/* SPDX-FileCopyrightText: 2011 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

#include "COM_ViewerNode.h"

#include "COM_ViewerOperation.h"

namespace blender::compositor {

ViewerNode::ViewerNode(bNode *editor_node) : Node(editor_node)
{
  /* pass */
}

void ViewerNode::convert_to_operations(NodeConverter &converter,
                                       const CompositorContext &context) const
{
  const bNode *editor_node = this->get_bnode();
  bool is_active = (editor_node->flag & NODE_DO_OUTPUT_RECALC || context.is_rendering()) &&
                   (editor_node->flag & NODE_DO_OUTPUT);
  bool ignore_alpha = (editor_node->custom2 & CMP_NODE_OUTPUT_IGNORE_ALPHA) != 0;

  NodeInput *image_socket = this->get_input_socket(0);
  NodeInput *alpha_socket = this->get_input_socket(1);
  Image *image = (Image *)this->get_bnode()->id;
  ImageUser *image_user = (ImageUser *)this->get_bnode()->storage;
  ViewerOperation *viewer_operation = new ViewerOperation();
  viewer_operation->set_bnodetree(context.get_bnodetree());
  viewer_operation->set_image(image);
  viewer_operation->set_image_user(image_user);
  /* alpha socket gives either 1 or a custom alpha value if "use alpha" is enabled */
  viewer_operation->set_use_alpha_input(ignore_alpha || alpha_socket->is_linked());
  viewer_operation->set_render_data(context.get_render_data());
  viewer_operation->set_view_name(context.get_view_name());

  Scene *scene = context.get_scene();
  viewer_operation->set_view_settings(&scene->view_settings);
  viewer_operation->set_display_settings(&scene->display_settings);

  viewer_operation->set_canvas_input_index(0);
  if (!image_socket->is_linked()) {
    if (alpha_socket->is_linked()) {
      viewer_operation->set_canvas_input_index(1);
    }
  }

  converter.add_operation(viewer_operation);
  converter.map_input_socket(image_socket, viewer_operation->get_input_socket(0));
  /* only use alpha link if "use alpha" is enabled */
  if (ignore_alpha) {
    converter.add_input_value(viewer_operation->get_input_socket(1), 1.0f);
  }
  else {
    converter.map_input_socket(alpha_socket, viewer_operation->get_input_socket(1));
  }

  converter.add_node_input_preview(image_socket);

  if (is_active) {
    converter.register_viewer(viewer_operation);
  }
}

}  // namespace blender::compositor
