glsl: Create and use a has_uniform_buffer_objects() helper.

This is better than overriding the extension enable based on the
language version; it's robust against shaders that do:

   #version 140
   #extension GL_ARB_uniform_buffer_object : disable

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 27ebbcf..cef4436 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -126,6 +126,11 @@ struct _mesa_glsl_parse_state {
       return ARB_explicit_attrib_location_enable || is_version(330, 300);
    }
 
+   bool has_uniform_buffer_objects() const
+   {
+      return ARB_uniform_buffer_object_enable || is_version(140, 300);
+   }
+
    void process_version_directive(YYLTYPE *locp, int version,
                                   const char *ident);