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display.cc: get info for windows and os x systems
author John W. Eaton <jwe@octave.org>
date Thu, 22 Jan 2009 13:10:20 -0500
parents 66165de2cc42
children 4b6558abe675
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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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <cstdlib>
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28
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29 #if defined (OCTAVE_USE_WINDOWS_API)
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30 #include <Windows.h>
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31 #elif defined (OCTAVE_USE_OS_X_API)
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32 #include <CGDirectDisplay.h>
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33 #include <CGDisplayConfiguration.h>
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34 #elif defined (HAVE_X_WINDOWS)
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35 #include <X11/Xlib.h>
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36 #endif
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37
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38
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39
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40 #include "display.h"
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41 #include "error.h"
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42
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43 display_info *display_info::instance = 0;
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44
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45 void
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46 display_info::init (void)
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47 {
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48 #if defined (OCTAVE_USE_WINDOWS_API)
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49
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50 HDC hdc = GetDC (0);
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51
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52 if (hdc)
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53 {
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54 dp = GetDeviceCaps (hdc, BITSPIXEL)
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55
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56 ht = GetDeviceCaps (hdc, VERTRES);
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57 wd = GetDeviceCaps (hdc, HORZRES);
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58
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59 double ht_mm = GetDeviceCaps (hdc, VERTSIZE);
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60 double wd_mm = GetDeviceCaps (hdc, HORZSIZE);
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61
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62 rx = wd * 25.4 / wd_mm;
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63 ry = ht * 25.4 / ht_mm;
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64 }
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65 else
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66 warning ("no graphical display found");
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67
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68 #elif defined (OCTAVE_USE_OS_X_API)
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69
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70 CGDirectDisplayID display = CGMainDisplayID ();
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71
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72 if (display)
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73 {
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74 dp = CGDisplayBitsPerPixel (display);
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75
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76 ht = CGDisplayPixelsHigh (display);
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77 wd = CGDisplayPixelsWide (display);
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78
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79 CGSize sz_mm = CGDisplayScreenSize (display);
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80
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81 CGFloat ht_mm = sz_mm.height;
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82 CGFloat wd_mm = sz_mm.width;
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83
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84 rx = wd * 25.4 / wd_mm;
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85 ry = ht * 25.4 / ht_mm;
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86
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87 std::cerr << depth << " bit depth" << std::endl;
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88 }
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89 else
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90 warning ("no graphical display found");
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91
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92 #elif defined (HAVE_X_WINDOWS)
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93
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94 const char *display_name = getenv ("DISPLAY");
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95
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96 if (display_name && *display_name)
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97 {
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98 Display *display = XOpenDisplay (display_name);
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99
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100 if (display)
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101 {
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102 Screen *screen = DefaultScreenOfDisplay (display);
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103
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104 if (screen)
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105 {
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106 dp = DefaultDepthOfScreen (screen);
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107
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108 ht = HeightOfScreen (screen);
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109 wd = WidthOfScreen (screen);
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110
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111 int screen_number = XScreenNumberOfScreen (screen);
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112
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113 double ht_mm = DisplayHeightMM (display, screen_number);
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114 double wd_mm = DisplayWidthMM (display, screen_number);
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115
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116 rx = wd * 25.4 / wd_mm;
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117 ry = ht * 25.4 / ht_mm;
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118 }
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119 else
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120 warning ("X11 display has no default screen");
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121 }
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122 else
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123 warning ("unable to open X11 DISPLAY");
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124 }
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125 else
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126 warning ("X11 DISPLAY environment variable not set");
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127 #else
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128
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129 warning ("no graphical display found");
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130
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131 #endif
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132 }
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133
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134 bool
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135 display_info::instance_ok (void)
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136 {
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137 bool retval = true;
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138
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139 if (! instance)
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140 instance = new display_info ();
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141
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142 if (! instance)
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143 {
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144 ::error ("unable to create display_info object!");
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145
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146 retval = false;
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147 }
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148
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149 return retval;
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150 }
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151
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152 /*
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153 ;;; Local Variables: ***
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154 ;;; mode: C++ ***
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155 ;;; End: ***
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156 */