Jeroen Bakker
be1b5f82ce
* break out with glare node * Added OpenCL kernels compatible with AMD still need some testing.
99 lines
3.3 KiB
C++
99 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->readCubic(c2, x + vxp, y + vyp);
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tsrc->readCubic(c3, x + vxp*2.f, y + vyp*2.f);
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tsrc->readCubic(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 ++) {
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data[i] += sourcebuffer[i] * factor;
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}
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for (int i = 0 ; i < size; i ++) {
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data[i*4+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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