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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_GlareGhostOperation.h"
#include "BLI_math.h"
#include "COM_FastGaussianBlurOperation.h"
static float smoothMask(float x, float y)
{
float t;
x = 2.0f * x - 1.0f;
y = 2.0f * y - 1.0f;
if ((t = 1.0f - sqrtf(x * x + y * y)) > 0.0f) {
return t;
}
else {
return 0.0f;
}
}
void GlareGhostOperation::generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings)
{
const int qt = 1 << settings->quality;
const float s1 = 4.f / (float)qt, s2 = 2.f * s1;
int x, y, n, p, np;
fRGB c, tc, cm[64];
float sc, isc, u, v, sm, s, t, ofs, scalef[64];
const float cmo = 1.f - settings->colmod;
MemoryBuffer *gbuf = inputTile->duplicate();
MemoryBuffer *tbuf1 = inputTile->duplicate();
bool breaked = false;
FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 0, 3);
if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 1, 3);
if (isBreaked()) breaked = true;
if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 2, 3);
MemoryBuffer *tbuf2 = tbuf1->duplicate();
if (isBreaked()) breaked = true;
if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 0, 3);
if (isBreaked()) breaked = true;
if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 1, 3);
if (isBreaked()) breaked = true;
if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 2, 3);
if (settings->iter & 1) ofs = 0.5f; else ofs = 0.f;
for (x = 0; x < (settings->iter * 4); x++) {
y = x & 3;
cm[x][0] = cm[x][1] = cm[x][2] = 1;
if (y == 1) fRGB_rgbmult(cm[x], 1.f, cmo, cmo);
if (y == 2) fRGB_rgbmult(cm[x], cmo, cmo, 1.f);
if (y == 3) fRGB_rgbmult(cm[x], cmo, 1.f, cmo);
scalef[x] = 2.1f * (1.f - (x + ofs) / (float)(settings->iter * 4));
if (x & 1) scalef[x] = -0.99f / scalef[x];
}
sc = 2.13;
isc = -0.97;
for (y = 0; y < gbuf->getHeight() && (!breaked); y++) {
v = ((float)y + 0.5f) / (float)gbuf->getHeight();
for (x = 0; x < gbuf->getWidth(); x++) {
u = ((float)x + 0.5f) / (float)gbuf->getWidth();
s = (u - 0.5f) * sc + 0.5f, t = (v - 0.5f) * sc + 0.5f;
tbuf1->readBilinear(c, s * gbuf->getWidth(), t * gbuf->getHeight());
sm = smoothMask(s, t);
mul_v3_fl(c, sm);
s = (u - 0.5f) * isc + 0.5f, t = (v - 0.5f) * isc + 0.5f;
tbuf2->readBilinear(tc, s * gbuf->getWidth() - 0.5f, t * gbuf->getHeight() - 0.5f);
sm = smoothMask(s, t);
madd_v3_v3fl(c, tc, sm);
gbuf->writePixel(x, y, c);
}
if (isBreaked()) breaked = true;
}
memset(tbuf1->getBuffer(), 0, tbuf1->getWidth() * tbuf1->getHeight() * COM_NUM_CHANNELS_COLOR * sizeof(float));
for (n = 1; n < settings->iter && (!breaked); n++) {
for (y = 0; y < gbuf->getHeight() && (!breaked); y++) {
v = ((float)y + 0.5f) / (float)gbuf->getHeight();
for (x = 0; x < gbuf->getWidth(); x++) {
u = ((float)x + 0.5f) / (float)gbuf->getWidth();
tc[0] = tc[1] = tc[2] = 0.f;
for (p = 0; p < 4; p++) {
np = (n << 2) + p;
s = (u - 0.5f) * scalef[np] + 0.5f;
t = (v - 0.5f) * scalef[np] + 0.5f;
gbuf->readBilinear(c, s * gbuf->getWidth() - 0.5f, t * gbuf->getHeight() - 0.5f);
mul_v3_v3(c, cm[np]);
sm = smoothMask(s, t) * 0.25f;
madd_v3_v3fl(tc, c, sm);
}
tbuf1->addPixel(x, y, tc);
}
if (isBreaked()) breaked = true;
}
memcpy(gbuf->getBuffer(), tbuf1->getBuffer(), tbuf1->getWidth() * tbuf1->getHeight() * COM_NUM_CHANNELS_COLOR * sizeof(float));
}
memcpy(data, gbuf->getBuffer(), gbuf->getWidth() * gbuf->getHeight() * COM_NUM_CHANNELS_COLOR * sizeof(float));
delete gbuf;
delete tbuf1;
delete tbuf2;
}
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