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41 lines
1.6 KiB
C++
41 lines
1.6 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2009 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef SKY_ENGINE_CORE_CSS_CSSHELPER_H_
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#define SKY_ENGINE_CORE_CSS_CSSHELPER_H_
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#include "sky/engine/wtf/Forward.h"
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namespace blink {
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// We always assume 96 CSS pixels in a CSS inch. This is the cold hard truth of the Web.
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// At high DPI, we may scale a CSS pixel, but the ratio of the CSS pixel to the so-called
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// "absolute" CSS length units like inch and pt is always fixed and never changes.
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const double cssPixelsPerInch = 96;
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const double cssPixelsPerCentimeter = cssPixelsPerInch / 2.54; // 2.54 cm/in
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const double cssPixelsPerMillimeter = cssPixelsPerCentimeter / 10;
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const double cssPixelsPerPoint = cssPixelsPerInch / 72;
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const double cssPixelsPerPica = cssPixelsPerInch / 6;
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} // namespace blink
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#endif // SKY_ENGINE_CORE_CSS_CSSHELPER_H_
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