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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" | |
9 | 8 |
10 namespace printing { | 9 namespace printing { |
11 | 10 |
12 int ConvertUnit(int value, int old_unit, int new_unit) { | 11 int ConvertUnit(int value, int old_unit, int new_unit) { |
13 DCHECK_GT(new_unit, 0); | 12 DCHECK_GT(new_unit, 0); |
14 DCHECK_GT(old_unit, 0); | 13 DCHECK_GT(old_unit, 0); |
15 // With integer arithmetic, to divide a value with correct rounding, you need | 14 // With integer arithmetic, to divide a value with correct rounding, you need |
16 // to add half of the divisor value to the dividend value. You need to do the | 15 // to add half of the divisor value to the dividend value. You need to do the |
17 // reverse with negative number. | 16 // reverse with negative number. |
18 if (value >= 0) { | 17 if (value >= 0) { |
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41 } | 40 } |
42 | 41 |
43 int ConvertPixelsToPoint(int pixels) { | 42 int ConvertPixelsToPoint(int pixels) { |
44 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); | 43 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); |
45 } | 44 } |
46 | 45 |
47 double ConvertPixelsToPointDouble(double pixels) { | 46 double ConvertPixelsToPointDouble(double pixels) { |
48 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); | 47 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); |
49 } | 48 } |
50 | 49 |
51 double ConvertPointsToPixelDouble(double points) { | |
52 return ConvertUnitDouble(points, kPointsPerInch, kPixelsPerInch); | |
53 } | |
54 | |
55 double GetHeaderFooterSegmentWidth(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 | |
65 } // namespace printing | 50 } // namespace printing |
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