1 | /*!
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2 | \file og_gamemode.c
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3 | \brief The game mode handling code.
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4 | */
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5 | /*
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6 | * Portions copyright (C) 2004, the OpenGLUT project contributors.
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7 | * OpenGLUT branched from freeglut in February, 2004.
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8 | *
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9 | * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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10 | * Written by Pawel W. Olszta, <olszta@sourceforge.net>
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11 | * Creation date: Thu Dec 16 1999
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12 | *
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13 | * Permission is hereby granted, free of charge, to any person obtaining a
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14 | * copy of this software and associated documentation files (the "Software"),
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15 | * to deal in the Software without restriction, including without limitation
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16 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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17 | * and/or sell copies of the Software, and to permit persons to whom the
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18 | * Software is furnished to do so, subject to the following conditions:
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19 | *
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20 | * The above copyright notice and this permission notice shall be included
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21 | * in all copies or substantial portions of the Software.
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22 | *
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23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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24 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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25 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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26 | * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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27 | * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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28 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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29 | */
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30 |
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31 | #ifdef HAVE_CONFIG_H
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32 | #include "config.h"
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33 | #endif
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34 |
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35 | #include <GL/openglut.h>
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36 | #include "og_internal.h"
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37 |
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38 | /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
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39 |
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40 | /*
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41 | * Remembers the current visual settings, so that
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42 | * we can change them and restore later...
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43 | */
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44 | static void oghRememberState( void )
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45 | {
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46 | #if TARGET_HOST_UNIX_X11
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47 |
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48 | /*
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49 | * This highly depends on the XFree86 extensions,
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50 | * not approved as X Consortium standards
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51 | */
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52 | # ifdef X_XF86VidModeGetModeLine
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53 |
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54 |
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55 | /*
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56 | * Remember the current ViewPort location of the screen to be able to
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57 | * restore the ViewPort on LeaveGameMode():
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58 | */
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59 | XF86VidModeGetViewPort(
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60 | ogDisplay.Display,
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61 | ogDisplay.Screen,
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62 | &ogDisplay.DisplayViewPortX,
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63 | &ogDisplay.DisplayViewPortY
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64 | );
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65 |
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66 | /*
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67 | * Remember the current pointer location before going fullscreen
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68 | * for restoring it later:
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69 | */
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70 | {
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71 | Window junk_window;
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72 | unsigned int mask;
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73 |
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74 | XQueryPointer(
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75 | ogDisplay.Display, ogDisplay.RootWindow,
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76 | &junk_window, &junk_window,
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77 | &ogDisplay.DisplayPointerX, &ogDisplay.DisplayPointerY,
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78 | &ogDisplay.DisplayPointerX, &ogDisplay.DisplayPointerY, &mask
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79 | );
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80 | }
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81 |
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82 | /*
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83 | * Query the current display settings:
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84 | */
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85 | ogDisplay.DisplayModeValid =
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86 | XF86VidModeGetModeLine(
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87 | ogDisplay.Display,
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88 | ogDisplay.Screen,
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89 | &ogDisplay.DisplayModeClock,
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90 | &ogDisplay.DisplayMode
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91 | );
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92 |
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93 | if( !ogDisplay.DisplayModeValid )
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94 | ogWarning( "Runtime use of XF86VidModeGetModeLine failed." );
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95 |
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96 | # else
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97 | /*
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98 | * XXX warning oghRememberState: missing XFree86 video mode extensions,
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99 | * XXX game mode will not change screen resolution when activated
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100 | */
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101 | # endif
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102 |
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103 | #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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104 |
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105 | /* DEVMODE devMode; */
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106 |
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107 | /*
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108 | * Grab the current desktop settings...
