115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor:
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* Jeroen Bakker
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* Monique Dewanchand
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*/
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#include "COM_GlareGhostOperation.h"
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#include "BLI_math.h"
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#include "COM_FastGaussianBlurOperation.h"
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static float smoothMask(float x, float y)
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{
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float t;
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x = 2.f*x - 1.f, y = 2.f*y - 1.f;
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if ((t = 1.f - sqrtf(x*x + y*y)) <= 0.f) return 0.f;
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return t;
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}
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void GlareGhostOperation::generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings)
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{
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const int qt = 1 << settings->quality;
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const float s1 = 4.f/(float)qt, s2 = 2.f*s1;
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int x, y, n, p, np;
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fRGB c, tc, cm[64];
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float sc, isc, u, v, sm, s, t, ofs, scalef[64];
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const float cmo = 1.f - settings->colmod;
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MemoryBuffer *gbuf = inputTile->duplicate();
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MemoryBuffer *tbuf1 = inputTile->duplicate();
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FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 0, 3);
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FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 1, 3);
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FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 2, 3);
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MemoryBuffer *tbuf2 = tbuf1->duplicate();
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FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 0, 3);
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FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 1, 3);
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FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 2, 3);
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if (settings->iter & 1) ofs = 0.5f; else ofs = 0.f;
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for (x=0; x<(settings->iter*4); x++) {
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y = x & 3;
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cm[x][0] = cm[x][1] = cm[x][2] = 1;
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if (y==1) fRGB_rgbmult(cm[x], 1.f, cmo, cmo);
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if (y==2) fRGB_rgbmult(cm[x], cmo, cmo, 1.f);
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if (y==3) fRGB_rgbmult(cm[x], cmo, 1.f, cmo);
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scalef[x] = 2.1f*(1.f-(x+ofs)/(float)(settings->iter*4));
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if (x & 1) scalef[x] = -0.99f/scalef[x];
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}
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sc = 2.13;
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isc = -0.97;
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for (y=0; y<gbuf->getHeight(); y++) {
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v = (float)(y+0.5f) / (float)gbuf->getHeight();
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for (x=0; x<gbuf->getWidth(); x++) {
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u = (float)(x+0.5f) / (float)gbuf->getWidth();
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s = (u-0.5f)*sc + 0.5f, t = (v-0.5f)*sc + 0.5f;
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tbuf1->read(c, s*gbuf->getWidth(), t*gbuf->getHeight());
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sm = smoothMask(s, t);
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fRGB_mult(c, sm);
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s = (u-0.5f)*isc + 0.5f, t = (v-0.5f)*isc + 0.5f;
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tbuf2->read(tc, s*gbuf->getWidth()-0.5f, t*gbuf->getHeight()-0.5f);
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sm = smoothMask(s, t);
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fRGB_madd(c, tc, sm);
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gbuf->writePixel(x, y, c);
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}
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}
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memset(tbuf1->getBuffer(), 0, tbuf1->getWidth()*tbuf1->getHeight()*COM_NUMBER_OF_CHANNELS*sizeof(float));
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for (n=1; n<settings->iter; n++) {
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for (y=0; y<gbuf->getHeight(); y++) {
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v = (float)(y+0.5f) / (float)gbuf->getHeight();
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for (x=0; x<gbuf->getWidth(); x++) {
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u = (float)(x+0.5f) / (float)gbuf->getWidth();
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tc[0] = tc[1] = tc[2] = 0.f;
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for (p=0;p<4;p++) {
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np = (n<<2) + p;
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s = (u-0.5f)*scalef[np] + 0.5f;
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t = (v-0.5f)*scalef[np] + 0.5f;
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gbuf->read(c, s*gbuf->getWidth() - 0.5f, t*gbuf->getHeight() - 0.5f);
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fRGB_colormult(c, cm[np]);
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sm = smoothMask(s, t)*0.25f;
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fRGB_madd(tc, c, sm);
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}
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tbuf1->writePixel(x, y, tc);
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}
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}
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memcpy(gbuf->getBuffer(), tbuf1->getBuffer(), tbuf1->getWidth()*tbuf1->getHeight()*COM_NUMBER_OF_CHANNELS*sizeof(float));
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}
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memcpy(data, gbuf->getBuffer(), gbuf->getWidth()*gbuf->getHeight()*COM_NUMBER_OF_CHANNELS*sizeof(float));
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delete gbuf;
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delete tbuf1;
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delete tbuf2;
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}
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