TouchScreenInit();
	return iError;
}
/*在main函数中被调用*/
int AllInputDevicesInit(void)
{
	PT_InputOpr ptTmp = g_ptInputOprHead;
	int iError = -1;

	while (ptTmp)
	{
		if (0 == ptTmp->InputDeviceInit())
		{
			iError = 0;
		}
		ptTmp = ptTmp->ptNext;
	}
	return iError;
}

int    GetInputEvent(PT_InputEvent ptInputEvent)
{
/*轮询查找输入事件，只要输入事件返回等于0，表明已经获取输入事件*/
	PT_InputOpr ptTmp = g_ptInputOprHead;
	
	while (ptTmp)
	{
		if ( ptTmp->GetInputEvent(ptInputEvent)== 0)
		{
			return 0;
		}
		ptTmp = ptTmp->ptNext;
	}
	return -1;
}

#include <input_manager.h>
#include <termios.h> /*包含struct termios tTTYState;*/
#include <unistd.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>

static int StdinInputDeviceInit(void);
static int  StdioInputDeviceExit(void);
static int StdinGetInputEvent(PT_InputEvent ptInputEvent);

static T_InputOpr g_tStdinOpr = {
	.name  = "stdin",
	.InputDeviceInit = StdinInputDeviceInit,
	.InputDeviceEXit = StdioInputDeviceExit, 
	.GetInputEvent =  StdinGetInputEvent,
};

static int StdinInputDeviceInit(void)
{
	struct termios tTTYState;
 
    //get the terminal state 获取终端状态
    tcgetattr(STDIN_FILENO, &tTTYState);
 
    //turn off canonical mode 关闭canonical
    tTTYState.c_lflag &= ~ICANON;
    //minimum of number input read.
    tTTYState.c_cc[VMIN] = 1;   /* 有一个数据时就立刻返回 */

    //set the terminal attributes.
    tcsetattr(STDIN_FILENO, TCSANOW, &tTTYState);

	return 0;	
}
static int  StdioInputDeviceExit(void)
{
	   struct termios tTTYState;
 
    //get the terminal state
    tcgetattr(STDIN_FILENO, &tTTYState);
 
    //turn on canonical mode
    tTTYState.c_lflag |= ICANON;
	
    //set the terminal attributes.
    tcsetattr(STDIN_FILENO, TCSANOW, &tTTYState);	
	return 0;
}
static int StdinGetInputEvent(PT_InputEvent ptInputEvent)
{
	/* 如果有数据就读取、处理、返回
	 * 如果没有数据, 立刻返回-1, 不等待
	 */

	/* select, poll 可以参数 UNIX环境高级编程 */

    struct timeval tTV;
    fd_set tFDs;
    char c;
	
    tTV.tv_sec = 0;
    tTV.tv_usec = 0;
    FD_ZERO(&tFDs);
	
    FD_SET(STDIN_FILENO, &tFDs); //STDIN_FILENO is 0
    select(STDIN_FILENO+1, &tFDs, NULL, NULL, &tTV);  /*采用非阻塞*/
    /*FD_ISSET(STDIN_FILENO, &tFDs)   判断是否设置设置，有数据了*/
    if (FD_ISSET(STDIN_FILENO, &tFDs))
    {
		/* 处理数据 */
		ptInputEvent->iType = INPUT_TYPE_STDIN;
		/*记录当前事件时间*/
		gettimeofday(&ptInputEvent->tTime, NULL);
		
		c = fgetc(stdin);
		if (c == ‘u‘)
		{
			ptInputEvent->iVal = INPUT_VALUE_UP;
		}
		else if (c == ‘n‘)
		{
			ptInputEvent->iVal = INPUT_VALUE_DOWN;
		}
		else if (c == ‘q‘)
		{
			ptInputEvent->iVal = INPUT_VALUE_EXIT;
		}
		else
		{
			ptInputEvent->iVal = INPUT_VALUE_UNKNOWN;
		}		
		return 0;
    }
   else
  {
		return -1;
   }
}
int StdinInit(void)
{
	return RegisterInputOpr(&g_tStdinOpr);
}

#include <config.h>
#include <input_manager.h>
#include <stdlib.h>
#include <draw.h>  /*调用int GetDispResolution(int *piXres, int *piYres);*/
#include <tslib.h>

/* 参考tslib里的ts_print.c */


static struct tsdev *g_tTSDev;
static int giXres;
static int giYres;

static int TouchScreenDevInit(void);
static int TouchScreenDevExit(void);
static int TouchScreenGetInputEvent(PT_InputEvent ptInputEvent);

static T_InputOpr g_tTouchScreenOpr = {
	.name          = "touchscreen",
	.InputDeviceInit    = TouchScreenDevInit,
	.InputDeviceEXit    = TouchScreenDevExit,
	.GetInputEvent = TouchScreenGetInputEvent,
};


/* 注意: 由于要用到LCD的分辨率, 此函数要在SelectAndInitDisplay之后调用 */
static int TouchScreenDevInit(void)
{
	char *pcTSName = NULL;

	if ((pcTSName = getenv("TSLIB_TSDEVICE")) != NULL ) 
	{
		g_tTSDev = ts_open(pcTSName, 1);     /*0:表示阻塞,1代表非阻塞*/
	}
	else
	{
		g_tTSDev = ts_open("/dev/input/event0", 1);      
	}

	if (!g_tTSDev) {
		DBG_PRINTF("ts_open error!\n");
		return -1;
	}

	if (ts_config(g_tTSDev)) {
		DBG_PRINTF("ts_config error!\n");
		return -1;
	}

	if (GetDispResolution(&giXres, &giYres))
	{
		return -1;
	}

	return 0;
}

static int TouchScreenDevExit(void)
{
	return 0;
}


static int isOutOf500ms(struct timeval *ptPreTime, struct timeval *ptNowTime)
{
	int iPreMs;
	int iNowMs;
	
	iPreMs = ptPreTime->tv_sec * 1000 + ptPreTime->tv_usec / 1000;
	iNowMs = ptNowTime->tv_sec * 1000 + ptNowTime->tv_usec / 1000;

	/*如果iNowMs大于iPreMs，返回1*/

	return (iNowMs > iPreMs + 500);
}

static int TouchScreenGetInputEvent(PT_InputEvent ptInputEvent)
{
	struct ts_sample tSamp;
	int iRet;

	static struct timeval tPreTime;     /*记录上一次按下的时间值*/
	
	iRet = ts_read(g_tTSDev, &tSamp, 1);  
	
	if (iRet < 0) {
		return -1;
	}

	/* 处理数据 */
	if (isOutOf500ms(&tPreTime, &(tSamp.tv)))    /*tSamp.tv  表示记录当前值  ，500毫秒处理一次*/
	{
		/* 如果此次触摸事件发生的时间, 距上次事件超过了500ms */
		tPreTime = tSamp.tv;           /* 保存此次的时间值，用于下次比较*/      
		ptInputEvent->tTime = tSamp.tv;	/*ptInputEvent 保存此次事件时间值*/
		ptInputEvent->iType = INPUT_TYPE_TOUCHSCREEN;
/*LCD 坐标系*/
		if (tSamp.y < giYres/3)
		{
			ptInputEvent->iVal = INPUT_VALUE_UP;
		}
		else if (tSamp.y > 2*giYres/3)
		{
			ptInputEvent->iVal = INPUT_VALUE_DOWN;
		}
		else
		{
			ptInputEvent->iVal = INPUT_VALUE_UNKNOWN;
		}
		return 0;
		