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109 | */
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110 |
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111 | /* hack to get around my stupid cross-gcc headers */
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112 | # define FREEGLUT_ENUM_CURRENT_SETTINGS -1
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113 |
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114 | EnumDisplaySettings( NULL, FREEGLUT_ENUM_CURRENT_SETTINGS,
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115 | &ogDisplay.DisplayMode );
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116 |
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117 | /*
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118 | * Make sure we will be restoring all settings needed
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119 | */
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120 | ogDisplay.DisplayMode.dmFields |=
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121 | DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY;
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122 |
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123 | #endif
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124 | }
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125 |
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126 | /*
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127 | * Restores the previously remembered visual settings
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128 | */
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129 | static void oghRestoreState( void )
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130 | {
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131 | #if TARGET_HOST_UNIX_X11
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132 |
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133 | # ifdef X_XF86VidModeGetAllModeLines
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134 | /*
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135 | * Restore the remembered pointer position:
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136 | */
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137 | XWarpPointer(
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138 | ogDisplay.Display, None, ogDisplay.RootWindow, 0, 0, 0, 0,
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139 | ogDisplay.DisplayPointerX, ogDisplay.DisplayPointerY
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140 | );
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141 |
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142 | /*
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143 | * This highly depends on the XFree86 extensions,
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144 | * not approved as X Consortium standards
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145 | */
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146 |
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147 | if( ogDisplay.DisplayModeValid )
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148 | {
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149 | XF86VidModeModeInfo** displayModes;
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150 | int i, displayModesCount;
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151 |
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152 | XF86VidModeGetAllModeLines(
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153 | ogDisplay.Display,
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154 | ogDisplay.Screen,
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155 | &displayModesCount,
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156 | &displayModes
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157 | );
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158 |
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159 | /*
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160 | * Check every of the modes looking for one that matches our demands.
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161 | * If we find one, switch to it and restore the remembered viewport.
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162 | */
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163 | for( i = 0; i < displayModesCount; i++ )
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164 | if(displayModes[ i ]->hdisplay == ogDisplay.DisplayMode.hdisplay &&
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165 | displayModes[ i ]->vdisplay == ogDisplay.DisplayMode.vdisplay &&
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166 | displayModes[ i ]->dotclock == ogDisplay.DisplayModeClock )
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167 | {
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168 | XF86VidModeSwitchToMode(
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169 | ogDisplay.Display,
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170 | ogDisplay.Screen,
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171 | displayModes[ i ]
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172 | );
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173 | XF86VidModeSetViewPort(
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174 | ogDisplay.Display,
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175 | ogDisplay.Screen,
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176 | ogDisplay.DisplayViewPortX,
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177 | ogDisplay.DisplayViewPortY
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178 | );
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179 |
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180 | /*
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181 | * For the case this would be the last X11 call the application
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182 | * calls exit() we've to flush the X11 output queue to have the
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183 | * commands sent to the X server before the application exits.
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184 | */
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185 | XFlush( ogDisplay.Display );
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186 |
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187 | return;
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188 | }
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189 | }
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190 |
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191 | # else
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192 | /*
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193 | * XXX warning oghRestoreState: missing XFree86 video mode extensions,
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194 | * XXX game mode will not change screen resolution when activated
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195 | */
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196 | # endif
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197 |
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198 | #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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199 |
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200 | /*
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201 | * Restore the previously rememebered desktop display settings
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202 | */
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203 | ChangeDisplaySettings( &ogDisplay.DisplayMode, 0 );
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204 |
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205 | #endif
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206 | }
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207 |
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208 | /*
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209 | * On UNIX_X11, the following function is only referenced if we have
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210 | * the {X_F86VidModeGetAllModeLins} symbol defined from XFree86.
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211 | * Since it is a {static} function, we must protect it by #ifdef
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212 | * to protect against warnings.
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213 | */
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214 | #if defined( X_XF86VidModeGetAllModeLines ) || !TARGET_HOST_UNIX_X11
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215 | /*
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216 | * Checks the display mode settings against user's preferences
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217 | */
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218 | static GLboolean oghCheckDisplayMode(
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219 | int width, int height, int depth, int refresh
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220 | )
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221 | {
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222 | /*
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223 | * The desired values should be stored in ogState structure...
