A question about createWindowsDIB and BITMAPINFO

[Wenhui Wang]

my code :
unsingned bufsize =0;
void * buffer;
bufsize=image->createWindowsDIB(buffer,bufsize,1,8,1)
BITMAPINFO* pDIBInfo = (BITMAPINFO*)buffer;

but the content of pDIBInfo->bmiHeader->biSize ect. are zeros,so i can't display a dicom image.

[jayition]

unsingned bufsize =0;
void * buffer;
bufsize=image->createWindowsDIB(buffer,bufsize,1,8,1)

To use the CreateWindowsDIB function , the buffer must to malloc memory first , like this :
const int gap = (4 - image->getWidth() & 0x3) & 0x3 ;
const unsigned long bufsize = OFstatic_cast(unsigned long, image->getWidth() + gap) * OFstatic_cast(unsigned long, image->getHeight());
void * buffer=malloc(bufsize );

bufsize=image->createWindowsDIB(buffer,bufsize,1,8,1)

It will work!

[Markus Sabin]

The name of the method might be confusing. createWindowsDIB does not create a BITMAPINFO header structure. It just renders the DICOM image to a buffer that can be referenced from a BITMAPINFO. In other words: Just the raw buffer is created. You have to build the BITMAPINFO structure yourself.

[Wenhui Wang]

thank you answer very much.would you like take an example of display ing a dicom image.