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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_GlareSimpleStarOperation.h"
void GlareSimpleStarOperation::generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings) {
int i, x, y, ym, yp, xm, xp;
float c[4] = {0,0,0,0}, tc[4] = {0,0,0,0};
const float f1 = 1.f - settings->fade, f2 = (1.f - f1)*0.5f;
MemoryBuffer* tbuf1 = inputTile->duplicate();
MemoryBuffer* tbuf2 = inputTile->duplicate();
for (i=0; i<settings->iter; i++) {
// // (x || x-1, y-1) to (x || x+1, y+1)
// // F
for (y=0; y<this->getHeight(); y++) {
ym = y - i;
yp = y + i;
for (x=0; x<this->getWidth(); x++) {
xm = x - i;
xp = x + i;
tbuf1->read(c, x, y);
c[0]*=f1; c[1]*=f1 ; c[2] *=f1;
tbuf1->read(tc, (settings->angle ? xm : x), ym);
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
tbuf1->read(tc, (settings->angle ? xp : x), yp);
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
c[3] = 1.0f;
tbuf1->writePixel(x, y, c);
tbuf2->read(c, x, y);
c[0]*=f1; c[1]*=f1 ; c[2] *=f1;
tbuf2->read(tc, xm, (settings->angle ? yp : y));
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
tbuf2->read(tc, xp, (settings->angle ? ym : y));
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
c[3] = 1.0f;
tbuf2->writePixel(x, y, c);
}
}
// // B
for (y=tbuf1->getHeight()-1; y>=0; y--) {
ym = y - i;
yp = y + i;
for (x=tbuf1->getWidth()-1; x>=0; x--) {
xm = x - i;
xp = x + i;
tbuf1->read(c, x, y);
c[0]*=f1; c[1]*=f1 ; c[2] *=f1;
tbuf1->read(tc, (settings->angle ? xm : x), ym);
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
tbuf1->read(tc, (settings->angle ? xp : x), yp);
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
c[3] = 1.0f;
tbuf1->writePixel(x, y, c);
tbuf2->read(c, x, y);
c[0]*=f1; c[1]*=f1 ; c[2] *=f1;
tbuf2->read(tc, xm, (settings->angle ? yp : y));
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
tbuf2->read(tc, xp, (settings->angle ? ym : y));
c[0]+=tc[0]*f2;
c[1]+=tc[1]*f2;
c[2]+=tc[2]*f2;
c[3] = 1.0f;
tbuf2->writePixel(x, y, c);
}
}
}
for (i = 0 ; i < this->getWidth()*this->getHeight()*4 ; i++) {
data[i] = tbuf1->getBuffer()[i] + tbuf2->getBuffer()[i];
}
delete tbuf1;
delete tbuf2;
}
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