static void
X11_GL_InitExtensions(_THIS)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
const int screen = DefaultScreen(display);
XVisualInfo *vinfo = NULL;
Window w = 0;
GLXContext prev_ctx = 0;
GLXDrawable prev_drawable = 0;
GLXContext context = 0;
const char *(*glXQueryExtensionsStringFunc) (Display *, int);
const char *extensions;
vinfo = X11_GL_GetVisual(_this, display, screen);
if (vinfo) {
GLXContext (*glXGetCurrentContextFunc) (void) =
(GLXContext(*)(void))
X11_GL_GetProcAddress(_this, "glXGetCurrentContext");
GLXDrawable (*glXGetCurrentDrawableFunc) (void) =
(GLXDrawable(*)(void))
X11_GL_GetProcAddress(_this, "glXGetCurrentDrawable");
if (glXGetCurrentContextFunc && glXGetCurrentDrawableFunc) {
XSetWindowAttributes xattr;
prev_ctx = glXGetCurrentContextFunc();
prev_drawable = glXGetCurrentDrawableFunc();
xattr.background_pixel = 0;
xattr.border_pixel = 0;
xattr.colormap =
X11_XCreateColormap(display, RootWindow(display, screen),
vinfo->visual, AllocNone);
w = X11_XCreateWindow(display, RootWindow(display, screen), 0, 0,
32, 32, 0, vinfo->depth, InputOutput, vinfo->visual,
(CWBackPixel | CWBorderPixel | CWColormap), &xattr);
context = _this->gl_data->glXCreateContext(display, vinfo,
NULL, True);
if (context) {
_this->gl_data->glXMakeCurrent(display, w, context);
}
}
X11_XFree(vinfo);
}
glXQueryExtensionsStringFunc =
(const char *(*)(Display *, int)) X11_GL_GetProcAddress(_this,
"glXQueryExtensionsString");
if (glXQueryExtensionsStringFunc) {
extensions = glXQueryExtensionsStringFunc(display, screen);
} else {
extensions = NULL;
}
/* Check for GLX_EXT_swap_control(_tear) */
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_FALSE;
if (HasExtension("GLX_EXT_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalEXT =
(void (*)(Display*,GLXDrawable,int))
X11_GL_GetProcAddress(_this, "glXSwapIntervalEXT");
if (HasExtension("GLX_EXT_swap_control_tear", extensions)) {
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_TRUE;
}
}
/* Check for GLX_MESA_swap_control */
if (HasExtension("GLX_MESA_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalMESA =
(int(*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalMESA");
_this->gl_data->glXGetSwapIntervalMESA =
(int(*)(void)) X11_GL_GetProcAddress(_this,
"glXGetSwapIntervalMESA");
}
/* Check for GLX_SGI_swap_control */
if (HasExtension("GLX_SGI_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalSGI =
(int (*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalSGI");
}
/* Check for GLX_ARB_create_context */
if (HasExtension("GLX_ARB_create_context", extensions)) {
_this->gl_data->glXCreateContextAttribsARB =
(GLXContext (*)(Display*,GLXFBConfig,GLXContext,Bool,const int *))
X11_GL_GetProcAddress(_this, "glXCreateContextAttribsARB");
_this->gl_data->glXChooseFBConfig =
(GLXFBConfig *(*)(Display *, int, const int *, int *))
X11_GL_GetProcAddress(_this, "glXChooseFBConfig");
}
/* Check for GLX_EXT_visual_rating */
if (HasExtension("GLX_EXT_visual_rating", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_rating = SDL_TRUE;
}
/* Check for GLX_EXT_visual_info */
if (HasExtension("GLX_EXT_visual_info", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_info = SDL_TRUE;
}
/* Check for GLX_EXT_create_context_es2_profile */
if (HasExtension("GLX_EXT_create_context_es2_profile", extensions)) {
/* this wants to call glGetString(), so it needs a context. */
/* !!! FIXME: it would be nice not to make a context here though! */
if (context) {
SDL_GL_DeduceMaxSupportedESProfile(
