Petzold shows using it like this:
BYTE *pBits;
hBitmap = CreateDIBSection( ... &pBits ...);
That will not compile with Pelles.I have to use a VOID type as it is prototyped in the msdn library:
VOID *pBits;
hBitmap = CreateDIBSection( ... &pBits ...);
I assume the msdn type delaration is correct.
If so, is this also correct, if I want to write 4 bytes using that pointer:
VOID *pBits;
DWORD *pixel;
hBitmap = CreateDIBSection( ... &pBits ...);
pixel = (DWORD*) pbits;
Yes, that looks OK.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Thanks
It was taking about 2 seconds to set 1000 x 750 (750,000) points in a bitmap using SetPixel;
With the DIBSection, writing in the color values directly, it's virtually instantaneous. No noticeable
delay.
Very easy to use also, with 24 or 32 bit colors.
