COM_FilterNode.cc

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Copyright 2011, Blender Foundation.
 */
 
#include "COM_FilterNode.h"
#include "BKE_node.h"
#include "COM_ConvolutionEdgeFilterOperation.h"
#include "COM_ConvolutionFilterOperation.h"
#include "COM_ExecutionSystem.h"
#include "COM_MixOperation.h"
 
namespace blender::compositor {
 
FilterNode::FilterNode(bNode *editorNode) : Node(editorNode)
{
  /* pass */
}
 
void FilterNode::convertToOperations(NodeConverter &converter,
                                     const CompositorContext & /*context*/) const
{
  NodeInput *inputSocket = this->getInputSocket(0);
  NodeInput *inputImageSocket = this->getInputSocket(1);
  NodeOutput *outputSocket = this->getOutputSocket(0);
  ConvolutionFilterOperation *operation = nullptr;
 
  switch (this->getbNode()->custom1) {
    case CMP_FILT_SOFT:
      operation = new ConvolutionFilterOperation();
      operation->set3x3Filter(1 / 16.0f,
                              2 / 16.0f,
                              1 / 16.0f,
                              2 / 16.0f,
                              4 / 16.0f,
                              2 / 16.0f,
                              1 / 16.0f,
                              2 / 16.0f,
                              1 / 16.0f);
      break;
    case CMP_FILT_SHARP:
      operation = new ConvolutionFilterOperation();
      operation->set3x3Filter(-1, -1, -1, -1, 9, -1, -1, -1, -1);
      break;
    case CMP_FILT_LAPLACE:
      operation = new ConvolutionEdgeFilterOperation();
      operation->set3x3Filter(-1 / 8.0f,
                              -1 / 8.0f,
                              -1 / 8.0f,
                              -1 / 8.0f,
                              1.0f,
                              -1 / 8.0f,
                              -1 / 8.0f,
                              -1 / 8.0f,
                              -1 / 8.0f);
      break;
    case CMP_FILT_SOBEL:
      operation = new ConvolutionEdgeFilterOperation();
      operation->set3x3Filter(1, 2, 1, 0, 0, 0, -1, -2, -1);
      break;
    case CMP_FILT_PREWITT:
      operation = new ConvolutionEdgeFilterOperation();
      operation->set3x3Filter(1, 1, 1, 0, 0, 0, -1, -1, -1);
      break;
    case CMP_FILT_KIRSCH:
      operation = new ConvolutionEdgeFilterOperation();
      operation->set3x3Filter(5, 5, 5, -3, -3, -3, -2, -2, -2);
      break;
    case CMP_FILT_SHADOW:
      operation = new ConvolutionFilterOperation();
      operation->set3x3Filter(1, 2, 1, 0, 1, 0, -1, -2, -1);
      break;
    default:
      operation = new ConvolutionFilterOperation();
      operation->set3x3Filter(0, 0, 0, 0, 1, 0, 0, 0, 0);
      break;
  }
  converter.addOperation(operation);
 
  converter.mapInputSocket(inputImageSocket, operation->getInputSocket(0));
  converter.mapInputSocket(inputSocket, operation->getInputSocket(1));
  converter.mapOutputSocket(outputSocket, operation->getOutputSocket());
 
  converter.addPreview(operation->getOutputSocket(0));
}
 
}  // namespace blender::compositor