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SSE code for vertical part of boxblur

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heckflosse
2015-11-03 14:17:56 +01:00
parent 5ddc43278c
commit 0edbe74fd3
2 changed files with 95 additions and 39 deletions
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37
rtengine/gauss.h
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@@ -768,32 +768,41 @@ template<class T> void gaussianBlur(T** src, T** dst, const int W, const int H,
if(buffer) { // use iterated boxblur to approximate gaussian blur
// Compute ideal averaging filter width and number of iterations
int n = 1;
double wIdeal = sqrt((12*sigma*sigma)+1);
double wIdeal = sqrt((12 * sigma * sigma) + 1);
while(wIdeal > W || wIdeal > H) {
n++;
wIdeal = sqrt((12*sigma*sigma/n)+1);
wIdeal = sqrt((12 * sigma * sigma / n) + 1);
}
if(n<3) {
if(n < 3) {
n = 3;
wIdeal = sqrt((12*sigma*sigma/n)+1);
} else if(n>6)
n=6;
wIdeal = sqrt((12 * sigma * sigma / n) + 1);
} else if(n > 6) {
n = 6;
}
int wl = wIdeal;
if(wl%2==0) wl--;
int wu = wl+2;
double mIdeal = (12*sigma*sigma - n*wl*wl - 4*n*wl - 3*n)/(-4*wl - 4);
if(wl % 2 == 0) {
wl--;
}
int wu = wl + 2;
double mIdeal = (12 * sigma * sigma - n * wl * wl - 4 * n * wl - 3 * n) / (-4 * wl - 4);
int m = round(mIdeal);
int sizes[n];
for(int i=0; i<n; i++) {
sizes[i] = ((i<m?wl:wu)-1)/2;
for(int i = 0; i < n; i++) {
sizes[i] = ((i < m ? wl : wu) - 1) / 2;
}
rtengine::boxblur(src,dst,buffer,sizes[0],sizes[0],W,H);
for(int i=1; i<n; i++) {
rtengine::boxblur(dst,dst,buffer, sizes[i],sizes[i],W,H);
rtengine::boxblur(src, dst, buffer, sizes[0], sizes[0], W, H);
for(int i = 1; i < n; i++) {
rtengine::boxblur(dst, dst, buffer, sizes[i], sizes[i], W, H);
}
} else {