Support visibility control and default to `internal`. (#3380)

* Support visibility control and default to `internal`.

* Fix wip.

* Fixes.

* Fix.

* Fix test.

* Add legacy language detection and compatibility for existing code.

* Add doc.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/tests/autodiff/material2/DiffuseMaterial.slang b/tests/autodiff/material2/DiffuseMaterial.slang
index 721445249..d4ae579ff 100644
--- a/tests/autodiff/material2/DiffuseMaterial.slang
+++ b/tests/autodiff/material2/DiffuseMaterial.slang
@@ -3,20 +3,20 @@
 __exported import IMaterial;
 __exported import DiffuseMaterialInstance;
 
-struct DiffuseMaterial : IMaterial
+public struct DiffuseMaterial : IMaterial
 {
-    float3 baseColor;
+    public float3 baseColor;
 
-    typedef DiffuseMaterialInstance MaterialInstance;
+    public typedef DiffuseMaterialInstance MaterialInstance;
 
     [TreatAsDifferentiable]
-    float3 getAlbedo(float3 albedo)
+    public float3 getAlbedo(float3 albedo)
     {
         return albedo;
     }
 
     [BackwardDifferentiable]
-    DiffuseMaterialInstance setupMaterialInstance(out MaterialInstanceData miData)
+    public DiffuseMaterialInstance setupMaterialInstance(out MaterialInstanceData miData)
     {
         float3 albedo = getAlbedo(baseColor);
         DiffuseMaterialInstance mi = { baseColor };