Mercurial > octave
annotate src/display.h @ 8561:66165de2cc42
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author | John W. Eaton <jwe@octave.org> |
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date | Wed, 21 Jan 2009 21:48:24 -0500 |
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1 /* |
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2 |
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3 Copyright (C) 2009 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_display_h) |
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24 #define octave_display_h 1 |
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25 |
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26 class Matrix; |
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27 |
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28 class display_info |
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29 { |
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30 protected: |
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31 |
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32 display_info (void) |
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33 : ht (1), wd (1), dp (0), rx (72), ry (72) |
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34 { |
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35 init (); |
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36 } |
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37 |
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38 public: |
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39 |
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40 static int height (void) |
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41 { |
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42 return instance_ok () ? instance->do_height () : 0; |
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43 } |
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44 |
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45 static int width (void) |
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46 { |
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47 return instance_ok () ? instance->do_width () : 0; |
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48 } |
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49 |
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50 static int depth (void) |
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51 { |
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52 return instance_ok () ? instance->do_depth () : 0; |
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53 } |
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54 |
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55 static double x_dpi (void) |
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56 { |
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57 return instance_ok () ? instance->do_x_dpi () : 0; |
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58 } |
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59 |
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60 static double y_dpi (void) |
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61 { |
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62 return instance_ok () ? instance->do_y_dpi () : 0; |
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63 } |
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64 |
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65 private: |
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66 |
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67 static display_info *instance; |
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68 |
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69 // Height, width, and depth of the display. |
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70 int ht; |
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71 int wd; |
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72 int dp; |
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73 |
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74 // X- and Y- Resolution of the display in dots (pixels) per inch. |
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75 double rx; |
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76 double ry; |
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77 |
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78 int do_height (void) const { return ht; } |
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79 int do_width (void) const { return wd; } |
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80 int do_depth (void) const { return dp; } |
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81 |
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82 double do_x_dpi (void) const { return rx; } |
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83 double do_y_dpi (void) const { return ry; } |
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84 |
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85 void init (void); |
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86 |
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87 static bool instance_ok (void); |
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88 }; |
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89 |
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90 #endif |
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91 |
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92 /* |
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93 ;;; Local Variables: *** |
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94 ;;; mode: C++ *** |
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95 ;;; End: *** |
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96 */ |