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: 
   *		Jeroen Bakker 
   *		Monique Dewanchand
   */
  
  #include "COM_ZCombineNode.h"
  
  #include "COM_ZCombineOperation.h"
  
  #include "COM_ExecutionSystem.h"
  #include "COM_SetValueOperation.h"
  #include "COM_MathBaseOperation.h"
  #include "COM_AntiAliasOperation.h"
  #include "COM_MixOperation.h"
  
  #include "DNA_material_types.h" // the ramp types
  
  void ZCombineNode::convertToOperations(NodeConverter &converter, const CompositorContext &context) const
  {
  	if ((context.getRenderData()->scemode & R_FULL_SAMPLE) || this->getbNode()->custom2) {
  		ZCombineOperation *operation = NULL;
  		if (this->getbNode()->custom1) {
  			operation = new ZCombineAlphaOperation();
  		}
  		else {
  			operation = new ZCombineOperation();
  		}
  		converter.addOperation(operation);
  		
  		converter.mapInputSocket(getInputSocket(0), operation->getInputSocket(0));
  		converter.mapInputSocket(getInputSocket(1), operation->getInputSocket(1));
  		converter.mapInputSocket(getInputSocket(2), operation->getInputSocket(2));
  		converter.mapInputSocket(getInputSocket(3), operation->getInputSocket(3));
  		converter.mapOutputSocket(getOutputSocket(0), operation->getOutputSocket());
  		
  		MathMinimumOperation *zoperation = new MathMinimumOperation();
  		converter.addOperation(zoperation);
  		
  		converter.mapInputSocket(getInputSocket(1), zoperation->getInputSocket(0));
  		converter.mapInputSocket(getInputSocket(3), zoperation->getInputSocket(1));
  		converter.mapOutputSocket(getOutputSocket(1), zoperation->getOutputSocket());
  	}
  	else {
  		/* XXX custom1 is "use_alpha", what on earth is this supposed to do here?!? */
  		// not full anti alias, use masking for Z combine. be aware it uses anti aliasing.
  		// step 1 create mask
  		NodeOperation *maskoperation;
  		if (this->getbNode()->custom1) {
  			maskoperation = new MathGreaterThanOperation();
  			converter.addOperation(maskoperation);
  			
  			converter.mapInputSocket(getInputSocket(1), maskoperation->getInputSocket(0));
  			converter.mapInputSocket(getInputSocket(3), maskoperation->getInputSocket(1));
  		}
  		else {
  			maskoperation = new MathLessThanOperation();
  			converter.addOperation(maskoperation);
  			
  			converter.mapInputSocket(getInputSocket(1), maskoperation->getInputSocket(0));
  			converter.mapInputSocket(getInputSocket(3), maskoperation->getInputSocket(1));
  		}
  
  		// step 2 anti alias mask bit of an expensive operation, but does the trick
  		AntiAliasOperation *antialiasoperation = new AntiAliasOperation();
  		converter.addOperation(antialiasoperation);
  		
  		converter.addLink(maskoperation->getOutputSocket(), antialiasoperation->getInputSocket(0));
  
  		// use mask to blend between the input colors.
  		ZCombineMaskOperation *zcombineoperation = this->getbNode()->custom1 ? new ZCombineMaskAlphaOperation() : new ZCombineMaskOperation();
  		converter.addOperation(zcombineoperation);
  		
  		converter.addLink(antialiasoperation->getOutputSocket(), zcombineoperation->getInputSocket(0));
  		converter.mapInputSocket(getInputSocket(0), zcombineoperation->getInputSocket(1));
  		converter.mapInputSocket(getInputSocket(2), zcombineoperation->getInputSocket(2));
  		converter.mapOutputSocket(getOutputSocket(0), zcombineoperation->getOutputSocket());
  
  		MathMinimumOperation *zoperation = new MathMinimumOperation();
  		converter.addOperation(zoperation);
  		
  		converter.mapInputSocket(getInputSocket(1), zoperation->getInputSocket(0));
  		converter.mapInputSocket(getInputSocket(3), zoperation->getInputSocket(1));
  		converter.mapOutputSocket(getOutputSocket(1), zoperation->getOutputSocket());
  	}
  }
  