glsl: Make invariant outputs in ES fragment shader not to cause error

In all GLSL ES versions output variables in fragment shader are allowed
to be invariant.

 From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 1.00 spec:
 "Only the following variables may be declared as invariant:
   ...
   - Built-in special variables output from the fragment shader."

 From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 3.00 spec:
 "Only variables output from a shader can be candidates for invariance."

Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107842

diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp
index 611cfabbd0343d90c1c6d63805ed47463896c27b..67a5a8c0509266bd9fb2579dd61c560455fa0139 100644 (file)
--- a/src/compiler/glsl/ast_to_hir.cpp
+++ b/src/compiler/glsl/ast_to_hir.cpp
@@ -2721,7 +2721,7 @@ is_allowed_invariant(ir_variable *var, struct _mesa_glsl_parse_state *state)
     * "Only variables output from a vertex shader can be candidates
     * for invariance".
     */
-   if (!state->is_version(130, 0))
+   if (!state->is_version(130, 100))
       return false;
 
    /*