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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include "COM_GammaCorrectOperation.h"
namespace blender::compositor {
GammaCorrectOperation::GammaCorrectOperation()
{
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
input_program_ = nullptr;
flags_.can_be_constant = true;
}
void GammaCorrectOperation::init_execution()
{
input_program_ = this->get_input_socket_reader(0);
}
void GammaCorrectOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input_color[4];
input_program_->read_sampled(input_color, x, y, sampler);
if (input_color[3] > 0.0f) {
input_color[0] /= input_color[3];
input_color[1] /= input_color[3];
input_color[2] /= input_color[3];
}
/* check for negative to avoid nan's */
output[0] = input_color[0] > 0.0f ? input_color[0] * input_color[0] : 0.0f;
output[1] = input_color[1] > 0.0f ? input_color[1] * input_color[1] : 0.0f;
output[2] = input_color[2] > 0.0f ? input_color[2] * input_color[2] : 0.0f;
output[3] = input_color[3];
if (input_color[3] > 0.0f) {
output[0] *= input_color[3];
output[1] *= input_color[3];
output[2] *= input_color[3];
}
}
void GammaCorrectOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input = inputs[0];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
float color[4];
input->read_elem(it.x, it.y, color);
if (color[3] > 0.0f) {
color[0] /= color[3];
color[1] /= color[3];
color[2] /= color[3];
}
/* Check for negative to avoid nan's. */
it.out[0] = color[0] > 0.0f ? color[0] * color[0] : 0.0f;
it.out[1] = color[1] > 0.0f ? color[1] * color[1] : 0.0f;
it.out[2] = color[2] > 0.0f ? color[2] * color[2] : 0.0f;
it.out[3] = color[3];
if (color[3] > 0.0f) {
it.out[0] *= color[3];
it.out[1] *= color[3];
it.out[2] *= color[3];
}
}
}
void GammaCorrectOperation::deinit_execution()
{
input_program_ = nullptr;
}
GammaUncorrectOperation::GammaUncorrectOperation()
{
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
input_program_ = nullptr;
flags_.can_be_constant = true;
}
void GammaUncorrectOperation::init_execution()
{
input_program_ = this->get_input_socket_reader(0);
}
void GammaUncorrectOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input_color[4];
input_program_->read_sampled(input_color, x, y, sampler);
if (input_color[3] > 0.0f) {
input_color[0] /= input_color[3];
input_color[1] /= input_color[3];
input_color[2] /= input_color[3];
}
output[0] = input_color[0] > 0.0f ? sqrtf(input_color[0]) : 0.0f;
output[1] = input_color[1] > 0.0f ? sqrtf(input_color[1]) : 0.0f;
output[2] = input_color[2] > 0.0f ? sqrtf(input_color[2]) : 0.0f;
output[3] = input_color[3];
if (input_color[3] > 0.0f) {
output[0] *= input_color[3];
output[1] *= input_color[3];
output[2] *= input_color[3];
}
}
void GammaUncorrectOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input = inputs[0];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
float color[4];
input->read_elem(it.x, it.y, color);
if (color[3] > 0.0f) {
color[0] /= color[3];
color[1] /= color[3];
color[2] /= color[3];
}
it.out[0] = color[0] > 0.0f ? sqrtf(color[0]) : 0.0f;
it.out[1] = color[1] > 0.0f ? sqrtf(color[1]) : 0.0f;
it.out[2] = color[2] > 0.0f ? sqrtf(color[2]) : 0.0f;
it.out[3] = color[3];
if (color[3] > 0.0f) {
it.out[0] *= color[3];
it.out[1] *= color[3];
it.out[2] *= color[3];
}
}
}
void GammaUncorrectOperation::deinit_execution()
{
input_program_ = nullptr;
}
} // namespace blender::compositor
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