| //======================================================================== |
| // |
| // 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, 2011, 2018, 2019 Albert Astals Cid <aacid@kde.org> |
| // Copyright (C) 2019 Oliver Sander <oliver.sander@tu-dresden.de> |
| // |
| // 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 |
| // |
| //======================================================================== |
| |
| #ifndef GFXSTATE_HELPERS_H |
| #define GFXSTATE_HELPERS_H |
| |
| #include "GfxState.h" |
| |
| 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; |
| } |
| |
| #endif |