Dib.cpp
资源名称:face.rar [点击查看]
上传用户:joy_gong
上传日期:2020-11-30
资源大小:459k
文件大小:4k
源码类别:
生物技术
开发平台:
Visual C++
- // Dib.cpp: implementation of the CDib class.
- //
- //////////////////////////////////////////////////////////////////////
- #include "StdAfx.h"
- #include "Dib.h"
- #ifdef _DEBUG
- #undef THIS_FILE
- static char THIS_FILE[]=__FILE__;
- #define new DEBUG_NEW
- #endif
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- CDib::CDib()
- {
- m_hDrawDib=NULL;
- m_pDib=NULL;
- }
- CDib::~CDib()
- {
- Close();
- }
- void CDib::Draw(CDC *pDC,int nWidth, int nHeight)
- {
- if(m_pDib!=NULL)
- {
- ASSERT(IsValid());
- DrawDibRealize(m_hDrawDib,pDC->GetSafeHdc(),TRUE);
- DrawDibDraw(m_hDrawDib,pDC->GetSafeHdc(),
- 0, //desktop left
- 0, //desktop top
- nWidth,
- nHeight,
- (BITMAPINFOHEADER *)m_pDib,
- (LPVOID) GetBits(),
- 0, //source left
- 0, //source top
- ((BITMAPINFOHEADER *)m_pDib)->biWidth,
- ((BITMAPINFOHEADER *)m_pDib)->biHeight,
- DDF_BACKGROUNDPAL);
- }
- }
- CSize CDib::GetSize()
- {
- return CSize(((BITMAPINFOHEADER *)m_pDib)->biWidth,
- ((BITMAPINFOHEADER *)m_pDib)->biHeight);
- }
- LONG CDib::GetWidth()
- {
- return ((BITMAPINFOHEADER *)m_pDib)->biWidth;
- }
- LONG CDib::GetHeight()
- {
- return ((BITMAPINFOHEADER *)m_pDib)->biHeight;
- }
- void CDib::Close()
- {
- if(m_hDrawDib!=NULL)
- {
- DrawDibClose(m_hDrawDib);
- m_hDrawDib=NULL;
- }
- if(m_pDib!=NULL)
- {
- delete m_pDib;
- m_pDib=NULL;
- }
- }
- BOOL CDib::Open(const char * pzFileName)
- {
- // BITMAPFILEHEADER bmpFileHeader;
- CFile file;
- int nBmpFileHeaderSize;
- Close();
- //drawdibopen initialize the diradib library and
- //returns a handle for all drawdib operations
- if(!(m_hDrawDib=DrawDibOpen()))
- goto exit;
- //open and read the DIB file header
- nBmpFileHeaderSize=sizeof(BITMAPFILEHEADER);
- if(!file.Open(pzFileName,CFile::modeRead | CFile::typeBinary))
- goto exit;
- if(file.Read((void *)&bmpFileHeader,nBmpFileHeaderSize)!=(UINT)nBmpFileHeaderSize)
- goto failure;
- //validate the DIB file header by checking the first
- //two characters for the signature "BM"
- if(bmpFileHeader.bfType!=*((WORD *)"BM"))
- goto failure;
- //allocate a big chuck of global memory to store the DIB
- m_pDib=(BYTE *)new char [bmpFileHeader.bfSize-nBmpFileHeaderSize];
- //allocate memory fail
- if(!m_pDib)
- goto failure;
- //read the dib into the buffer at a time using ReadHuge
- file.ReadHuge(m_pDib,bmpFileHeader.bfSize-nBmpFileHeaderSize);
- if(((BITMAPINFOHEADER *)m_pDib)->biSizeImage==0)
- {
- //the application that create this bitmap didn't fill
- //in the biSizeImage field. Let's fill it
- //in even though the DrawDib * functions don't need it.
- BITMAPINFOHEADER *pDib=(BITMAPINFOHEADER *)m_pDib;
- //scan lines must be DWord aligned, hence the strange bit stuff
- pDib->biSizeImage=((((pDib->biWidth*pDib->biBitCount)+31)&~31)>>3)*pDib->biHeight;
- }
- m_pDibBits=GetBits();
- file.Close();
- return TRUE;
- failure:
- file.Close();
- exit:
- Close();
- return FALSE;
- }
- BOOL CDib::Save(const char * pzFileName)
- {
- // BITMAPFILEHEADER bmpFileHeader;
- CFile file;
- int nBmpFileHeaderSize;
- //open and read the DIB file header
- nBmpFileHeaderSize=sizeof(BITMAPFILEHEADER);
- if(!file.Open(pzFileName,CFile::modeCreate | CFile::modeWrite | CFile::typeBinary))
- goto exit;
- file.Write(&bmpFileHeader,nBmpFileHeaderSize);
- //allocate memory fail
- if(!m_pDib)
- goto failure;
- //read the dib into the buffer at a time using ReadHuge
- file.WriteHuge(m_pDib,bmpFileHeader.bfSize-nBmpFileHeaderSize);
- file.Close();
- return TRUE;
- failure:
- file.Close();
- exit:
- return FALSE;
- }
- BYTE * CDib::GetBits()
- {
- //the size of the color map is determined by the number
- //of RGBQUAD structures presend.
- //it also depends on the bit_depth of the Dib
- DWORD dwNumColors,dwColorTableSize;
- BITMAPINFOHEADER *lpDib=(BITMAPINFOHEADER *)m_pDib;
- WORD wBitCount=lpDib->biBitCount;
- if(lpDib->biSize>=36)
- dwNumColors=lpDib->biClrUsed;
- else
- dwNumColors=0;
- if(dwNumColors==0)
- {
- if(wBitCount!=24)
- dwNumColors=1L<<wBitCount;
- else
- dwNumColors=0;
- }
- dwColorTableSize=dwNumColors*sizeof(RGBQUAD);
- return m_pDib+lpDib->biSize+dwColorTableSize;
- }
- int CDib::GetBiBitCount()
- {
- if(m_pDib!=NULL)
- return ((BITMAPINFOHEADER *)m_pDib)->biBitCount;
- return 0;
- }