/*
 * 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_BlurNode.h"
#include "COM_ExecutionSystem.h"
#include "COM_FastGaussianBlurOperation.h"
#include "COM_GammaCorrectOperation.h"
#include "COM_GaussianAlphaXBlurOperation.h"
#include "COM_GaussianAlphaYBlurOperation.h"
#include "COM_GaussianBokehBlurOperation.h"
#include "COM_GaussianXBlurOperation.h"
#include "COM_GaussianYBlurOperation.h"
#include "COM_MathBaseOperation.h"
#include "COM_SetValueOperation.h"
#include "DNA_node_types.h"

namespace blender::compositor {

BlurNode::BlurNode(bNode *editorNode) : Node(editorNode)
{
  /* pass */
}

void BlurNode::convertToOperations(NodeConverter &converter,
                                   const CompositorContext &context) const
{
  bNode *editorNode = this->getbNode();
  NodeBlurData *data = (NodeBlurData *)editorNode->storage;
  NodeInput *inputSizeSocket = this->getInputSocket(1);
  bool connectedSizeSocket = inputSizeSocket->isLinked();

  const float size = this->getInputSocket(1)->getEditorValueFloat();
  const bool extend_bounds = (editorNode->custom1 & CMP_NODEFLAG_BLUR_EXTEND_BOUNDS) != 0;

  eCompositorQuality quality = context.getQuality();
  NodeOperation *input_operation = nullptr, *output_operation = nullptr;

  if (data->filtertype == R_FILTER_FAST_GAUSS) {
    FastGaussianBlurOperation *operationfgb = new FastGaussianBlurOperation();
    operationfgb->setData(data);
    operationfgb->setExtendBounds(extend_bounds);
    converter.addOperation(operationfgb);

    converter.mapInputSocket(getInputSocket(1), operationfgb->getInputSocket(1));

    input_operation = operationfgb;
    output_operation = operationfgb;
  }
  else if (editorNode->custom1 & CMP_NODEFLAG_BLUR_VARIABLE_SIZE) {
    MathAddOperation *clamp = new MathAddOperation();
    SetValueOperation *zero = new SetValueOperation();
    zero->setValue(0.0f);
    clamp->setUseClamp(true);

    converter.addOperation(clamp);
    converter.addOperation(zero);
    converter.mapInputSocket(getInputSocket(1), clamp->getInputSocket(0));
    converter.addLink(zero->getOutputSocket(), clamp->getInputSocket(1));

    GaussianAlphaXBlurOperation *operationx = new GaussianAlphaXBlurOperation();
    operationx->setData(data);
    operationx->setQuality(quality);
    operationx->setSize(1.0f);
    operationx->setFalloff(PROP_SMOOTH);
    operationx->setSubtract(false);
    operationx->setExtendBounds(extend_bounds);

    converter.addOperation(operationx);
    converter.addLink(clamp->getOutputSocket(), operationx->getInputSocket(0));

    GaussianAlphaYBlurOperation *operationy = new GaussianAlphaYBlurOperation();
    operationy->setData(data);
    operationy->setQuality(quality);
    operationy->setSize(1.0f);
    operationy->setFalloff(PROP_SMOOTH);
    operationy->setSubtract(false);
    operationy->setExtendBounds(extend_bounds);

    converter.addOperation(operationy);
    converter.addLink(operationx->getOutputSocket(), operationy->getInputSocket(0));

    GaussianBlurReferenceOperation *operation = new GaussianBlurReferenceOperation();
    operation->setData(data);
    operation->setQuality(quality);
    operation->setExtendBounds(extend_bounds);

    converter.addOperation(operation);
    converter.addLink(operationy->getOutputSocket(), operation->getInputSocket(1));

    output_operation = operation;
    input_operation = operation;
  }
  else if (!data->bokeh) {
    GaussianXBlurOperation *operationx = new GaussianXBlurOperation();
    operationx->setData(data);
    operationx->setQuality(quality);
    operationx->checkOpenCL();
    operationx->setExtendBounds(extend_bounds);

    converter.addOperation(operationx);
    converter.mapInputSocket(getInputSocket(1), operationx->getInputSocket(1));

    GaussianYBlurOperation *operationy = new GaussianYBlurOperation();
    operationy->setData(data);
    operationy->setQuality(quality);
    operationy->checkOpenCL();
    operationy->setExtendBounds(extend_bounds);

    converter.addOperation(operationy);
    converter.mapInputSocket(getInputSocket(1), operationy->getInputSocket(1));
    converter.addLink(operationx->getOutputSocket(), operationy->getInputSocket(0));

    if (!connectedSizeSocket) {
      operationx->setSize(size);
      operationy->setSize(size);
    }

    input_operation = operationx;
    output_operation = operationy;
  }
  else {
    GaussianBokehBlurOperation *operation = new GaussianBokehBlurOperation();
    operation->setData(data);
    operation->setQuality(quality);
    operation->setExtendBounds(extend_bounds);

    converter.addOperation(operation);
    converter.mapInputSocket(getInputSocket(1), operation->getInputSocket(1));

    if (!connectedSizeSocket) {
      operation->setSize(size);
    }

    input_operation = operation;
    output_operation = operation;
  }

  if (data->gamma) {
    GammaCorrectOperation *correct = new GammaCorrectOperation();
    GammaUncorrectOperation *inverse = new GammaUncorrectOperation();
    converter.addOperation(correct);
    converter.addOperation(inverse);

    converter.mapInputSocket(getInputSocket(0), correct->getInputSocket(0));
    converter.addLink(correct->getOutputSocket(), input_operation->getInputSocket(0));
    converter.addLink(output_operation->getOutputSocket(), inverse->getInputSocket(0));
    converter.mapOutputSocket(getOutputSocket(), inverse->getOutputSocket());

    converter.addPreview(inverse->getOutputSocket());
  }
  else {
    converter.mapInputSocket(getInputSocket(0), input_operation->getInputSocket(0));
    converter.mapOutputSocket(getOutputSocket(), output_operation->getOutputSocket());

    converter.addPreview(output_operation->getOutputSocket());
  }
}

}  // namespace blender::compositor
