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blender-archive/source/blender/compositor/operations/COM_GlareSimpleStarOperation.cpp
Bastien Montagne 9dd194716b Fix T50736: Zero streaks in Glare node.
Please never, ever use same DNA var for two different things. Even worse
if they do not have same type and ranges!

This is only ensuring issues (as described in report, but also if
animating both RNA props using same DNA var... yuck).

And we were not even saving any byte in DNA, could reuse some padding
there to store the two new needed vars (yes, two, since we cannot re-use
existing one if we want to keep backward *and* forward compatibility).
2017-02-23 10:39:51 +01:00

105 lines
3.0 KiB
C++

/*
* 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 = 1.0f - settings->fade;
const float f2 = (1.0f - f1) * 0.5f;
MemoryBuffer *tbuf1 = inputTile->duplicate();
MemoryBuffer *tbuf2 = inputTile->duplicate();
bool breaked = false;
for (i = 0; i < settings->iter && (!breaked); i++) {
// // (x || x-1, y-1) to (x || x+1, y+1)
// // F
for (y = 0; y < this->getHeight() && (!breaked); 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);
mul_v3_fl(c, f1);
tbuf1->read(tc, (settings->star_45 ? xm : x), ym);
madd_v3_v3fl(c, tc, f2);
tbuf1->read(tc, (settings->star_45 ? xp : x), yp);
madd_v3_v3fl(c, tc, f2);
c[3] = 1.0f;
tbuf1->writePixel(x, y, c);
tbuf2->read(c, x, y);
mul_v3_fl(c, f1);
tbuf2->read(tc, xm, (settings->star_45 ? yp : y));
madd_v3_v3fl(c, tc, f2);
tbuf2->read(tc, xp, (settings->star_45 ? ym : y));
madd_v3_v3fl(c, tc, f2);
c[3] = 1.0f;
tbuf2->writePixel(x, y, c);
}
if (isBreaked()) {
breaked = true;
}
}
// // B
for (y = tbuf1->getHeight() - 1 && (!breaked); 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);
mul_v3_fl(c, f1);
tbuf1->read(tc, (settings->star_45 ? xm : x), ym);
madd_v3_v3fl(c, tc, f2);
tbuf1->read(tc, (settings->star_45 ? xp : x), yp);
madd_v3_v3fl(c, tc, f2);
c[3] = 1.0f;
tbuf1->writePixel(x, y, c);
tbuf2->read(c, x, y);
mul_v3_fl(c, f1);
tbuf2->read(tc, xm, (settings->star_45 ? yp : y));
madd_v3_v3fl(c, tc, f2);
tbuf2->read(tc, xp, (settings->star_45 ? ym : y));
madd_v3_v3fl(c, tc, f2);
c[3] = 1.0f;
tbuf2->writePixel(x, y, c);
}
if (isBreaked()) {
breaked = true;
}
}
}
for (i = 0; i < this->getWidth() * this->getHeight() * 4; i++) {
data[i] = tbuf1->getBuffer()[i] + tbuf2->getBuffer()[i];
}
delete tbuf1;
delete tbuf2;
}