glsl: added uniform initializer check

GLSL 1.10 disallows initializers for uniforms but GLSL 1.20 and later
allows them.  This patch uses the #version directive to allow/disallow
uniform initializers.

This addresses bug 25807, but piglit also needs to be fixed to specify
the GLSL version in the shader.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index ee5a50ca82..b62cfc36af 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -3763,6 +3763,14 @@ _slang_gen_var_decl(slang_assemble_ctx *A, slang_variable *var,
 #endif
       }
 
+      if (var->type.qualifier == SLANG_QUAL_UNIFORM &&
+          !A->allow_uniform_initializers) {
+         slang_info_log_error(A->log,
+                              "initializer for uniform %s not allowed",
+                              varName);
+         return NULL;
+      }
+
       /* IR for the variable we're initializing */
       varRef = new_var(A, var);
       if (!varRef) {