[Interest] Quick2 "ShaderEffect: source or provider missing when binding textures"

Ola Røer Thorsen ola at silentwings.no
Fri Nov 8 10:48:54 CET 2013

Hi Gunnar,

thanks for the reply!

Well why am I drawing without data.. There's lots of things to learn to get
the most out of Quick2. :-)

Your suggestion there solved it for me, i'm testing on "Image.Ready" now
and it also fixed my next issue of to prevent showing black textures before
the image was loaded. The message is gone from the log too :-)

Best regards,

2013/11/7 Sletta Gunnar <Gunnar.Sletta at digia.com>

>  The error message has been quite helpful with tracking down errors in
> the past, but I guess we can at least remove it from release builds and
> limit it a bit :) Added
> https://bugreports.qt-project.org/browse/QTBUG-34676 to track this.
>  But why are you showing ShaderEffects which lack their image data? That
> is just wasting GPU resources
>  ShaderEffect {
>     property variant source;
>     visible: typeof source != 'undefined' && source.status == Ready
>     ...
> }
>  Should keep it hidden and also remove the warning...
>  cheers,
> Gunnar
>  ------------------------------
> *Fra:* interest-bounces+gunnar.sletta=digia.com at qt-project.org[interest-bounces+gunnar.sletta=
> digia.com at qt-project.org] på vegne av Ola Røer Thorsen [ola at silentwings.no
> ]
> *Sendt:* 7. november 2013 16:43
> *To:* interest at qt-project.org
> *Emne:* [Interest] Quick2 "ShaderEffect: source or provider missing when
> binding textures"
>   Hi all,
>  if I use a ShaderEffect on an image that is loaded asynchronously, I get
> the error/debug message on the console:
>  ShaderEffect: source or provider missing when binding textures
>  for every frame rendered until the image is completely loaded and the
> texture is complete.
>  This means our system logs on the target system (embedded linux device)
> gets flooded whenever we load new images (a photo viewer). Would it be
> possible to at least limit the number of times this is written (once
> instead of every frame)? Or could the message be removed completely? It's
> not useful at all when ShaderEffect is used this way.
>  Best regards,
> Ola
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