openfile.h

C:新建文件夹ch4熵编码.rar是JGP文件编码的基础

#include "stdafx.h"
#include <stdio.h>

 
BYTE * OpenBMP(CString fileName,long *width,long *height)
{
	BYTE * pData;
	*width = 0;
	*height = 0;
	if(fileName=="")
		return NULL;

	BITMAPINFO bmpInfo;
	BITMAPFILEHEADER bmpFileHead;
	CFile file;
	if((file.Open(fileName,CFile::modeRead|CFile::shareDenyNone))==NULL)
	{
		AfxMessageBox("Can not open the file");
		return NULL;
	}
 
	file.Read(&bmpFileHead,sizeof(BITMAPFILEHEADER));
	file.Read(&bmpInfo,sizeof(BITMAPINFOHEADER));

	*width = bmpInfo.bmiHeader.biWidth;
 	*height = bmpInfo.bmiHeader.biHeight;
	long lFileSize = bmpFileHead.bfSize - bmpFileHead.bfOffBits;
	pData = (BYTE*)new char[lFileSize];
	if(!pData)
		return NULL;

 	file.ReadHuge(pData,lFileSize);
	file.Close();

 	return pData;

}
BYTE * OpenRAW(CString fileName,long *width,long *height)
{
	BYTE * pData;


	if(fileName=="")
		return FALSE;

	*width = 352;
	*height = 240;
 	long lFileSize = (*width) * (*height);
	pData = (BYTE*)new char[lFileSize];

	CFile file;
	if((file.Open(fileName,CFile::modeRead|CFile::shareDenyNone))==NULL)
	{
		AfxMessageBox("Can not open the file");
		return NULL;
	}
 	 
	if(!pData)
		return NULL;

 	file.ReadHuge(pData,lFileSize);
	file.Close();

	return pData;

}

BYTE * OpenGRAY(CString fileName,long *width,long *height)
{
	BYTE * pData;
	if(fileName=="")
		return FALSE;

	*width = 360;
	*height = 288;
 	long lFileSize = (*width) * (*height);
	pData = (BYTE*)new char[lFileSize];

	CFile file;
	if((file.Open(fileName,CFile::modeRead|CFile::shareDenyNone))==NULL)
	{
		AfxMessageBox("Can not open the file");
		return NULL;
	}
 	 
	if(!pData)
		return NULL;

 	file.ReadHuge(pData,lFileSize);
	file.Close();


	return pData;

}

BYTE * OpenSIF(CString fileName,long *width,long *height)
{
	BYTE * pData;
	if(fileName=="")
		return FALSE;

	*width = 352;
	*height = 240;
 	long lFileSize = (*width) * (*height);
	pData = (BYTE*)new char[lFileSize];

	CFile file;
	if((file.Open(fileName,CFile::modeRead|CFile::shareDenyNone))==NULL)
	{
		AfxMessageBox("Can not open the file");
		return NULL;
	}
 	 
	if(!pData)
		return NULL;

 	file.ReadHuge(pData,lFileSize);
	file.Close();


	return pData;

}