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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 2020, Blender Foundation.
*/
#include "COM_ColorExposureOperation.h"
namespace blender::compositor {
ExposureOperation::ExposureOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->m_inputProgram = nullptr;
flags.can_be_constant = true;
}
void ExposureOperation::initExecution()
{
this->m_inputProgram = this->getInputSocketReader(0);
this->m_inputExposureProgram = this->getInputSocketReader(1);
}
void ExposureOperation::executePixelSampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float inputValue[4];
float inputExposure[4];
this->m_inputProgram->readSampled(inputValue, x, y, sampler);
this->m_inputExposureProgram->readSampled(inputExposure, x, y, sampler);
const float exposure = pow(2, inputExposure[0]);
output[0] = inputValue[0] * exposure;
output[1] = inputValue[1] * exposure;
output[2] = inputValue[2] * exposure;
output[3] = inputValue[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::deinitExecution()
{
this->m_inputProgram = nullptr;
this->m_inputExposureProgram = nullptr;
}
} // namespace blender::compositor
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