// ---
static LPBITMAPINFOHEADER GetBitmapInfo( HANDLE hDIB ) {
LPBITMAPINFOHEADER pdibInfo = NULL;
pdibInfo = (LPBITMAPINFOHEADER)hDIB;
FixBitmapInfo( pdibInfo );
return pdibInfo;
}
/* ReadDibBitmapInfo()
*
* Will read a file in DIB format and return a global HANDLE to its
* BITMAPINFO. This function will work with both "old" and "new"
* bitmap formats, but will always return a "new" BITMAPINFO.
*/
bool CxImageBMP::DibReadBitmapInfo(CxFile* fh, BITMAPINFOHEADER *pdib)
{
if ((fh==NULL)||(pdib==NULL)) return false;
if (fh->Read(pdib,sizeof(BITMAPINFOHEADER),1)==0) return false;
BITMAPCOREHEADER bc;
switch (pdib->biSize) // what type of bitmap info is this?
{
case sizeof(BITMAPINFOHEADER):
break;
case 64: //sizeof(OS2_BMP_HEADER):
fh->Seek((long)(64 - sizeof(BITMAPINFOHEADER)),SEEK_CUR);
break;
case sizeof(BITMAPCOREHEADER):
bc = *(BITMAPCOREHEADER*)pdib;
pdib->biSize = bc.bcSize;
pdib->biWidth = (DWORD)bc.bcWidth;
pdib->biHeight = (DWORD)bc.bcHeight;
pdib->biPlanes = bc.bcPlanes;
pdib->biBitCount = bc.bcBitCount;
pdib->biCompression = BI_RGB;
pdib->biSizeImage = 0;
pdib->biXPelsPerMeter = 0;
pdib->biYPelsPerMeter = 0;
pdib->biClrUsed = 0;
pdib->biClrImportant = 0;
fh->Seek((long)(sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER)), SEEK_CUR);
break;
default:
//give a last chance
if (pdib->biSize>(sizeof(BITMAPINFOHEADER))&&
(pdib->biSizeImage==(unsigned long)(pdib->biHeight*((((pdib->biBitCount*pdib->biWidth)+31)/32)*4)))&&
(pdib->biPlanes==1)&&(pdib->biCompression==BI_RGB)&&(pdib->biClrUsed==0))
{
fh->Seek((long)(pdib->biSize - sizeof(BITMAPINFOHEADER)),SEEK_CUR);
break;
}
return false;
}
FixBitmapInfo(pdib);
return true;
}
/* ReadDibBitmapInfo()
*
* Will read a file in DIB format and return a global HANDLE to its
* BITMAPINFO. This function will work with both "old" and "new"
* bitmap formats, but will always return a "new" BITMAPINFO.
*/
bool CxImageBMP::DibReadBitmapInfo(CxFile* fh, BITMAPINFOHEADER *pdib)
{
if ((fh==NULL)||(pdib==NULL)) return false;
if (fh->Read(pdib,sizeof(BITMAPINFOHEADER),1)==0) return false;
BITMAPCOREHEADER bc;
switch (pdib->biSize) // what type of bitmap info is this?
{
case sizeof(BITMAPINFOHEADER):
break;
case sizeof(BITMAPCOREHEADER):
bc = *(BITMAPCOREHEADER*)pdib;
pdib->biSize = bc.bcSize;
pdib->biWidth = (DWORD)bc.bcWidth;
pdib->biHeight = (DWORD)bc.bcHeight;
pdib->biPlanes = bc.bcPlanes;
pdib->biBitCount = bc.bcBitCount;
pdib->biCompression = BI_RGB;
pdib->biSizeImage = 0;
pdib->biXPelsPerMeter = 0;
pdib->biYPelsPerMeter = 0;
pdib->biClrUsed = 0;
pdib->biClrImportant = 0;
fh->Seek((long)sizeof(BITMAPCOREHEADER)-(long)sizeof(BITMAPINFOHEADER),SEEK_CUR);
break;
default:
return false;
}
FixBitmapInfo(pdib);
return true;
}
