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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_RenderLayersAlphaProg.h"
RenderLayersAlphaProg::RenderLayersAlphaProg() : RenderLayersBaseProg(SCE_PASS_COMBINED, 4)
{
this->addOutputSocket(COM_DT_VALUE);
}
void RenderLayersAlphaProg::executePixel(float output[4], float x, float y, PixelSampler sampler)
{
int ix = x;
int iy = y;
float *inputBuffer = this->getInputBuffer();
if (inputBuffer == NULL || ix < 0 || iy < 0 || ix >= (int)this->getWidth() || iy >= (int)this->getHeight() ) {
output[0] = 0.0f;
output[1] = 0.0f;
output[2] = 0.0f;
output[3] = 0.0f;
}
else {
unsigned int offset = (iy * this->getWidth() + ix) * 4;
output[0] = inputBuffer[offset + 3];
output[1] = 0.0f;
output[2] = 0.0f;
output[3] = 0.0f;
}
}
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