1 | /* |
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2 | * libcaca ASCII-Art library |
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3 | * Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * This library is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the Do What The Fuck You Want To |
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8 | * Public License, Version 2, as published by Sam Hocevar. See |
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9 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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10 | */ |
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11 | |
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12 | /** \file caca.c |
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13 | * \version \$Id: caca.c 593 2006-03-13 17:49:04Z sam $ |
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14 | * \author Sam Hocevar <sam@zoy.org> |
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15 | * \brief Main \e libcaca functions |
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16 | * |
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17 | * This file contains the main functions used by \e libcaca applications to |
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18 | * initialise the library, get the screen properties, set the framerate and |
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19 | * so on. |
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20 | */ |
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21 | |
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22 | #include "config.h" |
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23 | |
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24 | #if !defined(__KERNEL__) |
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25 | # include <stdlib.h> |
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26 | # include <string.h> |
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27 | #endif |
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28 | |
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29 | #include "cucul.h" |
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30 | #include "cucul_internals.h" |
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31 | #include "caca.h" |
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32 | #include "caca_internals.h" |
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33 | |
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34 | static int caca_init_driver(caca_t *kk); |
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35 | |
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36 | /** \brief Attach a caca graphical context to a cucul backend context. |
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37 | * |
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38 | * Create a graphical context using device-dependent features (ncurses for |
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39 | * terminals, an X11 window, a DOS command window...) that attaches to a |
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40 | * libcucul canvas. Everything that gets drawn in the libcucul canvas can |
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41 | * then be displayed by the libcaca driver. |
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42 | * |
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43 | * \param qq The cucul backend context. |
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44 | * \return The caca graphical context or NULL if an error occurred. |
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45 | */ |
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46 | caca_t * caca_attach(cucul_t * qq) |
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47 | { |
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48 | caca_t *kk = malloc(sizeof(caca_t)); |
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49 | |
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50 | kk->qq = qq; |
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51 | |
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52 | if(caca_init_driver(kk)) |
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53 | { |
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54 | free(kk); |
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55 | return NULL; |
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56 | } |
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57 | |
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58 | if(kk->drv.init_graphics(kk)) |
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59 | { |
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60 | free(kk); |
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61 | return NULL; |
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62 | } |
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63 | |
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64 | /* Attached! */ |
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65 | kk->qq->refcount++; |
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66 | |
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67 | /* Graphics stuff */ |
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68 | kk->delay = 0; |
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69 | kk->rendertime = 0; |
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70 | |
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71 | /* Events stuff */ |
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72 | #if defined(USE_SLANG) || defined(USE_NCURSES) |
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73 | kk->events.key_timer.last_sec = 0; |
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74 | kk->events.key_timer.last_usec = 0; |
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75 | kk->events.last_key_ticks = 0; |
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76 | kk->events.autorepeat_ticks = 0; |
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77 | kk->events.last_key = 0; |
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78 | #endif |
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79 | #if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO) |
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80 | kk->events.queue = 0; |
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81 | #endif |
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82 | |
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83 | kk->timer.last_sec = 0; |
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84 | kk->timer.last_usec = 0; |
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85 | kk->lastticks = 0; |
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86 | |
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87 | /* Mouse position */ |
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88 | kk->mouse.x = kk->qq->width / 2; |
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89 | kk->mouse.y = kk->qq->height / 2; |
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90 | |
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91 | /* Resize events */ |
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92 | kk->resize.resized = 0; |
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93 | |
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94 | return kk; |
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95 | } |
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96 | |
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97 | /** \brief Detach a caca graphical context from a cucul backend context. |
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98 | * |
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99 | * Detach a graphical context from its cucul backend and destroy it. The |
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100 | * libcucul canvas continues to exist and other graphical contexts can be |
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101 | * attached to it afterwards. |
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102 | * |
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103 | * \param qq The caca graphical context. |
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104 | */ |
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105 | void caca_detach(caca_t *kk) |
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106 | { |
