annotate src/video/x11/SDL_x11gl.c @ 643:564716cfb502

Removed direct dependency on OpenGL (call current_video->glGetString() instead of glGetString() directly)...otherwise we'd have to explicitly link to a libGL. --ryan.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 01 Jul 2003 16:35:54 +0000
parents b0108e9dea53
children 0f2029a70548
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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f6ffac90895c Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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e8157fcb3114 Updated the source with the correct e-mail address
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdlib.h> /* For getenv() prototype */
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29 #include <string.h>
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30
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31 #include "SDL_events_c.h"
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32 #include "SDL_error.h"
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33 #include "SDL_x11video.h"
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34 #include "SDL_x11dga_c.h"
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35 #include "SDL_x11gl_c.h"
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36
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37 #define DEFAULT_OPENGL "libGL.so.1"
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38
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39 /* return the preferred visual to use for openGL graphics */
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40 XVisualInfo *X11_GL_GetVisual(_THIS)
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41 {
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42 #ifdef HAVE_OPENGL
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43 /* 64 seems nice. */
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44 int attribs[64];
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45 int i;
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46
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47 /* load the gl driver from a default path */
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48 if ( ! this->gl_config.driver_loaded ) {
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49 /* no driver has been loaded, use default (ourselves) */
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50 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
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51 return NULL;
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52 }
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53 }
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54
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55 /* See if we already have a window which we must use */
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56 if ( SDL_windowid ) {
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57 XWindowAttributes a;
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58 XVisualInfo vi_in;
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59 int out_count;
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60
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61 XGetWindowAttributes(SDL_Display, SDL_Window, &a);
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62 vi_in.screen = SDL_Screen;
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63 vi_in.visualid = XVisualIDFromVisual(a.visual);
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64 glx_visualinfo = XGetVisualInfo(SDL_Display,
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65 VisualScreenMask|VisualIDMask, &vi_in, &out_count);
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66 return glx_visualinfo;
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67 }
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68
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69 /* Setup our GLX attributes according to the gl_config. */
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70 i = 0;
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71 attribs[i++] = GLX_RGBA;
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72 attribs[i++] = GLX_RED_SIZE;
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73 attribs[i++] = this->gl_config.red_size;
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74 attribs[i++] = GLX_GREEN_SIZE;
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75 attribs[i++] = this->gl_config.green_size;
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76 attribs[i++] = GLX_BLUE_SIZE;
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77 attribs[i++] = this->gl_config.blue_size;
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78
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79 if( this->gl_config.alpha_size ) {
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80 attribs[i++] = GLX_ALPHA_SIZE;
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81 attribs[i++] = this->gl_config.alpha_size;
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82 }
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83
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84 if( this->gl_config.buffer_size ) {
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85 attribs[i++] = GLX_BUFFER_SIZE;
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86 attribs[i++] = this->gl_config.buffer_size;
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87 }
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88
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89 if( this->gl_config.double_buffer ) {
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90 attribs[i++] = GLX_DOUBLEBUFFER;
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91 }
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92
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93 attribs[i++] = GLX_DEPTH_SIZE;
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94 attribs[i++] = this->gl_config.depth_size;
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95
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96 if( this->gl_config.stencil_size ) {
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97 attribs[i++] = GLX_STENCIL_SIZE;
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98 attribs[i++] = this->gl_config.stencil_size;
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99 }
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100
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101 if( this->gl_config.accum_red_size ) {
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102 attribs[i++] = GLX_ACCUM_RED_SIZE;
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103 attribs[i++] = this->gl_config.accum_red_size;
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104 }
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105
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106 if( this->gl_config.accum_green_size ) {
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107 attribs[i++] = GLX_ACCUM_GREEN_SIZE;
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108 attribs[i++] = this->gl_config.accum_green_size;
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109 }
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110
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111 if( this->gl_config.accum_blue_size ) {
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112 attribs[i++] = GLX_ACCUM_BLUE_SIZE;
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113 attribs[i++] = this->gl_config.accum_blue_size;
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114 }
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115
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116 if( this->gl_config.accum_alpha_size ) {
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117 attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
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118 attribs[i++] = this->gl_config.accum_alpha_size;
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119 }
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120
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121 if( this->gl_config.stereo ) {
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122 attribs[i++] = GLX_STEREO;
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123 attribs[i++] = this->gl_config.stereo;
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124 }
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125
0
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126 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */
