/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2006 Blender Foundation. All rights reserved. */

/** \file
 * \ingroup cmpnodes
 */

#include "GPU_material.h"

#include "COM_shader_node.hh"

#include "node_composite_util.hh"

/* **************** NORMAL  ******************** */

namespace blender::nodes::node_composite_normal_cc {

static void cmp_node_normal_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Vector>(N_("Normal"))
      .default_value({0.0f, 0.0f, 1.0f})
      .min(-1.0f)
      .max(1.0f)
      .subtype(PROP_DIRECTION)
      .compositor_domain_priority(0);
  b.add_output<decl::Vector>(N_("Normal"))
      .default_value({0.0f, 0.0f, 1.0f})
      .min(-1.0f)
      .max(1.0f)
      .subtype(PROP_DIRECTION);
  b.add_output<decl::Float>(N_("Dot"));
}

using namespace blender::realtime_compositor;

class NormalShaderNode : public ShaderNode {
 public:
  using ShaderNode::ShaderNode;

  void compile(GPUMaterial *material) override
  {
    GPUNodeStack *inputs = get_inputs_array();
    GPUNodeStack *outputs = get_outputs_array();

    GPU_stack_link(material,
                   &bnode(),
                   "node_composite_normal",
                   inputs,
                   outputs,
                   GPU_uniform(get_vector_value()));
  }

  /* The vector value is stored in the default value of the output socket. */
  const float *get_vector_value()
  {
    return node()
        .output_by_identifier("Normal")
        ->default_value_typed<bNodeSocketValueVector>()
        ->value;
  }
};

static ShaderNode *get_compositor_shader_node(DNode node)
{
  return new NormalShaderNode(node);
}

}  // namespace blender::nodes::node_composite_normal_cc

void register_node_type_cmp_normal()
{
  namespace file_ns = blender::nodes::node_composite_normal_cc;

  static bNodeType ntype;

  cmp_node_type_base(&ntype, CMP_NODE_NORMAL, "Normal", NODE_CLASS_OP_VECTOR);
  ntype.declare = file_ns::cmp_node_normal_declare;
  ntype.get_compositor_shader_node = file_ns::get_compositor_shader_node;

  nodeRegisterType(&ntype);
}