COM_AlphaOverNode.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_AlphaOverNode.h"
 
#include "COM_AlphaOverKeyOperation.h"
#include "COM_AlphaOverMixedOperation.h"
#include "COM_AlphaOverPremultiplyOperation.h"
#include "COM_MixOperation.h"
 
#include "COM_SetValueOperation.h"
#include "DNA_material_types.h" /* the ramp types */
 
namespace blender::compositor {
 
void AlphaOverNode::convertToOperations(NodeConverter &converter,
                                        const CompositorContext & /*context*/) const
{
  NodeInput *color1Socket = this->getInputSocket(1);
  NodeInput *color2Socket = this->getInputSocket(2);
  bNode *editorNode = this->getbNode();
 
  MixBaseOperation *convertProg;
  NodeTwoFloats *ntf = (NodeTwoFloats *)editorNode->storage;
  if (ntf->x != 0.0f) {
    AlphaOverMixedOperation *mixOperation = new AlphaOverMixedOperation();
    mixOperation->setX(ntf->x);
    convertProg = mixOperation;
  }
  else if (editorNode->custom1) {
    convertProg = new AlphaOverKeyOperation();
  }
  else {
    convertProg = new AlphaOverPremultiplyOperation();
  }
 
  convertProg->setUseValueAlphaMultiply(false);
  if (color1Socket->isLinked()) {
    convertProg->setResolutionInputSocketIndex(1);
  }
  else if (color2Socket->isLinked()) {
    convertProg->setResolutionInputSocketIndex(2);
  }
  else {
    convertProg->setResolutionInputSocketIndex(0);
  }
 
  converter.addOperation(convertProg);
  converter.mapInputSocket(getInputSocket(0), convertProg->getInputSocket(0));
  converter.mapInputSocket(getInputSocket(1), convertProg->getInputSocket(1));
  converter.mapInputSocket(getInputSocket(2), convertProg->getInputSocket(2));
  converter.mapOutputSocket(getOutputSocket(0), convertProg->getOutputSocket(0));
}
 
}  // namespace blender::compositor