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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 "chrome/common/print_messages.h" |
| 9 #include "printing/print_job_constants.h" |
8 | 10 |
9 namespace printing { | 11 namespace printing { |
10 | 12 |
11 int ConvertUnit(int value, int old_unit, int new_unit) { | 13 int ConvertUnit(int value, int old_unit, int new_unit) { |
12 DCHECK_GT(new_unit, 0); | 14 DCHECK_GT(new_unit, 0); |
13 DCHECK_GT(old_unit, 0); | 15 DCHECK_GT(old_unit, 0); |
14 // With integer arithmetic, to divide a value with correct rounding, you need | 16 // 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 | 17 // to add half of the divisor value to the dividend value. You need to do the |
16 // reverse with negative number. | 18 // reverse with negative number. |
17 if (value >= 0) { | 19 if (value >= 0) { |
(...skipping 22 matching lines...) Expand all Loading... |
40 } | 42 } |
41 | 43 |
42 int ConvertPixelsToPoint(int pixels) { | 44 int ConvertPixelsToPoint(int pixels) { |
43 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); | 45 return ConvertUnit(pixels, kPixelsPerInch, kPointsPerInch); |
44 } | 46 } |
45 | 47 |
46 double ConvertPixelsToPointDouble(double pixels) { | 48 double ConvertPixelsToPointDouble(double pixels) { |
47 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); | 49 return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch); |
48 } | 50 } |
49 | 51 |
| 52 double ConvertPointsToPixelDouble(double points) { |
| 53 return ConvertUnitDouble(points, kPointsPerInch, kPixelsPerInch); |
| 54 } |
| 55 |
| 56 double GetSegmentWidth(double page_width) { |
| 57 // Interstice is left at both ends of the page as well as between |
| 58 // each region, so 1 is added. |
| 59 double total_interstice_width = |
| 60 (printing::kSettingHeaderFooterHorizontalRegions + 1) * |
| 61 printing::kSettingHeaderFooterInterstice; |
| 62 return (page_width - total_interstice_width) / |
| 63 printing::kSettingHeaderFooterHorizontalRegions; |
| 64 } |
| 65 |
| 66 int GetDPI(const PrintMsg_Print_Params* print_params) { |
| 67 #if defined(OS_MACOSX) |
| 68 // On the Mac, the printable area is in points, don't do any scaling based |
| 69 // on dpi. |
| 70 return printing::kPointsPerInch; |
| 71 #else |
| 72 return static_cast<int>(print_params->dpi); |
| 73 #endif // defined(OS_MACOSX) |
| 74 } |
| 75 |
50 } // namespace printing | 76 } // namespace printing |
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