/*
 * 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_DilateErodeNode.h"
#include "COM_ExecutionSystem.h"
#include "COM_DilateErodeOperation.h"
#include "COM_AntiAliasOperation.h"
#include "COM_GaussianAlphaXBlurOperation.h"
#include "COM_GaussianAlphaYBlurOperation.h"
#include "BLI_math.h"

DilateErodeNode::DilateErodeNode(bNode *editorNode) : Node(editorNode)
{
  /* initialize node data */
  NodeBlurData *data = &m_alpha_blur;
  memset(data, 0, sizeof(NodeBlurData));
  data->filtertype = R_FILTER_GAUSS;

  if (editorNode->custom2 > 0) {
    data->sizex = data->sizey = editorNode->custom2;
  }
  else {
    data->sizex = data->sizey = -editorNode->custom2;
  }
}

void DilateErodeNode::convertToOperations(NodeConverter &converter,
                                          const CompositorContext &context) const
{

  bNode *editorNode = this->getbNode();
  if (editorNode->custom1 == CMP_NODE_DILATEERODE_DISTANCE_THRESH) {
    DilateErodeThresholdOperation *operation = new DilateErodeThresholdOperation();
    operation->setDistance(editorNode->custom2);
    operation->setInset(editorNode->custom3);
    converter.addOperation(operation);

    converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));

    if (editorNode->custom3 < 2.0f) {
      AntiAliasOperation *antiAlias = new AntiAliasOperation();
      converter.addOperation(antiAlias);

      converter.addLink(operation->getOutputSocket(), antiAlias->getInputSocket(0));
      converter.mapOutputSocket(getOutputSocket(0), antiAlias->getOutputSocket(0));
    }
    else {
      converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket(0));
    }
  }
  else if (editorNode->custom1 == CMP_NODE_DILATEERODE_DISTANCE) {
    if (editorNode->custom2 > 0) {
      DilateDistanceOperation *operation = new DilateDistanceOperation();
      operation->setDistance(editorNode->custom2);
      converter.addOperation(operation);

      converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));
      converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket(0));
    }
    else {
      ErodeDistanceOperation *operation = new ErodeDistanceOperation();
      operation->setDistance(-editorNode->custom2);
      converter.addOperation(operation);

      converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));
      converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket(0));
    }
  }
  else if (editorNode->custom1 == CMP_NODE_DILATEERODE_DISTANCE_FEATHER) {
    /* this uses a modified gaussian blur function otherwise its far too slow */
    CompositorQuality quality = context.getQuality();

    GaussianAlphaXBlurOperation *operationx = new GaussianAlphaXBlurOperation();
    operationx->setData(&m_alpha_blur);
    operationx->setQuality(quality);
    operationx->setFalloff(PROP_SMOOTH);
    converter.addOperation(operationx);

    converter.mapInputSocket(getInputSocket(0), operationx->getInputSocket(0));
    // converter.mapInputSocket(getInputSocket(1), operationx->getInputSocket(1)); // no size input
    // yet

    GaussianAlphaYBlurOperation *operationy = new GaussianAlphaYBlurOperation();
    operationy->setData(&m_alpha_blur);
    operationy->setQuality(quality);
    operationy->setFalloff(PROP_SMOOTH);
    converter.addOperation(operationy);

    converter.addLink(operationx->getOutputSocket(), operationy->getInputSocket(0));
    // converter.mapInputSocket(getInputSocket(1), operationy->getInputSocket(1)); // no size input
    // yet
    converter.mapOutputSocket(getOutputSocket(0), operationy->getOutputSocket());

    converter.addPreview(operationy->getOutputSocket());

    /* TODO? */
    /* see gaussian blue node for original usage */
#if 0
    if (!connectedSizeSocket) {
      operationx->setSize(size);
      operationy->setSize(size);
    }
#else
    operationx->setSize(1.0f);
    operationy->setSize(1.0f);
#endif
    operationx->setSubtract(editorNode->custom2 < 0);
    operationy->setSubtract(editorNode->custom2 < 0);

    if (editorNode->storage) {
      NodeDilateErode *data_storage = (NodeDilateErode *)editorNode->storage;
      operationx->setFalloff(data_storage->falloff);
      operationy->setFalloff(data_storage->falloff);
    }
  }
  else {
    if (editorNode->custom2 > 0) {
      DilateStepOperation *operation = new DilateStepOperation();
      operation->setIterations(editorNode->custom2);
      converter.addOperation(operation);

      converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));
      converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket(0));
    }
    else {
      ErodeStepOperation *operation = new ErodeStepOperation();
      operation->setIterations(-editorNode->custom2);
      converter.addOperation(operation);

      converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));
      converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket(0));
    }
  }
}
