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Fix calculation of interpolation parameters for negative block shifts, #4774, #4777

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heckflosse
2018-09-12 14:24:41 +02:00
parent d1f63f621a
commit 7cbf1f6d8d
1 changed files with 8 additions and 2 deletions
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10
rtengine/CA_correct_RT.cc
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@@ -1029,11 +1029,17 @@ float* RawImageSource::CA_correct_RT(
//some parameters for the bilinear interpolation
shiftvfloor[c] = floor((float)lblockshifts[c>>1][0]);
shiftvceil[c] = ceil((float)lblockshifts[c>>1][0]);
shiftvfrac[c] = lblockshifts[c>>1][0] - shiftvfloor[c];
if (lblockshifts[c>>1][0] < 0.f) {
std::swap(shiftvfloor[c], shiftvceil[c]);
}
shiftvfrac[c] = fabs(lblockshifts[c>>1][0] - shiftvfloor[c]);
shifthfloor[c] = floor((float)lblockshifts[c>>1][1]);
shifthceil[c] = ceil((float)lblockshifts[c>>1][1]);
shifthfrac[c] = lblockshifts[c>>1][1] - shifthfloor[c];
if (lblockshifts[c>>1][1] < 0.f) {
std::swap(shifthfloor[c], shifthceil[c]);
}
shifthfrac[c] = fabs(lblockshifts[c>>1][1] - shifthfloor[c]);
GRBdir[0][c] = lblockshifts[c>>1][0] > 0 ? 2 : -2;
GRBdir[1][c] = lblockshifts[c>>1][1] > 0 ? 2 : -2;