[lazarus] Wrong colours in win32

[Vincent Snijders]

On Sat, 13 Dec 2003 17:34:51 +0100
Micha Nelissen <micha at neli.hopto.org> wrote:

> Mattias Gaertner wrote:
> 
> > On Sat, 29 Nov 2003 18:17:56 +0100  Micha Nelissen
> > <M.Nelissen at student.tue.nl> wrote:
> > 
> > 
> >>Micha Nelissen wrote:
> >>
> >>
> >>>Very recently colours are wrong on win32. It happens only when
> >using >>-dUseFPImage. I think it has to do with recent "fpImage
> >streaming fixed">>
> >>>which I saw in the logs? AFAICS, no colour related things have
> >changed >>in the win32 interface.
> >>
> >>Okay, the colours still aren't correct :-(. They are correct if I
> >set my >desktop depth to 32 bit. At 16 bit it doesn't work. Don't
> >know about 24 >bit, my video card doesn't support that. Mattias,
> >could you look into 24 >to 16 bit conversion of images? I guess that
> >has to do with it.
> > 
> > 
> > The 24 of the image is irrelevant. 
> > If the 16 bit writing does not work, then 
> > - either the win32 intf has set the wrong shift and prec values 
> > - or WriteRawImageBits in intfgraphics.pas for BitsPerPixel=16 has
> > to change lo and hi byte.
> > 
> > The 5 lines in WriteRawImageBits simply replace some bits of a word.
> > 
> > If you think, that the win32 intf has set the right values then you
> > can try to replace
> >   TwoBytes:=PWord(P)^;
> > with
> >   TwoBytes:=(PByte(P)^ shl 8)+PByte(P)^;
> > 
> > 
> > The only way to make sure: I suggest you create a bitmap in 16 bit
> > mode, paint it red, then green, then blue and read the first word,
> > to see how windows manages colors.
> 
> Is there a way to get the lazarus logo as file, lazarus.xpm or so?
> Then I can make a seperate test app, debugging the ide is quite a lot
> of code ;-).
> 
> Micha.
See lazarus/images/splash_logo.xpm and
lazarus/images/lazarus_about_logo.xpm.

HTH,
Vincent.