COM_AlphaOverNode.cc

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/* SPDX-FileCopyrightText: 2011 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "COM_AlphaOverNode.h"
 
#include "COM_AlphaOverKeyOperation.h"
#include "COM_AlphaOverMixedOperation.h"
#include "COM_AlphaOverPremultiplyOperation.h"
 
namespace blender::compositor {
 
void AlphaOverNode::convert_to_operations(NodeConverter &converter,
                                          const CompositorContext & /*context*/) const
{
  NodeInput *color1Socket = this->get_input_socket(1);
  NodeInput *color2Socket = this->get_input_socket(2);
  const bNode *editor_node = this->get_bnode();
 
  MixBaseOperation *convert_prog;
  const NodeTwoFloats *ntf = (const NodeTwoFloats *)editor_node->storage;
  if (ntf->x != 0.0f) {
    AlphaOverMixedOperation *mix_operation = new AlphaOverMixedOperation();
    mix_operation->setX(ntf->x);
    convert_prog = mix_operation;
  }
  else if (editor_node->custom1) {
    convert_prog = new AlphaOverKeyOperation();
  }
  else {
    convert_prog = new AlphaOverPremultiplyOperation();
  }
 
  convert_prog->set_use_value_alpha_multiply(false);
  if (color1Socket->is_linked()) {
    convert_prog->set_canvas_input_index(1);
  }
  else if (color2Socket->is_linked()) {
    convert_prog->set_canvas_input_index(2);
  }
  else {
    convert_prog->set_canvas_input_index(0);
  }
 
  converter.add_operation(convert_prog);
  converter.map_input_socket(get_input_socket(0), convert_prog->get_input_socket(0));
  converter.map_input_socket(get_input_socket(1), convert_prog->get_input_socket(1));
  converter.map_input_socket(get_input_socket(2), convert_prog->get_input_socket(2));
  converter.map_output_socket(get_output_socket(0), convert_prog->get_output_socket(0));
}
 
}  // namespace blender::compositor