//======================================================================== // // GfxState.cc // // Copyright 1996-2003 Glyph & Cog, LLC // //======================================================================== //======================================================================== // // Modified under the Poppler project - http://poppler.freedesktop.org // // All changes made under the Poppler project to this file are licensed // under GPL version 2 or later // // Copyright (C) 2009 Albert Astals Cid // // To see a description of the changes please see the Changelog file that // came with your tarball or type make ChangeLog if you are building from git // //======================================================================== static inline GfxColorComp clip01(GfxColorComp x) { return (x < 0) ? 0 : (x > gfxColorComp1) ? gfxColorComp1 : x; } static inline double clip01(double x) { return (x < 0) ? 0 : (x > 1) ? 1 : x; } static inline void cmykToRGBMatrixMultiplication(const double &c, const double &m, const double &y, const double &k, const double &c1, const double &m1, const double &y1, const double &k1, double &r, double &g, double &b) { double x; // this is a matrix multiplication, unrolled for performance // C M Y K x = c1 * m1 * y1 * k1; // 0 0 0 0 r = g = b = x; x = c1 * m1 * y1 * k; // 0 0 0 1 r += 0.1373 * x; g += 0.1216 * x; b += 0.1255 * x; x = c1 * m1 * y * k1; // 0 0 1 0 r += x; g += 0.9490 * x; x = c1 * m1 * y * k; // 0 0 1 1 r += 0.1098 * x; g += 0.1020 * x; x = c1 * m * y1 * k1; // 0 1 0 0 r += 0.9255 * x; b += 0.5490 * x; x = c1 * m * y1 * k; // 0 1 0 1 r += 0.1412 * x; x = c1 * m * y * k1; // 0 1 1 0 r += 0.9294 * x; g += 0.1098 * x; b += 0.1412 * x; x = c1 * m * y * k; // 0 1 1 1 r += 0.1333 * x; x = c * m1 * y1 * k1; // 1 0 0 0 g += 0.6784 * x; b += 0.9373 * x; x = c * m1 * y1 * k; // 1 0 0 1 g += 0.0588 * x; b += 0.1412 * x; x = c * m1 * y * k1; // 1 0 1 0 g += 0.6510 * x; b += 0.3137 * x; x = c * m1 * y * k; // 1 0 1 1 g += 0.0745 * x; x = c * m * y1 * k1; // 1 1 0 0 r += 0.1804 * x; g += 0.1922 * x; b += 0.5725 * x; x = c * m * y1 * k; // 1 1 0 1 b += 0.0078 * x; x = c * m * y * k1; // 1 1 1 0 r += 0.2118 * x; g += 0.2119 * x; b += 0.2235 * x; }