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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_CalculateMeanOperation.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
CalculateMeanOperation::CalculateMeanOperation(): NodeOperation() {
this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
this->addOutputSocket(COM_DT_VALUE);
this->imageReader = NULL;
this->iscalculated = false;
this->setting = 1;
this->setComplex(true);
}
void CalculateMeanOperation::initExecution() {
this->imageReader = this->getInputSocketReader(0);
this->iscalculated = false;
NodeOperation::initMutex();
}
void CalculateMeanOperation::executePixel(float* color, int x, int y, MemoryBuffer *inputBuffers[], void * data) {
color[0] = this->result;
}
void CalculateMeanOperation::deinitExecution() {
this->imageReader = NULL;
NodeOperation::deinitMutex();
}
bool CalculateMeanOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
rcti imageInput;
if (iscalculated) {
return false;
}
NodeOperation* operation = getInputOperation(0);
imageInput.xmax = operation->getWidth();
imageInput.xmin = 0;
imageInput.ymax = operation->getHeight();
imageInput.ymin = 0;
if (operation->determineDependingAreaOfInterest(&imageInput, readOperation, output) ) {
return true;
}
return false;
}
void* CalculateMeanOperation::initializeTileData(rcti *rect, MemoryBuffer **memoryBuffers) {
BLI_mutex_lock(getMutex());
if (!this->iscalculated) {
MemoryBuffer* tile = (MemoryBuffer*)imageReader->initializeTileData(rect, memoryBuffers);
calculateMean(tile);
this->iscalculated = true;
}
BLI_mutex_unlock(getMutex());
return NULL;
}
void CalculateMeanOperation::calculateMean(MemoryBuffer * tile) {
this->result = 0.0f;
float* buffer = tile->getBuffer();
int size = tile->getWidth()*tile->getHeight();
int pixels = 0;
float sum;
for (int i = 0, offset = 0 ; i < size ; i ++, offset +=4) {
if (buffer[offset+3] > 0) {
pixels ++;
switch (this->setting)
{
case 1:
{
sum += buffer[offset]*0.35f + buffer[offset+1]*0.45f + buffer[offset+2]*0.2f;
break;
}
case 2:
{
sum+= buffer[offset];
break;
}
case 3:
{
sum+= buffer[offset+1];
break;
}
case 4:
{
sum+= buffer[offset+2];
break;
}
case 5:
{
float yuv[3];
rgb_to_yuv(buffer[offset], buffer[offset+1], buffer[offset+2], &yuv[0], &yuv[1], &yuv[2]);
sum+=yuv[0];
break;
}
}
}
}
this->result = sum / pixels;
}
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