int X11_GL_CreateContext(_THIS)
{
int retval;
#if SDL_VIDEO_OPENGL_GLX
XSync( SDL_Display, False );
glx_context = this->gl_data->glXCreateContext(GFX_Display,
glx_visualinfo, NULL, True);
XSync( GFX_Display, False );
if ( glx_context == NULL ) {
SDL_SetError("Could not create GL context");
return(-1);
}
if ( X11_GL_MakeCurrent(this) < 0 ) {
return(-1);
}
gl_active = 1;
if ( !glXExtensionSupported(this, "GLX_SGI_swap_control") ) {
this->gl_data->glXSwapIntervalSGI = NULL;
}
if ( !glXExtensionSupported(this, "GLX_MESA_swap_control") ) {
this->gl_data->glXSwapIntervalMESA = NULL;
}
if ( !glXExtensionSupported(this, "GLX_EXT_swap_control") ) {
this->gl_data->glXSwapIntervalEXT = NULL;
}
if ( this->gl_config.swap_control >= 0 ) {
int rc = -1;
if ( this->gl_data->glXSwapIntervalEXT ) {
rc = this->gl_data->glXSwapIntervalEXT(GFX_Display, SDL_Window,
this->gl_config.swap_control);
} else if ( this->gl_data->glXSwapIntervalMESA ) {
rc = this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control);
} else if ( this->gl_data->glXSwapIntervalSGI ) {
rc = this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control);
}
if (rc == 0) {
this->gl_data->swap_interval = this->gl_config.swap_control;
}
}
#else
SDL_SetError("X11 driver not configured with OpenGL");
#endif
if ( gl_active ) {
retval = 0;
} else {
retval = -1;
}
return(retval);
}
int X11_GL_CreateContext(_THIS)
{
int retval;
#if SDL_VIDEO_OPENGL_GLX
/* We do this to create a clean separation between X and GLX errors. */
XSync( SDL_Display, False );
glx_context = this->gl_data->glXCreateContext(GFX_Display,
glx_visualinfo, NULL, True);
XSync( GFX_Display, False );
if ( glx_context == NULL ) {
SDL_SetError("Could not create GL context");
return(-1);
}
if ( X11_GL_MakeCurrent(this) < 0 ) {
return(-1);
}
gl_active = 1;
if ( !glXExtensionSupported(this, "GLX_SGI_swap_control") ) {
this->gl_data->glXSwapIntervalSGI = NULL;
}
if ( !glXExtensionSupported(this, "GLX_MESA_swap_control") ) {
this->gl_data->glXSwapIntervalMESA = NULL;
this->gl_data->glXGetSwapIntervalMESA = NULL;
}
if ( this->gl_config.swap_control >= 0 ) {
if ( this->gl_data->glXSwapIntervalMESA ) {
this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control);
} else if ( this->gl_data->glXSwapIntervalSGI ) {
this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control);
}
}
#else
SDL_SetError("X11 driver not configured with OpenGL");
#endif
if ( gl_active ) {
retval = 0;
} else {
retval = -1;
}
return(retval);
}
XVisualInfo *X11_GL_GetVisual(_THIS)
{
#if SDL_VIDEO_OPENGL_GLX
/* 64 seems nice. */
int attribs[64];
int i;
/* load the gl driver from a default path */
if ( ! this->gl_config.driver_loaded ) {
/* no driver has been loaded, use default (ourselves) */
if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
return NULL;
}
}
/* See if we already have a window which we must use */
if ( SDL_windowid ) {
XWindowAttributes a;
XVisualInfo vi_in;
int out_count;
XGetWindowAttributes(SDL_Display, SDL_Window, &a);
vi_in.screen = SDL_Screen;
vi_in.visualid = XVisualIDFromVisual(a.visual);
glx_visualinfo = XGetVisualInfo(SDL_Display,
VisualScreenMask|VisualIDMask, &vi_in, &out_count);
return glx_visualinfo;
}
/* Setup our GLX attributes according to the gl_config. */
i = 0;
attribs[i++] = GLX_RGBA;
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = this->gl_config.red_size;
attribs[i++] = GLX_GREEN_SIZE;
attribs[i++] = this->gl_config.green_size;
