[Mesa-dev] [PATCH 1/6] Scaffolding for ARB_shader_bit_encoding.

[Kenneth Graunke]

On 04/30/2012 04:19 AM, Olivier Galibert wrote:
> That adds support for activating the extension.  It doesn't actually
> *do* anything yet, of course.
>
> Signed-off-by: Olivier Galibert<galibert at pobox.com>
> ---
>   src/glsl/builtins/tools/generate_builtins.py |    1 +
>   src/glsl/glcpp/glcpp-parse.y                 |    3 +++
>   src/glsl/glsl_parser_extras.cpp              |    1 +
>   src/glsl/glsl_parser_extras.h                |    2 ++
>   src/glsl/standalone_scaffolding.cpp          |    1 +
>   src/mesa/main/extensions.c                   |    1 +
>   src/mesa/main/mtypes.h                       |    1 +
>   src/mesa/main/version.c                      |    1 +
>   src/mesa/state_tracker/st_extensions.c       |    4 ++++
>   9 files changed, 15 insertions(+)
>
[snip]
> diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
> index 1b4bca6..0cfe962 100644
> --- a/src/mesa/state_tracker/st_extensions.c
> +++ b/src/mesa/state_tracker/st_extensions.c
> @@ -592,6 +592,10 @@ void st_init_extensions(struct st_context *st)
>         ctx->Extensions.S3_s3tc = GL_FALSE;
>      }
>
> +   if (ctx->Const.NativeIntegers) {
> +      ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
> +   }
> +
>      if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
>                                   PIPE_SHADER_CAP_MAX_INSTRUCTIONS)>  0) {
>   #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */

I believe this hunk cause Gallium drivers which support native integers 
to advertise ARB_shader_bit_encoding.  (Someone please correct me if I'm 
wrong...)  We usually move the "advertise the extension" patch to the 
end, once everything's done.

Otherwise, this patch looks good!
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>