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107 | kk->drv.end_graphics(kk); |
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108 | kk->qq->refcount--; |
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109 | free(kk); |
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110 | } |
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111 | |
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112 | /* |
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113 | * XXX: The following functions are local. |
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114 | */ |
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115 | |
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116 | static int caca_init_driver(caca_t *kk) |
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117 | { |
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118 | #if defined(HAVE_GETENV) && defined(HAVE_STRCASECMP) |
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119 | char *var = getenv("CACA_DRIVER"); |
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120 | |
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121 | /* If the environment variable was set, use it */ |
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122 | if(var && *var) |
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123 | { |
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124 | #if defined(USE_WIN32) |
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125 | if(!strcasecmp(var, "win32")) |
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126 | win32_init_driver(kk); |
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127 | else |
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128 | #endif |
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129 | #if defined(USE_CONIO) |
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130 | if(!strcasecmp(var, "conio")) |
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131 | conio_init_driver(kk); |
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132 | else |
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133 | #endif |
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134 | #if defined(USE_X11) |
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135 | if(!strcasecmp(var, "x11")) |
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136 | x11_init_driver(kk); |
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137 | else |
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138 | #endif |
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139 | #if defined(USE_GL) |
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140 | if(!strcasecmp(var, "gl")) |
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141 | gl_init_driver(kk); |
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142 | else |
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143 | #endif |
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144 | #if defined(USE_SLANG) |
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145 | if(!strcasecmp(var, "slang")) |
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146 | slang_init_driver(kk); |
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147 | else |
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148 | #endif |
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149 | #if defined(USE_NCURSES) |
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150 | if(!strcasecmp(var, "ncurses")) |
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151 | ncurses_init_driver(kk); |
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152 | else |
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153 | #endif |
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154 | #if defined(USE_NETWORK) |
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155 | if(!strcasecmp(var, "network")) |
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156 | network_init_driver(kk); |
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157 | else |
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158 | #endif |
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159 | #if defined(USE_VGA) |
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160 | if(!strcasecmp(var, "vga")) |
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161 | vga_init_driver(kk); |
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162 | else |
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163 | #endif |
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164 | return -1; |
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165 | |
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166 | return 0; |
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167 | } |
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168 | #endif |
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169 | |
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170 | #if defined(USE_WIN32) |
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171 | win32_init_driver(kk); |
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172 | return 0; |
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173 | #endif |
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174 | #if defined(USE_CONIO) |
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175 | conio_init_driver(kk); |
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176 | return 0; |
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177 | #endif |
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178 | #if defined(USE_VGA) |
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179 | vga_init_driver(kk); |
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180 | return 0; |
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181 | #endif |
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182 | #if defined(USE_X11) |
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183 | #if defined(HAVE_GETENV) |
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184 | if(getenv("DISPLAY") && *(getenv("DISPLAY"))) |
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185 | #endif |
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186 | { |
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187 | x11_init_driver(kk); |
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188 | return 0; |
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189 | } |
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190 | #endif |
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191 | #if defined(USE_GL) |
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192 | #if defined(HAVE_GETENV) && defined(GLUT_XLIB_IMPLEMENTATION) |
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193 | if(getenv("DISPLAY") && *(getenv("DISPLAY"))) |
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194 | #endif |
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195 | { |
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196 | gl_init_driver(kk); |
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197 | return 0; |
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198 | } |
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199 | #endif |
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200 | #if defined(USE_SLANG) |
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201 | slang_init_driver(kk); |
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202 | return 0; |
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203 | #endif |
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204 | #if defined(USE_NCURSES) |
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205 | slang_init_driver(kk); |
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206 | return 0; |
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207 | #endif |
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208 | #if defined(USE_NETWORK) |
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209 | network_init_driver(kk); |
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210 | return 0; |
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211 | #endif |
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212 | |
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213 | return -1; |
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214 | } |
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215 | |
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