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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. */
#include "COM_ColorExposureOperation.h"
namespace blender::compositor {
ExposureOperation::ExposureOperation()
{
this->add_input_socket(DataType::Color);
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Color);
input_program_ = nullptr;
flags_.can_be_constant = true;
}
void ExposureOperation::init_execution()
{
input_program_ = this->get_input_socket_reader(0);
input_exposure_program_ = this->get_input_socket_reader(1);
}
void ExposureOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input_value[4];
float input_exposure[4];
input_program_->read_sampled(input_value, x, y, sampler);
input_exposure_program_->read_sampled(input_exposure, x, y, sampler);
const float exposure = pow(2, input_exposure[0]);
output[0] = input_value[0] * exposure;
output[1] = input_value[1] * exposure;
output[2] = input_value[2] * exposure;
output[3] = input_value[3];
}
void ExposureOperation::update_memory_buffer_row(PixelCursor &p)
{
for (; p.out < p.row_end; p.next()) {
const float *in_value = p.ins[0];
const float *in_exposure = p.ins[1];
const float exposure = pow(2, in_exposure[0]);
p.out[0] = in_value[0] * exposure;
p.out[1] = in_value[1] * exposure;
p.out[2] = in_value[2] * exposure;
p.out[3] = in_value[3];
}
}
void ExposureOperation::deinit_execution()
{
input_program_ = nullptr;
input_exposure_program_ = nullptr;
}
} // namespace blender::compositor
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