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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include "COM_BokehImageOperation.h"
namespace blender::compositor {
BokehImageOperation::BokehImageOperation()
{
this->add_output_socket(DataType::Color);
delete_data_ = false;
}
void BokehImageOperation::init_execution()
{
center_[0] = get_width() / 2;
center_[1] = get_height() / 2;
inverse_rounding_ = 1.0f - data_->rounding;
circular_distance_ = get_width() / 2;
flap_rad_ = (float)(M_PI * 2) / data_->flaps;
flap_rad_add_ = data_->angle;
while (flap_rad_add_ < 0.0f) {
flap_rad_add_ += (float)(M_PI * 2.0);
}
while (flap_rad_add_ > (float)M_PI) {
flap_rad_add_ -= (float)(M_PI * 2.0);
}
}
void BokehImageOperation::detemine_start_point_of_flap(float r[2], int flap_number, float distance)
{
r[0] = sinf(flap_rad_ * flap_number + flap_rad_add_) * distance + center_[0];
r[1] = cosf(flap_rad_ * flap_number + flap_rad_add_) * distance + center_[1];
}
float BokehImageOperation::is_inside_bokeh(float distance, float x, float y)
{
float inside_bokeh = 0.0f;
const float deltaX = x - center_[0];
const float deltaY = y - center_[1];
float closest_point[2];
float line_p1[2];
float line_p2[2];
float point[2];
point[0] = x;
point[1] = y;
const float distance_to_center = len_v2v2(point, center_);
const float bearing = (atan2f(deltaX, deltaY) + (float)(M_PI * 2.0));
int flap_number = (int)((bearing - flap_rad_add_) / flap_rad_);
detemine_start_point_of_flap(line_p1, flap_number, distance);
detemine_start_point_of_flap(line_p2, flap_number + 1, distance);
closest_to_line_v2(closest_point, point, line_p1, line_p2);
const float distance_line_to_center = len_v2v2(center_, closest_point);
const float distance_rounding_to_center = inverse_rounding_ * distance_line_to_center +
data_->rounding * distance;
const float catadioptric_distance_to_center = distance_rounding_to_center * data_->catadioptric;
if (distance_rounding_to_center >= distance_to_center &&
catadioptric_distance_to_center <= distance_to_center) {
if (distance_rounding_to_center - distance_to_center < 1.0f) {
inside_bokeh = (distance_rounding_to_center - distance_to_center);
}
else if (data_->catadioptric != 0.0f &&
distance_to_center - catadioptric_distance_to_center < 1.0f) {
inside_bokeh = (distance_to_center - catadioptric_distance_to_center);
}
else {
inside_bokeh = 1.0f;
}
}
return inside_bokeh;
}
void BokehImageOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler /*sampler*/)
{
float shift = data_->lensshift;
float shift2 = shift / 2.0f;
float distance = circular_distance_;
float inside_bokeh_max = is_inside_bokeh(distance, x, y);
float inside_bokeh_med = is_inside_bokeh(distance - fabsf(shift2 * distance), x, y);
float inside_bokeh_min = is_inside_bokeh(distance - fabsf(shift * distance), x, y);
if (shift < 0) {
output[0] = inside_bokeh_max;
output[1] = inside_bokeh_med;
output[2] = inside_bokeh_min;
}
else {
output[0] = inside_bokeh_min;
output[1] = inside_bokeh_med;
output[2] = inside_bokeh_max;
}
output[3] = (inside_bokeh_max + inside_bokeh_med + inside_bokeh_min) / 3.0f;
}
void BokehImageOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> UNUSED(inputs))
{
const float shift = data_->lensshift;
const float shift2 = shift / 2.0f;
const float distance = circular_distance_;
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
const float inside_bokeh_max = is_inside_bokeh(distance, it.x, it.y);
const float inside_bokeh_med = is_inside_bokeh(
distance - fabsf(shift2 * distance), it.x, it.y);
const float inside_bokeh_min = is_inside_bokeh(distance - fabsf(shift * distance), it.x, it.y);
if (shift < 0) {
it.out[0] = inside_bokeh_max;
it.out[1] = inside_bokeh_med;
it.out[2] = inside_bokeh_min;
}
else {
it.out[0] = inside_bokeh_min;
it.out[1] = inside_bokeh_med;
it.out[2] = inside_bokeh_max;
}
it.out[3] = (inside_bokeh_max + inside_bokeh_med + inside_bokeh_min) / 3.0f;
}
}
void BokehImageOperation::deinit_execution()
{
if (delete_data_) {
if (data_) {
delete data_;
data_ = nullptr;
}
}
}
void BokehImageOperation::determine_canvas(const rcti &preferred_area, rcti &r_area)
{
BLI_rcti_init(&r_area,
preferred_area.xmin,
preferred_area.xmin + COM_BLUR_BOKEH_PIXELS,
preferred_area.ymin,
preferred_area.ymin + COM_BLUR_BOKEH_PIXELS);
}
} // namespace blender::compositor
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