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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:
* Dalai Felinto
*/
#ifndef _COM_DisplaceOperation_h
#define _COM_DisplaceOperation_h
#include "COM_NodeOperation.h"
class DisplaceOperation : public NodeOperation {
private:
/**
* Cached reference to the inputProgram
*/
SocketReader *m_inputColorProgram;
SocketReader *m_inputVectorProgram;
SocketReader *m_inputScaleXProgram;
SocketReader *m_inputScaleYProgram;
float m_width_x4;
float m_height_x4;
public:
DisplaceOperation();
/**
* we need a 2x2 differential filter for Vector Input and full buffer for the image
*/
bool determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output);
/**
* the inner loop of this program
*/
void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
void pixelTransform(const float xy[2], float r_uv[2], float r_deriv[2][2]);
/**
* Initialize the execution
*/
void initExecution();
/**
* Deinitialize the execution
*/
void deinitExecution();
private:
bool read_displacement(float x, float y, float xscale, float yscale, const float origin[2], float &r_u, float &r_v);
};
#endif
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