From eca846e7ae3721c900ad78db300bbc66b08a3cc3 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Mon, 7 Dec 2015 14:18:38 -0800
Subject: [PATCH] glsl: Relax qualifier ordering restriction in ES 3.1.

... and allow the "binding" qualifier in ES 3.1 as well.

GLSL ES 3.1 incorporates only a few features from the extension
ARB_shading_language_420pack: the relaxed qualifier ordering
requirements and the binding qualifier.

Cc: "11.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---
 src/glsl/glsl_parser.yy       | 20 ++++++++++----------
 src/glsl/glsl_parser_extras.h |  5 +++++
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index 5a8f98019d1..7eb383ac60c 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -948,7 +948,7 @@ parameter_qualifier:
       if (($1.flags.q.in || $1.flags.q.out) && ($2.flags.q.in || $2.flags.q.out))
          _mesa_glsl_error(&@1, state, "duplicate in/out/inout qualifier");
 
-      if (!state->has_420pack() && $2.flags.q.constant)
+      if (!state->has_420pack_or_es31() && $2.flags.q.constant)
          _mesa_glsl_error(&@1, state, "in/out/inout must come after const "
                                       "or precise");
 
@@ -960,7 +960,7 @@ parameter_qualifier:
       if ($2.precision != ast_precision_none)
          _mesa_glsl_error(&@1, state, "duplicate precision qualifier");
 
-      if (!(state->has_420pack() || state->is_version(420, 310)) &&
+      if (!state->has_420pack_or_es31() &&
           $2.flags.i != 0)
          _mesa_glsl_error(&@1, state, "precision qualifiers must come last");
 
@@ -1482,7 +1482,7 @@ layout_qualifier_id:
          $$.index = $3;
       }
 
-      if ((state->has_420pack() ||
+      if ((state->has_420pack_or_es31() ||
            state->has_atomic_counters() ||
            state->has_shader_storage_buffer_objects()) &&
           match_layout_qualifier("binding", $1, state) == 0) {
@@ -1714,7 +1714,7 @@ type_qualifier:
       if ($2.flags.q.invariant)
          _mesa_glsl_error(&@1, state, "duplicate \"invariant\" qualifier");
 
-      if (!state->has_420pack() && $2.flags.q.precise)
+      if (!state->has_420pack_or_es31() && $2.flags.q.precise)
          _mesa_glsl_error(&@1, state,
                           "\"invariant\" must come after \"precise\"");
 
@@ -1747,7 +1747,7 @@ type_qualifier:
       if ($2.has_interpolation())
          _mesa_glsl_error(&@1, state, "duplicate interpolation qualifier");
 
-      if (!state->has_420pack() &&
+      if (!state->has_420pack_or_es31() &&
           ($2.flags.q.precise || $2.flags.q.invariant)) {
          _mesa_glsl_error(&@1, state, "interpolation qualifiers must come "
                           "after \"precise\" or \"invariant\"");
@@ -1767,7 +1767,7 @@ type_qualifier:
        * precise qualifiers since these are useful in ARB_separate_shader_objects.
        * There is no clear spec guidance on this either.
        */
-      if (!state->has_420pack() && $2.has_layout())
+      if (!state->has_420pack_or_es31() && $2.has_layout())
          _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
 
       $$ = $1;
@@ -1785,7 +1785,7 @@ type_qualifier:
                           "duplicate auxiliary storage qualifier (centroid or sample)");
       }
 
-      if (!state->has_420pack() &&
+      if (!state->has_420pack_or_es31() &&
           ($2.flags.q.precise || $2.flags.q.invariant ||
            $2.has_interpolation() || $2.has_layout())) {
          _mesa_glsl_error(&@1, state, "auxiliary storage qualifiers must come "
@@ -1803,7 +1803,7 @@ type_qualifier:
       if ($2.has_storage())
          _mesa_glsl_error(&@1, state, "duplicate storage qualifier");
 
-      if (!state->has_420pack() &&
+      if (!state->has_420pack_or_es31() &&
           ($2.flags.q.precise || $2.flags.q.invariant || $2.has_interpolation() ||
            $2.has_layout() || $2.has_auxiliary_storage())) {
          _mesa_glsl_error(&@1, state, "storage qualifiers must come after "
@@ -1819,7 +1819,7 @@ type_qualifier:
       if ($2.precision != ast_precision_none)
          _mesa_glsl_error(&@1, state, "duplicate precision qualifier");
 
-      if (!(state->has_420pack() || state->is_version(420, 310)) &&
+      if (!(state->has_420pack_or_es31()) &&
           $2.flags.i != 0)
          _mesa_glsl_error(&@1, state, "precision qualifiers must come last");
 
@@ -2575,7 +2575,7 @@ interface_block:
    {
       ast_interface_block *block = (ast_interface_block *) $2;
 
-      if (!state->has_420pack() && block->layout.has_layout() &&
+      if (!state->has_420pack_or_es31() && block->layout.has_layout() &&
           !block->layout.is_default_qualifier) {
          _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
          YYERROR;
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 17ff0b5af79..6bded3eac0c 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -255,6 +255,11 @@ struct _mesa_glsl_parse_state {
       return ARB_shading_language_420pack_enable || is_version(420, 0);
    }
 
+   bool has_420pack_or_es31() const
+   {
+      return ARB_shading_language_420pack_enable || is_version(420, 310);
+   }
+
    bool has_compute_shader() const
    {
       return ARB_compute_shader_enable || is_version(430, 310);
-- 
2.30.2