annotate src/video/x11/SDL_x11gl.c @ 450:8a43e0cbf02f

Added SDL_GL_STEREO for stereoscopic OpenGL contexts
author Sam Lantinga <slouken@libsdl.org>
date Mon, 19 Aug 2002 17:58:08 +0000
parents f6ffac90895c
children d6e7d7006062
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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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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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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parents:
diff changeset
162 ? BlackPixel(SDL_Display, SDL_Screen) : 0;
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parents:
diff changeset
163 attributes.background_pixel = black;
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parents:
diff changeset
164 attributes.border_pixel = black;
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parents:
diff changeset
165 attributes.colormap = SDL_XColorMap;
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parents:
diff changeset
166 mask = CWBackPixel | CWBorderPixel | CWColormap;
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parents:
diff changeset
167
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parents:
diff changeset
168 SDL_Window = XCreateWindow(SDL_Display, WMwindow,
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parents:
diff changeset
169 0, 0, w, h, 0, glx_visualinfo->depth,
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parents:
diff changeset
170 InputOutput, glx_visualinfo->visual,
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171 mask, &attributes);
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parents:
diff changeset
172 if ( !SDL_Window ) {
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parents:
diff changeset
173 SDL_SetError("Could not create window");
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parents:
diff changeset
174 return -1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 }
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parents:
diff changeset
176 retval = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 #else
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parents:
diff changeset
178 SDL_SetError("X11 driver not configured with OpenGL");
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parents:
diff changeset
179 retval = -1;
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parents:
diff changeset
180 #endif
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parents:
diff changeset
181 return(retval);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 }
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parents:
diff changeset
183
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parents:
diff changeset
184 int X11_GL_CreateContext(_THIS)
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parents:
diff changeset
185 {
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parents:
diff changeset
186 int retval;
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parents:
diff changeset
187 #ifdef HAVE_OPENGL
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parents:
diff changeset
188 /* We do this to create a clean separation between X and GLX errors. */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 XSync( SDL_Display, False );
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parents:
diff changeset
190 glx_context = this->gl_data->glXCreateContext(GFX_Display,
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parents:
diff changeset
191 glx_visualinfo, NULL, True);
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parents:
diff changeset
192 XSync( GFX_Display, False );
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parents:
diff changeset
193
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parents:
diff changeset
194 if (glx_context == NULL) {
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parents:
diff changeset
195 SDL_SetError("Could not create GL context");
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parents:
diff changeset
196 return -1;
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parents:
diff changeset
197 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198
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parents:
diff changeset
199 gl_active = 1;
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parents:
diff changeset
200 #else
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parents:
diff changeset
201 SDL_SetError("X11 driver not configured with OpenGL");
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 #endif
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 if ( gl_active ) {
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parents:
diff changeset
204 retval = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 } else {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 retval = -1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 return(retval);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 void X11_GL_Shutdown(_THIS)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 #ifdef HAVE_OPENGL
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 /* Clean up OpenGL */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 if( glx_context ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 if (glx_context != NULL)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 this->gl_data->glXDestroyContext(GFX_Display, glx_context);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 if( this->gl_data->glXReleaseBuffersMESA ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 glx_context = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 gl_active = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 #endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 /* Make the current context active */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 int X11_GL_MakeCurrent(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 retval = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 SDL_Window, glx_context) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 SDL_SetError("Unable to make GL context current");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 retval = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 XSync( GFX_Display, False );
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 /* More Voodoo X server workarounds... Grr... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 SDL_Lock_EventThread();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 X11_CheckDGAMouse(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 SDL_Unlock_EventThread();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 /* Get attribute data from glX. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 int glx_attrib = None;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 switch( attrib ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 case SDL_GL_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 glx_attrib = GLX_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 case SDL_GL_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 glx_attrib = GLX_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 case SDL_GL_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 glx_attrib = GLX_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 case SDL_GL_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 glx_attrib = GLX_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 case SDL_GL_DOUBLEBUFFER:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 glx_attrib = GLX_DOUBLEBUFFER;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 case SDL_GL_BUFFER_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 glx_attrib = GLX_BUFFER_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 case SDL_GL_DEPTH_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 glx_attrib = GLX_DEPTH_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 case SDL_GL_STENCIL_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 glx_attrib = GLX_STENCIL_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 case SDL_GL_ACCUM_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 glx_attrib = GLX_ACCUM_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 case SDL_GL_ACCUM_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 glx_attrib = GLX_ACCUM_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 case SDL_GL_ACCUM_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 glx_attrib = GLX_ACCUM_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 case SDL_GL_ACCUM_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 glx_attrib = GLX_ACCUM_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 break;
450
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
296 case SDL_GL_STEREO:
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
297 glx_attrib = GLX_STEREO;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
298 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 return retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 void X11_GL_SwapBuffers(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 #endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 void X11_GL_UnloadLibrary(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 if ( this->gl_config.driver_loaded ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 dlclose(this->gl_config.dll_handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 this->gl_data->glXGetProcAddress = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 this->gl_data->glXChooseVisual = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 this->gl_data->glXCreateContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 this->gl_data->glXDestroyContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 this->gl_data->glXMakeCurrent = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 this->gl_data->glXSwapBuffers = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 this->gl_config.dll_handle = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 this->gl_config.driver_loaded = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 }
