/*声明*/
#ifndef _CDIB_H
#define _CDIB_H
class CDib :public CObject{ //父类为CObject
public:
RGBQUAD*m_pRGB;
BYTE*m_pData;
UINT m_numberOfColors;
BOOL m_valid;
BITMAPFILEHEADER bitmapFileHeader;
BITMAPINFOHEADER *m_pBitmapInfoHeader;
BITMAPINFO *m_pBitmapInfo;
BYTE *pDib;
DWORD size;
public:
CDib();
~CDib();
char m_fileName[256];
char *GetFileName();
BOOL IsValid();
DWORD GetSize();
UNIT GetHight();
UINT GetNumberOfColors();
RGBQUAD *GetRGB();
BYTE *GetData();
BITMAPINFO *GetInfo();
WORD PaletteSize(LPBYTE lpDIB);
WORD DIBNumColors(LPBYTE lpDIB);
void SaveFile(const CString filename);
public();
void LoadFile(const char*dibFileName);
}
#include "Stdafx.h"
#include "CDib.h"
#include "windowsx.h"
CDib::CDib(){
size=0;
}
CDib::~CDib(){
GlobalFreePtr(m_pBitmapInfo);
}
void CDib::LoadFile(const char*dibFileName){
strcpy(m_fileName,dibFileName);
CFile dibFile(m_fileName,CFile::modeRead);
dibFile.Read((void*)&bitmapFileHeader,sizeof(BITMAPFILEHEADER));
if(bitmapFileHeader.bfType== ox4d42;){
DWORD fileLength=dibFile.GetLength();
size=fileLength-sizeof(BITMAPFILEHEADER);
pDib=(BYTE*)GlobalAllocPtr(GMEM_MOVEABLE,size);
dibFile.Read((void*)pDib,size);
dibFile.Close();
m_pBitmapInfo=(BITMAPINF0*)pDib;
m_pBitmapInfoHeader=(BITMAPINFOHEADER*)pDib;
m_pRGB=(RGBQUAD*)(pDib+m_pBitmapInfoHeader->biSize);
int m_numberOfColors=GetNumberOfColors();
if(m_pBitmapInfoHeader->biClrUsed==0)
m_pBitmapInfoHeader->biClrUsed=m_numberOfColors;
DWORD colorTableSize=m_numberOfColors*sizeof(RGBQUAD);
m_pData=pDib+m_pBitmapInfoHeader->biSize+colorTableSize;
if(m_pRGB==(RGBQUAD*)m_pData)
m_pRGB=NULL;
m_pBitmapInfoHeader->biSizeImage=GetSize();
m_valid=TRUE;
}
else{
m_valid=FALSE;
AfxMessageBox("This isn't a bitmap file!");
}
}
BOOL CDib::IsValid(){
return m_valid;
}
char *CDib::GetFileName(){
return m_fileName;
}
UINT CDib::GetWidth(){
return(UINT)m_pBitmapInfoHeader->biWidth;
}
UINT CDib::GetHeight(){
return(UINT)m_pBitmapInfoHeader->biHeight;
}
UINT CDib::GetSize(){
if(m_pbitmapInfoHeader->biSizeImage!=0)
return m_pBitmapInfoHeader->biSizeImage;
else{
DWORD height=(DWORD)GetHeight();
DWORD width=(DWORD)GetWidth();
return height*width;
}
}
UNIT CDib::GetNumberOfColors(){
int numberOfColors;
if((m_pBitmapInfoHeader->biClrUsed==0)&&(m_pBitmapInfoHeader->biBitCount
switch(m_pBitmapInfoHeader->biBitCount){
case1:
numberOfColors=2;
break;
case4:
numberOfColors=16;
break;
case8:
numberOfColors=256;
}
}else{
numberOfColors=(int)m_pBitmapInfoHeader->biClrUsed;
}
return numberOfColors;
}
BYTE*CDib::GetData(){
return m_pData;
}
RGBQUAD*CDib::GetRGB(){
return m_pRGB;
}
BITMAPINFO*CDib::GetInfo(){
return m_pBitmapInfo;
}
WORD CDib::PaletteSize(LPBYTE lpDIB){
return (DIBNumColors(lpDIB)*sizeof(RGBTRIPLE);
}
WORD CDib::DIBNumColors(LPBYTE lpDIB){
WORD wBitCount;
wBitCount=((LPBITMAPCOREHEADER)lpDIB)->bcBitCount;
switch(wBitCount){
case1:
return 2;
case4;
return 16;
case8:
return 256;
default:
return 0;
}
}
void CDib::SaveFile(const CString filename){
stcpy(m_fileName,filename);
CFile dibFile(m_fileName,CFile::modeCreate|CFile::modeWrite);
dibFile.Write((void*)&bitmapFileHeader,sizeof(BITMAPFILEHEADER));
dibFile.Write((void*)pDib,size);
dibFile.Close();
}
