[Mesa-dev] Should we fix Unigine apps?

[Kenneth Graunke]

On 01/25/2012 01:17 PM, Marek Olšák wrote:
> Hi everyone,
>
> If your Mesa driver supports GL3 or EXT_texture_array or ARB_draw_instanced, Unigine is broken for you. (I tested Unigine Sanctuary and Unigine Heaven, the others probably won't be any different)
>
> The only way to make it work seems to be to relax some requirements of the GL spec and extensions (i.e. being non-compliant and non-portable in theory, but actually being very portable in practice). There are probably more ways to go about it. The patch below fixes softpipe and r600g. I think we should discuss this and come up with some solution, otherwise Unigine will be broken forever. It doesn't have to be exactly like this patch. I think that if we go with an out-of-spec behavior, we should print a compiler warning at least.
>
>  From what I gathered, Unigine behaves like this:
> if (ARB_draw_instanced) use gl_InstanceID;
> if (EXT_texture_array || GL3) use sampler2DArrayShadow;
>
> There are no GLSL preprocessor directives in any shader in Unigine whatsoever.
>
> Comments welcome.
>
> Marek

I believe Eric has some patches to work around Unigine as well.  Eric?