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/* SPDX-License-Identifier: GPL-2.0-or-later
* 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 input_program
*/
SocketReader *input_program_;
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 execute_pixel(float output[4], int x, int y, void *data) override;
/**
* Initialize the execution
*/
void init_execution() override;
void *initialize_tile_data(rcti *rect) override;
/**
* Deinitialize the execution
*/
void deinit_execution() override;
void set_fit(bool fit)
{
fit_ = fit;
}
void set_jitter(bool jitter)
{
jitter_ = jitter;
}
/** Set constant distortion value */
void set_distortion(float distortion);
/** Set constant dispersion value */
void set_dispersion(float dispersion);
bool determine_depending_area_of_interest(rcti *input,
ReadBufferOperation *read_operation,
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 update_variables(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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