glsl: parse invocations layout qualifier for ARB_gpu_shader5

_mesa_glsl_parse_state in_qualifier->invocations will store the
invocations count.

v3:
 * Use in_qualifier to allow the primitive to be specied
   separately from the invocations count (merge_qualifiers)

Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Anuj Phogat <[email protected]>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index c3fa4555e14..1df5722548d 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -1387,6 +1387,29 @@ layout_qualifier_id:
          }
       }
 
+      if (match_layout_qualifier("invocations", $1, state) == 0) {
+         $$.flags.q.invocations = 1;
+
+         if ($3 <= 0) {
+            _mesa_glsl_error(& @3, state,
+                             "invalid invocations %d specified", $3);
+            YYERROR;
+         } else if ($3 > MAX_GEOMETRY_SHADER_INVOCATIONS) {
+            _mesa_glsl_error(& @3, state,
+                             "invocations (%d) exceeds "
+                             "GL_MAX_GEOMETRY_SHADER_INVOCATIONS", $3);
+            YYERROR;
+         } else {
+            $$.invocations = $3;
+            if (!state->is_version(400, 0) &&
+                !state->ARB_gpu_shader5_enable) {
+               _mesa_glsl_error(& @3, state,
+                                "GL_ARB_gpu_shader5 invocations "
+                                "qualifier specified", $3);
+            }
+         }
+      }
+
       /* If the identifier didn't match any known layout identifiers,
        * emit an error.
        */