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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. */
#include "COM_PosterizeOperation.h"
namespace blender::compositor {
PosterizeOperation::PosterizeOperation()
{
this->add_input_socket(DataType::Color);
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Color);
input_program_ = nullptr;
input_steps_program_ = nullptr;
flags_.can_be_constant = true;
}
void PosterizeOperation::init_execution()
{
input_program_ = this->get_input_socket_reader(0);
input_steps_program_ = this->get_input_socket_reader(1);
}
void PosterizeOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input_value[4];
float input_steps[4];
input_program_->read_sampled(input_value, x, y, sampler);
input_steps_program_->read_sampled(input_steps, x, y, sampler);
CLAMP(input_steps[0], 2.0f, 1024.0f);
const float steps_inv = 1.0f / input_steps[0];
output[0] = floor(input_value[0] / steps_inv) * steps_inv;
output[1] = floor(input_value[1] / steps_inv) * steps_inv;
output[2] = floor(input_value[2] / steps_inv) * steps_inv;
output[3] = input_value[3];
}
void PosterizeOperation::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 *in_value = it.in(0);
const float *in_steps = it.in(1);
float steps = in_steps[0];
CLAMP(steps, 2.0f, 1024.0f);
const float steps_inv = 1.0f / steps;
it.out[0] = floor(in_value[0] / steps_inv) * steps_inv;
it.out[1] = floor(in_value[1] / steps_inv) * steps_inv;
it.out[2] = floor(in_value[2] / steps_inv) * steps_inv;
it.out[3] = in_value[3];
}
}
void PosterizeOperation::deinit_execution()
{
input_program_ = nullptr;
input_steps_program_ = nullptr;
}
} // namespace blender::compositor
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