[fpc-pascal] Re: fpGUI powered by OpenGL

[Paul Nicholls]

----- Original Message ----- 
From: "Darius Blaszyk" <dhkblaszyk at zeelandnet.nl>
To: "FPC-Pascal users discussions" <fpc-pascal at lists.freepascal.org>
Sent: Thursday, December 23, 2010 10:15 AM
Subject: Re: [fpc-pascal] Re: fpGUI powered by OpenGL


> On Thu, 2010-12-23 at 10:06 +1100, Paul Nicholls wrote:
>> "Darius Blaszyk" <dhkblaszyk at zeelandnet.nl> wrote
>> in message news:1292870518.1851.35.camel at darius-desktop...
>> > On Mon, 2010-12-20 at 18:58 +0100, Darius Blaszyk wrote:
>> >> > The above explains why it is useful for an application developer to
>> >> > use an openGL backend.
>> >> >
>> >> > It does not explain the following: Since fpGUI already has two
>> >> > backends (afaik, X and winap), why can't openGL a third one? Did you
>> >> > change the way fpGUI interfaces with its backend? Is this change so
>> >> > incompatible with the current backends, that they cannot be 
>> >> > modified?
>> >>
>> >> The changes I think are pretty incompatible. This is because the GLut
>> >> library also provides messaging, whereas in fpGUI the messages are
>> >> implemented outside of the backend. Therefore hacks are needed to keep
>> >> the drawing messages coming correctly. With a pascal context library
>> >> everything could be merged seamless I suppose.
>> >
>> > I've been badly mistaking. With some minor adjustments it will be
>> > possible to create an OpenGL back-end most probably. At least to a
>> > higher degree that I was proclaiming previously. I've now been able to
>> > hook most fpGUI messages to GLut.
>> >
>> > Regards, Darius
>> >
>>
>> Hi Darius, nicely done :)
>>
>> I for one, would be interested in the code :)
>
> Hi Paul,
>
> I've cleaned up the code and integrated it more nicely with the existing
> implementation. It runs now on Linux and Win32. However still struggling
> with the message loop which is implemented differently in GLut.
> As for the code, perfectly happy to share although I don't know where to
> put it. I will ask Graeme if he can create a branch or something. Will
> let you know.
>
> Regards, Darius
>

Thanks Darius, keep up the excellent work :)

cheers,
Paul