4a1ce71fd9
overhead if constant values are passed (as happens with most calls using the default argument).
97 lines
3.3 KiB
C++
97 lines
3.3 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_GlareStreaksOperation.h"
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#include "BLI_math.h"
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void GlareStreaksOperation::generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings)
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{
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int x, y, n;
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unsigned int nump = 0;
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float c1[4], c2[4], c3[4], c4[4];
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float a, ang = DEG2RADF(360.0f) / (float)settings->angle;
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int size = inputTile->getWidth() * inputTile->getHeight();
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int size4 = size * 4;
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bool breaked = false;
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MemoryBuffer *tsrc = inputTile->duplicate();
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MemoryBuffer *tdst = new MemoryBuffer(NULL, inputTile->getRect());
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tdst->clear();
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memset(data, 0, size4 * sizeof(float));
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for (a = 0.f; a < DEG2RADF(360.0f) && (!breaked); a += ang) {
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const float an = a + settings->angle_ofs;
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const float vx = cos((double)an), vy = sin((double)an);
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for (n = 0; n < settings->iter && (!breaked); ++n) {
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const float p4 = pow(4.0, (double)n);
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const float vxp = vx * p4, vyp = vy * p4;
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const float wt = pow((double)settings->fade, (double)p4);
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const float cmo = 1.f - (float)pow((double)settings->colmod, (double)n + 1); // colormodulation amount relative to current pass
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float *tdstcol = tdst->getBuffer();
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for (y = 0; y < tsrc->getHeight() && (!breaked); ++y) {
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for (x = 0; x < tsrc->getWidth(); ++x, tdstcol += 4) {
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// first pass no offset, always same for every pass, exact copy,
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// otherwise results in uneven brightness, only need once
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if (n == 0) tsrc->read(c1, x, y); else c1[0] = c1[1] = c1[2] = 0;
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tsrc->readBilinear(c2, x + vxp, y + vyp);
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tsrc->readBilinear(c3, x + vxp * 2.f, y + vyp * 2.f);
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tsrc->readBilinear(c4, x + vxp * 3.f, y + vyp * 3.f);
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// modulate color to look vaguely similar to a color spectrum
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c2[1] *= cmo;
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c2[2] *= cmo;
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c3[0] *= cmo;
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c3[1] *= cmo;
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c4[0] *= cmo;
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c4[2] *= cmo;
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tdstcol[0] = 0.5f * (tdstcol[0] + c1[0] + wt * (c2[0] + wt * (c3[0] + wt * c4[0])));
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tdstcol[1] = 0.5f * (tdstcol[1] + c1[1] + wt * (c2[1] + wt * (c3[1] + wt * c4[1])));
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tdstcol[2] = 0.5f * (tdstcol[2] + c1[2] + wt * (c2[2] + wt * (c3[2] + wt * c4[2])));
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tdstcol[3] = 1.0f;
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}
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if (isBreaked()) {
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breaked = true;
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}
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}
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memcpy(tsrc->getBuffer(), tdst->getBuffer(), sizeof(float) * size4);
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}
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float *sourcebuffer = tsrc->getBuffer();
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float factor = 1.f / (float)(6 - settings->iter);
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for (int i = 0; i < size4; i += 4) {
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madd_v3_v3fl(&data[i], &sourcebuffer[i], factor);
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data[i + 3] = 1.0f;
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}
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tdst->clear();
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memcpy(tsrc->getBuffer(), inputTile->getBuffer(), sizeof(float) * size4);
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nump++;
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}
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delete tsrc;
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delete tdst;
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}
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