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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 2012, Blender Foundation.
*/
#include "COM_KeyingDespillOperation.h"
namespace blender::compositor {
KeyingDespillOperation::KeyingDespillOperation()
{
this->add_input_socket(DataType::Color);
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
despill_factor_ = 0.5f;
color_balance_ = 0.5f;
pixel_reader_ = nullptr;
screen_reader_ = nullptr;
flags_.can_be_constant = true;
}
void KeyingDespillOperation::init_execution()
{
pixel_reader_ = this->get_input_socket_reader(0);
screen_reader_ = this->get_input_socket_reader(1);
}
void KeyingDespillOperation::deinit_execution()
{
pixel_reader_ = nullptr;
screen_reader_ = nullptr;
}
void KeyingDespillOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float pixel_color[4];
float screen_color[4];
pixel_reader_->read_sampled(pixel_color, x, y, sampler);
screen_reader_->read_sampled(screen_color, x, y, sampler);
const int screen_primary_channel = max_axis_v3(screen_color);
const int other_1 = (screen_primary_channel + 1) % 3;
const int other_2 = (screen_primary_channel + 2) % 3;
const int min_channel = MIN2(other_1, other_2);
const int max_channel = MAX2(other_1, other_2);
float average_value, amount;
average_value = color_balance_ * pixel_color[min_channel] +
(1.0f - color_balance_) * pixel_color[max_channel];
amount = (pixel_color[screen_primary_channel] - average_value);
copy_v4_v4(output, pixel_color);
const float amount_despill = despill_factor_ * amount;
if (amount_despill > 0.0f) {
output[screen_primary_channel] = pixel_color[screen_primary_channel] - amount_despill;
}
}
void KeyingDespillOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
const float *pixel_color = it.in(0);
const float *screen_color = it.in(1);
const int screen_primary_channel = max_axis_v3(screen_color);
const int other_1 = (screen_primary_channel + 1) % 3;
const int other_2 = (screen_primary_channel + 2) % 3;
const int min_channel = MIN2(other_1, other_2);
const int max_channel = MAX2(other_1, other_2);
const float average_value = color_balance_ * pixel_color[min_channel] +
(1.0f - color_balance_) * pixel_color[max_channel];
const float amount = (pixel_color[screen_primary_channel] - average_value);
copy_v4_v4(it.out, pixel_color);
const float amount_despill = despill_factor_ * amount;
if (amount_despill > 0.0f) {
it.out[screen_primary_channel] = pixel_color[screen_primary_channel] - amount_despill;
}
}
}
} // namespace blender::compositor
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