glsl2: Parser support for GL_ARB_fragment_coord_conventions

1 files changed, 59 insertions, 2 deletions

diff --git a/src/glsl/glsl_parser.ypp b/src/glsl/glsl_parser.ypp
index 6782255d45c..53132d9067d 100644
--- a/src/glsl/glsl_parser.ypp
+++ b/src/glsl/glsl_parser.ypp
@@ -97,6 +97,7 @@
 %token LOWP MEDIUMP HIGHP PRECISION
 
 %token VERSION EXTENSION LINE PRAGMA COLON EOL INTERFACE OUTPUT
+%token LAYOUT_TOK
 
    /* Reserved words that are not actually used in the grammar.
     */
@@ -117,6 +118,8 @@
 %type <type_qualifier> type_qualifier
 %type <type_qualifier> storage_qualifier
 %type <type_qualifier> interpolation_qualifier
+%type <type_qualifier> opt_layout_qualifier layout_qualifier
+%type <type_qualifier> layout_qualifier_id_list layout_qualifier_id
 %type <type_specifier> type_specifier
 %type <type_specifier> type_specifier_no_prec
 %type <type_specifier> type_specifier_nonarray
@@ -929,6 +932,60 @@ fully_specified_type:
 	}
 	;
 
+opt_layout_qualifier:
+	{ $$.i = 0; }
+	|  layout_qualifier
+	;
+
+layout_qualifier:
+	LAYOUT_TOK '(' layout_qualifier_id_list ')'
+	{
+	  $$ = $3;
+	}
+	;
+
+layout_qualifier_id_list:
+	layout_qualifier_id
+	| layout_qualifier_id_list ',' layout_qualifier_id
+	{
+	   $$.i = $1.i | $3.i;
+	}
+	;
+
+layout_qualifier_id:
+	IDENTIFIER
+	{
+	   $$.i = 0;
+
+	   if (state->ARB_fragment_coord_conventions_enable) {
+	      bool got_one = false;
+
+	      if (strcmp($1, "origin_upper_left") == 0) {
+		 got_one = true;
+		 $$.q.origin_upper_left = 1;
+	      } else if (strcmp($1, "pixel_center_integer") == 0) {
+		 got_one = true;
+		 $$.q.pixel_center_integer = 1;
+	      }
+
+	      if (state->ARB_fragment_coord_conventions_warn && got_one) {
+		 _mesa_glsl_warning(& @1, state,
+				    "GL_ARB_fragment_coord_conventions layout "
+				    "identifier `%s' used\n", $1);
+	      }
+	   }
+
+	   /* If the identifier didn't match any known layout identifiers,
+	    * emit an error.
+	    */
+	   if ($$.i == 0) {
+	      _mesa_glsl_error(& @1, state, "unrecognized layout identifier "
+			       "`%s'\n", $1);
+	      YYERROR;
+	   }
+	}
+	;
+
 interpolation_qualifier:
 	SMOOTH		{ $$.i = 0; $$.q.smooth = 1; }
 	| FLAT		{ $$.i = 0; $$.q.flat = 1; }
@@ -955,9 +1012,9 @@ type_qualifier:
 storage_qualifier:
 	CONST_TOK		{ $$.i = 0; $$.q.constant = 1; }
 	| ATTRIBUTE 		{ $$.i = 0; $$.q.attribute = 1; }
-	| VARYING		{ $$.i = 0; $$.q.varying = 1; }
+	| opt_layout_qualifier VARYING	{ $$.i = $1.i; $$.q.varying = 1; }
 	| CENTROID VARYING	{ $$.i = 0; $$.q.centroid = 1; $$.q.varying = 1; }
-	| IN			{ $$.i = 0; $$.q.in = 1; }
+	| opt_layout_qualifier IN	{ $$.i = 0; $$.q.in = 1; }
 	| OUT			{ $$.i = 0; $$.q.out = 1; }
 	| CENTROID IN		{ $$.i = 0; $$.q.centroid = 1; $$.q.in = 1; }
 	| CENTROID OUT		{ $$.i = 0; $$.q.centroid = 1; $$.q.out = 1; }