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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_DISPLAY_GRAYSCALE_H
#define SEEN_DISPLAY_GRAYSCALE_H
/*
* Author:
* Johan Engelen <goejendaagh@zonnet.nl>
*
* Copyright (C) 2011 Author
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
typedef unsigned int guint32;
/**
* Provide methods to calculate grayscale values (e.g. convert rgba value to grayscale rgba value).
*/
namespace Grayscale {
guint32 process(guint32 rgba);
guint32 process(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
unsigned char luminance(unsigned char r, unsigned char g, unsigned char b);
};
#endif // !SEEN_DISPLAY_GRAYSCALE_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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