[Mesa-dev] [PATCH] GLX: Add an env var to enable the support of GLX extensions needing both client and server support, in case of client support and direct rendering.

[Ilia Mirkin]

On Wed, Jun 18, 2014 at 11:32 PM, Axel Davy <axel.davy at ens.fr> wrote:
> In the case of XWayland, there's no accelerated indirect rendering.
> For example GLX_ARB_create_context is not advertised by the server,
> and according to the spec, we are not allowed to advertise it
> to the application because of that.
>
> This env var makes Mesa ignore this restriction, and
> a GLX extension is advertised whenever the client supports it.
>
> Signed-off-by: Axel Davy <axel.davy at ens.fr>
> ---
>  src/glx/glxextensions.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/src/glx/glxextensions.c b/src/glx/glxextensions.c
> index ce5d66d..34cb6d0 100644
> --- a/src/glx/glxextensions.c
> +++ b/src/glx/glxextensions.c
> @@ -566,10 +566,15 @@ __glXCalculateUsableExtensions(struct glx_screen * psc,
>                                 GLboolean display_is_direct_capable,
>                                 int minor_version)
>  {
> +   const char *ignore_server_restrictions = getenv("IGNORE_SERVER");

I think such variables tend to have some sort of prefix. GLX_ seems to
make sense here... or MESA_.

> +   unsigned char should_ignore_server_restrictions = 0;
>     unsigned char server_support[8];
>     unsigned char usable[8];
>     unsigned i;
>
> +   if (ignore_server_restrictions && !strcmp(ignore_server_restrictions,"1"))
> +      should_ignore_server_restrictions = 0xff;
> +
>     __glXExtensionsCtr();
>     __glXExtensionsCtrScreen(psc);
>
> @@ -617,7 +622,9 @@ __glXCalculateUsableExtensions(struct glx_screen * psc,
>              | (client_glx_support[i] & psc->direct_support[i] &
>                 server_support[i])
>              | (client_glx_support[i] & psc->direct_support[i] &
> -               direct_glx_only[i]);
> +               direct_glx_only[i])
> +            | (client_glx_support[i] & psc->direct_support[i] &
> +               should_ignore_server_restrictions);
>        }
>     }
>     else {
> --
> 1.9.1
>
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