problem with two consecutive glshader elements with preset in pipeline

[Hamdi Rakkez]

Hi Luc,

I have tried adding *gldownload* and *glupload* between *glshader* but with
no luck with resolving this problem.

Best,
Hamdi

On Tue, Oct 27, 2015 at 11:33 AM, Luc Deschenaux <
luc.deschenaux.mta at sunrise.ch> wrote:

> 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>
> 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> 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
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>
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