attribs[i++] = GLX_BLUE_SIZE;
attribs[i++] = this->gl_config.blue_size;
if( this->gl_config.alpha_size ) {
attribs[i++] = GLX_ALPHA_SIZE;
attribs[i++] = this->gl_config.alpha_size;
}
if( this->gl_config.buffer_size ) {
attribs[i++] = GLX_BUFFER_SIZE;
attribs[i++] = this->gl_config.buffer_size;
}
if( this->gl_config.double_buffer ) {
attribs[i++] = GLX_DOUBLEBUFFER;
}
attribs[i++] = GLX_DEPTH_SIZE;
attribs[i++] = this->gl_config.depth_size;
if( this->gl_config.stencil_size ) {
attribs[i++] = GLX_STENCIL_SIZE;
attribs[i++] = this->gl_config.stencil_size;
}
if( this->gl_config.accum_red_size ) {
attribs[i++] = GLX_ACCUM_RED_SIZE;
attribs[i++] = this->gl_config.accum_red_size;
}
if( this->gl_config.accum_green_size ) {
attribs[i++] = GLX_ACCUM_GREEN_SIZE;
attribs[i++] = this->gl_config.accum_green_size;
}
if( this->gl_config.accum_blue_size ) {
attribs[i++] = GLX_ACCUM_BLUE_SIZE;
attribs[i++] = this->gl_config.accum_blue_size;
}
if( this->gl_config.accum_alpha_size ) {
attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
attribs[i++] = this->gl_config.accum_alpha_size;
}
if( this->gl_config.stereo ) {
attribs[i++] = GLX_STEREO;
}
if( this->gl_config.multisamplebuffers ) {
attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
attribs[i++] = this->gl_config.multisamplebuffers;
}
if( this->gl_config.multisamplesamples ) {
attribs[i++] = GLX_SAMPLES_ARB;
attribs[i++] = this->gl_config.multisamplesamples;
}
if( this->gl_config.accelerated >= 0 &&
glXExtensionSupported(this, "GLX_EXT_visual_rating") ) {
attribs[i++] = GLX_VISUAL_CAVEAT_EXT;
attribs[i++] = GLX_NONE_EXT;
}
#ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */
if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) {
attribs[i++] = GLX_X_VISUAL_TYPE;
attribs[i++] = GLX_DIRECT_COLOR;
}
#endif
attribs[i++] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
#ifdef GLX_DIRECT_COLOR
if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */
attribs[i-3] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
}
#endif
if( !glx_visualinfo ) {
SDL_SetError( "Couldn't find matching GLX visual");
return NULL;
}
/*
printf("Found GLX visual 0x%x\n", glx_visualinfo->visualid);
*/
return glx_visualinfo;
#else
SDL_SetError("X11 driver not configured with OpenGL");
return NULL;
#endif
}
/* Get attribute data from glX. */
int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
{
int retval = -1;
int unsupported = 0;
int glx_attrib = None;
switch( attrib ) {
case SDL_GL_RED_SIZE:
glx_attrib = GLX_RED_SIZE;
break;
case SDL_GL_GREEN_SIZE:
glx_attrib = GLX_GREEN_SIZE;
break;
case SDL_GL_BLUE_SIZE:
glx_attrib = GLX_BLUE_SIZE;
break;
case SDL_GL_ALPHA_SIZE:
glx_attrib = GLX_ALPHA_SIZE;
break;
case SDL_GL_DOUBLEBUFFER:
glx_attrib = GLX_DOUBLEBUFFER;
break;
case SDL_GL_BUFFER_SIZE:
glx_attrib = GLX_BUFFER_SIZE;
break;
case SDL_GL_DEPTH_SIZE:
glx_attrib = GLX_DEPTH_SIZE;
break;
case SDL_GL_STENCIL_SIZE:
glx_attrib = GLX_STENCIL_SIZE;
break;
case SDL_GL_ACCUM_RED_SIZE:
glx_attrib = GLX_ACCUM_RED_SIZE;
break;
case SDL_GL_ACCUM_GREEN_SIZE:
glx_attrib = GLX_ACCUM_GREEN_SIZE;
break;
case SDL_GL_ACCUM_BLUE_SIZE:
glx_attrib = GLX_ACCUM_BLUE_SIZE;
break;
case SDL_GL_ACCUM_ALPHA_SIZE:
glx_attrib = GLX_ACCUM_ALPHA_SIZE;
break;
case SDL_GL_STEREO:
glx_attrib = GLX_STEREO;
break;
case SDL_GL_MULTISAMPLEBUFFERS:
glx_attrib = GLX_SAMPLE_BUFFERS_ARB;
break;
case SDL_GL_MULTISAMPLESAMPLES:
glx_attrib = GLX_SAMPLES_ARB;
break;
case SDL_GL_ACCELERATED_VISUAL:
