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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 output[4], 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();
float value = buffer[(y * bufferWidth + x)];
bool ok = false;
int start_x = max_ff(0, x - delta + 1),
start_y = max_ff(0, y - delta + 1),
end_x = min_ff(x + delta - 1, bufferWidth - 1),
end_y = min_ff(y + delta - 1, bufferHeight - 1);
int count = 0, totalCount = (end_x - start_x + 1) * (end_y - start_y + 1) - 1;
int thresholdCount = ceil((float) totalCount * 0.9f);
if (delta == 0) {
ok = true;
}
for (int cx = start_x; ok == false && cx <= end_x; ++cx) {
for (int cy = start_y; ok == false && cy <= end_y; ++cy) {
if (UNLIKELY(cx == x && cy == y)) {
continue;
}
int bufferIndex = (cy * bufferWidth + cx);
float currentValue = buffer[bufferIndex];
if (fabsf(currentValue - value) < tolerance) {
count++;
if (count >= thresholdCount) {
ok = true;
}
}
}
}
if (this->m_isEdgeMatte) {
if (ok)
output[0] = 0.0f;
else
output[0] = 1.0f;
}
else {
output[0] = value;
if (ok) {
if (output[0] < this->m_clipBlack)
output[0] = 0.0f;
else if (output[0] >= this->m_clipWhite)
output[0] = 1.0f;
else
output[0] = (output[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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