	}
	else
	{
		return -1;
	}
	return 0;
}



int TouchScreenInit(void)
{
	return RegisterInputOpr(&g_tTouchScreenOpr);
}

#include <config.h>
#include <encoding_manager.h>
#include <string.h>
#include <stdlib.h>

static PT_EncodingOpr g_ptEncodingOprHead;
//static T_EncodingOpr *g_ptEncodingOprHead;

int RegisterEncodingOpr(PT_EncodingOpr ptEncodingOpr)
{
	PT_EncodingOpr ptTmp;

	if (!g_ptEncodingOprHead)
	{
		g_ptEncodingOprHead   = ptEncodingOpr;
		ptEncodingOpr->ptNext = NULL;
	}
	else
	{
		ptTmp = g_ptEncodingOprHead;
		while (ptTmp->ptNext)
		{
			ptTmp = ptTmp->ptNext;
		}
		ptTmp->ptNext	      = ptEncodingOpr;
		ptEncodingOpr->ptNext = NULL;
	}

	return 0;
}



void ShowEncodingOpr(void)
{
	int i = 0;
	PT_EncodingOpr ptTmp = g_ptEncodingOprHead;

	while (ptTmp)
	{
		printf("%02d %s\n", i++, ptTmp->name);
		ptTmp = ptTmp->ptNext;
	}
}

PT_EncodingOpr SelectEncodingOprForFile(unsigned char *pucFileBufHead)
{
	PT_EncodingOpr ptTmp = g_ptEncodingOprHead;

	while (ptTmp)
	{	
		if (ptTmp->isSupport(pucFileBufHead))
			return ptTmp;
		else
			ptTmp = ptTmp->ptNext;
	}
	return NULL;
}


int AddFontOprForEncoding(PT_EncodingOpr ptEncodingOpr, PT_FontOpr ptFontOpr)
{
	PT_FontOpr ptFontOprCpy;
	
	if (!ptEncodingOpr || !ptFontOpr)
	{
		return -1;
	}
	else
	{
		ptFontOprCpy = malloc(sizeof(T_FontOpr));
		if (!ptFontOprCpy)
		{
			return -1;
		}
		else
		{
			memcpy(ptFontOprCpy, ptFontOpr, sizeof(T_FontOpr));
			ptFontOprCpy->ptNext = ptEncodingOpr->ptFontOprSupportedHead;
			ptEncodingOpr->ptFontOprSupportedHead = ptFontOprCpy;
			return 0;
		}		
	}
}

int DelFontOprFrmEncoding(PT_EncodingOpr ptEncodingOpr, PT_FontOpr ptFontOpr)
{
	PT_FontOpr ptTmp;
	PT_FontOpr ptPre;
		
	if (!ptEncodingOpr || !ptFontOpr)
	{
		return -1;
	}
	else
	{
		ptTmp = ptEncodingOpr->ptFontOprSupportedHead;
		if (strcmp(ptTmp->name, ptFontOpr->name) == 0)
		{
			/* 删除头节点 */
			ptEncodingOpr->ptFontOprSupportedHead = ptTmp->ptNext;
			free(ptTmp);
			return 0;
		}

		ptPre = ptEncodingOpr->ptFontOprSupportedHead;
		ptTmp = ptPre->ptNext;
		while (ptTmp)
		{
			if (strcmp(ptTmp->name, ptFontOpr->name) == 0)
			{
				/* 从链表里取出、释放 */
				ptPre->ptNext = ptTmp->ptNext;
				free(ptTmp);
				return 0;
			}
			else
			{
				ptPre = ptTmp;
				ptTmp = ptTmp->ptNext;
			}
		}

		return -1;
	}
}

int EncodingInit(void)
{
	int iError;

	iError = AsciiEncodingInit();
	if (iError)
	{
		DBG_PRINTF("AsciiEncodingInit error!\n");
		return -1;
	}

	iError = Utf16leEncodingInit();
	if (iError)
	{
		DBG_PRINTF("Utf16leEncodingInit error!\n");
		return -1;
	}
	
	iError = Utf16beEncodingInit();
	if (iError)
	{
		DBG_PRINTF("Utf16beEncodingInit error!\n");
		return -1;
	}
	
	iError = Utf8EncodingInit();
	if (iError)
	{
		DBG_PRINTF("Utf8EncodingInit error!\n");
		return -1;
	}

	return 0;
}

#include <config.h>
#include <encoding_manager.h>
#include <string.h>

static int isAsciiCoding(unsigned char *pucBufHead);
static int AsciiGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode);
#if 0
typedef struct EncodingOpr {
	char *name;
	int iHeadLen;
	PT_FontOpr ptFontOprSupportedHead;
	int (*isSupport)(unsigned char *pucBufHead);
	int (*GetCodeFrmBuf)(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode);
	struct EncodingOpr *ptNext;
}T_EncodingOpr, *PT_EncodingOpr;
#endif

static T_EncodingOpr g_tAsciiEncodingOpr = {
	.name	 		= "ascii",
	.iHeadLen	 		= 0,
	.isSupport  		= isAsciiCoding,
	.GetCodeFrmBuf	= AsciiGetCodeFrmBuf,
};
/*
*功能描述:判断缓冲区的编码方式是否为ANSI编码英文字母用ASCII,汉字用GBK
*返回值0 代表 不是
*		    1  代表是
*/

static int isAsciiCoding(unsigned char *pucBufHead)
{
	const char aStrUtf8[] 		= {0xEF, 0xBB, 0xBF, 0};
	const char aStrUtf16le[] 		= {0xFF, 0xFE, 0};
	const char aStrUtf16be[] 	= {0xFE, 0xFF, 0};

	if(strncmp((const char*)pucBufHead, aStrUtf8, 3) ==0)
	{
		return 0;
	}
	else if(strncmp((const char*)pucBufHead, aStrUtf16le, 2) ==0)
	{
		return 0;
	}
	else if(strncmp((const char*)pucBufHead, aStrUtf16be, 2) ==0)
	{
		return 0;
	}
	else
	{
		return 1;
	}
}
/*
*功能描述: 从缓冲区取出1个字符的ANSI的编码值
*输入参数: pucBufStart	缓冲区起始地址
* 			    pucBufEnd    缓冲区结束地址
*输出参数: pdwCode   	取出处理后的编码值     				
* 返回值	  : 0			表示 处理完毕，没有得到编码值
*			    其他值  表示从pucBufStat开始头信息字符的个数
*/
static int AsciiGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode)
{
	unsigned char *pucBuf	= pucBufStart;
	unsigned char c 		= *pucBuf;

	if((pucBuf < pucBufEnd) && ( c < (unsigned char )0x80))
	{
		/*返回ASCII 值*/
		*pdwCode = (unsigned int)c;
		return 1;
	}
	if(((pucBuf + 1) < pucBufEnd) && (c >= (unsigned char)0x80))
	{
		/*返回GBK 码*/
		*pdwCode = (unsigned int)((pucBuf[1]<<8)  + pucBuf[0] );
		return 2;
	}

	if(pucBuf < pucBufEnd)
	{
		*pdwCode = (unsigned int)c;
		return 1;
	}
	else
	{
		return 0;
	}
}

int AsciiEncodingInit(void)
{
	AddFontOprForEncoding(&g_tAsciiEncodingOpr, GetFontOpr("freetype"));
	AddFontOprForEncoding(&g_tAsciiEncodingOpr, GetFontOpr("ascii"));
	AddFontOprForEncoding(&g_tAsciiEncodingOpr, GetFontOpr("gbk"));
	return RegisterEncodingOpr(&g_tAsciiEncodingOpr);
}

