COM_SMAAOperation.h

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/*
 * Copyright 2017, Blender Foundation.
 *
 * 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.
 *
 * Contributor: IRIE Shinsuke
 */
 
#pragma once
 
#include "COM_NodeOperation.h"
 
namespace blender::compositor {
 
/*-----------------------------------------------------------------------------*/
/* Edge Detection (First Pass) */
 
class SMAAEdgeDetectionOperation : public NodeOperation {
 protected:
  SocketReader *m_imageReader;
  SocketReader *m_valueReader;
 
  float m_threshold;
  float m_contrast_limit;
 
 public:
  SMAAEdgeDetectionOperation();
 
  virtual void executePixel(float output[4], int x, int y, void *data) override;
 
  void initExecution() override;
 
  void deinitExecution() override;
 
  void setThreshold(float threshold);
 
  void setLocalContrastAdaptationFactor(float factor);
 
  bool determineDependingAreaOfInterest(rcti *input,
                                        ReadBufferOperation *readOperation,
                                        rcti *output) override;
};
 
/*-----------------------------------------------------------------------------*/
/*  Blending Weight Calculation (Second Pass) */
 
class SMAABlendingWeightCalculationOperation : public NodeOperation {
 private:
  SocketReader *m_imageReader;
 
  int m_corner_rounding;
 
 public:
  SMAABlendingWeightCalculationOperation();
 
  void executePixel(float output[4], int x, int y, void *data) override;
 
  void initExecution() override;
  void *initializeTileData(rcti *rect) override;
 
  void deinitExecution() override;
 
  void setCornerRounding(float rounding);
 
  bool determineDependingAreaOfInterest(rcti *input,
                                        ReadBufferOperation *readOperation,
                                        rcti *output) override;
 
 private:
  /* Diagonal Search Functions */
  int searchDiag1(int x, int y, int dir, bool *found);
  int searchDiag2(int x, int y, int dir, bool *found);
  void calculateDiagWeights(int x, int y, const float edges[2], float weights[2]);
  bool isVerticalSearchUnneeded(int x, int y);
 
  /* Horizontal/Vertical Search Functions */
  int searchXLeft(int x, int y);
  int searchXRight(int x, int y);
  int searchYUp(int x, int y);
  int searchYDown(int x, int y);
 
  /*  Corner Detection Functions */
  void detectHorizontalCornerPattern(float weights[2], int left, int right, int y, int d1, int d2);
  void detectVerticalCornerPattern(float weights[2], int x, int top, int bottom, int d1, int d2);
};
 
/*-----------------------------------------------------------------------------*/
/* Neighborhood Blending (Third Pass) */
 
class SMAANeighborhoodBlendingOperation : public NodeOperation {
 private:
  SocketReader *m_image1Reader;
  SocketReader *m_image2Reader;
 
 public:
  SMAANeighborhoodBlendingOperation();
 
  void executePixel(float output[4], int x, int y, void *data) override;
 
  void initExecution() override;
  void *initializeTileData(rcti *rect) override;
 
  void deinitExecution() override;
 
  bool determineDependingAreaOfInterest(rcti *input,
                                        ReadBufferOperation *readOperation,
                                        rcti *output) override;
};
 
}  // namespace blender::compositor