1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef PRINTING_UNITS_H_
6#define PRINTING_UNITS_H_
7
8#include "printing/printing_export.h"
9
10namespace printing {
11
12// Length of a thousandth of inches in 0.01mm unit.
13const int kHundrethsMMPerInch = 2540;
14
15// Length of an inch in CSS's 1pt unit.
16// http://dev.w3.org/csswg/css3-values/#absolute-length-units-cm-mm.-in-pt-pc
17const int kPointsPerInch = 72;
18
19// Length of an inch in CSS's 1px unit.
20// http://dev.w3.org/csswg/css3-values/#the-px-unit
21const int kPixelsPerInch = 96;
22
23// Dpi used to save to PDF or Cloud Print.
24const int kDefaultPdfDpi = 300;
25
26// LETTER: 8.5 x 11 inches
27const float kLetterWidthInch = 8.5f;
28const float kLetterHeightInch = 11.0f;
29
30// LEGAL: 8.5 x 14 inches
31const float kLegalWidthInch = 8.5f;
32const float kLegalHeightInch = 14.0f;
33
34// A4: 8.27 x 11.69 inches
35const float kA4WidthInch = 8.27f;
36const float kA4HeightInch = 11.69f;
37
38// A3: 11.69 x 16.54 inches
39const float kA3WidthInch = 11.69f;
40const float kA3HeightInch = 16.54f;
41
42// Converts from one unit system to another using integer arithmetics.
43PRINTING_EXPORT int ConvertUnit(int value, int old_unit, int new_unit);
44
45// Converts from one unit system to another using doubles.
46PRINTING_EXPORT double ConvertUnitDouble(double value, double old_unit,
47                                         double new_unit);
48
49// Converts from 0.001 inch unit to 0.00001 meter.
50PRINTING_EXPORT int ConvertMilliInchToHundredThousanthMeter(int milli_inch);
51
52// Converts from 0.00001 meter unit to 0.001 inch.
53PRINTING_EXPORT int ConvertHundredThousanthMeterToMilliInch(int cmm);
54
55// Converts from 1 pixel to 1 point using integers.
56PRINTING_EXPORT int ConvertPixelsToPoint(int pixels);
57
58// Converts from 1 pixel to 1 point using doubles.
59PRINTING_EXPORT double ConvertPixelsToPointDouble(double pixels);
60
61// Converts from 1 point to 1 pixel using doubles.
62PRINTING_EXPORT double ConvertPointsToPixelDouble(double points);
63
64}  // namespace printing
65
66#endif  // PRINTING_UNITS_H_
67