#include <config.h>
#include <encoding_manager.h>
#include <string.h>

static int isUtf8Coding(unsigned char *pucBufHead);
static int Utf8GetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode);

static T_EncodingOpr g_tUtf8EncodingOpr = {
	.name          = "utf-8",
	.iHeadLen	   = 3,
	.isSupport     = isUtf8Coding,
	.GetCodeFrmBuf = Utf8GetCodeFrmBuf,
};

static int isUtf8Coding(unsigned char *pucBufHead)
{
	const char aStrUtf8[]    = {0xEF, 0xBB, 0xBF, 0};
	if (strncmp((const char*)pucBufHead, aStrUtf8, 3) == 0)
	{
		/* UTF-8 */
		return 1;
	}
	else
	{
		return 0;
	}
}

/* 获得前导为1的位的个数
 * 比如二进制数 11001111 的前导1有2位
 *              11100001 的前导1有3位
 */
static int GetPreOneBits(unsigned char ucVal)
{
	int i;
	int j = 0;
	
	for (i = 7; i >= 0; i--)
	{
		if (!(ucVal & (1<<i)))
			break;
		else
			j++;
	}
	return j;

}

/* 返回值: 0    - 文件结束
 *         正值 - buffer里用几个字节来表示当前的"字"(编码)
 *
 */
static int Utf8GetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode)
{
#if 0
    对于UTF-8编码中的任意字节B，如果B的第一位为0，则B为ASCII码，并且B独立的表示一个字符;
    如果B的第一位为1，第二位为0，则B为一个非ASCII字符（该字符由多个字节表示）中的一个字节，并且不为字符的第一个字节编码;
    如果B的前两位为1，第三位为0，则B为一个非ASCII字符（该字符由多个字节表示）中的第一个字节，并且该字符由两个字节表示;
    如果B的前三位为1，第四位为0，则B为一个非ASCII字符（该字符由多个字节表示）中的第一个字节，并且该字符由三个字节表示;
    如果B的前四位为1，第五位为0，则B为一个非ASCII字符（该字符由多个字节表示）中的第一个字节，并且该字符由四个字节表示;

    因此，对UTF-8编码中的任意字节，根据第一位，可判断是否为ASCII字符;
    根据前二位，可判断该字节是否为一个字符编码的第一个字节; 
    根据前四位（如果前两位均为1），可确定该字节为字符编码的第一个字节，并且可判断对应的字符由几个字节表示;
    根据前五位（如果前四位为1），可判断编码是否有错误或数据传输过程中是否有错误。
#endif

	int i;	
	int iNum;
	unsigned char ucVal;
	unsigned int dwSum = 0;

	if (pucBufStart >= pucBufEnd)
	{
		/* 文件结束 */
		return 0;
	}

	ucVal = pucBufStart[0];
	iNum  = GetPreOneBits(pucBufStart[0]);

	if ((pucBufStart + iNum) > pucBufEnd)
	{
		/* 文件结束 */
		return 0;
	}

	if (iNum == 0)
	{
		/* ASCII */
		*pdwCode = pucBufStart[0];
		return 1;
	}
	else
	{
		ucVal = ucVal << iNum;
		ucVal = ucVal >> iNum;
		dwSum += ucVal;
		for (i = 1; i < iNum; i++)
		{
			ucVal = pucBufStart[i] & 0x3f;
			dwSum = dwSum << 6;
			dwSum += ucVal;			
		}
		*pdwCode = dwSum;
		return iNum;
	}
}

int  Utf8EncodingInit(void)
{
	AddFontOprForEncoding(&g_tUtf8EncodingOpr, GetFontOpr("freetype"));
	AddFontOprForEncoding(&g_tUtf8EncodingOpr, GetFontOpr("ascii"));
	return RegisterEncodingOpr(&g_tUtf8EncodingOpr);
}

#include <config.h>
#include <encoding_manager.h>
#include <string.h>

static int isUtf16leCoding(unsigned char *pucBufHead);
static int Utf16leGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode);

static T_EncodingOpr g_tUtf16leEncodingOpr = {
	.name          = "utf-16le",
	.iHeadLen	   = 2,
	.isSupport     = isUtf16leCoding,
	.GetCodeFrmBuf = Utf16leGetCodeFrmBuf,
};

static int isUtf16leCoding(unsigned char *pucBufHead)
{
	const char aStrUtf16le[] = {0xFF, 0xFE, 0};
	if (strncmp((const char *)pucBufHead, aStrUtf16le, 2) == 0)
	{
		/* UTF-16 little endian */
		return 1;
	}
	else
	{
		return 0;
	}
}

static int Utf16leGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode)
{
	if (pucBufStart + 1 < pucBufEnd)
	{
		*pdwCode = (((unsigned int)pucBufStart[1])<<8) + pucBufStart[0];
		return 2;
	}
	else
	{
		/* 文件结束 */
		return 0;
	}
}

int  Utf16leEncodingInit(void)
{
	AddFontOprForEncoding(&g_tUtf16leEncodingOpr, GetFontOpr("freetype"));
	AddFontOprForEncoding(&g_tUtf16leEncodingOpr, GetFontOpr("ascii"));
	return RegisterEncodingOpr(&g_tUtf16leEncodingOpr);
}

#include <config.h>
#include <encoding_manager.h>
#include <string.h>

static int isUtf16beCoding(unsigned char *pucBufHead);
static int Utf16beGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode);

static T_EncodingOpr g_tUtf16beEncodingOpr = {
	.name          = "utf-16be",
	.iHeadLen	   = 2,
	.isSupport     = isUtf16beCoding,
	.GetCodeFrmBuf = Utf16beGetCodeFrmBuf,
};

static int isUtf16beCoding(unsigned char *pucBufHead)
{
	const char aStrUtf16be[] = {0xFE, 0xFF, 0};
	
	if (strncmp((const char*)pucBufHead, aStrUtf16be, 2) == 0)
	{
		/* UTF-16 big endian */
		return 1;
	}
	else
	{
		return 0;
	}
}

static int Utf16beGetCodeFrmBuf(unsigned char *pucBufStart, unsigned char *pucBufEnd, unsigned int *pdwCode)
{
	if (pucBufStart + 1 < pucBufEnd)
	{
		*pdwCode = (((unsigned int)pucBufStart[0])<<8) + pucBufStart[1];
		return 2;
	}
	else
	{
		/* 文件结束 */
		return 0;
	}
}

int  Utf16beEncodingInit(void)
{
	AddFontOprForEncoding(&g_tUtf16beEncodingOpr, GetFontOpr("freetype"));
	AddFontOprForEncoding(&g_tUtf16beEncodingOpr, GetFontOpr("ascii"));
	return RegisterEncodingOpr(&g_tUtf16beEncodingOpr);
}

