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/*
* 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.
*
* Copyright 2011, Blender Foundation.
*/
#pragma once
#include "COM_MultiThreadedOperation.h"
#include "DNA_node_types.h"
struct RNG;
namespace blender::compositor {
class ScreenLensDistortionOperation : public MultiThreadedOperation {
private:
/**
* Cached reference to the inputProgram
*/
SocketReader *inputProgram_;
struct RNG *rng_;
bool fit_;
bool jitter_;
float dispersion_;
float distortion_;
bool dispersion_const_;
bool distortion_const_;
bool variables_ready_;
float k_[3];
float k4_[3];
float dk4_[3];
float maxk_;
float sc_, cx_, cy_;
public:
ScreenLensDistortionOperation();
void init_data() override;
/**
* The inner loop of this operation.
*/
void executePixel(float output[4], int x, int y, void *data) override;
/**
* Initialize the execution
*/
void initExecution() override;
void *initializeTileData(rcti *rect) override;
/**
* Deinitialize the execution
*/
void deinitExecution() override;
void setFit(bool fit)
{
fit_ = fit;
}
void setJitter(bool jitter)
{
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) override;
void determine_canvas(const rcti &preferred_area, rcti &r_area) override;
void get_area_of_interest(int input_idx, const rcti &output_area, rcti &r_input_area) override;
void update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs) override;
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(const 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;
};
} // namespace blender::compositor
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