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

[skoti]

Your code is not linked with the shaders, so you do not have to share 
your code.
You just pass the code to drivers, and there is compiled and sent to the 
graphics card. Code of your program is not connected with the shader, 
and only run it through the driver (which is allowed to run as separate 
programsfrom non-free (shaders is separate programs) 
http://www.gnu.org/licenses/gpl-faq.html#NFUseGPLPlugins).

Just do not hide the code shaders and shader code, do not changecode 
after reading from a file.


On Thu, Oct 13, 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 I guess I was a bit outdated :p I was referring to this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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