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