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Speedup for thumbnail processing

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This commit is contained in:
heckflosse
2016-05-01 00:16:06 +02:00
parent e61e488346
commit 2dd2f5ca17
14 changed files with 427 additions and 800 deletions
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6
rtengine/diagonalcurves.cc
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@@ -301,10 +301,10 @@ double DiagonalCurve::getVal (double t) const
}
// do a binary search for the right interval:
int k_lo = 0, k_hi = N - 1;
unsigned int k_lo = 0, k_hi = N - 1;
while (k_hi - k_lo > 1) {
int k = (k_hi + k_lo) / 2;
unsigned int k = (k_hi + k_lo) / 2;
if (x[k] > t) {
k_hi = k;
@@ -323,7 +323,7 @@ double DiagonalCurve::getVal (double t) const
else { // if (kind==Spline) {
double a = (x[k_hi] - t) / h;
double b = (t - x[k_lo]) / h;
double r = a * y[k_lo] + b * y[k_hi] + ((a * a * a - a) * ypp[k_lo] + (b * b * b - b) * ypp[k_hi]) * (h * h) / 6.0;
double r = a * y[k_lo] + b * y[k_hi] + ((a * a * a - a) * ypp[k_lo] + (b * b * b - b) * ypp[k_hi]) * (h * h) * 0.1666666666666666666666666666666;
return CLIPD(r);
}