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//##########################################################################
//# #
//# CCFBO #
//# #
//# This program is free software; you can redistribute it and/or modify #
//# it under the terms of the GNU Library General Public License as #
//# published by the Free Software Foundation; version 2 or later of the License. #
//# #
//# 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. #
//# #
//# COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI) #
//# #
//##########################################################################
/***************************************************************/
//
// FILTERBILATERAL
//
// Cross Bilateral Filter - from Tomasi98/Durand02/Eisemann04
//
// created by Christian Boucheny (INRIA/LPPA/EDF R&D) on 12/21/2007
//
// freely updated by Daniel Girardeau-Montaut (EDF R&D) on 03/31/2009
//
/*****************************************************************/
#ifndef CC_BILATERAL_FILTER_HEADER
#define CC_BILATERAL_FILTER_HEADER
//Local
#include "ccGlFilter.h"
#include "ccShader.h"
#include "ccFrameBufferObject.h"
//system
#include <vector>
//! Bilateral filer (shader)
/** See http://en.wikipedia.org/wiki/Bilateral_filter
**/
class ccBilateralFilter : public ccGlFilter
{
public:
//! Default constructor
/** Default parameters:
- halfSpatialSize = 2
- spatialSigma = 2.0
- depthSigma = 0.4
**/
ccBilateralFilter();
//! Destructor
virtual ~ccBilateralFilter();
//! Resets the filter
void reset();
//inherited from ccGlFilter
virtual ccGlFilter* clone() const override;
virtual bool init(unsigned width, unsigned height, QString shadersPath, QString& error) override;
virtual void shade(GLuint texDepth, GLuint texColor, ViewportParameters& parameters) override;
inline virtual GLuint getTexture() override { return m_fbo.getColorTexture(); }
//! Set parameters
/** \param halfSpatialSize half spatial kernel size (between 1 and 7 - total size will be 2*h+1)
\param spatialSigma variance of the 'spatial' distribution (Euclidean distance of pixels)
\param depthSigma variance of the 'depth' distribution (depth difference of pixels)
**/
void setParams( unsigned halfSpatialSize,
float spatialSigma,
float depthSigma );
//! Sets whether to use the current context (OpenGL) viewport or not
void useExistingViewport(bool state);
protected: //methods
void updateDampingTable();
protected: //members
unsigned m_width;
unsigned m_height;
ccFrameBufferObject m_fbo;
ccShader m_shader;
//! Half spatial size (kernel width will be 2*h+1)
unsigned m_halfSpatialSize;
//! Variance of the 'spatial' distribution (Euclidean distance of pixels)
float m_spatialSigma;
//! Variance of the 'depth' distribution (depth difference of pixels)
float m_depthSigma;
//! 'spatial' distribution (kernel values)
std::vector<float> m_dampingPixelDist;
//! Whether to use the current context (OpenGL) viewport or not
bool m_useCurrentViewport;
//! Associated OpenGL functions set
QOpenGLFunctions_2_1 m_glFunc;
//! Associated OpenGL functions set validity
bool m_glFuncIsValid;
};
#endif
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