OpenEuphoria

2. Re: [OT] Swap RGB

• Posted by Gary Shingles <eu at 531pi.co.?z> Oct 23, 2007
• 582 views
• Last edited Oct 24, 2007

Ricardo Forno wrote:

> Does anyone know a program that can exchange a RGB palette for, say, a BRG
> one?
> That is, everything that shows as red should be viewed a blue, and the other
> way around?
> What I mean is that this change should be permanent, for any image on screen.
> Is there a way to achieve this in EUPHORIA?
> Thanks.

Hi Ricardo

Maybe the win32dib library can help there?  It can load images and you can
easily access the dib image memory to make manipulations, then save the image.

A program which can do it is IrfanView (http://www.irfanview.de/).

Gary

4. Re: [OT] Swap RGB

• Posted by Pete Lomax <petelomax at ?lueyo?der.co.uk> Oct 24, 2007
• 599 views

Ricardo Forno wrote:
> 
> Gary Shingles wrote:
> > 
> > Ricardo Forno wrote:
> > 
> > > Does anyone know a program that can exchange a RGB palette for, say, a BRG
> > > one?
> > > That is, everything that shows as red should be viewed a blue, and the
> > > other
> > > way around?
> > > What I mean is that this change should be permanent, for any image on
> > > screen.
> > > Is there a way to achieve this in EUPHORIA?
> > > Thanks.
> > 
> > Hi Ricardo
> > 
> > Maybe the win32dib library can help there?  It can load images and you can
> > easily
> > access the dib image memory to make manipulations, then save the image.
> > 
> > A program which can do it is IrfanView (<a
> > href="http://www.irfanview.de/">http://www.irfanview.de/</a>).
> > 
> > Gary
> 
> Thanks, Gary, but this is not what I want. I'd like, for example, to see every
> page of the Web in different colors, while I sail. That's why I'd want to
> permanently
> change the palette (Ok, until I want a different one..).
> Regards.

Do you mean http://www.google.co.uk/search?q=SetSysColors ?

Regards,
Pete

6. Re: [OT] Swap RGB

• Posted by Pete Lomax <petelomax at ?lueyonder.co?uk> Oct 25, 2007
• 604 views

Ricardo Forno wrote:
> 
> 
> Hi Pete.
> I went to the description and, unless I don't understand exactly what it does,
> this is not the thing I want.
> According to what I understood, the SetSysColors routine is applied only to
> a single window.
No, it is system side, but see below.
> If you are browsing the Net, this windows gets changed rapidly, and
> consequently
> the routine's effect dissapears.
> Moreover, I'd like to execute a program *before* connecting to Internet, such
> that its effects last
> until the program is executed once more.
> Maybe I am in error, but I don't think SetSysColors can do that.
> Do you remember a joke program that in old times changed the screen upside
> down,
> or the phrases backward, until some action was taken? Well, what I want is
> something similar, but in relation to colors.
> But it seems no one knows about it, and probably it was never written.
> Thanks again, and best regards.

Don't get your hopes up too high, but I translated an m$ example to Eu. It does
a good job on Explorer, the trouble is that most programs such as Opera (and
Edita) do not display things using system colours very often, so the effect is
much more limited. Anyway, worth a spin just for a laugh:

include dll.e
include machine.e
include get.e
constant user32=open_dll("user32.dll"),
	 xGetSysColor=define_c_func(user32,"GetSysColor",{C_INT},C_INT),
xSetSysColor=define_c_func(user32,"SetSysColors",{C_INT,C_POINTER,C_POINTER},C_INT),
	 pDspElements=allocate(4*19),
	 pRGBValues=allocate(4*19)

sequence Csave
object void

    Csave=repeat(0,19)
    for i=0 to 18 do
	Csave[i+1]=c_func(xGetSysColor,{i})
    end for
    for i=0 to 18 do
	poke4(pDspElements+i*4,i)
	poke4(pRGBValues+i*4,rand(#FFFFFF))
    end for
    void = c_func(xSetSysColor,{19,pDspElements,pRGBValues})
    puts(1,"press any key to reset")
    if wait_key() then end if
    poke4(pRGBValues,Csave)
    void = c_func(xSetSysColor,{19,pDspElements,pRGBValues})

Regards,
Pete

8. Re: [OT] Swap RGB

• Posted by Ricardo Forno <ricardoforno at tutop??.com> Oct 25, 2007
• 600 views

Pete Lomax wrote:
> 
> Pete Lomax wrote:
> > No, it is system side, but see below.
> I meant to say system wide, but that'll do .

Thanks, Pete, it worked fine.
However, this was only part of what I wanted to do.
Colors whitin the window are not modified.
Do you think it is possible to do that, for any page,
so that what is usually seen as red shows as yellow, etc.?

By the way, I don't really know how to deal with DLLs.
Where can I find an explanation? I know how to program in C,
but only at the applicaton level.
Moreover, where can I get a description of the other routines in user32.dll?
One thing that recently I wondered how is it done is how some programs
intercept the Ctrl-C call to the clipboard, and then manage to store
the clipboard contents in a file. Can this be done with some system dll?
Many thanks for your help.

10. Re: [OT] Swap RGB

• Posted by Ricardo Forno <ricardoforno at ??topia.com> Oct 27, 2007
• 587 views

Hi, Pete. I'm not very profficient at colloquial Englis. That's why I don't
understand this:

http://palacebuilders.pwp.blueyonder.co.uk/pss.gif
http://palacebuilders.pwp.blueyonder.co.uk/mss.gif

BTW, which one of the above does my page look like to you?
http://palacebuilders.pwp.blueyonder.co.uk/euphoria.html

Also, who is JL?
JL says he can do, I wouldn't mind seeing this as well.

Regards.

12. Re: [OT] Swap RGB

• Posted by Ricardo Forno <ricardoforno at tutopi?.co?> Oct 27, 2007
• 596 views

Hi Pete.
You wrote:

I am assuming that it is mostly the web browser you want to change, right?

This may be an option.
But what I was thinking originally was that the video signals going to
the screen could be changed on their way, for example manipulating the
bits representing the color code. This could be done under old DOS by
intercepting some interrupts, but it seems that this is no more possible
under Windows.
Thanks again. I think this subject is now closed.