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/*
* 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
*/
#ifndef __COM_SCREENLENSDISTORTIONOPERATION_H__
#define __COM_SCREENLENSDISTORTIONOPERATION_H__
#include "COM_NodeOperation.h"
#include "DNA_node_types.h"
class ScreenLensDistortionOperation : public NodeOperation {
private:
/**
* Cached reference to the inputProgram
*/
SocketReader *m_inputProgram;
bool m_fit;
bool m_jitter;
float m_dispersion;
float m_distortion;
bool m_dispersion_const;
bool m_distortion_const;
bool m_variables_ready;
float m_k[3];
float m_k4[3];
float m_dk4[3];
float m_maxk;
float m_sc, m_cx, m_cy;
public:
ScreenLensDistortionOperation();
/**
* the inner loop of this program
*/
void executePixel(float output[4], int x, int y, void *data);
/**
* Initialize the execution
*/
void initExecution();
void *initializeTileData(rcti *rect);
/**
* Deinitialize the execution
*/
void deinitExecution();
void setFit(bool fit) { m_fit = fit; }
void setJitter(bool jitter) { m_jitter = jitter; }
/** Set constant distortion value */
void setDistortion(float distortion);
/** Set constant dispersion value */
void setDispersion(float dispersion);
bool determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output);
private:
void determineUV(float result[6], float x, float y) const;
void updateVariables(float distortion, float dispersion);
void get_uv(const float xy[2], float uv[2]) const;
void distort_uv(const float uv[2], float t, float xy[2]) const;
bool get_delta(float r_sq, float k4, const float uv[2], float delta[2]) const;
void accumulate(MemoryBuffer *buffer, int a, int b,
float r_sq, const float uv[2], const float delta[3][2],
float sum[4], int count[3]) const;
};
#endif
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