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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 2021, Blender Foundation.
*/
#include "COM_PosterizeOperation.h"
namespace blender::compositor {
PosterizeOperation::PosterizeOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->m_inputProgram = nullptr;
this->m_inputStepsProgram = nullptr;
flags.can_be_constant = true;
}
void PosterizeOperation::initExecution()
{
this->m_inputProgram = this->getInputSocketReader(0);
this->m_inputStepsProgram = this->getInputSocketReader(1);
}
void PosterizeOperation::executePixelSampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float inputValue[4];
float inputSteps[4];
this->m_inputProgram->readSampled(inputValue, x, y, sampler);
this->m_inputStepsProgram->readSampled(inputSteps, x, y, sampler);
CLAMP(inputSteps[0], 2.0f, 1024.0f);
const float steps_inv = 1.0f / inputSteps[0];
output[0] = floor(inputValue[0] / steps_inv) * steps_inv;
output[1] = floor(inputValue[1] / steps_inv) * steps_inv;
output[2] = floor(inputValue[2] / steps_inv) * steps_inv;
output[3] = inputValue[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::deinitExecution()
{
this->m_inputProgram = nullptr;
this->m_inputStepsProgram = nullptr;
}
} // namespace blender::compositor
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