62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
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* This file is part of RawTherapee.
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*
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* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
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*
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* RawTherapee is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* RawTherapee is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
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*/
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inline void cubintch (unsigned short** src, int xs, int ys, double Dx, double Dy, unsigned short *r, double mul) {
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register double w[4];
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{ register double t1, t2;
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t1 = -A*(Dx-1.0)*Dx;
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t2 = (3.0-2.0*Dx)*Dx*Dx;
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w[3] = t1*Dx;
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w[2] = t1*(Dx-1.0) + t2;
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w[1] = -t1*Dx + 1.0 - t2;
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w[0] = -t1*(Dx-1.0);
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}
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register double rd;
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double yr[4];
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for (int k=ys, kx=0; k<ys+4; k++, kx++) {
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rd = 0.0;
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for (int i=xs, ix=0; i<xs+4; i++, ix++) {
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rd += src[k][i] * w[ix];
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}
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yr[kx] = rd;
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}
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{ register double t1, t2;
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t1 = -A*(Dy-1.0)*Dy;
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t2 = (3.0-2.0*Dy)*Dy*Dy;
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w[3] = t1*Dy;
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w[2] = t1*(Dy-1.0) + t2;
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w[1] = -t1*Dy + 1.0 - t2;
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w[0] = -t1*(Dy-1.0);
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}
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rd = 0.0;
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for (int i=0; i<4; i++)
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rd += yr[i] * w[i];
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rd*=mul;
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*r = (int)CLIP(rd);
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}
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