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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "printing/units.h" | 5 #include "printing/units.h" |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "printing/print_job_constants.h" |
8 | 9 |
9 namespace printing { | 10 namespace printing { |
10 | 11 |
11 int ConvertUnit(int value, int old_unit, int new_unit) { | 12 int ConvertUnit(int value, int old_unit, int new_unit) { |
12 DCHECK_GT(new_unit, 0); | 13 DCHECK_GT(new_unit, 0); |
13 DCHECK_GT(old_unit, 0); | 14 DCHECK_GT(old_unit, 0); |
14 // With integer arithmetic, to divide a value with correct rounding, you need | 15 // With integer arithmetic, to divide a value with correct rounding, you need |
15 // to add half of the divisor value to the dividend value. You need to do the | 16 // to add half of the divisor value to the dividend value. You need to do the |
16 // reverse with negative number. | 17 // reverse with negative number. |
17 if (value >= 0) { | 18 if (value >= 0) { |
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40 } | 41 } |
41 | 42 |
42 int ConvertPixelsToPoint(int pixels) { | 43 int ConvertPixelsToPoint(int pixels) { |
43 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); | 44 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); |
44 } | 45 } |
45 | 46 |
46 double ConvertPixelsToPointDouble(double pixels) { | 47 double ConvertPixelsToPointDouble(double pixels) { |
47 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); | 48 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); |
48 } | 49 } |
49 | 50 |
| 51 double ConvertPointsToPixelDouble(double points) { |
| 52 return ConvertUnitDouble(points, kPointsPerInch, kPixelsPerInch); |
| 53 } |
| 54 |
| 55 double GetSegmentWidth(double page_width) { |
| 56 // Interstice is left at both ends of the page as well as between |
| 57 // each region, so 1 is added. |
| 58 double total_interstice_width = |
| 59 (printing::kSettingHeaderFooterHorizontalRegions + 1) * |
| 60 printing::kSettingHeaderFooterInterstice; |
| 61 return (page_width - total_interstice_width) / |
| 62 printing::kSettingHeaderFooterHorizontalRegions; |
| 63 } |
| 64 |
50 } // namespace printing | 65 } // namespace printing |
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