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/*
* Copyright 2012, 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
* Sergey Sharybin
*/
#include "COM_KeyingClipOperation.h"
#include "MEM_guardedalloc.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
KeyingClipOperation::KeyingClipOperation() : NodeOperation()
{
this->addInputSocket(COM_DT_VALUE);
this->addOutputSocket(COM_DT_VALUE);
this->m_kernelRadius = 3;
this->m_kernelTolerance = 0.1f;
this->m_clipBlack = 0.0f;
this->m_clipWhite = 1.0f;
this->m_isEdgeMatte = false;
this->setComplex(true);
}
void *KeyingClipOperation::initializeTileData(rcti *rect)
{
void *buffer = getInputOperation(0)->initializeTileData(rect);
return buffer;
}
void KeyingClipOperation::executePixel(float *color, int x, int y, void *data)
{
const int delta = this->m_kernelRadius;
const float tolerance = this->m_kernelTolerance;
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
float *buffer = inputBuffer->getBuffer();
int bufferWidth = inputBuffer->getWidth();
int bufferHeight = inputBuffer->getHeight();
int i, j, count = 0, totalCount = 0;
float value = buffer[(y * bufferWidth + x) * 4];
bool ok = false;
for (i = -delta + 1; i < delta; i++) {
for (j = -delta + 1; j < delta; j++) {
int cx = x + j, cy = y + i;
if (i == 0 && j == 0)
continue;
if (cx >= 0 && cx < bufferWidth && cy >= 0 && cy < bufferHeight) {
int bufferIndex = (cy * bufferWidth + cx) * 4;
float currentValue = buffer[bufferIndex];
if (fabsf(currentValue - value) < tolerance) {
count++;
}
totalCount++;
}
}
}
ok = count >= (float) totalCount * 0.9f;
if (this->m_isEdgeMatte) {
if (ok)
color[0] = 0.0f;
else
color[0] = 1.0f;
}
else {
color[0] = value;
if (ok) {
if (color[0] < this->m_clipBlack)
color[0] = 0.0f;
else if (color[0] >= this->m_clipWhite)
color[0] = 1.0f;
else
color[0] = (color[0] - this->m_clipBlack) / (this->m_clipWhite - this->m_clipBlack);
}
}
}
bool KeyingClipOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output)
{
rcti newInput;
newInput.xmin = input->xmin - this->m_kernelRadius;
newInput.ymin = input->ymin - this->m_kernelRadius;
newInput.xmax = input->xmax + this->m_kernelRadius;
newInput.ymax = input->ymax + this->m_kernelRadius;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
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