nr-filter-utils.h

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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_NR_FILTER_UTILS_H
#define SEEN_NR_FILTER_UTILS_H
 
/*
 * Authors:
 *   Jean-Rene Reinhard <jr@komite.net>
 *
 * Copyright (C) 2007 authors
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
namespace Inkscape {
namespace Filters {
 
inline int clamp(int const val) {
    if (val < 0) return 0;
    if (val > 255) return 255;
    return val;
}
 
inline int clamp3(int const val) {
    if (val < 0) return 0;
    if (val > 16581375) return 16581375;
    return val;
}
 
#define CLAMP_D_TO_U8(v) (unsigned char) clamp((int)round((v)))
 
inline int clamp_alpha(int const val, int const alpha) {
    if (val < 0) return 0;
    if (val > alpha) return alpha;
    return val;
}
 
#define CLAMP_D_TO_U8_ALPHA(v,a) (unsigned char) clamp_alpha((int)round((v)),(a))
 
} /* namespace Filters */
} /* namespace Inkscape */
 
#endif /* SEEN_INKSCAPE_NR_FILTER_UTILS_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 :