node_composite_invert.cc

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/* SPDX-FileCopyrightText: 2006 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "BLI_math_vector.hh"
#include "BLI_math_vector_types.hh"
 
#include "FN_multi_function_builder.hh"
 
#include "NOD_multi_function.hh"
 
#include "UI_resources.hh"
 
#include "GPU_material.hh"
 
#include "node_composite_util.hh"
 
/* **************** INVERT ******************** */
 
namespace blender::nodes::node_composite_invert_cc {
 
static void cmp_node_invert_declare(NodeDeclarationBuilder &b)
{
  b.use_custom_socket_order();
  b.allow_any_socket_order();
  b.is_function_node();
  b.add_input<decl::Color>("Color").default_value({1.0f, 1.0f, 1.0f, 1.0f}).hide_value();
  b.add_output<decl::Color>("Color").align_with_previous();
 
  b.add_input<decl::Float>("Factor", "Fac")
      .default_value(1.0f)
      .min(0.0f)
      .max(1.0f)
      .subtype(PROP_FACTOR);
  b.add_input<decl::Bool>("Invert Color").default_value(true);
  b.add_input<decl::Bool>("Invert Alpha").default_value(false);
}
 
using namespace blender::compositor;
 
static int node_gpu_material(GPUMaterial *material,
                             bNode *node,
                             bNodeExecData * /*execdata*/,
                             GPUNodeStack *inputs,
                             GPUNodeStack *outputs)
{
  return GPU_stack_link(material, node, "node_composite_invert", inputs, outputs);
}
 
static void node_build_multi_function(blender::nodes::NodeMultiFunctionBuilder &builder)
{
  static auto function = mf::build::SI4_SO<float4, float, bool, bool, float4>(
      "Invert Color",
      [](const float4 &color, const float factor, const bool invert_color, const bool invert_alpha)
          -> float4 {
        float4 result = color;
        if (invert_color) {
          result = float4(1.0f - result.xyz(), result.w);
        }
        if (invert_alpha) {
          result = float4(result.xyz(), 1.0f - result.w);
        }
        return math::interpolate(color, result, factor);
      },
      mf::build::exec_presets::SomeSpanOrSingle<0>());
  builder.set_matching_fn(function);
}
 
}  // namespace blender::nodes::node_composite_invert_cc
 
static void register_node_type_cmp_invert()
{
  namespace file_ns = blender::nodes::node_composite_invert_cc;
 
  static blender::bke::bNodeType ntype;
 
  cmp_node_type_base(&ntype, "CompositorNodeInvert", CMP_NODE_INVERT);
  ntype.ui_name = "Invert Color";
  ntype.ui_description = "Invert colors, producing a negative";
  ntype.enum_name_legacy = "INVERT";
  ntype.nclass = NODE_CLASS_OP_COLOR;
  ntype.declare = file_ns::cmp_node_invert_declare;
  ntype.gpu_fn = file_ns::node_gpu_material;
  ntype.build_multi_function = file_ns::node_build_multi_function;
 
  blender::bke::node_register_type(ntype);
}
NOD_REGISTER_NODE(register_node_type_cmp_invert)