diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_GlareStreaksOperation.cpp')
-rw-r--r-- | source/blender/compositor/operations/COM_GlareStreaksOperation.cpp | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_GlareStreaksOperation.cpp b/source/blender/compositor/operations/COM_GlareStreaksOperation.cpp new file mode 100644 index 00000000000..177bb6e0730 --- /dev/null +++ b/source/blender/compositor/operations/COM_GlareStreaksOperation.cpp @@ -0,0 +1,94 @@ +/* + * 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_GlareStreaksOperation.h" +#include "BLI_math.h" + +void GlareStreaksOperation::generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings) { + int x, y, n; + unsigned int nump=0; + float c1[4], c2[4], c3[4], c4[4]; + float a, ang = DEG2RADF(360.0f)/(float)settings->angle; + + int size = inputTile->getWidth()*inputTile->getHeight(); + int size4 = size*4; + + + MemoryBuffer* tsrc = inputTile->duplicate(); + MemoryBuffer* tdst = new MemoryBuffer(NULL, inputTile->getRect()); + tdst->clear(); + memset(data, 0, size4*sizeof(float)); + + for (a=0.f; a<DEG2RADF(360.0f); a+=ang) { + const float an = a + settings->angle_ofs; + const float vx = cos((double)an), vy = sin((double)an); + for (n=0; n<settings->iter; ++n) { + const float p4 = pow(4.0, (double)n); + const float vxp = vx*p4, vyp = vy*p4; + const float wt = pow((double)settings->fade, (double)p4); + const float cmo = 1.f - (float)pow((double)settings->colmod, (double)n+1); // colormodulation amount relative to current pass + float* tdstcol = tdst->getBuffer(); + for (y=0; y<tsrc->getHeight(); ++y) { + for (x=0; x<tsrc->getWidth(); ++x, tdstcol+=4) { + // first pass no offset, always same for every pass, exact copy, + // otherwise results in uneven brightness, only need once + if (n==0) tsrc->read(c1, x, y); else c1[0]=c1[1]=c1[2]=0; + tsrc->readCubic(c2, x + vxp, y + vyp); + tsrc->readCubic(c3, x + vxp*2.f, y + vyp*2.f); + tsrc->readCubic(c4, x + vxp*3.f, y + vyp*3.f); + // modulate color to look vaguely similar to a color spectrum + c2[1] *= cmo; + c2[2] *= cmo; + + c3[0] *= cmo; + c3[1] *= cmo; + + c4[0] *= cmo; + c4[2] *= cmo; + + tdstcol[0] = 0.5f*(tdstcol[0] + c1[0] + wt*(c2[0] + wt*(c3[0] + wt*c4[0]))); + tdstcol[1] = 0.5f*(tdstcol[1] + c1[1] + wt*(c2[1] + wt*(c3[1] + wt*c4[1]))); + tdstcol[2] = 0.5f*(tdstcol[2] + c1[2] + wt*(c2[2] + wt*(c3[2] + wt*c4[2]))); + tdstcol[3] = 1.0f; + } + } + memcpy(tsrc->getBuffer(), tdst->getBuffer(), sizeof(float)*size4); + } + +// addImage(sbuf, tsrc, 1.f/(float)(6 - ndg->iter)); // add result to data @todo + float* sourcebuffer = tsrc->getBuffer(); + float factor = 1.f/(float)(6 - settings->iter); + for (int i = 0 ; i < size4; i ++) { + data[i] += sourcebuffer[i] * factor; + } + for (int i = 0 ; i < size; i ++) { + data[i*4+3] = 1.0f; + } + + tdst->clear(); + memcpy(tsrc->getBuffer(), inputTile->getBuffer(), sizeof(float)*size4); + nump++; + } + + delete tsrc; + delete tdst; +} |