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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_DirectionalBlurOperation.h"
#include "BLI_math.h"
extern "C" {
#include "RE_pipeline.h"
}
DirectionalBlurOperation::DirectionalBlurOperation() : NodeOperation() {
this->addInputSocket(COM_DT_COLOR);
this->addOutputSocket(COM_DT_COLOR);
this->setComplex(true);
this->inputProgram = NULL;
}
void DirectionalBlurOperation::initExecution() {
this->inputProgram = getInputSocketReader(0);
QualityStepHelper::initExecution(COM_QH_INCREASE);
const float angle = this->data->angle;
const float zoom = this->data->zoom;
const float spin = this->data->spin;
const float iterations = this->data->iter;
const float distance = this->data->distance;
const float center_x = this->data->center_x;
const float center_y = this->data->center_y;
const float width = getWidth();
const float height = getHeight();
const float a= angle;
const float itsc= 1.f / pow(2.f, (float)iterations);
float D;
D= distance * sqrtf(width*width + height*height);
center_x_pix= center_x * width;
center_y_pix= center_y * height;
tx= itsc * D * cos(a);
ty= -itsc * D * sin(a);
sc= itsc * zoom;
rot= itsc * spin;
}
void DirectionalBlurOperation::executePixel(float* color, int x, int y, MemoryBuffer *inputBuffers[], void* data) {
const int iterations = pow(2.f, this->data->iter);
float col[4]= {0,0,0,0};
float col2[4]= {0,0,0,0};
this->inputProgram->read(col2, x, y, COM_PS_NEAREST, inputBuffers);
float ltx = tx;
float lty = ty;
float lsc = sc;
float lrot = rot;
/* blur the image */
for (int i= 0; i < iterations; ++i) {
const float cs= cos(lrot), ss= sin(lrot);
const float isc= 1.f / (1.f + lsc);
const float v= isc * (y - center_y_pix) + lty;
const float u= isc * (x - center_x_pix) + ltx;
this->inputProgram->read(col, cs * u + ss * v + center_x_pix, cs * v - ss * u + center_y_pix, COM_PS_NEAREST, inputBuffers);
col2[0] += col[0];
col2[1] += col[1];
col2[2] += col[2];
col2[3] += col[3];
/* double transformations */
ltx += tx;
lty += ty;
lrot += rot;
lsc += sc;
}
color[0] = col2[0]/iterations;
color[1] = col2[1]/iterations;
color[2] = col2[2]/iterations;
color[3] = col2[3]/iterations;
}
void DirectionalBlurOperation::deinitExecution() {
this->inputProgram = NULL;
}
bool DirectionalBlurOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
rcti newInput;
newInput.xmax = this->getWidth();
newInput.xmin = 0;
newInput.ymax = this->getHeight();
newInput.ymin = 0;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
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