| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef PRINTING_UNITS_H_ |
| #define PRINTING_UNITS_H_ |
| |
| #include "printing/printing_export.h" |
| |
| namespace printing { |
| |
| // Length of an inch in 0.001mm unit. |
| constexpr int kMicronsPerInch = 25400; |
| |
| // Mil is a thousandth of an inch. |
| constexpr float kMicronsPerMil = 25.4f; |
| constexpr int kMilsPerInch = 1000; |
| |
| // Length of an inch in CSS's 1pt unit. |
| // http://dev.w3.org/csswg/css3-values/#absolute-length-units-cm-mm.-in-pt-pc |
| constexpr int kPointsPerInch = 72; |
| |
| // Length of an inch in CSS's 1px unit. |
| // http://dev.w3.org/csswg/css3-values/#the-px-unit |
| constexpr int kPixelsPerInch = 96; |
| |
| // Dpi used to save to PDF or Cloud Print. |
| constexpr int kDefaultPdfDpi = 300; |
| |
| // LETTER: 8.5 x 11 inches |
| constexpr float kLetterWidthInch = 8.5f; |
| constexpr float kLetterHeightInch = 11.0f; |
| |
| // LEGAL: 8.5 x 14 inches |
| constexpr float kLegalWidthInch = 8.5f; |
| constexpr float kLegalHeightInch = 14.0f; |
| |
| // A4: 8.27 x 11.69 inches |
| constexpr float kA4WidthInch = 8.27f; |
| constexpr float kA4HeightInch = 11.69f; |
| |
| // A3: 11.69 x 16.54 inches |
| constexpr float kA3WidthInch = 11.69f; |
| constexpr float kA3HeightInch = 16.54f; |
| |
| // Converts from one unit system to another using integer arithmetics. |
| PRINTING_EXPORT int ConvertUnit(double value, int old_unit, int new_unit); |
| |
| // Converts from one unit system to another using doubles. |
| PRINTING_EXPORT double ConvertUnitDouble(double value, |
| double old_unit, |
| double new_unit); |
| |
| // Converts from 1 pixel to 1 point using integers. |
| PRINTING_EXPORT int ConvertPixelsToPoint(int pixels); |
| |
| // Converts from 1 pixel to 1 point using doubles. |
| PRINTING_EXPORT double ConvertPixelsToPointDouble(double pixels); |
| |
| // Converts from 1 point to 1 pixel using doubles. |
| PRINTING_EXPORT double ConvertPointsToPixelDouble(double points); |
| |
| } // namespace printing |
| |
| #endif // PRINTING_UNITS_H_ |