problem with two consecutive glshader elements with preset in pipeline

[Luc Deschenaux]

Hi !

I am following the mailing list - and more experienced with OpenGL than
when I wrote this plugin - but actually too busy the next months to look
into this or to add vertex shader support as requested... Sorry !

If you dont need realtime, maybe as a very ugly (and slow) workaround
you can try to gldownload ! glupload between shaders :-(

Cheers,

Luc


On 27. 10. 15 15:59, Hamdi Rakkez wrote:
> Hi,
>
> Yes it is a bug actually, but I get the same behavior with the *vars*
> property.
>
> Is there a chance for this element to be fixed before any other release ?
>
> Best,
> Hamdi
>
> On Tue, Oct 27, 2015 at 5:35 AM, Matthew Waters <ystreet00 at gmail.com
> <mailto:ystreet00 at gmail.com>> wrote:
>
>     There probably was a bug in the preset handling code that relied
>     on static variables somewhere.  The glshader element has since
>     been redesigned in master and is very unlikely to receive any
>     updates in 1.6.
>
>     Cheers
>     -Matt
>
>
>     On 26/10/15 21:39, Hamdi Rakkez wrote:
>>     Revive thread
>>
>>     On Wed, Oct 21, 2015 at 5:25 PM, Hamdi Rakkez
>>     <hamdi.rakez.selotec at gmail.com
>>     <mailto:hamdi.rakez.selotec at gmail.com>> wrote:
>>
>>         Hi list,
>>
>>         I'm using gstreamer-1.5.90 on ubuntu 14.04LTS.
>>
>>         Here is the problem :
>>
>>         When using two consecutive *glshader* element in a pipeline
>>         and one of them have a *preset* property(uniform variable
>>         file path), that preset is not taken into consideration (as
>>         if it does not exist, and all the uniform variable into the
>>         fragment shader take the value 0.0)
>>
>>         pipeLine :
>>         gst-launch-1.0 videotestsrc ! glupload ! glshader
>>         location=fragment1.frag ! glshader location=fragment2.frag
>>         preset=fragment2_uniform_variables.preset ! gldownload !
>>         glimagesink
>>
>>         when removing the first *glshader* element from the
>>         pipeline, *preset* property works fine.
>>
>>         Does anyone knows if this is a bug or I'm missing something
>>         here ?
>>
>>         PS: Some behavior if I replace *preset* with *vars* and
>>         declare uniform variables withing the pipeline.
>>
>>         Thanks in advance.
>>
>>         Best regards,
>>         Hamdi
>>
>>
>
>
>
>
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-- 
SOFTWARE & COMPUTER SERVICES
Luc Deschenaux
Analyste-programmeur | Ingénieur système

t: 0788 266 366
v: 0225 085 085 @ netvoip.ch

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