[Lazarus] GLScene flickers in GTK2 and TJpegImage error

[Paulo Malheiros]

Hello Burkhard

Thanks for the fix, the 'EConvertError' is in fact corrected.

I'll take a look at the Gtk2 flicker as you suggested. This issue  
becomes important because Lazarus is now officially in Gtk2. I  
remember some people talking about some issues in double-buffering  
Gtk2 a while back, so probably this problem might not have come from  
any of your changes.

Best regards,
Paulo


Quoting Burkhard Carstens <fpc at bcsoft.de>:

> Am Donnerstag, 16. Oktober 2008 14:01 schrieb Paulo Malheiros:
>> Hello,
>>
>> I installed the new release of Lazarus, great work by the way, but
>> the GLScene components are not totally compatible, using SVN from
>> http://svn.freepascal.org/svn/fpcprojects/glscene/trunk/ .
>>
>> On the Actor demo compiling gives an 'EConvertError' with the message
>> "Cannot assign a TJpegImage to a TGLBitmap32". I've seen in previous
>> discussions that Image formats have changed in Lazarus, any ideas on
>> how to make the change in GLScene?
>
> This should be fixed with glscene svn rev. 2262
>
>
>> The other problem is using in GTK2, GLscene flickers horribly which
>> didn't happened in 0.9.24 (can be checked with Volcano demo). What
>> has changed in GTK2 for this to happen?
>
> Did this work ok with a recent glscene svn version (> r2228) and laz
> 0.9.24 ? I changed some things regarding rendering context creation
> device context handling in glscene in around r.2228 .. that could have
> caused it, too. I don't use gtk2 so I wouldn't have noticed ..
>
>>
>> I can try and fix this, just need some directions :-)
>
> * try with svn r. 2227 (or any earlier version that worked for you) and
> current laz.
> * check Source/platform/gllclviewer.pas and Source/platform/
> gllingtkcontext.pas if you find things to improve ...
> * get in touch on freenode.net IRC #glscene channel
>
> regards
>  Burkhard
>
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