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224 | */
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225 | return ( width == ogState.GameModeSize.X ) &&
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226 | ( height == ogState.GameModeSize.Y ) &&
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227 | ( depth == ogState.GameModeDepth ) &&
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228 | (refresh == ogState.GameModeRefresh );
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229 | }
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230 | #endif
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231 |
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232 | /*
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233 | * Changes the current display mode to match user's settings
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234 | */
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235 | static GLboolean oghChangeDisplayMode( GLboolean haveToTest )
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236 | {
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237 | #if TARGET_HOST_UNIX_X11
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238 |
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239 | /*
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240 | * This highly depends on the XFree86 extensions,
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241 | * not approved as X Consortium standards
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242 | */
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243 | # ifdef X_XF86VidModeGetAllModeLines
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244 |
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245 | /*
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246 | * This is also used by applcations which check modes by calling
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247 | * glutGameModeGet(GLUT_GAME_MODE_POSSIBLE), so allow the check:
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248 | */
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249 | if( haveToTest || ogDisplay.DisplayModeValid )
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250 | {
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251 | XF86VidModeModeInfo** displayModes;
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252 | int i, displayModesCount;
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253 |
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254 | XF86VidModeGetAllModeLines(
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255 | ogDisplay.Display,
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256 | ogDisplay.Screen,
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257 | &displayModesCount,
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258 | &displayModes
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259 | );
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260 |
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261 | /*
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262 | * Check every of the modes looking for one that matches our demands
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263 | */
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264 | for( i = 0; i < displayModesCount; i++ )
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265 | if( oghCheckDisplayMode(
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266 | displayModes[ i ]->hdisplay,
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267 | displayModes[ i ]->vdisplay,
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268 | ogState.GameModeDepth,
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269 | ogState.GameModeRefresh
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270 | ) )
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271 | {
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272 | if( haveToTest )
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273 | return GL_TRUE;
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274 | /*
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275 | * OK, this is the display mode we have been looking for...
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276 | */
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277 | XF86VidModeSwitchToMode(
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278 | ogDisplay.Display,
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279 | ogDisplay.Screen,
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280 | displayModes[ i ]
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281 | );
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282 | return GL_TRUE;
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283 | }
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284 | }
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285 |
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286 | /*
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287 | * Something must have went wrong
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288 | */
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289 | return GL_FALSE;
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290 |
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291 | # else
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292 | /*
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293 | * XXX warning oghChangeDisplayMode: missing XFree86 video mode extensions,
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294 | * XXX game mode will not change screen resolution when activated
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295 | * XXX
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296 | * XXX For compatibility with Solaris, et al, we simply lie and
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297 | * XXX claim to succeed. (^& This lets us use game mode for
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298 | * XXX focus-grabbing.
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299 | */
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300 | return GL_TRUE;
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301 | # endif
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302 |
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303 | #elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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304 |
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305 | unsigned int displayModes = 0, mode = 0xffffffff;
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306 | GLboolean success = GL_FALSE;
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307 | /* HDC desktopDC; */
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308 | DEVMODE devMode;
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309 |
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310 | /*
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311 | * Enumerate the available display modes
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312 | * Try to get a complete match
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313 | */
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314 | while( EnumDisplaySettings( NULL, displayModes, &devMode ) )
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315 | {
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316 | /*
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317 | * Does the enumerated display mode match the user's preferences?
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318 | */
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319 | if( oghCheckDisplayMode(
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320 | devMode.dmPelsWidth, devMode.dmPelsHeight,
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321 | devMode.dmBitsPerPel, devMode.dmDisplayFrequency
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322 | ) )
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323 | {
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324 | mode = displayModes;
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325 | break;
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326 | }
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327 | displayModes++;
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328 | }
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329 |
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330 | if( mode == 0xffffffff )
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331 | {
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332 | /* then try without Display Frequency */
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333 | displayModes = 0;
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334 |
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335 | /*
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336 | * Enumerate the available display modes
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337 | */
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338 | while( EnumDisplaySettings( NULL, displayModes, &devMode ) )
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339 | {
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340 | /* then try without Display Frequency */
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341 | if( oghCheckDisplayMode( devMode.dmPelsWidth,
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342 | devMode.dmPelsHeight,
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343 | devMode.dmBitsPerPel,
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344 | ogState.GameModeRefresh ) )
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345 | {
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346 | mode = displayModes;
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347 | break;
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348 | }
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349 | displayModes++;
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350 | }
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351 | }
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352 |
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353 | /*
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354 | * Did we find a matching display mode?