#include <config.h>
#include <fonts_manager.h>
#include <string.h>

static PT_FontOpr g_ptFontOprHead = NULL;

int RegisterFontOpr(PT_FontOpr ptFontOpr)
{
	PT_FontOpr ptTmp;

	if (!g_ptFontOprHead)
	{
		g_ptFontOprHead   = ptFontOpr;
		ptFontOpr->ptNext = NULL;
	}
	else
	{
		ptTmp = g_ptFontOprHead;
		while (ptTmp->ptNext)
		{
			ptTmp = ptTmp->ptNext;
		}
		ptTmp->ptNext     = ptFontOpr;
		ptFontOpr->ptNext = NULL;
	}

	return 0;
}


void ShowFontOpr(void)
{
	int i = 0;
	PT_FontOpr ptTmp = g_ptFontOprHead;

	while (ptTmp)
	{
		printf("%02d %s\n", i++, ptTmp->name);
		ptTmp = ptTmp->ptNext;
	}
}

PT_FontOpr GetFontOpr(char *pcName)
{
	PT_FontOpr ptTmp = g_ptFontOprHead;
	
	while (ptTmp)
	{
		if (strcmp(ptTmp->name, pcName) == 0)
		{
			return ptTmp;
		}
		ptTmp = ptTmp->ptNext;
	}
	return NULL;
}


int FontsInit(void)
{
	int iError;
	
	iError = ASCIIInit();
	if (iError)
	{
		DBG_PRINTF("ASCIIInit error!\n");
		return -1;
	}

	iError = GBKInit();
	if (iError)
	{
		DBG_PRINTF("GBKInit error!\n");
		return -1;
	}
	
	iError = FreeTypeInit();
	if (iError)
	{
		DBG_PRINTF("FreeTypeInit error!\n");
		return -1;
	}

	return 0;
}

#include <config.h>
#include <fonts_manager.h>

#define FONTDATAMAX 4096

static int ASCIIFontInit(char *pcFontFile, unsigned int dwFontSize);
static int ASCIIGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap);

static T_FontOpr g_tASCIIFontOpr = {
	.name          = "ascii",
	.FontInit      = ASCIIFontInit,
	.GetFontBitmap = ASCIIGetFontBitmap,
};


static const unsigned char fontdata_8x16[FONTDATAMAX] = {

....
};
static int ASCIIFontInit(char *pcFontFile, unsigned int dwFontSize)
{
	if (dwFontSize != 16)
	{
		//DBG_PRINTF("ASCII can‘t support %d font size\n", dwFontSize);
		return -1;
	}
	return 0;
}

static int ASCIIGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap)
{
	int iPenX = ptFontBitMap->iCurOriginX;
	int iPenY = ptFontBitMap->iCurOriginY;
	
	if (dwCode > (unsigned int)0x80)
	{
		//DBG_PRINTF("don‘t support this code : 0x%x\n", dwCode);
		return -1;
	}

	ptFontBitMap->iXLeft    = iPenX;
	ptFontBitMap->iYTop     = iPenY - 16;
	ptFontBitMap->iXMax     = iPenX + 8;
	ptFontBitMap->iYMax     = iPenY;
	ptFontBitMap->iBpp      = 1;
	ptFontBitMap->iPitch    = 1;
	ptFontBitMap->pucBuffer = (unsigned char *)&fontdata_8x16[dwCode * 16];;	

	ptFontBitMap->iNextOriginX = iPenX + 8;
	ptFontBitMap->iNextOriginY = iPenY;
	
	return 0;
}

int ASCIIInit(void)
{
	return RegisterFontOpr(&g_tASCIIFontOpr);
}

#include <config.h>
#include <fonts_manager.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>


static int GBKFontInit(char *pcFontFile, unsigned int dwFontSize);
static int GBKGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap);

static T_FontOpr g_tGBKFontOpr = {
	.name          = "gbk",
	.FontInit      = GBKFontInit,
	.GetFontBitmap = GBKGetFontBitmap,
};

static int g_iFdHZK;
static unsigned char *g_pucHZKMem;
static unsigned char *g_pucHZKMemEnd;

static int GBKFontInit(char *pcFontFile, unsigned int dwFontSize)
{
	struct stat tStat;

	if (16 != dwFontSize)
	{
		DBG_PRINTF("GBK can‘t support %d fontsize\n", dwFontSize);
		return -1;
	}
	
	g_iFdHZK = open(pcFontFile, O_RDONLY);
	if (g_iFdHZK < 0)
	{
		DBG_PRINTF("can‘t open %s\n", pcFontFile);
		return -1;
	}
	if(fstat(g_iFdHZK, &tStat))
	{
		DBG_PRINTF("can‘t get fstat\n");
		return -1;
	}
	g_pucHZKMem = (unsigned char *)mmap(NULL , tStat.st_size, PROT_READ, MAP_SHARED, g_iFdHZK, 0);
	if (g_pucHZKMem == (unsigned char *)-1)
	{
		DBG_PRINTF("can‘t mmap for hzk16\n");
		return -1;
	}
	g_pucHZKMemEnd = g_pucHZKMem + tStat.st_size;
	return 0;
}

static int GBKGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap)
{
	int iArea;
	int iWhere;

	int iPenX = ptFontBitMap->iCurOriginX;
	int iPenY = ptFontBitMap->iCurOriginY;

	DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);

	if (dwCode & 0xffff0000)
	{
		DBG_PRINTF("don‘t support this code : 0x%x\n", dwCode);
		return -1;
	}	

	iArea  = (int)(dwCode & 0xff) - 0xA1;
	iWhere = (int)((dwCode >> 8) & 0xff) - 0xA1;

	if ((iArea < 0) || (iWhere < 0))
	{
		DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
		return -1;
	}
	
	ptFontBitMap->iXLeft    = iPenX;
	ptFontBitMap->iYTop     = iPenY - 16;
	ptFontBitMap->iXMax     = iPenX + 16;
	ptFontBitMap->iYMax     = iPenY;
	ptFontBitMap->iBpp      = 1;
	ptFontBitMap->iPitch    = 2;
	ptFontBitMap->pucBuffer = g_pucHZKMem + (iArea * 94 + iWhere)*32;;	

	if (ptFontBitMap->pucBuffer >= g_pucHZKMemEnd)
	{
		return -1;
	}

	ptFontBitMap->iNextOriginX = iPenX + 16;
	ptFontBitMap->iNextOriginY = iPenY;
	
	DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
	return 0;
}

int GBKInit(void)
{
	return RegisterFontOpr(&g_tGBKFontOpr);
}

#include <config.h>
#include <fonts_manager.h>

#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H

static int FreeTypeFontInit(char * pcFontFile, unsigned int dwFontSize);
static int FreeTypeGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap);

static FT_Library	g_tLibrary;
static FT_Face		g_tFace;
static FT_GlyphSlot	g_tSlot;
#if 0
typedef struct FontBitMap {
	int iXLeft;
	int iYTop;
	int iXMax;
	int iYMax;
	int iBpp;
	int iPitch;
	int iCurOriginX;
	int iCurOriginY;
	unsigned char *pucBuffer;
}T_FontBitMap, *PT_FontBitMap;
typedef struct FontOpr {
	char *name;
	int    (*FontInit)(char *pcFontFile, unsigned int dwFontSize);
	int    (*GetFontBitmap)(unsigned int dwCode, PT_FontBitMap ptFontBitMap);
	struct FontOpr *ptNext;
}T_FontOpr, *PT_DispOpr;
#endif

static T_FontOpr g_tFreeTypeFontOpr = {
	.name 			= "freetype",
	.FontInit 			= FreeTypeFontInit,
	.GetFontBitmap 	= FreeTypeGetFontBitmap,
};
static int FreeTypeFontInit(char * pcFontFile, unsigned int dwFontSize)
{
	int iError;
	iError = FT_Init_FreeType( &g_tLibrary );              /* initialize library */
	if(iError)
	{
		DBG_PRINTF("FT_Init_FreeType failed\n");
		return -1;
	}
	 iError = FT_New_Face( g_tLibrary,pcFontFile, 0, &g_tFace ); /* create face object */
	 if(iError)
	{
		DBG_PRINTF("FT_New_Face failed\n");
		return -1;
	}
	 
	  g_tSlot = g_tFace->glyph;
	  
	iError = FT_Set_Pixel_Sizes(g_tFace, dwFontSize, 0);	
	 if(iError)
	{
		DBG_PRINTF("FT_Set_Pixel_Sizes failed\n");
		return -1;
	}
	return 0;

}
static  int FreeTypeGetFontBitmap(unsigned int dwCode, PT_FontBitMap ptFontBitMap)
{
	int iError;
	iError = FT_Load_Char(g_tFace, dwCode, FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
	if(iError)
	{
		DBG_PRINTF("FT_Load_Char failed\n");
		return -1;		
	}
	/*笛卡尔坐标到LCD 坐标转换*/
	ptFontBitMap->iXLeft 	= ptFontBitMap->iCurOriginX + g_tSlot->bitmap_left;
	ptFontBitMap->iYTop 	= ptFontBitMap->iCurOriginY - g_tSlot->bitmap_top;
	ptFontBitMap->iXMax 	= ptFontBitMap->iXLeft + g_tSlot->bitmap.width;
	ptFontBitMap->iYMax 	= ptFontBitMap->iYTop + g_tSlot->bitmap.rows;
	/*一位表示一像素*/
	ptFontBitMap->iBpp	= 1;
	ptFontBitMap->iPitch	= g_tSlot->bitmap.pitch;
	ptFontBitMap->iNextOriginX	= ptFontBitMap->iCurOriginX + g_tSlot->advance.x/64;
	ptFontBitMap->iNextOriginY	= ptFontBitMap->iCurOriginY;
	ptFontBitMap->pucBuffer	= g_tSlot->bitmap.buffer;
	return 0;
}

int FreeTypeInit(void)
{
	return RegisterFontOpr(&g_tFreeTypeFontOpr);

}

#include <config.h>
#include <disp_manager.h>
#include <string.h>

static PT_DispOpr g_ptDispOprHead;

int RegisterDispOpr(PT_DispOpr ptDispOpr)
{
	PT_DispOpr ptTmp;

	if (!g_ptDispOprHead)
	{
		g_ptDispOprHead   = ptDispOpr;
		ptDispOpr->ptNext = NULL;
	}
	else
	{
		ptTmp = g_ptDispOprHead;
		while (ptTmp->ptNext)
		{
			ptTmp = ptTmp->ptNext;
		}
		ptTmp->ptNext	  = ptDispOpr;
		ptDispOpr->ptNext = NULL;
	}

	return 0;
}


void ShowDispOpr(void)
{
	int i = 0;
	PT_DispOpr ptTmp = g_ptDispOprHead;

	while (ptTmp)
	{
		printf("%02d %s\n", i++, ptTmp->name);
		ptTmp = ptTmp->ptNext;
	}
}

PT_DispOpr GetDispOpr(char *pcName)
{
	PT_DispOpr ptTmp = g_ptDispOprHead;
	
	while (ptTmp)
	{
		if (strcmp(ptTmp->name, pcName) == 0)
		{
			return ptTmp;
		}
		ptTmp = ptTmp->ptNext;
	}
	return NULL;
}

int DisplayInit(void)
{
	int iError;
	
	iError = FBInit();

	return iError;
}

#include <config.h>
#include <disp_manager.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/fb.h>
#include <string.h>

/*构造、设置、注册结构体采用面向对象的思想*/
#if 0
typedef struct DispOpr {
	char* name;
	int	 iXres;
	int 	 iYres;
	int 	 iBpp;
	int	 (*ShowPixel)(int iPenX, int iPenY, unsigned int dwColor);
	int 	 (*CleanScreen)(unsigned int dwBackColor);
	int 	 (*DeviceInit)(void);
	struct DispOpr *ptNext;
}T_DispOpr, *PT_DispOpr;

int RegisterDispOpr(PT_DispOpr ptDispOpr);
void ShowDispOpr(void);
int 	DisplayInit(void);
int	FBInit(void);
#endif
static int FBDeviceInit(void);
static int FBShowPixel(int iX, int iY, unsigned int dwColor);
static int FBCleanScreen(unsigned int dwBackColor);


static T_DispOpr g_tFBOpr = {
	.name = "fb",
	.DeviceInit = FBDeviceInit,
	.ShowPixel = FBShowPixel,
	.CleanScreen = FBCleanScreen,
};

static int g_iFBFd;

static  struct fb_var_screeninfo  g_tFBVar;
static  struct fb_fix_screeninfo   g_tFBFix;

static unsigned int g_dwScreenSize;
static unsigned int g_dwLineWidth;
static unsigned int g_dwPixelWidth;
static unsigned char * g_pucFBMem;

static int FBDeviceInit(void)
{
	g_iFBFd = open(FB_DEVICE_NAME,O_RDWR);
	if(g_iFBFd < 0)
	{
		DBG_PRINTF("open /dev/fb0 failed\n");
		return -1;
	}
	
	if (ioctl(g_iFBFd, FBIOGET_VSCREENINFO, &g_tFBVar))
	{
		DBG_PRINTF("get var information failed\n");
		return -1;
	}
	if (ioctl(g_iFBFd, FBIOGET_FSCREENINFO, &g_tFBFix))
	{
		DBG_PRINTF("get fix information failed\n");
		return -1;
	}
	
	g_tFBOpr.iXres =  g_tFBVar.xres; 
	g_tFBOpr.iYres =  g_tFBVar.yres;
	g_tFBOpr.iBpp  =  g_tFBVar.bits_per_pixel;
	
	g_dwScreenSize =  g_tFBVar.xres * g_tFBVar.yres *  g_tFBVar.bits_per_pixel /8;
	g_dwLineWidth   =  g_tFBVar.xres *  g_tFBVar.bits_per_pixel /8;
	g_dwPixelWidth  =  g_tFBVar.bits_per_pixel /8;
	g_pucFBMem      =  (unsigned char *)mmap(NULL , g_dwScreenSize, PROT_READ | PROT_WRITE, MAP_SHARED, g_iFBFd, 0);
	
	if(g_pucFBMem == (unsigned char *)-1)
	{
		DBG_PRINTF("g_pucFBMem mmap failed\n ");
		return -1;
	}
	return 0;
}
static int FBShowPixel(int iPenX, int iPenY, unsigned int dwColor)
{
	unsigned char *pucFB8pp = (unsigned char*)(g_pucFBMem+iPenY*g_dwLineWidth+iPenX*g_dwPixelWidth);
	unsigned short *pwFB16pp;
	unsigned int *pdwFB32pp;
	
	pwFB16pp = (unsigned short*)pucFB8pp;
	pdwFB32pp = (unsigned int*)pucFB8pp;
	
	unsigned char red,green,blue;

