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/**
* \file
* \brief Convenience class for SVG viewBox handling
*//*
* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright (C) 2013 Authors
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*/
#ifndef LIB2GEOM_SEEN_VIEWBOX_H
#define LIB2GEOM_SEEN_VIEWBOX_H
#include <2geom/affine.h>
#include <2geom/rect.h>
namespace Geom {
/** Values for the <align> parameter of preserveAspectRatio.
* See: http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute */
enum Align {
ALIGN_NONE,
ALIGN_XMIN_YMIN,
ALIGN_XMID_YMIN,
ALIGN_XMAX_YMIN,
ALIGN_XMIN_YMID,
ALIGN_XMID_YMID,
ALIGN_XMAX_YMID,
ALIGN_XMIN_YMAX,
ALIGN_XMID_YMAX,
ALIGN_XMAX_YMAX
};
/** Values for the <meetOrSlice> parameter of preserveAspectRatio.
* See: http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute */
enum Expansion {
EXPANSION_MEET,
EXPANSION_SLICE
};
Point align_factors(Align align);
class ViewBox {
OptRect _box;
Align _align;
Expansion _expansion;
public:
explicit ViewBox(OptRect const &r = OptRect(), Align a = ALIGN_XMID_YMID, Expansion ex = EXPANSION_MEET)
: _box(r)
, _align(a)
, _expansion(ex)
{}
void setBox(OptRect const &r) { _box = r; }
void setAlign(Align a) { _align = a; }
void setExpansion(Expansion ex) { _expansion = ex; }
OptRect const &box() const { return _box; }
Align align() const { return _align; }
Expansion expansion() const { return _expansion; }
/** Obtain transformation from the viewbox to the specified viewport. */
Affine transformTo(Geom::Rect const &viewport) const;
};
} // namespace Geom
#endif // !LIB2GEOM_SEEN_VIEWBOX_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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