1 files changed, 38 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/osl.h b/intern/cycles/kernel/osl/osl.h
new file mode 100644
index 00000000000..bef23f3eea1
--- /dev/null
+++ b/intern/cycles/kernel/osl/osl.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#pragma once
+
+/* OSL Shader Engine
+ *
+ * Holds all variables to execute and use OSL shaders from the kernel. These
+ * are initialized externally by OSLShaderManager before rendering starts.
+ *
+ * Before/after a thread starts rendering, thread_init/thread_free must be
+ * called, which will store any per thread OSL state in thread local storage.
+ * This means no thread state must be passed along in the kernel itself.
+ */
+
+#include "kernel/osl/types.h"
+
+CCL_NAMESPACE_BEGIN
+
+class OSLShader {
+ public:
+  /* eval */
+  static void eval_surface(const KernelGlobalsCPU *kg,
+                           const void *state,
+                           ShaderData *sd,
+                           uint32_t path_flag);
+  static void eval_background(const KernelGlobalsCPU *kg,
+                              const void *state,
+                              ShaderData *sd,
+                              uint32_t path_flag);
+  static void eval_volume(const KernelGlobalsCPU *kg,
+                          const void *state,
+                          ShaderData *sd,
+                          uint32_t path_flag);
+  static void eval_displacement(const KernelGlobalsCPU *kg, const void *state, ShaderData *sd);
+};
+
+CCL_NAMESPACE_END