	/*0xRRGGBB*/
	switch( g_tFBVar.bits_per_pixel)
	{
		case 8:
			*pucFB8pp = dwColor;
			break;
		case 16:
			red 	   		=  (dwColor >>16)&0xff;
			green  		=  (dwColor>>8)&0xff;
			blue    		=  (dwColor>>0)&0xff;
			dwColor   	= ((red>>3)<<11)|((green>>2)<<5)|((blue>>3)<<0);
			*pwFB16pp	= dwColor;
			break;
		case 32:
			*pdwFB32pp 	= dwColor;
			break;
		default:
			DBG_PRINTF("Can‘ support  error\n");
			return -1;
	}
	return 0;
}

static int FBCleanScreen(unsigned int dwBackColor)
{
	unsigned char *pucFB8pp = (unsigned char*)(g_pucFBMem);
	unsigned short *pwFB16pp;
	unsigned int *pdwFB32pp;
	
	pwFB16pp = (unsigned short*)pucFB8pp;
	pdwFB32pp = (unsigned int*)pucFB8pp;
	
	unsigned char red,green,blue;
	int i = 0;
	/*0xRRGGBB*/
	switch(g_tFBVar.bits_per_pixel)
	{
		case 8:
			memset(g_pucFBMem, dwBackColor, g_dwScreenSize);
			break;
		case 16:
			red 	   		=  (dwBackColor >>16)&0xff;
			green  		=  (dwBackColor>>8)&0xff;
			blue    		=  (dwBackColor>>0)&0xff;
			dwBackColor   = ((red>>3)<<11)|((green>>2)<<5)|((blue>>3)<<0);
			while(i < g_dwScreenSize)
			{
				*pwFB16pp  = dwBackColor;
				pwFB16pp++;
				i +=2;

			}	
			break;
		case 32:
			while(i < g_dwScreenSize)
			{
				*pdwFB32pp  = dwBackColor;
				pdwFB32pp++;
				i += 4;

			}	
			break;
		default:
			DBG_PRINTF("Can‘ support  %d bpp\n",g_tFBDispOpr.iBpp);
			return -1;
	}
	return 0;	
}

int FBInit(void)
{
	return RegisterDispOpr(&g_tFBOpr);
}

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <config.h>
#include <draw.h>
#include <encoding_manager.h>
#include <fonts_manager.h>
#include <disp_manager.h>
#include <string.h>


typedef struct PageDesc {
	int iPage;
	unsigned char *pucLcdFirstPosAtFile;
	unsigned char *pucLcdNextPageFirstPosAtFile;
	struct PageDesc *ptPrePage;
	struct PageDesc *ptNextPage;
} T_PageDesc, *PT_PageDesc;

static int g_iFdTextFile;
static unsigned char *g_pucTextFileMem;
static unsigned char *g_pucTextFileMemEnd;
static PT_EncodingOpr g_ptEncodingOprForFile;

static PT_DispOpr g_ptDispOpr;

static unsigned char *g_pucLcdFirstPosAtFile;
static unsigned char *g_pucLcdNextPosAtFile;

static int g_dwFontSize;

static PT_PageDesc g_ptPages   = NULL;
static PT_PageDesc g_ptCurPage = NULL;


int OpenTextFile(char *pcFileName)
{
	struct stat tStat;

	g_iFdTextFile = open(pcFileName, O_RDONLY);
	if (0 > g_iFdTextFile)
	{
		DBG_PRINTF("can‘t open text file %s\n", pcFileName);
		return -1;
	}

	if(fstat(g_iFdTextFile, &tStat))
	{
		DBG_PRINTF("can‘t get fstat\n");
		return -1;
	}
	g_pucTextFileMem = (unsigned char *)mmap(NULL , tStat.st_size, PROT_READ, MAP_SHARED, g_iFdTextFile, 0);
	if (g_pucTextFileMem == (unsigned char *)-1)
	{
		DBG_PRINTF("can‘t mmap for text file\n");
		return -1;
	}

	/* 自注释 */
	g_pucTextFileMemEnd = g_pucTextFileMem + tStat.st_size;
	
	g_ptEncodingOprForFile = SelectEncodingOprForFile(g_pucTextFileMem);

	if (g_ptEncodingOprForFile)
	{
		g_pucLcdFirstPosAtFile = g_pucTextFileMem + g_ptEncodingOprForFile->iHeadLen;
		return 0;
	}
	else
	{
		return -1;
	}

}


int SetFontsDetail(char *pcHZKFile, char *pcFileFreetype, unsigned int dwFontSize)
{
	int iError = 0;
	PT_FontOpr ptFontOpr;
	PT_FontOpr ptTmp;
	int iRet = -1;

	g_dwFontSize = dwFontSize;
	

	ptFontOpr = g_ptEncodingOprForFile->ptFontOprSupportedHead;
	while (ptFontOpr)
	{
		if (strcmp(ptFontOpr->name, "ascii") == 0)
		{
			iError = ptFontOpr->FontInit(NULL, dwFontSize);
		}
		else if (strcmp(ptFontOpr->name, "gbk") == 0)
		{
			iError = ptFontOpr->FontInit(pcHZKFile, dwFontSize);
		}
		else
		{
			iError = ptFontOpr->FontInit(pcFileFreetype, dwFontSize);
		}

		DBG_PRINTF("%s, %d\n", ptFontOpr->name, iError);

		ptTmp = ptFontOpr->ptNext;

		if (iError == 0)
		{
			/* 比如对于ascii编码的文件, 可能用ascii字体也可能用gbk字体, 
			 * 所以只要有一个FontInit成功, SetTextDetail最终就返回成功
			 */
			iRet = 0;
		}
		else
		{
			DelFontOprFrmEncoding(g_ptEncodingOprForFile, ptFontOpr);
		}
		ptFontOpr = ptTmp;
	}
	return iRet;
}

int SelectAndInitDisplay(char *pcName)
{
	int iError;
	g_ptDispOpr = GetDispOpr(pcName);/*获取显示设备*/
	if (!g_ptDispOpr)
	{
		return -1;
	}

	iError = g_ptDispOpr->DeviceInit();     /*显示设备初始化*/
	return iError;
}
/*由于用到LCD 的分辨率，所有要在SelectAndInitDisplay 之后作用*/
int GetDispResolution(int *piXres, int *piYres)
{
	if (g_ptDispOpr)
	{
		*piXres = g_ptDispOpr->iXres;
		*piYres = g_ptDispOpr->iYres;
		return 0;
	}
	else
	{
		return -1;
	}
}

int IncLcdX(int iX)
{
	if (iX + 1 < g_ptDispOpr->iXres)
		return (iX + 1);
	else
		return 0;
}

int IncLcdY(int iY)
{
	if (iY + g_dwFontSize < g_ptDispOpr->iYres)
		return (iY + g_dwFontSize);
	else
		return 0;
}

int RelocateFontPos(PT_FontBitMap ptFontBitMap)
{
	int iLcdY;
	int iDeltaX;
	int iDeltaY;

