-// -*- C++ -*-
-/* This file is part of
- * ======================================================
- *
- * LyX, The Document Processor
- *
- * Copyright 1995 Matthias Ettrich
- * Copyright 1995-2000 The LyX Team.
+/**
+ * \file Color.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
*
- *======================================================*/
+ * \author Angus Leeming
+ *
+ * Full author contact details are available in file CREDITS
+ */
#include <config.h>
-#ifdef __GNUG_
+#ifdef __GNUG__
#pragma implementation
#endif
+#include "Color.h"
#include <algorithm> // max
#include <cmath> // floor
-#include "Color.h"
+#include FORMS_H_LOCATION
+
+#ifndef CXX_GLOBAL_CSTD
+using std::floor;
+#endif
using std::max;
using std::min;
-static int const nohue = -1;
+namespace {
-RGB::RGB( HSV const & hsv )
+int const nohue = -1;
+
+} // namespace anon
+
+RGBColor::RGBColor(HSVColor const & hsv)
{
double h = hsv.h;
- double s = hsv.s;
- double v = hsv.v;
-
+ double const s = hsv.s;
+ double const v = hsv.v;
+
double rd, gd, bd;
-
- if( h == nohue || s == 0.0 ) {
+
+ if (h == nohue || s == 0.0) {
rd = gd = bd = v;
} else {
- if( h == 360.0 ) h = 0.0;
+ if (h == 360.0) h = 0.0;
h /= 60.0;
- int j = static_cast<int>( ::floor(h) );
- if( j < 0 ) j = 0;
+ int const j = max(0, static_cast<int>(::floor(h)));
+ //if (j < 0) j = 0;
- double f = h - j;
- double p = v * (1.0 - s);
- double q = v * (1.0 - (s*f));
- double t = v * (1.0 - (s*(1.0 - f)));
+ double const f = h - j;
+ double const p = v * (1.0 - s);
+ double const q = v * (1.0 - (s * f));
+ double const t = v * (1.0 - (s * (1.0 - f)));
- switch( j ) {
+ switch (j) {
case 0:
rd = v;
gd = t;
}
}
- r = static_cast<int>( ::floor((rd * 255.0) + 0.5) );
- g = static_cast<int>( ::floor((gd * 255.0) + 0.5) );
- b = static_cast<int>( ::floor((bd * 255.0) + 0.5) );
+ r = static_cast<int>(::floor((rd * 255.0) + 0.5));
+ g = static_cast<int>(::floor((gd * 255.0) + 0.5));
+ b = static_cast<int>(::floor((bd * 255.0) + 0.5));
}
-HSV::HSV( RGB const & rgb )
+HSVColor::HSVColor(RGBColor const & rgb)
{
- // r, g, b lie in the range 0-1, not 0-255.
- double r = rgb.r / 255.0;
- double g = rgb.g / 255.0;
- double b = rgb.b / 255.0;
+ double const r = rgb.r / 255.0;
+ double const g = rgb.g / 255.0;
+ double const b = rgb.b / 255.0;
- double maxval = max( max( r, g ), b );
- double minval = max( min( r, g ), b );
+ double const maxval = max(max(r, g), b);
+ double const minval = min(min(r, g), b);
v = maxval;
- double diff = maxval - minval;
- if( maxval != 0.0 )
+ double const diff = maxval - minval;
+ if (maxval != 0.0)
s = diff / maxval;
else
s = 0.0;
h = nohue;
- if( s != 0.0 ) {
- double rc = (maxval - r) / diff;
- double gc = (maxval - g) / diff;
- double bc = (maxval - b) / diff;
+ if (s != 0.0) {
+ double const rc = (maxval - r) / diff;
+ double const gc = (maxval - g) / diff;
+ double const bc = (maxval - b) / diff;
- if( r == maxval )
+ if (r == maxval)
h = bc - gc;
- else if( g == maxval )
+ else if (g == maxval)
h = 2.0 + rc - bc;
- else if( b == maxval )
+ else if (b == maxval)
h = 4.0 + gc - rc;
h *= 60.0;
- if ( h < 0 )
+ if (h < 0)
h += 360;
}
}
-