Subj : Re: How to read a pixel from a DIB?
To   : borland.public.cpp.borlandcpp
From : Sebastian Ledesma
Date : Wed Oct 20 2004 05:23 pm

Bruce:

Thanks again for the info. I dont want to create a TMemoryDC,  also I'm
using TDibs and no TBitmaps, if I use
TDC / TMemoryDC i should convert my TDib into a TBitmap.
I'm trying with dealing directly with the TDib by using TDib::XOffset and
TDib::YOffset (or more convenient) TDib::PixelPtr(x,y) but the
interpretation of the data is a bit confusing. Also, I tried
TDib::FlippedY(yCoordinate)
but something still is missing.

Regards
Sebastian

" Bruce Salzman" <bruce@nospam.org> escribió en el mensaje
news:4176868b$1@newsgroups.borland.com...
> >
> > That's the way I will use, only lazzines before coding. I have to
> > convert
> > X,Y coordinates into a linear coordinate (hey that's so hard!!!
> > :-) ), also
> > what about for non 24 bits bitmaps. In 16 bits bitmaps I will have
> > RGB in 5
> > bits, in 8 bits I will have a palette index, and in 4 bits (old 16
> > colored
> > bitmaps) something similar.
> >
>
> That's why using GetPixel() is the easiest way. It will return the
> pixel color no matter what format the DIB is in.
>
> Regards,
> Bruce
>
>

.