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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.
*/
#include "COM_InvertOperation.h"
namespace blender::compositor {
InvertOperation::InvertOperation()
{
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
input_value_program_ = nullptr;
input_color_program_ = nullptr;
color_ = true;
alpha_ = false;
set_canvas_input_index(1);
this->flags.can_be_constant = true;
}
void InvertOperation::init_execution()
{
input_value_program_ = this->get_input_socket_reader(0);
input_color_program_ = this->get_input_socket_reader(1);
}
void InvertOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input_value[4];
float input_color[4];
input_value_program_->read_sampled(input_value, x, y, sampler);
input_color_program_->read_sampled(input_color, x, y, sampler);
const float value = input_value[0];
const float inverted_value = 1.0f - value;
if (color_) {
output[0] = (1.0f - input_color[0]) * value + input_color[0] * inverted_value;
output[1] = (1.0f - input_color[1]) * value + input_color[1] * inverted_value;
output[2] = (1.0f - input_color[2]) * value + input_color[2] * inverted_value;
}
else {
copy_v3_v3(output, input_color);
}
if (alpha_) {
output[3] = (1.0f - input_color[3]) * value + input_color[3] * inverted_value;
}
else {
output[3] = input_color[3];
}
}
void InvertOperation::deinit_execution()
{
input_value_program_ = nullptr;
input_color_program_ = nullptr;
}
void InvertOperation::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 value = *it.in(0);
const float inverted_value = 1.0f - value;
const float *color = it.in(1);
if (color_) {
it.out[0] = (1.0f - color[0]) * value + color[0] * inverted_value;
it.out[1] = (1.0f - color[1]) * value + color[1] * inverted_value;
it.out[2] = (1.0f - color[2]) * value + color[2] * inverted_value;
}
else {
copy_v3_v3(it.out, color);
}
if (alpha_) {
it.out[3] = (1.0f - color[3]) * value + color[3] * inverted_value;
}
else {
it.out[3] = color[3];
}
}
}
} // namespace blender::compositor
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