[Mesa-dev] [PATCH] glsl: geom shader max_vertices layout must match.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

"all geometry shader output vertex count declarations in a
program must declare the same count."

Fixes:
GL45-CTS.geometry_shader.output.conflicted_output_vertices_max

Cc: "11.2 12.0" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/compiler/glsl/ast.h                  |  3 ++-
 src/compiler/glsl/ast_type.cpp           | 17 ++++++++++-------
 src/compiler/glsl/glsl_parser_extras.cpp |  2 +-
 3 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/compiler/glsl/ast.h b/src/compiler/glsl/ast.h
index ca98ed2..06c7b03 100644
--- a/src/compiler/glsl/ast.h
+++ b/src/compiler/glsl/ast.h
@@ -368,7 +368,8 @@ public:
 
    bool process_qualifier_constant(struct _mesa_glsl_parse_state *state,
                                    const char *qual_indentifier,
-                                   unsigned *value, bool can_be_zero);
+                                   unsigned *value, bool can_be_zero,
+                                   bool must_match = false);
 
    void merge_qualifier(ast_layout_expression *l_expr)
    {
diff --git a/src/compiler/glsl/ast_type.cpp b/src/compiler/glsl/ast_type.cpp
index 54e9dad..1372ff7 100644
--- a/src/compiler/glsl/ast_type.cpp
+++ b/src/compiler/glsl/ast_type.cpp
@@ -678,7 +678,8 @@ bool
 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
                                                   const char *qual_indentifier,
                                                   unsigned *value,
-                                                  bool can_be_zero)
+                                                  bool can_be_zero,
+                                                  bool must_match)
 {
    int min_value = 0;
    bool first_pass = true;
@@ -716,12 +717,14 @@ ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state
        *  in a single declaration, the last occurrence overrides the
        *  former occurrence(s)."
        */
-      if (!state->has_420pack() && !first_pass && *value != const_int->value.u[0]) {
-         YYLTYPE loc = const_expression->get_location();
-         _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
-		          "match previous declaration (%d vs %d)",
-                          qual_indentifier, *value, const_int->value.i[0]);
-         return false;
+      if (!first_pass) {
+         if ((must_match || !state->has_420pack()) && *value != const_int->value.u[0]) {
+            YYLTYPE loc = const_expression->get_location();
+            _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
+                             "match previous declaration (%d vs %d)",
+                             qual_indentifier, *value, const_int->value.i[0]);
+            return false;
+         }
       } else {
          first_pass = false;
          *value = const_int->value.u[0];
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index c9654ac..ba658ae 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -1692,7 +1692,7 @@ set_shader_inout_layout(struct gl_shader *shader,
          unsigned qual_max_vertices;
          if (state->out_qualifier->max_vertices->
                process_qualifier_constant(state, "max_vertices",
-                                          &qual_max_vertices, true)) {
+                                          &qual_max_vertices, true, true)) {
 
             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
-- 
2.5.5