1 files changed, 43 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/invert.h b/intern/cycles/kernel/svm/invert.h
new file mode 100644
index 00000000000..5a88e9df2c9
--- /dev/null
+++ b/intern/cycles/kernel/svm/invert.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2011-2013 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
+
+ccl_device float invert(float color, float factor)
+{
+  return factor * (1.0f - color) + (1.0f - factor) * color;
+}
+
+ccl_device_noinline void svm_node_invert(ccl_private ShaderData *sd,
+                                         ccl_private float *stack,
+                                         uint in_fac,
+                                         uint in_color,
+                                         uint out_color)
+{
+  float factor = stack_load_float(stack, in_fac);
+  float3 color = stack_load_float3(stack, in_color);
+
+  color.x = invert(color.x, factor);
+  color.y = invert(color.y, factor);
+  color.z = invert(color.z, factor);
+
+  if (stack_valid(out_color))
+    stack_store_float3(stack, out_color, color);
+}
+
+CCL_NAMESPACE_END