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127 attribs[i++] = GLX_X_VISUAL_TYPE;
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128 attribs[i++] = GLX_DIRECT_COLOR;
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129 #endif
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130 attribs[i++] = None;
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131
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132 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
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133 SDL_Screen, attribs);
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134 #ifdef GLX_DIRECT_COLOR
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135 if( !glx_visualinfo ) { /* No DirectColor visual? Try again.. */
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136 attribs[i-3] = None;
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137 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
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138 SDL_Screen, attribs);
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139 }
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140 #endif
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141 if( !glx_visualinfo ) {
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142 SDL_SetError( "Couldn't find matching GLX visual");
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143 return NULL;
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144 }
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145 return glx_visualinfo;
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146 #else
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147 SDL_SetError("X11 driver not configured with OpenGL");
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148 return NULL;
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149 #endif
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150 }
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151
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152 int X11_GL_CreateWindow(_THIS, int w, int h)
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153 {
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154 int retval;
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155 #ifdef HAVE_OPENGL
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156 XSetWindowAttributes attributes;
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157 unsigned long mask;
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158 unsigned long black;
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159
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160 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display,
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161 SDL_Screen))
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162 ? BlackPixel(SDL_Display, SDL_Screen) : 0;
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163 attributes.background_pixel = black;
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164 attributes.border_pixel = black;
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165 attributes.colormap = SDL_XColorMap;
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166 mask = CWBackPixel | CWBorderPixel | CWColormap;
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167
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168 SDL_Window = XCreateWindow(SDL_Display, WMwindow,
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169 0, 0, w, h, 0, glx_visualinfo->depth,
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170 InputOutput, glx_visualinfo->visual,
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171 mask, &attributes);
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172 if ( !SDL_Window ) {
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173 SDL_SetError("Could not create window");
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174 return -1;
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175 }
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176 retval = 0;
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177 #else
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178 SDL_SetError("X11 driver not configured with OpenGL");
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179 retval = -1;
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180 #endif
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181 return(retval);
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182 }
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183
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184 int X11_GL_CreateContext(_THIS)
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185 {
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186 int retval;
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187 #ifdef HAVE_OPENGL
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188 /* We do this to create a clean separation between X and GLX errors. */
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189 XSync( SDL_Display, False );
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190 glx_context = this->gl_data->glXCreateContext(GFX_Display,
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191 glx_visualinfo, NULL, True);
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192 XSync( GFX_Display, False );
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193
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194 if (glx_context == NULL) {
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195 SDL_SetError("Could not create GL context");
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196 return -1;
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197 }
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198
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199 gl_active = 1;
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200 #else
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201 SDL_SetError("X11 driver not configured with OpenGL");
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202 #endif
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203 if ( gl_active ) {
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204 retval = 0;
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205 } else {
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206 retval = -1;
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207 }
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208 return(retval);
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209 }
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210
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211 void X11_GL_Shutdown(_THIS)
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212 {
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213 #ifdef HAVE_OPENGL
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214 /* Clean up OpenGL */
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215 if( glx_context ) {
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216 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL);
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217
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218 if (glx_context != NULL)
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219 this->gl_data->glXDestroyContext(GFX_Display, glx_context);
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220
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221 if( this->gl_data->glXReleaseBuffersMESA ) {
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222 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window);
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223 }
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224 glx_context = NULL;
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225 }
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226 gl_active = 0;
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227 #endif /* HAVE_OPENGL */
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228 }
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229
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230 #ifdef HAVE_OPENGL
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231
638
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232 static int ExtensionSupported(const char *extension, const char *all_extensions)
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233 {
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234 const GLubyte *extensions = NULL;
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235 const GLubyte *start;
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236 GLubyte *where, *terminator;
