annotate src/video/x11/SDL_x11gl.c @ 667:adbed8d7a991

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author Sam Lantinga <slouken@libsdl.org>
date Wed, 06 Aug 2003 21:54:32 +0000
parents 864e2d2a9a55
children b8d311d90021
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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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 #ifndef GLX_ARB_multisample
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40 #define GLX_ARB_multisample
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41 #define GLX_SAMPLE_BUFFERS_ARB 100000
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42 #define GLX_SAMPLES_ARB 100001
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43 #endif
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44
0
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45 /* return the preferred visual to use for openGL graphics */
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46 XVisualInfo *X11_GL_GetVisual(_THIS)
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47 {
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48 #ifdef HAVE_OPENGL
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49 /* 64 seems nice. */
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50 int attribs[64];
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51 int i;
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52
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53 /* load the gl driver from a default path */
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54 if ( ! this->gl_config.driver_loaded ) {
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55 /* no driver has been loaded, use default (ourselves) */
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56 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
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57 return NULL;
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58 }
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59 }
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60
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61 /* See if we already have a window which we must use */
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62 if ( SDL_windowid ) {
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63 XWindowAttributes a;
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64 XVisualInfo vi_in;
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65 int out_count;
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66
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67 XGetWindowAttributes(SDL_Display, SDL_Window, &a);
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68 vi_in.screen = SDL_Screen;
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69 vi_in.visualid = XVisualIDFromVisual(a.visual);
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70 glx_visualinfo = XGetVisualInfo(SDL_Display,
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71 VisualScreenMask|VisualIDMask, &vi_in, &out_count);
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72 return glx_visualinfo;
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73 }
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74
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75 /* Setup our GLX attributes according to the gl_config. */
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76 i = 0;
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77 attribs[i++] = GLX_RGBA;
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78 attribs[i++] = GLX_RED_SIZE;
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79 attribs[i++] = this->gl_config.red_size;
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80 attribs[i++] = GLX_GREEN_SIZE;
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81 attribs[i++] = this->gl_config.green_size;
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82 attribs[i++] = GLX_BLUE_SIZE;
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83 attribs[i++] = this->gl_config.blue_size;
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84
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85 if( this->gl_config.alpha_size ) {
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86 attribs[i++] = GLX_ALPHA_SIZE;
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87 attribs[i++] = this->gl_config.alpha_size;
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88 }
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89
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90 if( this->gl_config.buffer_size ) {
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91 attribs[i++] = GLX_BUFFER_SIZE;
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92 attribs[i++] = this->gl_config.buffer_size;
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93 }
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94
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95 if( this->gl_config.double_buffer ) {
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96 attribs[i++] = GLX_DOUBLEBUFFER;
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97 }
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98
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99 attribs[i++] = GLX_DEPTH_SIZE;
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100 attribs[i++] = this->gl_config.depth_size;
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101
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102 if( this->gl_config.stencil_size ) {
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103 attribs[i++] = GLX_STENCIL_SIZE;
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104 attribs[i++] = this->gl_config.stencil_size;
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105 }
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106
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107 if( this->gl_config.accum_red_size ) {
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108 attribs[i++] = GLX_ACCUM_RED_SIZE;
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109 attribs[i++] = this->gl_config.accum_red_size;
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110 }
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111
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112 if( this->gl_config.accum_green_size ) {
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113 attribs[i++] = GLX_ACCUM_GREEN_SIZE;
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114 attribs[i++] = this->gl_config.accum_green_size;
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115 }
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116
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117 if( this->gl_config.accum_blue_size ) {
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118 attribs[i++] = GLX_ACCUM_BLUE_SIZE;
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119 attribs[i++] = this->gl_config.accum_blue_size;
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120 }
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121
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122 if( this->gl_config.accum_alpha_size ) {
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123 attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
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124 attribs[i++] = this->gl_config.accum_alpha_size;
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125 }
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126
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127 if( this->gl_config.stereo ) {
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128 attribs[i++] = GLX_STEREO;
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129 attribs[i++] = this->gl_config.stereo;
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130 }
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131
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132 if( this->gl_config.multisamplebuffers ) {
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133 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
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134 attribs[i++] = this->gl_config.multisamplebuffers;
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135 }
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136
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137 if( this->gl_config.multisamplesamples ) {
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138 attribs[i++] = GLX_SAMPLES_ARB;
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139 attribs[i++] = this->gl_config.multisamplesamples;
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140 }
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141
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142 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */
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143 attribs[i++] = GLX_X_VISUAL_TYPE;
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144 attribs[i++] = GLX_DIRECT_COLOR;
