void SpecularBloom::apply(Image* image) {
// TODO: Wouldn't a more lightweight <double,1> do the job too?
Image* glow = new ImageImpl<double,4>(*image);
RGBA black = RGBA(0,0,0,0);
int w = image->getWidth();
int h = image->getHeight();
for(int x = 0; x < w; x++) {
for(int y = 0; y < h; y++) {
RGBA col = glow->getRGBA(x,y);
if (col.brightness() > cutoff) {
col = col.toGrayscale();
} else {
col = black;
}
glow->setRGBA(x,y,col);
}
}
// Clip colors
glow->clipColors();
GaussianBlur blur_filter = GaussianBlur(radius);
blur_filter.apply(glow);
//image->copy(glow);
for(int x = 0; x < w; x++) {
for(int y = 0; y < h; y++) {
RGBA col = image->getRGBA(x,y);
col += alpha * glow->getRGBA(x,y);
image->setRGBA(x,y,col);
}
}
delete glow;
}
