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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*
* Contributor:
* Jeroen Bakker
* Monique Dewanchand
*/
#include "COM_GammaCorrectOperation.h"
#include "BLI_math.h"
GammaCorrectOperation::GammaCorrectOperation() : NodeOperation()
{
this->addInputSocket(COM_DT_COLOR);
this->addOutputSocket(COM_DT_COLOR);
this->m_inputProgram = NULL;
}
void GammaCorrectOperation::initExecution()
{
this->m_inputProgram = this->getInputSocketReader(0);
}
void GammaCorrectOperation::executePixel(float *color, float x, float y, PixelSampler sampler)
{
float inputColor[4];
this->m_inputProgram->read(inputColor, x, y, sampler);
if (inputColor[3] > 0.0f) {
inputColor[0] /= inputColor[3];
inputColor[1] /= inputColor[3];
inputColor[2] /= inputColor[3];
}
/* check for negative to avoid nan's */
color[0] = inputColor[0] > 0.0f ? inputColor[0] * inputColor[0] : 0.0f;
color[1] = inputColor[1] > 0.0f ? inputColor[1] * inputColor[1] : 0.0f;
color[2] = inputColor[2] > 0.0f ? inputColor[2] * inputColor[2] : 0.0f;
inputColor[0] *= inputColor[3];
inputColor[1] *= inputColor[3];
inputColor[2] *= inputColor[3];
color[0] = inputColor[0];
color[1] = inputColor[1];
color[2] = inputColor[2];
color[3] = inputColor[3];
}
void GammaCorrectOperation::deinitExecution()
{
this->m_inputProgram = NULL;
}
GammaUncorrectOperation::GammaUncorrectOperation() : NodeOperation()
{
this->addInputSocket(COM_DT_COLOR);
this->addOutputSocket(COM_DT_COLOR);
this->m_inputProgram = NULL;
}
void GammaUncorrectOperation::initExecution()
{
this->m_inputProgram = this->getInputSocketReader(0);
}
void GammaUncorrectOperation::executePixel(float *color, float x, float y, PixelSampler sampler)
{
float inputColor[4];
this->m_inputProgram->read(inputColor, x, y, sampler);
if (inputColor[3] > 0.0f) {
inputColor[0] /= inputColor[3];
inputColor[1] /= inputColor[3];
inputColor[2] /= inputColor[3];
}
color[0] = inputColor[0] > 0.0f ? sqrtf(inputColor[0]) : 0.0f;
color[1] = inputColor[1] > 0.0f ? sqrtf(inputColor[1]) : 0.0f;
color[2] = inputColor[2] > 0.0f ? sqrtf(inputColor[2]) : 0.0f;
inputColor[0] *= inputColor[3];
inputColor[1] *= inputColor[3];
inputColor[2] *= inputColor[3];
color[0] = inputColor[0];
color[1] = inputColor[1];
color[2] = inputColor[2];
color[3] = inputColor[3];
}
void GammaUncorrectOperation::deinitExecution()
{
this->m_inputProgram = NULL;
}
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