126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
/*
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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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* Copyright 2011, Blender Foundation.
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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 = 2.0f * x - 1.0f;
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y = 2.0f * y - 1.0f;
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if ((t = 1.0f - sqrtf(x * x + y * y)) > 0.0f) {
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return t;
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}
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else {
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return 0.0f;
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}
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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 = 4.0f / (float)qt, s2 = 2.0f * 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 = 1.0f - settings->colmod;
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MemoryBuffer *gbuf = inputTile->duplicate();
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MemoryBuffer *tbuf1 = inputTile->duplicate();
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bool breaked = false;
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FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 0, 3);
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if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 1, 3);
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if (isBreaked()) breaked = true;
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if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf1, s1, 2, 3);
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MemoryBuffer *tbuf2 = tbuf1->duplicate();
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if (isBreaked()) breaked = true;
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if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 0, 3);
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if (isBreaked()) breaked = true;
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if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 1, 3);
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if (isBreaked()) breaked = true;
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if (!breaked) FastGaussianBlurOperation::IIR_gauss(tbuf2, s2, 2, 3);
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ofs = (settings->iter & 1) ? 0.5f : 0.0f;
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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], 1.0f, cmo, cmo);
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if (y == 2) fRGB_rgbmult(cm[x], cmo, cmo, 1.0f);
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if (y == 3) fRGB_rgbmult(cm[x], cmo, 1.0f, cmo);
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scalef[x] = 2.1f * (1.0f - (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() && (!breaked); 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;
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t = (v - 0.5f) * sc + 0.5f;
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tbuf1->readBilinear(c, s * gbuf->getWidth(), t * gbuf->getHeight());
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sm = smoothMask(s, t);
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mul_v3_fl(c, sm);
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s = (u - 0.5f) * isc + 0.5f;
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t = (v - 0.5f) * isc + 0.5f;
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tbuf2->readBilinear(tc, s * gbuf->getWidth() - 0.5f, t * gbuf->getHeight() - 0.5f);
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sm = smoothMask(s, t);
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madd_v3_v3fl(c, tc, sm);
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gbuf->writePixel(x, y, c);
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}
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if (isBreaked()) breaked = true;
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}
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memset(tbuf1->getBuffer(), 0, tbuf1->getWidth() * tbuf1->getHeight() * COM_NUM_CHANNELS_COLOR * sizeof(float));
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for (n = 1; n < settings->iter && (!breaked); n++) {
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for (y = 0; y < gbuf->getHeight() && (!breaked); 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] = 0.0f;
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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->readBilinear(c, s * gbuf->getWidth() - 0.5f, t * gbuf->getHeight() - 0.5f);
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mul_v3_v3(c, cm[np]);
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sm = smoothMask(s, t) * 0.25f;
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madd_v3_v3fl(tc, c, sm);
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}
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tbuf1->addPixel(x, y, tc);
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}
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if (isBreaked()) breaked = true;
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}
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memcpy(gbuf->getBuffer(), tbuf1->getBuffer(), tbuf1->getWidth() * tbuf1->getHeight() * COM_NUM_CHANNELS_COLOR * sizeof(float));
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}
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memcpy(data, gbuf->getBuffer(), gbuf->getWidth() * gbuf->getHeight() * COM_NUM_CHANNELS_COLOR * 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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