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355 | */
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356 | if( mode != 0xffffffff )
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357 | {
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358 | int retVal = DISP_CHANGE_SUCCESSFUL;
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359 |
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360 | /*
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361 | * Mark the values we want to modify in the display change call
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362 | */
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363 | devMode.dmFields |=
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364 | DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY;
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365 |
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366 | retVal = ChangeDisplaySettings( &devMode, haveToTest ? CDS_TEST : 0 );
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367 |
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368 | /*
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369 | * I don't know if it's really needed, but looks nice:
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370 | */
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371 | success = (retVal == DISP_CHANGE_SUCCESSFUL) ||
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372 | (retVal == DISP_CHANGE_NOTUPDATED);
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373 |
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374 | if( !haveToTest && success )
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375 | {
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376 | ogState.GameModeSize.X = devMode.dmPelsWidth;
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377 | ogState.GameModeSize.Y = devMode.dmPelsHeight;
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378 | ogState.GameModeDepth = devMode.dmBitsPerPel;
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379 | ogState.GameModeRefresh = devMode.dmDisplayFrequency;
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380 | }
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381 | }
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382 |
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383 | return success;
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384 |
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385 | #endif
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386 | }
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387 |
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388 |
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389 | /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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390 |
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391 | /*!
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392 | \fn
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393 | \brief Set the game mode display string
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394 | \ingroup gamemode
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395 | \param string A configuration parameter as a string.
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396 |
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397 | Sets the gamemode status according to an undocumented string.
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398 |
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399 | Glancing at old GLUT 3.7, the freeglut codebase that we
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400 | inherited does not implement more than a single
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401 | GLUT gamemode ``criteria''. It may not even do that
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402 | much correctly.
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403 |
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404 | In principle, this code lets you set the video dimensions,
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405 | rendering depth, and video refresh rate. In practice,
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406 | the combination that you request may be unsupportable
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407 | and the target host may even refuse to honor any such
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408 | changes.
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409 |
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410 | If you use this function but do not set all options,
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411 | the following defaults may be substituted for some
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412 | values:
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413 |
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414 | - \a width 640
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415 | - \a height 480
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416 | - \a depth 16
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417 | - \a refresh 72
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418 |
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419 | \todo Documentation
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420 | \see glutGameModeString(), glutEnterGameMode(), glutLeaveGameMode(),
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421 | glutGameModeGet()
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422 | */
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423 | void OGAPIENTRY glutGameModeString( const char *string )
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424 | {
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425 | int width = 640, height = 480, depth = 16, refresh = 72;
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426 |
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427 | /*
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428 | * This one seems a bit easier than glutInitDisplayString. The bad thing
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429 | * about it that I was unable to find the game mode string definition, so
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430 | * that I assumed it is: "[width]x[height]:[depth]@[refresh rate]", which
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431 | * appears in all GLUT game mode programs I have seen to date.
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432 | */
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433 | if( sscanf( string, "%ix%i:%i@%i", &width, &height, &depth, &refresh ) !=
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434 | 4 )
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435 | if( sscanf( string, "%ix%i:%i", &width, &height, &depth ) != 3 )
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436 | if( sscanf( string, "%ix%i@%i", &width, &height, &refresh ) != 3 )
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437 | if( sscanf( string, "%ix%i", &width, &height ) != 2 )
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438 | if( sscanf( string, ":%i@%i", &depth, &refresh ) != 2 )
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439 | if( sscanf( string, ":%i", &depth ) != 1 )
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440 | if( sscanf( string, "@%i", &refresh ) != 1 )
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441 | ogWarning(
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442 | "Unable to parse game mode string `%s'.",
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443 | string
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444 | );
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445 |
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446 | /*
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447 | * Hopefully it worked, and if not, we still have the default values
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448 | */
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449 | ogState.GameModeSize.X = width;
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450 | ogState.GameModeSize.Y = height;
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451 | ogState.GameModeDepth = depth;
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452 | ogState.GameModeRefresh = refresh;
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453 | }
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454 |
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455 | /*!