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237
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238 /* Extension names should not have spaces. */
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239 where = (GLubyte *) strchr(extension, ' ');
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240 if (where || *extension == '\0')
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241 return 0;
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242
643
564716cfb502 Removed direct dependency on OpenGL (call current_video->glGetString() instead
Ryan C. Gordon <icculus@icculus.org>
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243 extensions = current_video->glGetString(GL_EXTENSIONS);
638
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244 /* It takes a bit of care to be fool-proof about parsing the
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245 * OpenGL extensions string. Don't be fooled by sub-strings,
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246 * etc. */
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247
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248 start = extensions;
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249
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250 for (;;)
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diff changeset
251 {
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252 where = (GLubyte *) strstr((const char *) start, extension);
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253 if (!where) break;
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254
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255 terminator = where + strlen(extension);
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diff changeset
256 if (where == start || *(where - 1) == ' ')
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257 if (*terminator == ' ' || *terminator == '\0') return 1;
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258
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259 start = terminator;
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260 }
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diff changeset
261
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diff changeset
262 return 0;
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diff changeset
263 }
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diff changeset
264
0
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265 /* Make the current context active */
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diff changeset
266 int X11_GL_MakeCurrent(_THIS)
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diff changeset
267 {
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268 int retval;
638
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diff changeset
269 const char *glx_extensions;
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270
0
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271 retval = 0;
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272 if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
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273 SDL_Window, glx_context) ) {
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diff changeset
274 SDL_SetError("Unable to make GL context current");
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275 retval = -1;
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276 }
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277 XSync( GFX_Display, False );
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278
638
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diff changeset
279
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diff changeset
280 /*
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281 * The context is now current, check for glXReleaseBuffersMESA()
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282 * extension. If extension is _not_ supported, destroy the pointer
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283 * (to make sure it will not be called in X11_GL_Shutdown() ).
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284 *
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285 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so,
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286 * but there's no need to call it (is is only needed for some old
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
287 * non-DRI drivers).
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diff changeset
288 *
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diff changeset
289 * When using for example glew (http://glew.sf.net), dlsym() for
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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290 * glXReleaseBuffersMESA() returns the pointer from the glew library
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diff changeset
291 * (namespace conflict).
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diff changeset
292 *
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293 * The glXReleaseBuffersMESA() pointer in the glew is NULL, if the
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
294 * driver doesn't support this extension. So blindly calling it will
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diff changeset
295 * cause segfault with DRI/Mesa drivers!
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diff changeset
296 *
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diff changeset
297 */
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diff changeset
298
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diff changeset
299 glx_extensions = this->gl_data->glXQueryExtensionsString(GFX_Display, SDL_Screen);
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300 if (!ExtensionSupported("glXReleaseBuffersMESA", glx_extensions)) this->gl_data->glXReleaseBuffersMESA = NULL;
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diff changeset
301
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diff changeset
302
0
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diff changeset
303 /* More Voodoo X server workarounds... Grr... */
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diff changeset
304 SDL_Lock_EventThread();
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parents:
diff changeset
305 X11_CheckDGAMouse(this);
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parents:
diff changeset
306 SDL_Unlock_EventThread();
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parents:
diff changeset
307
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diff changeset
308 return(retval);
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diff changeset
309 }
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diff changeset
310
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parents:
diff changeset
311 /* Get attribute data from glX. */
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parents:
diff changeset
312 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
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diff changeset
313 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 int glx_attrib = None;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 switch( attrib ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 case SDL_GL_RED_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 glx_attrib = GLX_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 case SDL_GL_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 glx_attrib = GLX_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 case SDL_GL_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 glx_attrib = GLX_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 case SDL_GL_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 glx_attrib = GLX_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 case SDL_GL_DOUBLEBUFFER:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 glx_attrib = GLX_DOUBLEBUFFER;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 case SDL_GL_BUFFER_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 glx_attrib = GLX_BUFFER_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 case SDL_GL_DEPTH_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 glx_attrib = GLX_DEPTH_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 case SDL_GL_STENCIL_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 glx_attrib = GLX_STENCIL_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 case SDL_GL_ACCUM_RED_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 glx_attrib = GLX_ACCUM_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 case SDL_GL_ACCUM_GREEN_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 glx_attrib = GLX_ACCUM_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 case SDL_GL_ACCUM_BLUE_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 glx_attrib = GLX_ACCUM_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 case SDL_GL_ACCUM_ALPHA_SIZE:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 glx_attrib = GLX_ACCUM_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 break;
