win7 64位
创建 一个 MFC 对话框程序：
添加一个按钮：
按钮的 点击事件处理函数内容如下：
代码主要演示 函数的用法
void CBMP_SHOW_PLADlg::OnBnClickedBtnShowBmpPla()
{
// TODO: 在此添加控件通知处理程序代码
OPENFILENAME ofn ;
static TCHAR szFileName [MAX_PATH], szTitleName [MAX_PATH] ;
static TCHAR szFilter[] = TEXT ("Bitmap Files (*.BMP)\0*.bmp\0")
TEXT ("All Files (*.*)\0*.*\0\0") ;
TCHAR tszTempPath[_MAX_PATH];
HWND hWnd;
HDC hdcWindow ;
hWnd = AfxGetMainWnd()->m_hWnd;
hdcWindow =::GetDC(hWnd);
ZeroMemory(tszTempPath, MAX_PATH);
GetCurrentDirectory(MAX_PATH, tszTempPath);
ofn.lStructSize = sizeof (OPENFILENAME) ;
ofn.hwndOwner = NULL ;
ofn.hInstance = NULL ;
ofn.lpstrFilter = szFilter ;
ofn.lpstrCustomFilter = NULL ;
ofn.nMaxCustFilter = 0 ;
ofn.nFilterIndex = 0 ;
ofn.lpstrFile = szFileName ;
ofn.nMaxFile = MAX_PATH ;
ofn.lpstrFileTitle = szTitleName ;
ofn.nMaxFileTitle = MAX_PATH ;
ofn.lpstrInitialDir = tszTempPath ;
ofn.lpstrTitle = NULL ;
ofn.Flags = 0 ;
ofn.nFileOffset = 0 ;
ofn.nFileExtension = 0 ;
ofn.lpstrDefExt = TEXT ("bmp") ;
ofn.lCustData = 0 ;
ofn.lpfnHook = NULL ;
ofn.lpTemplateName = NULL ;
BOOL bRet = GetOpenFileName (&ofn);
if(!bRet){
return ;
}
printf("szFileName = %S\r\n",szFileName);
_tprintf(_T("%s\r\n"),szFileName);
TCHAR * szCompression [] = { TEXT ("BI_RGB"), TEXT ("BI_RLE8"),
TEXT ("BI_RLE4"),
TEXT ("BI_BITFIELDS"),
TEXT ("unknown") } ;
BITMAPCOREHEADER * pbmch ;
BITMAPFILEHEADER * pbmfh ;
BOOL bSuccess ;
DWORD dwFileSize, dwHighSize, dwBytesRead ;
HANDLE hFile ;
int i ;
PBYTE pFile ;
TCHAR * szV ;
BITMAPINFOHEADER * pbmih ;
BITMAPV4HEADER *pbmihv4 ;
BITMAPV5HEADER *pbmihv5 ;
hFile = CreateFile (szFileName, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL) ;
if (hFile == INVALID_HANDLE_VALUE)
{
printf("Cannot open file.\r\n\r\n") ;
return ;
}
// Get the size of the file
dwFileSize = GetFileSize (hFile, &dwHighSize) ;
if (dwHighSize)
{
printf("Cannot deal with >4G files.\r\n\r\n") ;
CloseHandle (hFile) ;
return ;
}
// Allocate memory for the file
pFile = (PBYTE )malloc (dwFileSize) ;
if (!pFile)
{
printf("Cannot allocate memory.\r\n\r\n") ;
CloseHandle (hFile) ;
return ;
}
bSuccess = ReadFile (hFile, pFile, dwFileSize, &dwBytesRead, NULL) ;
if (!bSuccess || (dwBytesRead != dwFileSize))
{
printf("Could not read file.\r\n\r\n") ;
CloseHandle (hFile) ;
free (pFile) ;
return ;
}
CloseHandle (hFile) ;
printf("File size = %u bytes\r\n\r\n", dwFileSize) ;
// Display BITMAPFILEHEADER structure
pbmfh = (BITMAPFILEHEADER *) pFile ;
printf("BITMAPFILEHEADER\r\n") ;
printf("\t.bfType = 0x%X\r\n", pbmfh->bfType) ;