if ( glXExtensionSupported(this, "GLX_EXT_visual_rating") ) {
glx_attrib = GLX_VISUAL_CAVEAT_EXT;
retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
if ( *value == GLX_SLOW_VISUAL_EXT ) {
*value = SDL_FALSE;
} else {
*value = SDL_TRUE;
}
return retval;
} else {
unsupported = 1;
}
break;
case SDL_GL_SWAP_CONTROL:
if ( this->gl_data->glXGetSwapIntervalMESA ) {
*value = this->gl_data->glXGetSwapIntervalMESA();
return(0);
} else {
unsupported = 1;
}
break;
default:
unsupported = 1;
break;
}
if (unsupported) {
SDL_SetError("OpenGL attribute is unsupported on this system");
} else {
retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
}
return retval;
}
XVisualInfo *X11_GL_GetVisual(_THIS)
{
#if SDL_VIDEO_OPENGL_GLX
int attribs[64];
int i;
if ( ! this->gl_config.driver_loaded ) {
if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
return NULL;
}
}
if ( SDL_windowid ) {
XWindowAttributes a;
XVisualInfo vi_in;
int out_count;
XGetWindowAttributes(SDL_Display, SDL_Window, &a);
vi_in.screen = SDL_Screen;
vi_in.visualid = XVisualIDFromVisual(a.visual);
glx_visualinfo = XGetVisualInfo(SDL_Display,
VisualScreenMask|VisualIDMask, &vi_in, &out_count);
return glx_visualinfo;
}
i = 0;
attribs[i++] = GLX_RGBA;
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = this->gl_config.red_size;
attribs[i++] = GLX_GREEN_SIZE;
attribs[i++] = this->gl_config.green_size;
attribs[i++] = GLX_BLUE_SIZE;
attribs[i++] = this->gl_config.blue_size;
if( this->gl_config.alpha_size ) {
attribs[i++] = GLX_ALPHA_SIZE;
attribs[i++] = this->gl_config.alpha_size;
}
if( this->gl_config.double_buffer ) {
attribs[i++] = GLX_DOUBLEBUFFER;
}
attribs[i++] = GLX_DEPTH_SIZE;
attribs[i++] = this->gl_config.depth_size;
if( this->gl_config.stencil_size ) {
attribs[i++] = GLX_STENCIL_SIZE;
attribs[i++] = this->gl_config.stencil_size;
}
if( this->gl_config.accum_red_size ) {
attribs[i++] = GLX_ACCUM_RED_SIZE;
attribs[i++] = this->gl_config.accum_red_size;
}
if( this->gl_config.accum_green_size ) {
attribs[i++] = GLX_ACCUM_GREEN_SIZE;
attribs[i++] = this->gl_config.accum_green_size;
}
if( this->gl_config.accum_blue_size ) {
attribs[i++] = GLX_ACCUM_BLUE_SIZE;
attribs[i++] = this->gl_config.accum_blue_size;
}
if( this->gl_config.accum_alpha_size ) {
attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
attribs[i++] = this->gl_config.accum_alpha_size;
}
if( this->gl_config.stereo ) {
attribs[i++] = GLX_STEREO;
}
if( this->gl_config.multisamplebuffers ) {
attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
attribs[i++] = this->gl_config.multisamplebuffers;
}
if( this->gl_config.multisamplesamples ) {
attribs[i++] = GLX_SAMPLES_ARB;
attribs[i++] = this->gl_config.multisamplesamples;
}
if( this->gl_config.accelerated >= 0 &&
glXExtensionSupported(this, "GLX_EXT_visual_rating") ) {
attribs[i++] = GLX_VISUAL_CAVEAT_EXT;
attribs[i++] = GLX_NONE_EXT;
}
#ifdef GLX_DIRECT_COLOR
if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) {
attribs[i++] = GLX_X_VISUAL_TYPE;
attribs[i++] = GLX_DIRECT_COLOR;
}
#endif
attribs[i++] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
#ifdef GLX_DIRECT_COLOR
if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) {
attribs[i-3] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
}
#endif
if( !glx_visualinfo ) {
SDL_SetError( "Couldn't find matching GLX visual");
return NULL;
}
return glx_visualinfo;
#else
SDL_SetError("X11 driver not configured with OpenGL");
return NULL;
#endif
}