slang: Predefine ES symbols for FEATURE_es2_glsl.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c
index 00db299a271..478acb89d33 100644
--- a/src/mesa/shader/slang/slang_compile.c
+++ b/src/mesa/shader/slang/slang_compile.c
@@ -2610,6 +2610,15 @@ compile_with_grammar(const char *source,
       return GL_FALSE;
    }
 
+#if FEATURE_es2_glsl
+   if (sl_pp_context_add_predefined(context, "GL_ES", "1") ||
+       sl_pp_context_add_predefined(context, "GL_FRAGMENT_PRECISION_HIGH", "1")) {
+      slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
+      sl_pp_context_destroy(context);
+      return GL_FALSE;
+   }
+#endif
+
    memset(&options, 0, sizeof(options));
    if (sl_pp_tokenise(context, source, &options, &intokens)) {
       slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));