[Mesa-stable] [PATCH] glsl: Expose gl_MaxTess{Control, Evaluation}AtomicCounters.

[Matt Turner]

... with only ARB_shader_atomic_counters.

I expected to see interactions with ARB_tessellation_shader in the
ARB_shader_atomic_counters spec, but they do not exist. It seems that we
should unconditionally expose these variables in the presence of
ARB_shader_atomic_counters:

   gl_MaxTessControlAtomicCounters
   gl_MaxTessEvaluationAtomicCounters

This partially reverts commit da7adb99e8. The commit also affected
gl_MaxTessControlImageUniforms and gl_MaxTessEvaluationImageUniforms
similarly but the ARB_shader_image_load_store spec does list an
interaction with ARB_tessellation_shader.

Cc: "11.0" <mesa-stable at lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92095
---
Or should we consider the lack of interactions in ARB_shader_atomic_counters
to be a bug, such that we should modify the test failing in the bug?

 src/glsl/builtin_variables.cpp | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index b5e2908..0722051 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -680,14 +680,10 @@ builtin_variable_generator::generate_constants()
       if (!state->es_shader) {
          add_const("gl_MaxGeometryAtomicCounters",
                    state->Const.MaxGeometryAtomicCounters);
-
-	 if (state->is_version(400, 0) ||
-             state->ARB_tessellation_shader_enable) {
-		 add_const("gl_MaxTessControlAtomicCounters",
-                           state->Const.MaxTessControlAtomicCounters);
-		 add_const("gl_MaxTessEvaluationAtomicCounters",
-                           state->Const.MaxTessEvaluationAtomicCounters);
-	 }
+         add_const("gl_MaxTessControlAtomicCounters",
+                   state->Const.MaxTessControlAtomicCounters);
+         add_const("gl_MaxTessEvaluationAtomicCounters",
+                   state->Const.MaxTessEvaluationAtomicCounters);
       }
    }
 
-- 
2.4.6