d10ea97053
The posterize node limits the number of colors per channel.
This is useful to generate masks or to generate stylized images
Both the tiled and full-frame implementation are included in this patch
{F10314012}
Reviewed By: manzanilla, jbakker
Differential Revision: https://developer.blender.org/D12304
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright 2021, Blender Foundation.
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*/
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#include "COM_PosterizeOperation.h"
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namespace blender::compositor {
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PosterizeOperation::PosterizeOperation()
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{
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this->addInputSocket(DataType::Color);
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this->addInputSocket(DataType::Value);
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this->addOutputSocket(DataType::Color);
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this->m_inputProgram = nullptr;
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this->m_inputStepsProgram = nullptr;
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flags.can_be_constant = true;
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}
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void PosterizeOperation::initExecution()
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{
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this->m_inputProgram = this->getInputSocketReader(0);
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this->m_inputStepsProgram = this->getInputSocketReader(1);
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}
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void PosterizeOperation::executePixelSampled(float output[4],
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float x,
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float y,
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PixelSampler sampler)
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{
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float inputValue[4];
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float inputSteps[4];
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this->m_inputProgram->readSampled(inputValue, x, y, sampler);
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this->m_inputStepsProgram->readSampled(inputSteps, x, y, sampler);
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CLAMP(inputSteps[0], 2.0f, 1024.0f);
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const float steps_inv = 1.0f / inputSteps[0];
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output[0] = floor(inputValue[0] / steps_inv) * steps_inv;
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output[1] = floor(inputValue[1] / steps_inv) * steps_inv;
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output[2] = floor(inputValue[2] / steps_inv) * steps_inv;
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output[3] = inputValue[3];
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}
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void PosterizeOperation::update_memory_buffer_partial(MemoryBuffer *output,
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const rcti &area,
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Span<MemoryBuffer *> inputs)
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{
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for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
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const float *in_value = it.in(0);
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const float *in_steps = it.in(1);
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float steps = in_steps[0];
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CLAMP(steps, 2.0f, 1024.0f);
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const float steps_inv = 1.0f / steps;
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it.out[0] = floor(in_value[0] / steps_inv) * steps_inv;
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it.out[1] = floor(in_value[1] / steps_inv) * steps_inv;
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it.out[2] = floor(in_value[2] / steps_inv) * steps_inv;
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it.out[3] = in_value[3];
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}
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}
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void PosterizeOperation::deinitExecution()
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{
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this->m_inputProgram = nullptr;
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this->m_inputStepsProgram = nullptr;
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}
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} // namespace blender::compositor
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