	if (ptFontBitMap->iYMax > g_ptDispOpr->iYres)
	{
		/* 满页了 */
		return -1;
	}

	/* 超过LCD最右边 */
	if (ptFontBitMap->iXMax > g_ptDispOpr->iXres)
	{
		/* 换行 */		
		iLcdY = IncLcdY(ptFontBitMap->iCurOriginY);
		if (0 == iLcdY)
		{
			/* 满页了 */
			return -1;
		}
		else
		{
			/* 没满页 */
			iDeltaX = 0 - ptFontBitMap->iCurOriginX;
			iDeltaY = iLcdY - ptFontBitMap->iCurOriginY;

			ptFontBitMap->iCurOriginX  += iDeltaX;
			ptFontBitMap->iCurOriginY  += iDeltaY;

			ptFontBitMap->iNextOriginX += iDeltaX;
			ptFontBitMap->iNextOriginY += iDeltaY;

			ptFontBitMap->iXLeft += iDeltaX;
			ptFontBitMap->iXMax  += iDeltaX;

			ptFontBitMap->iYTop  += iDeltaY;
			ptFontBitMap->iYMax  += iDeltaY;;
			
			return 0;	
		}
	}
	
	return 0;
}

int ShowOneFont(PT_FontBitMap ptFontBitMap)
{
	int x;
	int y;
	unsigned char ucByte = 0;
	int i = 0;
	int bit;
	
	if (ptFontBitMap->iBpp == 1)
	{
		for (y = ptFontBitMap->iYTop; y < ptFontBitMap->iYMax; y++)
		{
			i = (y - ptFontBitMap->iYTop) * ptFontBitMap->iPitch;
			for (x = ptFontBitMap->iXLeft, bit = 7; x < ptFontBitMap->iXMax; x++)
			{
				if (bit == 7)
				{
					ucByte = ptFontBitMap->pucBuffer[i++];
				}
				
				if (ucByte & (1<<bit))
				{
					g_ptDispOpr->ShowPixel(x, y, COLOR_FOREGROUND);
				}
				else
				{
					/* 使用背景色, 不用描画 */
					// g_ptDispOpr->ShowPixel(x, y, 0); /* 黑 */
				}
				bit--;
				if (bit == -1)
				{
					bit = 7;
				}
			}
		}
	}
	else if (ptFontBitMap->iBpp == 8)
	{
		for (y = ptFontBitMap->iYTop; y < ptFontBitMap->iYMax; y++)
			for (x = ptFontBitMap->iXLeft; x < ptFontBitMap->iXMax; x++)
			{
				//g_ptDispOpr->ShowPixel(x, y, ptFontBitMap->pucBuffer[i++]);
				if (ptFontBitMap->pucBuffer[i++])
					g_ptDispOpr->ShowPixel(x, y, COLOR_FOREGROUND);
			}
	}
	else
	{
		DBG_PRINTF("ShowOneFont error, can‘t support %d bpp\n", ptFontBitMap->iBpp);
		return -1;
	}
	return 0;
}

int ShowOnePage(unsigned char *pucTextFileMemCurPos)
{
	int iLen;
	int iError;
	unsigned char *pucBufStart;
	unsigned int dwCode;
	PT_FontOpr ptFontOpr;
	T_FontBitMap tFontBitMap;
	
	int bHasNotClrSceen = 1;
	int bHasGetCode = 0;

	tFontBitMap.iCurOriginX = 0;
	tFontBitMap.iCurOriginY = g_dwFontSize;
	pucBufStart = pucTextFileMemCurPos;

	
	while (1)
	{
		iLen = g_ptEncodingOprForFile->GetCodeFrmBuf(pucBufStart, g_pucTextFileMemEnd, &dwCode);
		if (0 == iLen)
		{
			/* 文件结束 */
			if (!bHasGetCode)
			{
				return -1;
			}
			else
			{
				return 0;
			}
		}

		bHasGetCode = 1;
		
		pucBufStart += iLen;

		/* 有些文本, \n\r两个一起才表示回车换行
		 * 碰到这种连续的\n\r, 只处理一次
		 */
		if (dwCode == ‘\n‘)
		{
			g_pucLcdNextPosAtFile = pucBufStart;
			
			/* 回车换行 */
			tFontBitMap.iCurOriginX = 0;
			tFontBitMap.iCurOriginY = IncLcdY(tFontBitMap.iCurOriginY);
			if (0 == tFontBitMap.iCurOriginY)
			{
				/* 显示完当前一屏了 */
				return 0;
			}
			else
			{
				continue;
			}
		}
		else if (dwCode == ‘\r‘)
		{
			continue;
		}
		else if (dwCode == ‘\t‘)
		{
			/* TAB键用一个空格代替 */
			dwCode = ‘ ‘;
		}

		DBG_PRINTF("dwCode = 0x%x\n", dwCode);
		
		ptFontOpr = g_ptEncodingOprForFile->ptFontOprSupportedHead;
		while (ptFontOpr)
		{
			DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
			iError = ptFontOpr->GetFontBitmap(dwCode, &tFontBitMap);
			DBG_PRINTF("%s %s %d, ptFontOpr->name = %s, %d\n", __FILE__, __FUNCTION__, __LINE__, ptFontOpr->name, iError);
			if (0 == iError)
			{
				DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
				if (RelocateFontPos(&tFontBitMap))
				{
					/* 剩下的LCD空间不能满足显示这个字符 */
					return 0;
				}
				DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);

				if (bHasNotClrSceen)
				{
					/* 首先清屏 */
					g_ptDispOpr->CleanScreen(COLOR_BACKGROUND);
					bHasNotClrSceen = 0;
				}
				DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
				/* 显示一个字符 */
				if (ShowOneFont(&tFontBitMap))
				{
					return -1;
				}
				
				tFontBitMap.iCurOriginX = tFontBitMap.iNextOriginX;
				tFontBitMap.iCurOriginY = tFontBitMap.iNextOriginY;
				g_pucLcdNextPosAtFile = pucBufStart;

				/* 继续取出下一个编码来显示 */
				break;
			}
			ptFontOpr = ptFontOpr->ptNext;
		}		
	}

	return 0;
}

static void RecordPage(PT_PageDesc ptPageNew)
{
	PT_PageDesc ptPage;
		
	if (!g_ptPages)
	{
		g_ptPages = ptPageNew;
	}
	else
	{
		ptPage = g_ptPages;
		while (ptPage->ptNextPage)
		{
			ptPage = ptPage->ptNextPage;
		}
		ptPage->ptNextPage   = ptPageNew;
		ptPageNew->ptPrePage = ptPage;
	}
}

int ShowNextPage(void)
{
	int iError;
	PT_PageDesc ptPage;
	unsigned char *pucTextFileMemCurPos;

	if (g_ptCurPage)
	{
		pucTextFileMemCurPos = g_ptCurPage->pucLcdNextPageFirstPosAtFile;
	}
	else
	{
		pucTextFileMemCurPos = g_pucLcdFirstPosAtFile;
	}
	iError = ShowOnePage(pucTextFileMemCurPos);
	DBG_PRINTF("%s %d, %d\n", __FUNCTION__, __LINE__, iError);
	if (iError == 0)
	{
		if (g_ptCurPage && g_ptCurPage->ptNextPage)
		{
			g_ptCurPage = g_ptCurPage->ptNextPage;
			return 0;
		}
		
		ptPage = malloc(sizeof(T_PageDesc));
		if (ptPage)
		{
			ptPage->pucLcdFirstPosAtFile         = pucTextFileMemCurPos;
			ptPage->pucLcdNextPageFirstPosAtFile = g_pucLcdNextPosAtFile;
			ptPage->ptPrePage                    = NULL;
			ptPage->ptNextPage                   = NULL;
			g_ptCurPage = ptPage;
			DBG_PRINTF("%s %d, pos = 0x%x\n", __FUNCTION__, __LINE__, (unsigned int)ptPage->pucLcdFirstPosAtFile);
			RecordPage(ptPage);
			return 0;
		}
		else
		{
			return -1;
		}
	}
	return iError;
}

int ShowPrePage(void)
{
	int iError;