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456 | \fn
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457 | \brief Enter game mode
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458 | \ingroup gamemode
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459 |
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460 | Any combination of the following may apply:
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461 |
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462 | - Resolution change, possibly to the requested
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463 | resolution, possibly to a "nearest match".
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464 | - Refresh frequency change.
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465 | - A window with a drawable area equal to the requested
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466 | screen resolution will be opened.
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467 | - The mouse may be restricted to operate within
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468 | your window.
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469 |
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470 | \note Varies in behavior; X users can disable the resolution
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471 | change by an OpenGLUT compile-time option.
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472 | \todo Documentation
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473 | \todo OpenGLUT may be unable to restore the original settings
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474 | (this has been observed on WIN32).
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475 |
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476 | \see glutGameModeString(), glutEnterGameMode(), glutLeaveGameMode(),
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477 | glutGameModeGet()
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478 | */
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479 | int OGAPIENTRY glutEnterGameMode( void )
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480 | {
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481 | if( ogStructure.GameMode )
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482 | ogAddToWindowDestroyList( ogStructure.GameMode );
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483 | else
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484 | oghRememberState( );
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485 |
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486 | if( ! oghChangeDisplayMode( GL_FALSE ) )
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487 | {
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488 | ogWarning( "Failed to change screen settings." );
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489 | return FALSE;
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490 | }
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491 |
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492 | ogStructure.GameMode = ogCreateWindow(
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493 | NULL, "OpenGLUT", 0, 0,
|
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494 | ogState.GameModeSize.X, ogState.GameModeSize.Y, OG_CW_GAMEMODE
|
---|
495 | );
|
---|
496 |
|
---|
497 | ogStructure.GameMode->State.IsGameMode = GL_TRUE;
|
---|
498 | ogStructure.GameMode->State.NeedToResize = GL_TRUE;
|
---|
499 | ogStructure.GameMode->State.Width = ogState.GameModeSize.X;
|
---|
500 | ogStructure.GameMode->State.Height = ogState.GameModeSize.Y;
|
---|
501 |
|
---|
502 | #if TARGET_HOST_UNIX_X11
|
---|
503 |
|
---|
504 | /* Move the window up to the topleft corner */
|
---|
505 | XMoveWindow( ogDisplay.Display, ogStructure.Window->Window.Handle, 0, 0 );
|
---|
506 |
|
---|
507 | /*
|
---|
508 | * Sync needed to avoid a real race, the Xserver must have really created
|
---|
509 | * the window before we can grab the pointer into it:
|
---|
510 | */
|
---|
511 | XSync( ogDisplay.Display, False );
|
---|
512 |
|
---|
513 | /* Move the Pointer to the middle of the fullscreen window */
|
---|
514 | XWarpPointer(
|
---|
515 | ogDisplay.Display,
|
---|
516 | None,
|
---|
517 | ogDisplay.RootWindow,
|
---|
518 | 0, 0, 0, 0,
|
---|
519 | ogState.GameModeSize.X/2, ogState.GameModeSize.Y/2
|
---|
520 | );
|
---|
521 |
|
---|
522 | /*
|
---|
523 | * Grab the pointer to confine it into the window after the calls to
|
---|
524 | * XWrapPointer() which ensure that the pointer really enters the window.
|
---|
525 | *
|
---|
526 | * We also need to wait here until XGrabPointer() returns GrabSuccess,
|
---|
527 | * otherwise the new window is not viewable yet and if the next function
|
---|
528 | * (XSetInputFocus) is called with a not yet viewable window, it will exit
|
---|
529 | * the application which we have to aviod, so wait until it's viewable:
|
---|
530 | */
|
---|
531 | while( GrabSuccess != XGrabPointer(
|
---|
532 | ogDisplay.Display, ogStructure.GameMode->Window.Handle,
|
---|
533 | TRUE,
|
---|
534 | ButtonPressMask | ButtonReleaseMask | ButtonMotionMask
|
---|
535 | | PointerMotionMask,
|
---|
536 | GrabModeAsync, GrabModeAsync,
|
---|
537 | ogStructure.GameMode->Window.Handle, None, CurrentTime
|
---|
538 | ) )
|
---|
539 | usleep( 100 );
|
---|
540 |
|
---|
541 | /*
|
---|
542 | * Change input focus to the new window. This will exit the application
|
---|
543 | * if the new window is not viewable yet, see the XGrabPointer loop above.