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333
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334 #ifdef HAVE_OPENGL
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335
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336 /* Passing a NULL path means load pointers from the application */
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337 int X11_GL_LoadLibrary(_THIS, const char* path)
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338 {
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339 void* handle;
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340 int dlopen_flags;
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341
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342 if ( gl_active ) {
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343 SDL_SetError("OpenGL context already created");
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344 return -1;
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345 }
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346
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347 #ifdef RTLD_GLOBAL
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348 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
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349 #else
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350 dlopen_flags = RTLD_LAZY;
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351 #endif
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352 handle = dlopen(path, dlopen_flags);
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353 /* Catch the case where the application isn't linked with GL */
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354 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) {
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355 dlclose(handle);
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356 path = getenv("SDL_VIDEO_GL_DRIVER");
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357 if ( path == NULL ) {
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358 path = DEFAULT_OPENGL;
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359 }
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360 handle = dlopen(path, dlopen_flags);
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361 }
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362 if ( handle == NULL ) {
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363 SDL_SetError("Could not load OpenGL library");
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364 return -1;
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365 }
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366
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367 /* Unload the old driver and reset the pointers */
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368 X11_GL_UnloadLibrary(this);
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369
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370 /* Load new function pointers */
180
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371 this->gl_data->glXGetProcAddress =
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372 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB");
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373 this->gl_data->glXChooseVisual =
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374 (XVisualInfo *(*)(Display *, int, int *)) dlsym(handle, "glXChooseVisual");
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375 this->gl_data->glXCreateContext =
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376 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) dlsym(handle, "glXCreateContext");
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377 this->gl_data->glXDestroyContext =
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378 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext");
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379 this->gl_data->glXMakeCurrent =
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380 (int (*)(Display *, GLXDrawable, GLXContext)) dlsym(handle, "glXMakeCurrent");
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381 this->gl_data->glXSwapBuffers =
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382 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers");
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383 this->gl_data->glXGetConfig =
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384 (int (*)(Display *, XVisualInfo *, int, int *)) dlsym(handle, "glXGetConfig");
0
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385 /* We don't compare below for this in case we're not using Mesa. */
180
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386 this->gl_data->glXReleaseBuffersMESA =
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387 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" );
0
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388
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389 if ( (this->gl_data->glXChooseVisual == NULL) ||
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390 (this->gl_data->glXCreateContext == NULL) ||
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391 (this->gl_data->glXDestroyContext == NULL) ||
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392 (this->gl_data->glXMakeCurrent == NULL) ||
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393 (this->gl_data->glXSwapBuffers == NULL) ||
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394 (this->gl_data->glXGetConfig == NULL) ) {
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395 SDL_SetError("Could not retrieve OpenGL functions");
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396 return -1;
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397 }
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398
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399 this->gl_config.dll_handle = handle;
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400 this->gl_config.driver_loaded = 1;
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401 if ( path ) {
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402 strncpy(this->gl_config.driver_path, path,
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403 sizeof(this->gl_config.driver_path)-1);
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404 } else {
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405 strcpy(this->gl_config.driver_path, "");
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406 }
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407 return 0;
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408 }
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409
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410 void *X11_GL_GetProcAddress(_THIS, const char* proc)
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411 {
110
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412 static char procname[1024];
0
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413 void* handle;
110
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diff changeset
414 void* retval;
0
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415
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416 handle = this->gl_config.dll_handle;
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417 #if 0 /* This doesn't work correctly yet */
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418 if ( this->gl_data->glXGetProcAddress ) {
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419 void *func, *func2;
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420 func = this->gl_data->glXGetProcAddress(proc);
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421 func2 = dlsym(handle, proc);
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422 if ( func != func2 ) {
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423 fprintf(stderr, "glXGetProcAddress returned %p and dlsym returned %p for %s\n", func, func2, proc);
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424 }
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425 return this->gl_data->glXGetProcAddress(proc);
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diff changeset
426 }
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diff changeset
427 #endif
110
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diff changeset
428 #if defined(__OpenBSD__) && !defined(__ELF__)
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diff changeset
429 #undef dlsym(x,y);
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diff changeset
430 #endif
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diff changeset
431 retval = dlsym(handle, proc);
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diff changeset
432 if (!retval && strlen(proc) <= 1022) {
127
0bcae11eba14 Oops, that wasn't right...
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diff changeset
433 procname[0] = '_';
110
7edee9f0f2cc SDL GL dynamic loading fix for OpenBSD
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diff changeset
434 strcpy(procname + 1, proc);
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diff changeset
435 retval = dlsym(handle, procname);
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diff changeset
436 }
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diff changeset
437 return retval;
0
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438 }
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439
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440 #endif /* HAVE_OPENGL */