text: /*
   * Copyright 2011, 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:
   *		Dalai Felinto
   */
  
  #ifndef _COM_DistanceRGBMatteOperation_h
  #define _COM_DistanceRGBMatteOperation_h
  #include "COM_MixOperation.h"
  
  
  /**
   * this program converts an input color to an output value.
   * it assumes we are in sRGB color space.
   */
  class DistanceRGBMatteOperation : public NodeOperation {
  protected:
  	NodeChroma *m_settings;
  	SocketReader *m_inputImageProgram;
  	SocketReader *m_inputKeyProgram;
  
  	virtual float calculateDistance(float key[4], float image[4]);
  
  public:
  	/**
  	 * Default constructor
  	 */
  	DistanceRGBMatteOperation();
  	
  	/**
  	 * the inner loop of this program
  	 */
  	void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
  	
  	void initExecution();
  	void deinitExecution();
  	
  	void setSettings(NodeChroma *nodeChroma) { this->m_settings = nodeChroma; }
  };
  #endif
  