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 10 namespace printing { 11 12 // Length of a thousandth of inches in 0.01mm unit. 13 const 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 17 const 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 21 const int kPixelsPerInch = 96; 22 23 // Dpi used to save to PDF or Cloud Print. 24 const int kDefaultPdfDpi = 300; 25 26 // LETTER: 8.5 x 11 inches 27 const float kLetterWidthInch = 8.5f; 28 const float kLetterHeightInch = 11.0f; 29 30 // LEGAL: 8.5 x 14 inches 31 const float kLegalWidthInch = 8.5f; 32 const float kLegalHeightInch = 14.0f; 33 34 // A4: 8.27 x 11.69 inches 35 const float kA4WidthInch = 8.27f; 36 const float kA4HeightInch = 11.69f; 37 38 // A3: 11.69 x 16.54 inches 39 const float kA3WidthInch = 11.69f; 40 const float kA3HeightInch = 16.54f; 41 42 // Converts from one unit system to another using integer arithmetics. 43 PRINTING_EXPORT int ConvertUnit(int value, int old_unit, int new_unit); 44 45 // Converts from one unit system to another using doubles. 46 PRINTING_EXPORT double ConvertUnitDouble(double value, double old_unit, 47 double new_unit); 48 49 // Converts from 0.001 inch unit to 0.00001 meter. 50 PRINTING_EXPORT int ConvertMilliInchToHundredThousanthMeter(int milli_inch); 51 52 // Converts from 0.00001 meter unit to 0.001 inch. 53 PRINTING_EXPORT int ConvertHundredThousanthMeterToMilliInch(int cmm); 54 55 // Converts from 1 pixel to 1 point using integers. 56 PRINTING_EXPORT int ConvertPixelsToPoint(int pixels); 57 58 // Converts from 1 pixel to 1 point using doubles. 59 PRINTING_EXPORT double ConvertPixelsToPointDouble(double pixels); 60 61 // Converts from 1 point to 1 pixel using doubles. 62 double ConvertPointsToPixelDouble(double points); 63 64 } // namespace printing 65 66 #endif // PRINTING_UNITS_H_ 67
