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