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145 #endif
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146 attribs[i++] = None;
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147
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148 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
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149 SDL_Screen, attribs);
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150 #ifdef GLX_DIRECT_COLOR
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151 if( !glx_visualinfo ) { /* No DirectColor visual? Try again.. */
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152 attribs[i-3] = None;
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153 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
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154 SDL_Screen, attribs);
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155 }
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156 #endif
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157 if( !glx_visualinfo ) {
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158 SDL_SetError( "Couldn't find matching GLX visual");
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159 return NULL;
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160 }
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161 return glx_visualinfo;
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162 #else
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163 SDL_SetError("X11 driver not configured with OpenGL");
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164 return NULL;
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165 #endif
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166 }
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167
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168 int X11_GL_CreateWindow(_THIS, int w, int h)
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169 {
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170 int retval;
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171 #ifdef HAVE_OPENGL
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172 XSetWindowAttributes attributes;
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173 unsigned long mask;
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174 unsigned long black;
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175
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176 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display,
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177 SDL_Screen))
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178 ? BlackPixel(SDL_Display, SDL_Screen) : 0;
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179 attributes.background_pixel = black;
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180 attributes.border_pixel = black;
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181 attributes.colormap = SDL_XColorMap;
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182 mask = CWBackPixel | CWBorderPixel | CWColormap;
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183
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184 SDL_Window = XCreateWindow(SDL_Display, WMwindow,
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185 0, 0, w, h, 0, glx_visualinfo->depth,
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186 InputOutput, glx_visualinfo->visual,
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187 mask, &attributes);
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188 if ( !SDL_Window ) {
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189 SDL_SetError("Could not create window");
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190 return -1;
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191 }
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192 retval = 0;
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193 #else
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194 SDL_SetError("X11 driver not configured with OpenGL");
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195 retval = -1;
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196 #endif
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197 return(retval);
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198 }
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199
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200 int X11_GL_CreateContext(_THIS)
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201 {
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202 int retval;
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203 #ifdef HAVE_OPENGL
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204 /* We do this to create a clean separation between X and GLX errors. */
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205 XSync( SDL_Display, False );
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206 glx_context = this->gl_data->glXCreateContext(GFX_Display,
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207 glx_visualinfo, NULL, True);
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208 XSync( GFX_Display, False );
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209
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210 if (glx_context == NULL) {
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211 SDL_SetError("Could not create GL context");
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212 return -1;
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213 }
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214
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215 gl_active = 1;
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216 #else
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217 SDL_SetError("X11 driver not configured with OpenGL");
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218 #endif
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219 if ( gl_active ) {
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220 retval = 0;
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221 } else {
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222 retval = -1;
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diff changeset
223 }
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224 return(retval);
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225 }
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226
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227 void X11_GL_Shutdown(_THIS)
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228 {
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diff changeset
229 #ifdef HAVE_OPENGL
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230 /* Clean up OpenGL */
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diff changeset
231 if( glx_context ) {
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232 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL);
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233
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234 if (glx_context != NULL)
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diff changeset
235 this->gl_data->glXDestroyContext(GFX_Display, glx_context);
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236
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237 if( this->gl_data->glXReleaseBuffersMESA ) {
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238 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window);
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diff changeset
239 }
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240 glx_context = NULL;
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241 }
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242 gl_active = 0;
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243 #endif /* HAVE_OPENGL */
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244 }
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245
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diff changeset
246 #ifdef HAVE_OPENGL
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247
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
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diff changeset
248 static int ExtensionSupported(const char *extension)
638
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249 {
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250 const GLubyte *extensions = NULL;
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251 const GLubyte *start;
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252 GLubyte *where, *terminator;
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253
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254 /* Extension names should not have spaces. */
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255 where = (GLubyte *) strchr(extension, ' ');
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256 if (where || *extension == '\0')