|
---|
544 | */
|
---|
545 | XSetInputFocus(
|
---|
546 | ogDisplay.Display,
|
---|
547 | ogStructure.GameMode->Window.Handle,
|
---|
548 | RevertToNone,
|
---|
549 | CurrentTime
|
---|
550 | );
|
---|
551 |
|
---|
552 | # ifdef X_XF86VidModeSetViewPort
|
---|
553 |
|
---|
554 | if( ogDisplay.DisplayModeValid )
|
---|
555 | {
|
---|
556 | int x, y;
|
---|
557 | Window child;
|
---|
558 |
|
---|
559 | /* Change to viewport to the window topleft edge: */
|
---|
560 | XF86VidModeSetViewPort( ogDisplay.Display, ogDisplay.Screen, 0, 0 );
|
---|
561 |
|
---|
562 | /*
|
---|
563 | * Final window repositioning: It could be avoided using an undecorated
|
---|
564 | * window using override_redirect, but this * would possily require
|
---|
565 | * more changes and investigation.
|
---|
566 | */
|
---|
567 |
|
---|
568 | /* Get the current postion of the drawable area on screen */
|
---|
569 | XTranslateCoordinates(
|
---|
570 | ogDisplay.Display,
|
---|
571 | ogStructure.Window->Window.Handle,
|
---|
572 | ogDisplay.RootWindow,
|
---|
573 | 0, 0, &x, &y,
|
---|
574 | &child
|
---|
575 | );
|
---|
576 |
|
---|
577 | /* Move the decorataions out of the topleft corner of the display */
|
---|
578 | XMoveWindow( ogDisplay.Display, ogStructure.Window->Window.Handle,
|
---|
579 | -x, -y);
|
---|
580 | }
|
---|
581 |
|
---|
582 | #endif
|
---|
583 |
|
---|
584 | /* Grab the keyboard, too */
|
---|
585 | XGrabKeyboard(
|
---|
586 | ogDisplay.Display,
|
---|
587 | ogStructure.GameMode->Window.Handle,
|
---|
588 | FALSE,
|
---|
589 | GrabModeAsync, GrabModeAsync,
|
---|
590 | CurrentTime
|
---|
591 | );
|
---|
592 |
|
---|
593 | #endif
|
---|
594 |
|
---|
595 | return TRUE;
|
---|
596 | }
|
---|
597 |
|
---|
598 | /*!
|
---|
599 | \fn
|
---|
600 | \brief Leave game mode, returning to normal desktop mode
|
---|
601 | \ingroup gamemode
|
---|
602 |
|
---|
603 | \todo Documentation
|
---|
604 | \see glutGameModeString(), glutEnterGameMode(), glutLeaveGameMode(),
|
---|
605 | glutGameModeGet()
|
---|
606 | */
|
---|
607 |
|
---|
608 | void OGAPIENTRY glutLeaveGameMode( void )
|
---|
609 | {
|
---|
610 | if( ogStructure.GameMode )
|
---|
611 | {
|
---|
612 | ogStructure.GameMode->State.IsGameMode = GL_FALSE;
|
---|
613 | ogAddToWindowDestroyList( ogStructure.GameMode );
|
---|
614 | ogStructure.GameMode = NULL;
|
---|
615 | #if TARGET_HOST_UNIX_X11
|
---|
616 | XUngrabPointer( ogDisplay.Display, CurrentTime );
|
---|
617 | XUngrabKeyboard( ogDisplay.Display, CurrentTime );
|
---|
618 | #endif
|
---|
619 | oghRestoreState();
|
---|
620 | }
|
---|
621 | }
|
---|
622 |
|
---|
623 | /*!
