gsksl: Allow an optional access qualifier of -1

Use this to mark optional access qualifiers as "do not write". For now
this is a good enough way to not write out access qualifiers, which is
disallowed in GLSL shaders.

2 files changed, 4 insertions, 1 deletions

diff --git a/gsk/gskspvwritergeneratedprivate.h b/gsk/gskspvwritergeneratedprivate.h
index 469ba56265..bad2caee21 100644
--- a/gsk/gskspvwritergeneratedprivate.h
+++ b/gsk/gskspvwritergeneratedprivate.h
@@ -411,7 +411,8 @@ gsk_spv_writer_type_image (GskSpvWriter *writer,
   g_array_append_val (bytes, ms);
   g_array_append_val (bytes, sampled);
   g_array_append_val (bytes, (guint32) { image_format });
-  g_array_append_val (bytes, (guint32) { opt_access_qualifier });
+  if (opt_access_qualifier != -1)
+    g_array_append_val (bytes, (guint32) { opt_access_qualifier });
   g_array_index (bytes, guint32, start_index) = (bytes->len - start_index) << 16 | GSK_SPV_OP_TYPE_IMAGE;
 
   return result_id;
diff --git a/gsk/spirv.js b/gsk/spirv.js
index acef648eef..a6eb89bcfa 100644
--- a/gsk/spirv.js
+++ b/gsk/spirv.js
@@ -475,6 +475,8 @@ for (let kind in spirv.operand_kinds)
                                 append_one: "g_array_append_val ({0}, (guint32) { {1} })" };
         if (kind.category == "BitEnum")
           Operands[kind.kind].optional_unset = "0";
+        if (kind.kind == "AccessQualifier")
+          Operands[kind.kind].optional_unset = "-1";
       }
   }