[Bf-committers] what is the license of Blender GLSL shaders?

[Dalai Felinto]

"I never thought people would export glsl shader files together with models
to use in other engines... is that the use case?"
Yes. I had GameKit in mind while wondering on that. But as Campbell brought
it up other engines can benefit from that as well.

--
Dalai
(although I had GameKit in mind I'm not part of the dev team. I was just
trying to have this clear to suggest them to finally support blender glsl
materials)

2011/10/13 Ton Roosendaal <ton at blender.org>

> Hi Dalai,
>
> Yeah... I noticed missing header too.
> But I know enough of Blender's code to see it's a copy of existing
> functions here :)
>
> It even has the bump code we added in 2.59...
>
> I never thought people would export glsl shader files together with
> models to use in other engines... is that the use case? Is that even
> more or less normal nowadays?
>
> In that case we could track back who contributed to the glsl files and
> check if it can be BSD'ed or MIT'ed so...
>
> -Ton-
>
> ------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
> Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands
>
> On 13 Oct, 2011, at 19:48, Dalai Felinto wrote:
>
> > Hi Ton,
> >
> > the shader files (gpu_shader_material.glsl and
> > gpu_shader_vertex.glsl) have
> > no license header on them.
> > Thus my hope that they were not under the GPL.
> >
> > In fact most of the code snippets we have there are classic
> > implementations.
> > I don't think they can even be under specific license.
> > I find strange to have GPL reinforced over them.
> >
> >> First: there's no "BF" or "BFL" license... it's just "GNU GPL v2
> > or later". :)
> > I guess I was a bit outdated :p I was referring to this
> > http://www.blender.org/BL/
> >
> > Thanks,
> > Dalai
> >
> > 2011/10/13 Tom M <letterrip at gmail.com>
> >
> >> Ton,
> >>
> >> check with FSF, but I seriously doubt that a shader would be
> >> expressive, and hence is not copyrightable.
> >>
> >> A generated shader is even less likely to be viewed as expressive.
> >>
> >> LetterRip
> >>
> >> On Thu, Oct 13, 2011 at 1:36 AM, Ton Roosendaal <ton at blender.org>
> >> wrote:
> >>> Hi Dalai,
> >>>
> >>> First: there's no "BF" or "BFL" license... it's just "GNU GPL v2 or
> >>> later". :)
> >>>
> >>> If I understand the function well, it's generating a text file using
> >>> the GLSL shader code as in our svn (which is GPL). In that way the
> >>> exported glsl code remains GPL.
> >>>
> >>> -Ton-
> >>>
> >>>
> ------------------------------------------------------------------------
> >>> Ton Roosendaal  Blender Foundation   ton at blender.org
> www.blender.org
> >>> Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The
> >>> Netherlands
> >>>
> >>> On 13 Oct, 2011, at 8:17, Dalai Felinto wrote:
> >>>
> >>>> Hi,
> >>>> I understand that Blender code is under GPL/BF licensing.
> >>>>
> >>>> But if I use the command (added on rev. 40061):
> >>>> shader = gpu.export_shader(scene,material)
> >>>>
> >>>> Is the shader still GPL/BFL? The shader is made of snippets of
> >>>> Blender code,
> >>>> so I can see what lawyers may clam. And technically speaking a GLSL
> >>>> Shader
> >>>> is a program (compiles and run in the GPU).
> >>>>
> >>>> It would be really sad if this is the case though. Otherwise this
> >>>> could be
> >>>> used for external engines.
> >>>>
> >>>> Thanks,
> >>>> Dalai
> >>>> _______________________________________________
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> >>>
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