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257 return 0;
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diff changeset
258
643
564716cfb502 Removed direct dependency on OpenGL (call current_video->glGetString() instead
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
259 extensions = current_video->glGetString(GL_EXTENSIONS);
638
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260 /* It takes a bit of care to be fool-proof about parsing the
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261 * OpenGL extensions string. Don't be fooled by sub-strings,
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diff changeset
262 * etc. */
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diff changeset
263
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diff changeset
264 start = extensions;
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diff changeset
265
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diff changeset
266 for (;;)
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diff changeset
267 {
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diff changeset
268 where = (GLubyte *) strstr((const char *) start, extension);
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diff changeset
269 if (!where) break;
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diff changeset
270
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diff changeset
271 terminator = where + strlen(extension);
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diff changeset
272 if (where == start || *(where - 1) == ' ')
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273 if (*terminator == ' ' || *terminator == '\0') return 1;
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diff changeset
274
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diff changeset
275 start = terminator;
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diff changeset
276 }
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diff changeset
277
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
278 return 0;
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diff changeset
279 }
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diff changeset
280
0
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diff changeset
281 /* Make the current context active */
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parents:
diff changeset
282 int X11_GL_MakeCurrent(_THIS)
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parents:
diff changeset
283 {
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diff changeset
284 int retval;
638
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diff changeset
285
0
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diff changeset
286 retval = 0;
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diff changeset
287 if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
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parents:
diff changeset
288 SDL_Window, glx_context) ) {
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diff changeset
289 SDL_SetError("Unable to make GL context current");
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diff changeset
290 retval = -1;
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diff changeset
291 }
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diff changeset
292 XSync( GFX_Display, False );
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diff changeset
293
638
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diff changeset
294 /*
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
295 * The context is now current, check for glXReleaseBuffersMESA()
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
296 * extension. If extension is _not_ supported, destroy the pointer
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diff changeset
297 * (to make sure it will not be called in X11_GL_Shutdown() ).
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diff changeset
298 *
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diff changeset
299 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so,
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
300 * 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
301 * non-DRI drivers).
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
302 *
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
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diff changeset
303 * 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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diff changeset
304 * glXReleaseBuffersMESA() returns the pointer from the glew library
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
305 * (namespace conflict).
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
306 *
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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diff changeset
307 * 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
308 * driver doesn't support this extension. So blindly calling it will
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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parents: 566
diff changeset
309 * cause segfault with DRI/Mesa drivers!
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
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parents: 566
diff changeset
310 *
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
311 */
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
312
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
313 if ( ! ExtensionSupported("glXReleaseBuffersMESA") ) {
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
314 this->gl_data->glXReleaseBuffersMESA = NULL;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
315 }
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
316
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 /* More Voodoo X server workarounds... Grr... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 SDL_Lock_EventThread();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 X11_CheckDGAMouse(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 SDL_Unlock_EventThread();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 /* Get attribute data from glX. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 int glx_attrib = None;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 switch( attrib ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 case SDL_GL_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 glx_attrib = GLX_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 case SDL_GL_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 glx_attrib = GLX_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 case SDL_GL_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 glx_attrib = GLX_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 case SDL_GL_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 glx_attrib = GLX_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 case SDL_GL_DOUBLEBUFFER:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 glx_attrib = GLX_DOUBLEBUFFER;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 case SDL_GL_BUFFER_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 glx_attrib = GLX_BUFFER_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 case SDL_GL_DEPTH_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 glx_attrib = GLX_DEPTH_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 case SDL_GL_STENCIL_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 glx_attrib = GLX_STENCIL_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 case SDL_GL_ACCUM_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 glx_attrib = GLX_ACCUM_RED_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 case SDL_GL_ACCUM_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 glx_attrib = GLX_ACCUM_GREEN_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 case SDL_GL_ACCUM_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 glx_attrib = GLX_ACCUM_BLUE_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 case SDL_GL_ACCUM_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 glx_attrib = GLX_ACCUM_ALPHA_SIZE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 break;
450
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
368 case SDL_GL_STEREO:
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
369 glx_attrib = GLX_STEREO;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
370 break;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
parents: 655
diff changeset
371 case SDL_GL_MULTISAMPLEBUFFERS:
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
372 glx_attrib = GLX_SAMPLE_BUFFERS_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
373 break;
656
864e2d2a9a55 Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
parents: 655
diff changeset
374 case SDL_GL_MULTISAMPLESAMPLES:
655
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
375 glx_attrib = GLX_SAMPLES_ARB;
9c42ee1b7d77 Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
