Re:Speedy brightness & contrast
Hi Hammady,
I don't know any windows API function to change B/C of an object. If you
want "more of the same"... I'm developing an applicattion that do as
follows:
1) I take the source bitmap and copy it to the buffer.
2) If it's a palettized bitmap, I shift the palette. If not, have to
shift every pixel. I work on the buffer every time.
3) If the user agree, I copy the buffer on the source bitmap. If the
source bitmap is, i.e., into a TImage object, you can save it later.
4) I don't know any windows API function to
Hammady escribi en mensaje <3795A316.A37A8...@idsc1.gov.eg>...
Quote
>hi all,
> i've been searching a lot for an answer for this question, and all what i
>get is 'slow' or 'Limited' answers..
>SLOW one is the using of scanline property
>Limited one is using shifting palate method which is only limited for gary
>scale 8 bit BMP.
>i think there is something missing there, which is i need to change the way
>the bmp looks an not the bmp itself!! like photoshop uses in the preview of
>Brightness / contrast change with a large bmp. It previews the changes at
no
>time, then, it takes its time when you agree.
> my question is: Is there a windows API that controls the B/C of an
>object?, or, how to do something like a preview without actually go in
depth
>inside your bmp?
>Any help, tips are appreciated...
>Hammady
