/*
 * 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_FilterNode.h"
#include "COM_ConvolutionFilterOperation.h"
#include "COM_ConvolutionEdgeFilterOperation.h"
#include "COM_ExecutionSystem.h"
#include "BKE_node.h"
#include "COM_MixBlendOperation.h"

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

void FilterNode::convertToOperations(ExecutionSystem *graph, CompositorContext *context)
{
	InputSocket *inputSocket = this->getInputSocket(0);
	InputSocket *inputImageSocket = this->getInputSocket(1);
	OutputSocket *outputSocket = this->getOutputSocket(0);
	ConvolutionFilterOperation *operation = NULL;
	
	switch (this->getbNode()->custom1) {
		case CMP_FILT_SOFT:
			operation = new ConvolutionFilterOperation();
			operation->set3x3Filter(1 / 16.0f, 2 / 16.0f, 1 / 16.0f, 2 / 16.0f, 4 / 16.0f, 2 / 16.0f, 1 / 16.0f, 2 / 16.0f, 1 / 16.0f);
			break;
		case CMP_FILT_SHARP:
			operation = new ConvolutionFilterOperation();
			operation->set3x3Filter(-1, -1, -1, -1, 9, -1, -1, -1, -1);
			break;
		case CMP_FILT_LAPLACE:
			operation = new ConvolutionFilterOperation();
			operation->set3x3Filter(-1 / 8.0f, -1 / 8.0f, -1 / 8.0f, -1 / 8.0f, 1.0f, -1 / 8.0f, -1 / 8.0f, -1 / 8.0f, -1 / 8.0f);
			break;
		case CMP_FILT_SOBEL:
			operation = new ConvolutionEdgeFilterOperation();
			operation->set3x3Filter(1, 2, 1, 0, 0, 0, -1, -2, -1);
			break;
		case CMP_FILT_PREWITT:
			operation = new ConvolutionEdgeFilterOperation();
			operation->set3x3Filter(1, 1, 1, 0, 0, 0, -1, -1, -1);
			break;
		case CMP_FILT_KIRSCH:
			operation = new ConvolutionEdgeFilterOperation();
			operation->set3x3Filter(5, 5, 5, -3, -3, -3, -2, -2, -2);
			break;
		case CMP_FILT_SHADOW:
			operation = new ConvolutionFilterOperation();
			operation->set3x3Filter(1, 2, 1, 0, 1, 0, -1, -2, -1);
			break;
		default:
			operation = new ConvolutionFilterOperation();
			operation->set3x3Filter(0, 0, 0, 0, 1, 0, 0, 0, 0);
			break;
	}
	operation->setbNode(this->getbNode());
	inputImageSocket->relinkConnections(operation->getInputSocket(0), 1, graph);
	inputSocket->relinkConnections(operation->getInputSocket(1), 0, graph);
	outputSocket->relinkConnections(operation->getOutputSocket());
	addPreviewOperation(graph, context, operation->getOutputSocket(0));
	
	graph->addOperation(operation);
}