parents: 646
diff changeset
376 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 return retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 void X11_GL_SwapBuffers(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 #endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 void X11_GL_UnloadLibrary(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 if ( this->gl_config.driver_loaded ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 dlclose(this->gl_config.dll_handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 this->gl_data->glXGetProcAddress = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 this->gl_data->glXChooseVisual = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 this->gl_data->glXCreateContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 this->gl_data->glXDestroyContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 this->gl_data->glXMakeCurrent = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 this->gl_data->glXSwapBuffers = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 this->gl_config.dll_handle = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 this->gl_config.driver_loaded = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 }
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 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 /* Passing a NULL path means load pointers from the application */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 int X11_GL_LoadLibrary(_THIS, const char* path)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 void* handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 int 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 ( gl_active ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 SDL_SetError("OpenGL context already created");
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 #ifdef RTLD_GLOBAL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 dlopen_flags = RTLD_LAZY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 handle = dlopen(path, dlopen_flags);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 /* Catch the case where the application isn't linked with GL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 dlclose(handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 path = getenv("SDL_VIDEO_GL_DRIVER");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 if ( path == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 path = DEFAULT_OPENGL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 handle = dlopen(path, dlopen_flags);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 if ( handle == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 SDL_SetError("Could not load OpenGL library");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 /* Unload the old driver and reset the pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 X11_GL_UnloadLibrary(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 /* Load new function pointers */
180
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
449 this->gl_data->glXGetProcAddress =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
450 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
451 this->gl_data->glXChooseVisual =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
452 (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
453 this->gl_data->glXCreateContext =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
454 (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
455 this->gl_data->glXDestroyContext =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
456 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
457 this->gl_data->glXMakeCurrent =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
458 (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
459 this->gl_data->glXSwapBuffers =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
460 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers");
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
461 this->gl_data->glXGetConfig =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
462 (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
463 this->gl_data->glXQueryExtensionsString =
646
0f2029a70548 Fixed incorrect prototype for glXQueryExtensionsString()
Sam Lantinga <slouken@libsdl.org>
parents: 643
diff changeset
464 (const char *(*)(Display *, int)) dlsym(handle, "glXQueryExtensionsString");
638
b0108e9dea53 Date: Sun, 11 May 2003 19:59:06 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 566
diff changeset
465
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 /* 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
467 this->gl_data->glXReleaseBuffersMESA =
578815880307 Do proper typecasting so this compiles on IRIX
Sam Lantinga <slouken@libsdl.org>
parents: 127
diff changeset
468 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" );
638
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469
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470
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471 if ( (this->gl_data->glXChooseVisual == NULL) ||
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472 (this->gl_data->glXCreateContext == NULL) ||
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473 (this->gl_data->glXDestroyContext == NULL) ||
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474 (this->gl_data->glXMakeCurrent == NULL) ||
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475 (this->gl_data->glXSwapBuffers == NULL) ||
638
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476 (this->gl_data->glXGetConfig == NULL) ||
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477 (this->gl_data->glXQueryExtensionsString == NULL)) {
0
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478 SDL_SetError("Could not retrieve OpenGL functions");
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479 return -1;
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480 }
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481
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482 this->gl_config.dll_handle = handle;
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483 this->gl_config.driver_loaded = 1;
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484 if ( path ) {
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485 strncpy(this->gl_config.driver_path, path,
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486 sizeof(this->gl_config.driver_path)-1);
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487 } else {
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488 strcpy(this->gl_config.driver_path, "");
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489 }
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490 return 0;
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491 }
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492
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493 void *X11_GL_GetProcAddress(_THIS, const char* proc)
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494 {
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7edee9f0f2cc SDL GL dynamic loading fix for OpenBSD
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495 static char procname[1024];
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496 void* handle;
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497 void* retval;
0
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498
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499 handle = this->gl_config.dll_handle;
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500 if ( this->gl_data->glXGetProcAddress ) {
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d6e7d7006062 Enable the glXGetProcAddressARB code (fixes problems with NVidia drivers)
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501 return this->gl_data->glXGetProcAddress(proc);
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502 }
110
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503 #if defined(__OpenBSD__) && !defined(__ELF__)
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504 #undef dlsym(x,y);
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505 #endif
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506 retval = dlsym(handle, proc);
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507 if (!retval && strlen(proc) <= 1022) {
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0bcae11eba14 Oops, that wasn't right...
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508 procname[0] = '_';
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509 strcpy(procname + 1, proc);
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510 retval = dlsym(handle, procname);
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511 }
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512 return retval;
0
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513 }
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514
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515 #endif /* HAVE_OPENGL */