	DBG_PRINTF("%s %d\n", __FUNCTION__, __LINE__);
	if (!g_ptCurPage || !g_ptCurPage->ptPrePage)
	{
		return -1;
	}

	DBG_PRINTF("%s %d, pos = 0x%x\n", __FUNCTION__, __LINE__, (unsigned int)g_ptCurPage->ptPrePage->pucLcdFirstPosAtFile);
	iError = ShowOnePage(g_ptCurPage->ptPrePage->pucLcdFirstPosAtFile);
	if (iError == 0)
	{
		DBG_PRINTF("%s %d\n", __FUNCTION__, __LINE__);
		g_ptCurPage = g_ptCurPage->ptPrePage;
	}
	return iError;
}


int DrawInit(void)
{
	int iError;
	iError = DisplayInit();
	if (iError)
	{
		printf("DisplayInit error!\n");
		return -1;
	}

	iError = FontsInit();
	if (iError)
	{
		printf("FontsInit error!\n");
		return -1;
	}

	iError = EncodingInit();
	if (iError)
	{
		printf("EncodingInit error!\n");
		return -1;
	}
    iError = InputInit();
    if (iError)
    {
        printf("InputInit error!\n");
        return -1;
    }
    return 0;
}

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <config.h>
#include <draw.h>  
#include <encoding_manager.h>
#include <fonts_manager.h>
#include <disp_manager.h>
#include <input_manager.h>
#include <string.h>


/* ./show_file [-s Size] [-f freetype_font_file] [-h HZK] <text_file> */
int main(int argc, char **argv)
{
	int iError;
	unsigned int dwFontSize = 16;
	char acHzkFile[128];
	char acFreetypeFile[128];
	char acTextFile[128];

	char acDisplay[128];

	char cOpr;
	int bList = 0;

	T_InputEvent tInputEvent;

	acHzkFile[0]  = ‘\0‘;
	acFreetypeFile[0] = ‘\0‘;
	acTextFile[0] = ‘\0‘;

	strcpy(acDisplay, "fb");
	
	while ((iError = getopt(argc, argv, "ls:f:h:d:")) != -1)
	{
		/* 选项 : ./show_file -l */
		switch(iError)
		{
			case ‘l‘:
			{
				  bList = 1;
				  break;
			}
			case ‘s‘:
			{
				  dwFontSize = strtoul(optarg, NULL, 0);
				  break;
			}
			case ‘f‘:
			{
				  strncpy(acFreetypeFile, optarg, 128);
				  acFreetypeFile[127] = ‘\0‘;
				  break;
			}			
			case ‘h‘:
			{
					strncpy(acHzkFile, optarg, 128);
					acHzkFile[127] = ‘\0‘;
					break;
			}
			case ‘d‘:
			{
				strncpy(acDisplay, optarg, 128);
				acDisplay[127] = ‘\0‘;
				break;
			}
			default:
			{
					printf("Usage: %s [-s Size] [-d display] [-f font_file] [-h HZK] <text_file>\n", argv[0]);
					printf("Usage: %s -l\n", argv[0]);
					return -1;
					break;
			}
		}
	}

	if (!bList && (optind >= argc))
	{
		printf("Usage: %s [-s Size] [-d display] [-f font_file] [-h HZK] <text_file>\n", argv[0]);
		printf("Usage: %s -l\n", argv[0]);
		return -1;
	}
/*DrawInit 函 数实现DisplayInit 、FontsInit、EncodingInit、InputInit*/
	iError = DrawInit();
	if (iError)
	{
		printf("DrawInit error!\n");
		return -1;
	}

/*  列出所支持的各项function*/		
	if (bList)
	{
		printf("supported display:\n");
		ShowDispOpr();

		printf("supported font:\n");
		ShowFontOpr();

		printf("supported encoding:\n");
		ShowEncodingOpr();

		printf("supported encoding:\n");
		ShowInputOpr();
		return 0;
	}

	strncpy(acTextFile, argv[optind], 128);
	acTextFile[127] = ‘\0‘;
/*打开文件*/	
	iError = OpenTextFile(acTextFile);
	if (iError)
	{
		printf("OpenTextFile error!\n");
		return -1;
	}
/*设置文本*/
	iError = SetFontsDetail(acHzkFile, acFreetypeFile, dwFontSize);
	if (iError)
	{
		printf("SetFontsDetail error!\n");
		return -1;
	}

	DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
/* 显示fb初始化*/
	iError = SelectAndInitDisplay(acDisplay);
	if (iError)
	{
		printf("SelectAndInitDisplay error!\n");
		return -1;
	}

/*输入设备初始化*/
	iError = AllInputDevicesInit();
	if (iError)
	{
		printf("AllInputDevicesInit error!\n");
		return -1;
	}
	
	DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
	iError = ShowNextPage();
	DBG_PRINTF("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
	if (iError)
	{
		printf("Error to show first page\n");
		return -1;
	}

	while (1)
	{
#if 0
		printf("Enter ‘n‘ to show next page, ‘u‘ to show previous page, ‘q‘ to exit: ");

		do {
			cOpr = getchar();			
		} while ((cOpr != ‘n‘) && (cOpr != ‘u‘) && (cOpr != ‘q‘));

		if (cOpr == ‘n‘)
		{
			ShowNextPage();
		}
		else if (cOpr == ‘u‘)
		{
			ShowPrePage();			
		}
		else 
		{
			return 0;
		}
#endif
 /*使用轮询的方式*/
	if (0 == GetInputEvent(&tInputEvent))
	{
		if(tInputEvent.iVal == INPUT_VALUE_DOWN)	
			ShowNextPage();
		if(tInputEvent.iVal == INPUT_VALUE_UP)	
			ShowPrePage();
		if(tInputEvent.iVal == INPUT_VALUE_EXIT)	
			return 0;
	}
      }
	return 0;
}

1 、实验方法:
a. insmod  s3c_ts.ko
   确定是哪个设备节点对应触摸屏
b.
export TSLIB_TSDEVICE=/dev/event0
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/lib/ts
export TSLIB_CONSOLEDEVICE=none
export TSLIB_FBDEVICE=/dev/fb0

c. 较准
ts_calibrate   

d. telnetd -l /bin/sh  //启动telnet服务，为了登录进去观察CPU占用率

e.  ./show_file -s 20 -f ./FZYTK.TTF ./utf8.txt

f. telnet上开发板执行top命令观察

结果如图所示：

说明，采用此种方法，CPU占用率很高

增加Input设备功能,布布扣,bubuko.com

增加Input设备功能

原文：http://blog.csdn.net/dream890527/article/details/21292503