450
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
354 case SDL_GL_STEREO:
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
355 glx_attrib = GLX_STEREO;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
356 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 return retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 void X11_GL_SwapBuffers(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 #endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 void X11_GL_UnloadLibrary(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 if ( this->gl_config.driver_loaded ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 dlclose(this->gl_config.dll_handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 this->gl_data->glXGetProcAddress = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 this->gl_data->glXChooseVisual = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 this->gl_data->glXCreateContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 this->gl_data->glXDestroyContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 this->gl_data->glXMakeCurrent = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 this->gl_data->glXSwapBuffers = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 this->gl_config.dll_handle = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 this->gl_config.driver_loaded = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 /* Passing a NULL path means load pointers from the application */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 int X11_GL_LoadLibrary(_THIS, const char* path)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 void* handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 int dlopen_flags;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 if ( gl_active ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 SDL_SetError("OpenGL context already created");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 #ifdef RTLD_GLOBAL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 dlopen_flags = RTLD_LAZY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 handle = dlopen(path, dlopen_flags);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 /* Catch the case where the application isn't linked with GL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 dlclose(handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 path = getenv("SDL_VIDEO_GL_DRIVER");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 if ( path == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 path = DEFAULT_OPENGL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 handle = dlopen(path, dlopen_flags);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 if ( handle == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 SDL_SetError("Could not load OpenGL library");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 /* Unload the old driver and reset the pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 X11_GL_UnloadLibrary(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 /* Load new function pointers */
180
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
429 this->gl_data->glXGetProcAddress =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
430 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
431 this->gl_data->glXChooseVisual =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
432 (XVisualInfo *(*)(Display *, int, int *)) dlsym(handle, "glXChooseVisual");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
433 this->gl_data->glXCreateContext =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
434 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) dlsym(handle, "glXCreateContext");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
435 this->gl_data->glXDestroyContext =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
436 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
437 this->gl_data->glXMakeCurrent =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
438 (int (*)(Display *, GLXDrawable, GLXContext)) dlsym(handle, "glXMakeCurrent");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
439 this->gl_data->glXSwapBuffers =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
440 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
441 this->gl_data->glXGetConfig =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
442 (int (*)(Display *, XVisualInfo *, int, int *)) dlsym(handle, "glXGetConfig");
638
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
443 this->gl_data->glXQueryExtensionsString =
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
444 (const char (*)(Display *, int)) dlsym(handle, "glXQueryExtensionsString");
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
445
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 /* We don't compare below for this in case we're not using Mesa. */
180
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
447 this->gl_data->glXReleaseBuffersMESA =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
448 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" );
638
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
449
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
450
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 if ( (this->gl_data->glXChooseVisual == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 (this->gl_data->glXCreateContext == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 (this->gl_data->glXDestroyContext == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 (this->gl_data->glXMakeCurrent == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 (this->gl_data->glXSwapBuffers == NULL) ||
638
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
456 (this->gl_data->glXGetConfig == NULL) ||
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
457 (this->gl_data->glXQueryExtensionsString == NULL)) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 SDL_SetError("Could not retrieve OpenGL functions");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 this->gl_config.dll_handle = handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 this->gl_config.driver_loaded = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 if ( path ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 strncpy(this->gl_config.driver_path, path,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 sizeof(this->gl_config.driver_path)-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 strcpy(this->gl_config.driver_path, "");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 void *X11_GL_GetProcAddress(_THIS, const char* proc)
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474 {
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475 static char procname[1024];
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476 void* handle;
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477 void* retval;
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478
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479 handle = this->gl_config.dll_handle;
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480 if ( this->gl_data->glXGetProcAddress ) {
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481 return this->gl_data->glXGetProcAddress(proc);
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482 }
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483 #if defined(__OpenBSD__) && !defined(__ELF__)
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484 #undef dlsym(x,y);
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485 #endif
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486 retval = dlsym(handle, proc);
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487 if (!retval && strlen(proc) <= 1022) {
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488 procname[0] = '_';
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489 strcpy(procname + 1, proc);
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490 retval = dlsym(handle, procname);
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491 }
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492 return retval;
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493 }
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494
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495 #endif /* HAVE_OPENGL */