printf("\t.bfSize = %u\r\n", pbmfh->bfSize) ;
printf("\t.bfReserved1 = %u\r\n", pbmfh->bfReserved1) ;
printf("\t.bfReserved2 = %u\r\n", pbmfh->bfReserved2) ;
printf("\t.bfOffBits = %u\r\n\r\n", pbmfh->bfOffBits) ;
// Determine which information structure we have
DWORD InfoHeadSize = *((DWORD *)(pFile +sizeof (BITMAPFILEHEADER)));
printf("InfoHeadSize = %d\n",InfoHeadSize);
pbmih = (BITMAPINFOHEADER *) (pFile + sizeof (BITMAPFILEHEADER)) ;
szV = TEXT ("i");
printf("\t.b%sSize = %u\r\n", szV, pbmih->biSize) ;
printf("\t.b%sWidth = %i\r\n", szV, pbmih->biWidth);
printf("\t.b%sHeight = %i\r\n", szV, pbmih->biHeight) ;
printf("\t.b%sPlanes = %u\r\n", szV, pbmih->biPlanes) ;
printf("\t.b%sBitCount = %u\r\n", szV, pbmih->biBitCount) ;
printf("\t.b%sCompression = %S\r\n", szV,
szCompression [min (4, pbmih->biCompression)]) ;
printf("\t.b%sSizeImage = %u\r\n", szV, pbmih->biSizeImage);
printf("\t.b%sXPelsPerMeter = %i\r\n", szV,
pbmih->biXPelsPerMeter) ;
printf("\t.b%sYPelsPerMeter = %i\r\n", szV,
pbmih->biYPelsPerMeter) ;
printf("\t.b%sClrUsed = %i\r\n", szV, pbmih->biClrUsed) ;
printf("\t.b%sClrImportant = %i\r\n\r\n", szV,
pbmih->biClrImportant) ;
DWORD biClrUsed = 0;
DWORD iNumColors =0;
HPALETTE hPalette = NULL;
if (InfoHeadSize == sizeof (BITMAPINFOHEADER)){
biClrUsed = pbmih->biClrUsed ;
if(biClrUsed == 0){
if(pbmih->biBitCount <16){
iNumColors = 1<<pbmih->biBitCount ;
}
}else{
iNumColors = biClrUsed ;
}
if(iNumColors >0){
int i ;
LOGPALETTE * plp ;
RGBQUAD * prgb ;
plp = (LOGPALETTE *)malloc (sizeof (LOGPALETTE) *
(iNumColors - 1) * sizeof (PALETTEENTRY)) ;
plp->palVersion = 0x0300 ;
plp->palNumEntries = iNumColors ;
for (i = 0 ; i < iNumColors ; i++)
{
prgb = (RGBQUAD *) (((BYTE *) pbmih) +
pbmih->biSize) + i;
plp->palPalEntry[i].peRed = prgb->rgbRed ;
plp->palPalEntry[i].peGreen = prgb->rgbGreen ;
plp->palPalEntry[i].peBlue = prgb->rgbBlue ;
plp->palPalEntry[i].peFlags = 0 ;
}
hPalette = CreatePalette (plp) ;
free (plp) ;
}
if(hPalette){
SelectPalette (hdcWindow, hPalette, FALSE) ;
RealizePalette (hdcWindow) ;
}
SetDIBitsToDevice (hdcWindow,
0,
0,
pbmih->biWidth,
pbmih->biHeight,
0,
0,
0,
pbmih->biHeight,
((BYTE *)pbmih)+pbmih->biSize + sizeof (RGBQUAD)*iNumColors,
(BITMAPINFO *)pbmih,
DIB_RGB_COLORS) ;
}else{
printf("This BMP File is not BITMAPINFOHEADER \r\n");
}
}
在 OnInitDialog 中添加如下代码：
AllocConsole();
SetConsoleTitle(_T("debug console"));
freopen("CONOUT$","w",stdout);
printf("Hello\r\n");有一个地方需要注意:
HWND hWnd;
HDC hdcWindow ;
hWnd = AfxGetMainWnd()->m_hWnd;
hdcWindow =::GetDC(hWnd);GetDC 前面需要添加 ::符号
显示效果：
