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

[Ton Roosendaal]

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 I guess I was a bit outdated :p I was referring to this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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