node_shader_invert.cc

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/* SPDX-FileCopyrightText: 2005 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "node_shader_util.hh"
 
namespace blender::nodes::node_shader_invert_cc {
 
static void node_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Float>("Factor", "Fac")
      .default_value(1.0f)
      .min(0.0f)
      .max(1.0f)
      .subtype(PROP_FACTOR)
      .description("Amount of influence the node exerts on the image");
  b.add_input<decl::Color>("Color")
      .default_value({0.0f, 0.0f, 0.0f, 1.0f})
      .description("Color input on which inversion will be applied");
  b.add_output<decl::Color>("Color");
}
 
static int gpu_shader_invert(GPUMaterial *mat,
                             bNode *node,
                             bNodeExecData * /*execdata*/,
                             GPUNodeStack *in,
                             GPUNodeStack *out)
{
  return GPU_stack_link(mat, node, "invert", in, out);
}
 
NODE_SHADER_MATERIALX_BEGIN
#ifdef WITH_MATERIALX
{
  NodeItem fac = get_input_value("Fac", NodeItem::Type::Float);
  NodeItem color = get_input_value("Color", NodeItem::Type::Color3);
  return fac.mix(color, val(1.0f) - color);
}
#endif
NODE_SHADER_MATERIALX_END
 
}  // namespace blender::nodes::node_shader_invert_cc
 
void register_node_type_sh_invert()
{
  namespace file_ns = blender::nodes::node_shader_invert_cc;
 
  static blender::bke::bNodeType ntype;
 
  sh_node_type_base(&ntype, "ShaderNodeInvert", SH_NODE_INVERT);
  ntype.ui_name = "Invert Color";
  ntype.ui_description = "Invert a color, producing a negative";
  ntype.enum_name_legacy = "INVERT";
  ntype.nclass = NODE_CLASS_OP_COLOR;
  ntype.declare = file_ns::node_declare;
  ntype.gpu_fn = file_ns::gpu_shader_invert;
  ntype.materialx_fn = file_ns::node_shader_materialx;
 
  blender::bke::node_register_type(ntype);
}