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/*
* Copyright 2011, Glareer 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_MixGlareOperation.h"
MixGlareOperation::MixGlareOperation() : MixBaseOperation()
{
/* pass */
}
void MixGlareOperation::executePixel(float output[4], float x, float y, PixelSampler sampler)
{
float inputColor1[4];
float inputColor2[4];
float inputValue[4];
float value;
this->m_inputValueOperation->read(inputValue, x, y, sampler);
this->m_inputColor1Operation->read(inputColor1, x, y, sampler);
this->m_inputColor2Operation->read(inputColor2, x, y, sampler);
value = inputValue[0];
float mf = 2.f - 2.f * fabsf(value - 0.5f);
if (inputColor1[0] < 0.0f) inputColor1[0] = 0.0f;
if (inputColor1[1] < 0.0f) inputColor1[1] = 0.0f;
if (inputColor1[2] < 0.0f) inputColor1[2] = 0.0f;
output[0] = mf * max(inputColor1[0] + value * (inputColor2[0] - inputColor1[0]), 0.0f);
output[1] = mf * max(inputColor1[1] + value * (inputColor2[1] - inputColor1[1]), 0.0f);
output[2] = mf * max(inputColor1[2] + value * (inputColor2[2] - inputColor1[2]), 0.0f);
output[3] = inputColor1[3];
clampIfNeeded(output);
}
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