1 files changed, 61 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/bump.h b/intern/cycles/kernel/svm/bump.h
new file mode 100644
index 00000000000..2fae06fa54b
--- /dev/null
+++ b/intern/cycles/kernel/svm/bump.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2011-2016 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+CCL_NAMESPACE_BEGIN
+
+/* Bump Eval Nodes */
+
+ccl_device_noinline void svm_node_enter_bump_eval(KernelGlobals kg,
+                                                  ccl_private ShaderData *sd,
+                                                  ccl_private float *stack,
+                                                  uint offset)
+{
+  /* save state */
+  stack_store_float3(stack, offset + 0, sd->P);
+  stack_store_float3(stack, offset + 3, sd->dP.dx);
+  stack_store_float3(stack, offset + 6, sd->dP.dy);
+
+  /* set state as if undisplaced */
+  const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_POSITION_UNDISPLACED);
+
+  if (desc.offset != ATTR_STD_NOT_FOUND) {
+    float3 P, dPdx, dPdy;
+    P = primitive_surface_attribute_float3(kg, sd, desc, &dPdx, &dPdy);
+
+    object_position_transform(kg, sd, &P);
+    object_dir_transform(kg, sd, &dPdx);
+    object_dir_transform(kg, sd, &dPdy);
+
+    sd->P = P;
+    sd->dP.dx = dPdx;
+    sd->dP.dy = dPdy;
+  }
+}
+
+ccl_device_noinline void svm_node_leave_bump_eval(KernelGlobals kg,
+                                                  ccl_private ShaderData *sd,
+                                                  ccl_private float *stack,
+                                                  uint offset)
+{
+  /* restore state */
+  sd->P = stack_load_float3(stack, offset + 0);
+  sd->dP.dx = stack_load_float3(stack, offset + 3);
+  sd->dP.dy = stack_load_float3(stack, offset + 6);
+}
+
+CCL_NAMESPACE_END