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-/* This was part of the KDE project - see KGuiAddons
- * Copyright (C) 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
- * Copyright (C) 2007 Olaf Schmidt <ojschmidt@kde.org>
- * Copyright (C) 2007 Thomas Zander <zander@kde.org>
- * Copyright (C) 2007 Zack Rusin <zack@kde.org>
- * Copyright (C) 2015 Petr Mrazek <peterix@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#pragma once
-
-#include "rainbow_config.h"
-
-#include <QPainter>
-class QColor;
-
-/**
- * A set of methods used to work with colors.
- */
-namespace Rainbow
-{
-/**
- * Calculate the luma of a color. Luma is weighted sum of gamma-adjusted
- * R'G'B' components of a color. The result is similar to qGray. The range
- * is from 0.0 (black) to 1.0 (white).
- *
- * Rainbow::darken(), Rainbow::lighten() and Rainbow::shade()
- * operate on the luma of a color.
- *
- * @see http://en.wikipedia.org/wiki/Luma_(video)
- */
-RAINBOW_EXPORT qreal luma(const QColor &);
-
-/**
- * Calculate hue, chroma and luma of a color in one call.
- * @since 5.0
- */
-RAINBOW_EXPORT void getHcy(const QColor &, qreal *hue, qreal *chroma, qreal *luma,
-						   qreal *alpha = 0);
-
-/**
- * Calculate the contrast ratio between two colors, according to the
- * W3C/WCAG2.0 algorithm, (Lmax + 0.05)/(Lmin + 0.05), where Lmax and Lmin
- * are the luma values of the lighter color and the darker color,
- * respectively.
- *
- * A contrast ration of 5:1 (result == 5.0) is the minimum for "normal"
- * text to be considered readable (large text can go as low as 3:1). The
- * ratio ranges from 1:1 (result == 1.0) to 21:1 (result == 21.0).
- *
- * @see Rainbow::luma
- */
-RAINBOW_EXPORT qreal contrastRatio(const QColor &, const QColor &);
-
-/**
- * Adjust the luma of a color by changing its distance from white.
- *
- * @li amount == 1.0 gives white
- * @li amount == 0.5 results in a color whose luma is halfway between 1.0
- * and that of the original color
- * @li amount == 0.0 gives the original color
- * @li amount == -1.0 gives a color that is 'twice as far from white' as
- * the original color, that is luma(result) == 1.0 - 2*(1.0 - luma(color))
- *
- * @param amount factor by which to adjust the luma component of the color
- * @param chromaInverseGain (optional) factor by which to adjust the chroma
- * component of the color; 1.0 means no change, 0.0 maximizes chroma
- * @see Rainbow::shade
- */
-RAINBOW_EXPORT QColor
-lighten(const QColor &, qreal amount = 0.5, qreal chromaInverseGain = 1.0);
-
-/**
- * Adjust the luma of a color by changing its distance from black.
- *
- * @li amount == 1.0 gives black
- * @li amount == 0.5 results in a color whose luma is halfway between 0.0
- * and that of the original color
- * @li amount == 0.0 gives the original color
- * @li amount == -1.0 gives a color that is 'twice as far from black' as
- * the original color, that is luma(result) == 2*luma(color)
- *
- * @param amount factor by which to adjust the luma component of the color
- * @param chromaGain (optional) factor by which to adjust the chroma
- * component of the color; 1.0 means no change, 0.0 minimizes chroma
- * @see Rainbow::shade
- */
-RAINBOW_EXPORT QColor darken(const QColor &, qreal amount = 0.5, qreal chromaGain = 1.0);
-
-/**
- * Adjust the luma and chroma components of a color. The amount is added
- * to the corresponding component.
- *
- * @param lumaAmount amount by which to adjust the luma component of the
- * color; 0.0 results in no change, -1.0 turns anything black, 1.0 turns
- * anything white
- * @param chromaAmount (optional) amount by which to adjust the chroma
- * component of the color; 0.0 results in no change, -1.0 minimizes chroma,
- * 1.0 maximizes chroma
- * @see Rainbow::luma
- */
-RAINBOW_EXPORT QColor shade(const QColor &, qreal lumaAmount, qreal chromaAmount = 0.0);
-
-/**
- * Create a new color by tinting one color with another. This function is
- * meant for creating additional colors withings the same class (background,
- * foreground) from colors in a different class. Therefore when @p amount
- * is low, the luma of @p base is mostly preserved, while the hue and
- * chroma of @p color is mostly inherited.
- *
- * @param base color to be tinted
- * @param color color with which to tint
- * @param amount how strongly to tint the base; 0.0 gives @p base,
- * 1.0 gives @p color
- */
-RAINBOW_EXPORT QColor tint(const QColor &base, const QColor &color, qreal amount = 0.3);
-
-/**
- * Blend two colors into a new color by linear combination.
- * @code
-	QColor lighter = Rainbow::mix(myColor, Qt::white)
- * @endcode
- * @param c1 first color.
- * @param c2 second color.
- * @param bias weight to be used for the mix. @p bias <= 0 gives @p c1,
- * @p bias >= 1 gives @p c2. @p bias == 0.5 gives a 50% blend of @p c1
- * and @p c2.
- */
-RAINBOW_EXPORT QColor mix(const QColor &c1, const QColor &c2, qreal bias = 0.5);
-
-/**
- * Blend two colors into a new color by painting the second color over the
- * first using the specified composition mode.
- * @code
-	QColor white(Qt::white);
-	white.setAlphaF(0.5);
-	QColor lighter = Rainbow::overlayColors(myColor, white);
-   @endcode
- * @param base the base color (alpha channel is ignored).
- * @param paint the color to be overlayed onto the base color.
- * @param comp the CompositionMode used to do the blending.
- */
-RAINBOW_EXPORT QColor
-overlayColors(const QColor &base, const QColor &paint,
-			  QPainter::CompositionMode comp = QPainter::CompositionMode_SourceOver);
-}