/* * This file is part of RawTherapee. * * Copyright (c) 2004-2010 Gabor Horvath * * RawTherapee is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * RawTherapee is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with RawTherapee. If not, see . */ #include #include #include #include #undef MAX #undef MIN #define MAX(a,b) ((a)<(b)?(b):(a)) #define MIN(a,b) ((a)>(b)?(b):(a)) namespace rtengine { void bilinearInterp (const unsigned char* src, int sw, int sh, unsigned char* dst, int dw, int dh) { int ix = 0; for (int i=0; i=sh) sy = sh-1; double dy = (double)i*sh/dh - sy; int ny = sy+1; if (ny>=sh) ny = sy; int or1 = 3*sw*sy; int or2 = 3*sw*ny; for (int j=0; j=sw) sx = sw; double dx = (double)j*sw/dw - sx; int nx = sx+1; if (nx>=sw) nx = sx; int ofs11 = or1 + 3*sx; int ofs12 = or1 + 3*nx; int ofs21 = or2 + 3*sx; int ofs22 = or2 + 3*nx; unsigned int val = src[ofs11]*(1-dx)*(1-dy) + src[ofs12]*dx*(1-dy) + src[ofs21]*(1-dx)*dy + src[ofs22]*dx*dy; dst[ix++] = val; ofs11++; ofs12++; ofs21++; ofs22++; val = src[ofs11]*(1-dx)*(1-dy) + src[ofs12]*dx*(1-dy) + src[ofs21]*(1-dx)*dy + src[ofs22]*dx*dy; dst[ix++] = val; ofs11++; ofs12++; ofs21++; ofs22++; val = src[ofs11]*(1-dx)*(1-dy) + src[ofs12]*dx*(1-dy) + src[ofs21]*(1-dx)*dy + src[ofs22]*dx*dy; dst[ix++] = val; } } } void nearestInterp (const unsigned char* src, int sw, int sh, unsigned char* dst, int dw, int dh) { int ix = 0; for (int i=0; i 1 ) h -= 1; } } void hsv2rgb (float h, float s, float v, int &r, int &g, int &b) { float h1 = h*6; // sector 0 to 5 int i = floor( h1 ); float f = h1 - i; // fractional part of h float p = v * ( 1 - s ); float q = v * ( 1 - s * f ); float t = v * ( 1 - s * ( 1 - f ) ); float r1,g1,b1; if (i==0) {r1 = v; g1 = t; b1 = p;} else if (i==1) {r1 = q; g1 = v; b1 = p;} else if (i==2) {r1 = p; g1 = v; b1 = t;} else if (i==3) {r1 = p; g1 = q; b1 = v;} else if (i==4) {r1 = t; g1 = p; b1 = v;} else if (i==5) {r1 = v; g1 = p; b1 = q;} r = (int)( r1 * 65535); g = (int)( g1 * 65535); b = (int)( b1 * 65535); } // The same function but set float values instead if int // Function copied for speed concerns void hsv2rgb (float h, float s, float v, float &r, float &g, float &b) { float h1 = h*6; // sector 0 to 5 int i = floor( h1 ); float f = h1 - i; // fractional part of h float p = v * ( 1 - s ); float q = v * ( 1 - s * f ); float t = v * ( 1 - s * ( 1 - f ) ); if (i==0) {r = v; g = t; b = p;} else if (i==1) {r = q; g = v; b = p;} else if (i==2) {r = p; g = v; b = t;} else if (i==3) {r = p; g = q; b = v;} else if (i==4) {r = t; g = p; b = v;} else if (i==5) {r = v; g = p; b = q;} } }