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/*
* Copyright 2011, Blender Foundation.
*
* This Reader 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 Reader 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 Reader; 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_ColorSpillOperation.h"
#include "BLI_math.h"
#define avg(a,b) ((a+b)/2)
ColorSpillOperation::ColorSpillOperation(): NodeOperation() {
addInputSocket(COM_DT_COLOR);
addInputSocket(COM_DT_VALUE);
addOutputSocket(COM_DT_COLOR);
inputImageReader = NULL;
inputFacReader = NULL;
this->spillChannel = 1; // GREEN
}
void ColorSpillOperation::initExecution() {
this->inputImageReader = this->getInputSocketReader(0);
this->inputFacReader = this->getInputSocketReader(1);
if (spillChannel == 0) {
rmut = -1.0f;
gmut = 1.0f;
bmut = 1.0f;
this->channel2 = 1;
this->channel3 = 2;
if (settings->unspill == 0) {
settings->uspillr = 1.0f;
settings->uspillg = 0.0f;
settings->uspillb = 0.0f;
}
}
else if (spillChannel == 1) {
rmut = 1.0f;
gmut = -1.0f;
bmut = 1.0f;
this->channel2 = 0;
this->channel3 = 2;
if (settings->unspill == 0) {
settings->uspillr = 0.0f;
settings->uspillg = 1.0f;
settings->uspillb = 0.0f;
}
}
else {
rmut = 1.0f;
gmut = 1.0f;
bmut = -1.0f;
this->channel2 = 0;
this->channel3 = 1;
if (settings->unspill == 0) {
settings->uspillr = 0.0f;
settings->uspillg = 0.0f;
settings->uspillb = 1.0f;
}
}
}
void ColorSpillOperation::deinitExecution() {
this->inputImageReader= NULL;
this->inputFacReader = NULL;
}
void ColorSpillOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
float fac[4];
float input[4];
float map;
this->inputFacReader->read(fac, x, y, sampler, inputBuffers);
this->inputImageReader->read(input, x, y, sampler, inputBuffers);
float rfac = min(1.0f, fac[0]);
map = calculateMapValue(rfac, input);
if (map>0) {
outputValue[0]=input[0]+rmut*(settings->uspillr*map);
outputValue[1]=input[1]+gmut*(settings->uspillg*map);
outputValue[2]=input[2]+bmut*(settings->uspillb*map);
outputValue[3]=input[3];
}
else {
outputValue[0]=input[0];
outputValue[1]=input[1];
outputValue[2]=input[2];
outputValue[3]=input[3];
}
}
float ColorSpillOperation::calculateMapValue(float fac, float *input) {
return fac * (input[this->spillChannel]-(this->settings->limscale*input[settings->limchan]));
}
float ColorSpillAverageOperation::calculateMapValue(float fac, float *input) {
return fac * (input[this->spillChannel]-(this->settings->limscale*avg(input[this->channel2], input[this->channel3])));
}
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