source/blender/nodes/shader/CMakeLists.txt

@@ -160,6 +160,7 @@ if(WITH_MATERIALX)
     materialx/nodes/bsdf_translucent.cc
     materialx/nodes/bsdf_transparent.cc
     materialx/nodes/clamp.cc
+    materialx/nodes/gamma.cc
     materialx/nodes/emission.cc
     materialx/nodes/huesatval.cc
     materialx/nodes/invert.cc

source/blender/nodes/shader/materialx/nodes/gamma.cc

@@ -0,0 +1,20 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "node_parser.h"
+
+namespace blender::nodes::materialx {
+
+NodeItem GammaNodeParser::compute()
+{
+  NodeItem color = get_input_value("Color", NodeItem::Type::Color3);
+  NodeItem gamma = get_input_value("Gamma", NodeItem::Type::Float);
+
+  NodeItem res = create_node("power", NodeItem::Type::Color3);
+  res.set_input("in1", color);
+  res.set_input("in2", gamma);
+  return res;
+}
+
+}  // namespace blender::nodes::materialx

source/blender/nodes/shader/materialx/nodes/node_parser.cc

@@ -152,6 +152,7 @@ NodeItem NodeParser::get_input_link(const bNodeSocket &socket, NodeItem::Type to
     CASE_NODE_TYPE(SH_NODE_BLACKBODY, BlackbodyNodeParser)
     CASE_NODE_TYPE(SH_NODE_BRIGHTCONTRAST, BrightContrastNodeParser)
     CASE_NODE_TYPE(SH_NODE_CLAMP, ClampNodeParser)
+    CASE_NODE_TYPE(SH_NODE_GAMMA, GammaNodeParser)
     CASE_NODE_TYPE(SH_NODE_COMBINE_COLOR, CombineColorNodeParser)
     CASE_NODE_TYPE(SH_NODE_COMBXYZ, CombineXYZNodeParser)
     CASE_NODE_TYPE(SH_NODE_HUE_SAT, HueSatValNodeParser)

source/blender/nodes/shader/materialx/nodes/node_parser.h

@@ -96,6 +96,7 @@ DECLARE_NODE_PARSER(BrightContrastNodeParser)
 DECLARE_NODE_PARSER(ClampNodeParser)
 DECLARE_NODE_PARSER(CombineColorNodeParser)
 DECLARE_NODE_PARSER(CombineXYZNodeParser)
+DECLARE_NODE_PARSER(GammaNodeParser)
 DECLARE_NODE_PARSER(HueSatValNodeParser)
 DECLARE_NODE_PARSER(InvertNodeParser)
 DECLARE_NODE_PARSER(MapRangeNodeParser)