Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 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 thousanth 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 | // Converts from one unit system to another using integer arithmetics. |
| 24 | PRINTING_EXPORT int ConvertUnit(int value, int old_unit, int new_unit); |
| 25 | |
| 26 | // Converts from one unit system to another using doubles. |
| 27 | PRINTING_EXPORT double ConvertUnitDouble(double value, double old_unit, |
| 28 | double new_unit); |
| 29 | |
| 30 | // Converts from 0.001 inch unit to 0.00001 meter. |
| 31 | PRINTING_EXPORT int ConvertMilliInchToHundredThousanthMeter(int milli_inch); |
| 32 | |
| 33 | // Converts from 0.00001 meter unit to 0.001 inch. |
| 34 | PRINTING_EXPORT int ConvertHundredThousanthMeterToMilliInch(int cmm); |
| 35 | |
| 36 | // Converts from 1 pixel to 1 point using integers. |
| 37 | PRINTING_EXPORT int ConvertPixelsToPoint(int pixels); |
| 38 | |
| 39 | // Converts from 1 pixel to 1 point using doubles. |
| 40 | PRINTING_EXPORT double ConvertPixelsToPointDouble(double pixels); |
| 41 | |
| 42 | // Converts from 1 point to 1 pixel using doubles. |
| 43 | double ConvertPointsToPixelDouble(double points); |
| 44 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 45 | } // namespace printing |
| 46 | |
| 47 | #endif // PRINTING_UNITS_H_ |