nanogui: Thread: Pallete and bitmap problem

Hello all,

I am playing with microwindows and I set up a wirtual system. Currently,
I have problem with paletes and bitmaps.
I can display image with 24 bit colors with no problem. see: http://www.pavelpaces.net/mwin/BkgFULL.bmp.
This file is dispalyed right.
Then when I convert the image into smaller 8 bit pallete file (see http://www.pavelpaces.net/mwin/Bkg.bmp
).
Then I get result depicted in the http://www.pavelpaces.net/mwin/BkgBad.bmp,
where colors are somehow disturbed.

Any idea, how to solve that? please?

Thanx Pavel.

: Then when I convert the image into smaller 8 bit pallete file (see 
http://www.pavelpaces.net/mwin/Bkg.bmp
: ).
: Then I get result depicted in the 
http://www.pavelpaces.net/mwin/BkgBad.bmp,
: where colors are somehow disturbed.

When you use an 8bpp bitmap, the colors are converted to a maximum
of 256 different colors, and they are put into a palette that is
carried with the .bmp file.  Depending on your display bpp, which
you didn't specify, these may be re-converted to another palette
or to your screen bpp.  Thus, there may be considerable degradation.

Some of these conversions have been disabled/enabled for various
reasons.  The code that handles this is in engine/devdraw.c, I think
DrawImage, or something like that.  The image decoder is in
engine/image_bmp.c.

Regards,

Greg