1 files changed, 88 insertions, 0 deletions
diff --git a/source/blender/nodes/shader/nodes/node_shader_clamp.cc b/source/blender/nodes/shader/nodes/node_shader_clamp.cc
new file mode 100644
index 00000000000..1077f616a62
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_clamp.cc
@@ -0,0 +1,88 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2005 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup shdnodes
+ */
+
+#include "node_shader_util.h"
+
+/* **************** Clamp ******************** */
+static bNodeSocketTemplate sh_node_clamp_in[] = {
+    {SOCK_FLOAT, N_("Value"), 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, PROP_NONE},
+    {SOCK_FLOAT, N_("Min"), 0.0f, 1.0f, 1.0f, 1.0f, -10000.0f, 10000.0f, PROP_NONE},
+    {SOCK_FLOAT, N_("Max"), 1.0f, 1.0f, 1.0f, 1.0f, -10000.0f, 10000.0f, PROP_NONE},
+    {-1, ""},
+};
+static bNodeSocketTemplate sh_node_clamp_out[] = {
+    {SOCK_FLOAT, N_("Result")},
+    {-1, ""},
+};
+
+static void node_shader_init_clamp(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  node->custom1 = NODE_CLAMP_MINMAX; /* clamp type */
+}
+
+static int gpu_shader_clamp(GPUMaterial *mat,
+                            bNode *node,
+                            bNodeExecData *UNUSED(execdata),
+                            GPUNodeStack *in,
+                            GPUNodeStack *out)
+{
+  return (node->custom1 == NODE_CLAMP_MINMAX) ? GPU_stack_link(mat, node, "clamp_value", in, out) :
+                                                GPU_stack_link(mat, node, "clamp_range", in, out);
+}
+
+static void sh_node_clamp_expand_in_mf_network(blender::nodes::NodeMFNetworkBuilder &builder)
+{
+  static blender::fn::CustomMF_SI_SI_SI_SO<float, float, float, float> minmax_fn{
+      "Clamp (Min Max)",
+      [](float value, float min, float max) { return std::min(std::max(value, min), max); }};
+  static blender::fn::CustomMF_SI_SI_SI_SO<float, float, float, float> range_fn{
+      "Clamp (Range)", [](float value, float a, float b) {
+        if (a < b) {
+          return clamp_f(value, a, b);
+        }
+        else {
+          return clamp_f(value, b, a);
+        }
+      }};
+
+  int clamp_type = builder.bnode().custom1;
+  if (clamp_type == NODE_CLAMP_MINMAX) {
+    builder.set_matching_fn(minmax_fn);
+  }
+  else {
+    builder.set_matching_fn(range_fn);
+  }
+}
+
+void register_node_type_sh_clamp(void)
+{
+  static bNodeType ntype;
+
+  sh_fn_node_type_base(&ntype, SH_NODE_CLAMP, "Clamp", NODE_CLASS_CONVERTOR, 0);
+  node_type_socket_templates(&ntype, sh_node_clamp_in, sh_node_clamp_out);
+  node_type_init(&ntype, node_shader_init_clamp);
+  node_type_gpu(&ntype, gpu_shader_clamp);
+  ntype.expand_in_mf_network = sh_node_clamp_expand_in_mf_network;
+
+  nodeRegisterType(&ntype);
+}