|
---|
624 | \fn
|
---|
625 | \brief Return the value of a game mode parameter
|
---|
626 | \ingroup gamemode
|
---|
627 | \param pname The parameter value to be returned
|
---|
628 |
|
---|
629 | \a pname is one of:
|
---|
630 |
|
---|
631 | - \a GLUT_GAME_MODE_ACTIVE \n
|
---|
632 | Return non-zero if we are presently in gamemode.
|
---|
633 |
|
---|
634 | - \a GLUT_GAME_MODE_POSSIBLE \n
|
---|
635 | Return whether the requested gamemode settings are viable.
|
---|
636 | (May also actually change the mode?) Does not necessarily
|
---|
637 | tell you whether entering gamemode will have any effect.
|
---|
638 |
|
---|
639 | - \a GLUT_GAME_MODE_WIDTH \n
|
---|
640 | Return the game mode width. (in pixels)
|
---|
641 |
|
---|
642 | - \a GLUT_GAME_MODE_HEIGHT \n
|
---|
643 | Return the game mode height. (in pixels)
|
---|
644 |
|
---|
645 | - \a GLUT_GAME_MODE_PIXEL_DEPTH \n
|
---|
646 | Return the game mode pixel depth. (in bits)
|
---|
647 |
|
---|
648 | - \a GLUT_GAME_MODE_REFRESH_RATE \n
|
---|
649 | Return the game mode vertical refresh frequency. (in Hz)
|
---|
650 |
|
---|
651 | - \a GLUT_GAME_MODE_DISPLAY_CHANGED \n
|
---|
652 | Return non-zero if we are presently in gamemode.
|
---|
653 | (Same as \a GLUT_GAME_MODE_ACTIVE.)
|
---|
654 |
|
---|
655 | If \a pname is unknown, a warning is printed and a value of
|
---|
656 | -1 is returned.
|
---|
657 |
|
---|
658 | \todo Documentation
|
---|
659 | \todo OpenGLUT intrepretation of GLUT_GAME_MODE_DISPLAY_CHANGED
|
---|
660 | \see glutGameModeString(), glutEnterGameMode(), glutLeaveGameMode(),
|
---|
661 | glutGameModeGet()
|
---|
662 | */
|
---|
663 |
|
---|
664 | int OGAPIENTRY glutGameModeGet( GLenum pname )
|
---|
665 | {
|
---|
666 | int ret = -1;
|
---|
667 |
|
---|
668 | switch( pname )
|
---|
669 | {
|
---|
670 | case GLUT_GAME_MODE_ACTIVE:
|
---|
671 | ret = !!ogStructure.GameMode;
|
---|
672 | break;
|
---|
673 |
|
---|
674 | case GLUT_GAME_MODE_POSSIBLE:
|
---|
675 | ret = oghChangeDisplayMode( GL_TRUE );
|
---|
676 | break;
|
---|
677 |
|
---|
678 | case GLUT_GAME_MODE_WIDTH:
|
---|
679 | ret = ogState.GameModeSize.X;
|
---|
680 | break;
|
---|
681 |
|
---|
682 | case GLUT_GAME_MODE_HEIGHT:
|
---|
683 | ret = ogState.GameModeSize.Y;
|
---|
684 | break;
|
---|
685 |
|
---|
686 | case GLUT_GAME_MODE_PIXEL_DEPTH:
|
---|
687 | ret = ogState.GameModeDepth;
|
---|
688 | break;
|
---|
689 |
|
---|
690 | case GLUT_GAME_MODE_REFRESH_RATE:
|
---|
691 | ret = ogState.GameModeRefresh;
|
---|
692 | break;
|
---|
693 |
|
---|
694 | case GLUT_GAME_MODE_DISPLAY_CHANGED:
|
---|
695 | /* This is true if the game mode has been activated successfully. */
|
---|
696 | ret = !!ogStructure.GameMode;
|
---|
697 | break;
|
---|
698 |
|
---|
699 | default:
|
---|
700 | ogWarning( "Unknown gamemode get: %d", pname );
|
---|
701 | break;
|
---|
702 | }
|
---|
703 |
|
---|
704 | return ret;
|
---|
705 | }
|
---|