&_this->gl_data->es_profile_max_supported_version.major,
&_this->gl_data->es_profile_max_supported_version.minor
);
}
}
/* Check for GLX_ARB_context_flush_control */
if (HasExtension("GLX_ARB_context_flush_control", extensions)) {
_this->gl_data->HAS_GLX_ARB_context_flush_control = SDL_TRUE;
}
/* Check for GLX_ARB_create_context_robustness */
if (HasExtension("GLX_ARB_create_context_robustness", extensions)) {
_this->gl_data->HAS_GLX_ARB_create_context_robustness = SDL_TRUE;
}
/* Check for GLX_ARB_create_context_no_error */
if (HasExtension("GLX_ARB_create_context_no_error", extensions)) {
_this->gl_data->HAS_GLX_ARB_create_context_no_error = SDL_TRUE;
}
if (context) {
_this->gl_data->glXMakeCurrent(display, None, NULL);
_this->gl_data->glXDestroyContext(display, context);
if (prev_ctx && prev_drawable) {
_this->gl_data->glXMakeCurrent(display, prev_drawable, prev_ctx);
}
}
if (w) {
X11_XDestroyWindow(display, w);
}
X11_PumpEvents(_this);
}
static void
X11_GL_InitExtensions(_THIS)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
int screen = DefaultScreen(display);
XVisualInfo *vinfo;
XSetWindowAttributes xattr;
Window w;
GLXContext context;
const char *(*glXQueryExtensionsStringFunc) (Display *, int);
const char *extensions;
vinfo = X11_GL_GetVisual(_this, display, screen);
if (!vinfo) {
return;
}
xattr.background_pixel = 0;
xattr.border_pixel = 0;
xattr.colormap =
X11_XCreateColormap(display, RootWindow(display, screen), vinfo->visual,
AllocNone);
w = X11_XCreateWindow(display, RootWindow(display, screen), 0, 0, 32, 32, 0,
vinfo->depth, InputOutput, vinfo->visual,
(CWBackPixel | CWBorderPixel | CWColormap), &xattr);
context = _this->gl_data->glXCreateContext(display, vinfo, NULL, True);
if (context) {
_this->gl_data->glXMakeCurrent(display, w, context);
}
X11_XFree(vinfo);
glXQueryExtensionsStringFunc =
(const char *(*)(Display *, int)) X11_GL_GetProcAddress(_this,
"glXQueryExtensionsString");
if (glXQueryExtensionsStringFunc) {
extensions = glXQueryExtensionsStringFunc(display, screen);
} else {
extensions = NULL;
}
/* Check for GLX_EXT_swap_control(_tear) */
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_FALSE;
if (HasExtension("GLX_EXT_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalEXT =
(void (*)(Display*,GLXDrawable,int))
X11_GL_GetProcAddress(_this, "glXSwapIntervalEXT");
if (HasExtension("GLX_EXT_swap_control_tear", extensions)) {
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_TRUE;
}
}
/* Check for GLX_MESA_swap_control */
if (HasExtension("GLX_MESA_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalMESA =
(int(*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalMESA");
_this->gl_data->glXGetSwapIntervalMESA =
(int(*)(void)) X11_GL_GetProcAddress(_this,
"glXGetSwapIntervalMESA");
}
/* Check for GLX_SGI_swap_control */
if (HasExtension("GLX_SGI_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalSGI =
(int (*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalSGI");
}
/* Check for GLX_EXT_visual_rating */
if (HasExtension("GLX_EXT_visual_rating", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_rating = SDL_TRUE;
}
/* Check for GLX_EXT_visual_info */
if (HasExtension("GLX_EXT_visual_info", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_info = SDL_TRUE;
}
/* Check for GLX_EXT_create_context_es2_profile */
if (HasExtension("GLX_EXT_create_context_es2_profile", extensions)) {
_this->gl_data->HAS_GLX_EXT_create_context_es2_profile = SDL_TRUE;
}
/* Check for GLX_MESA_query_renderer */
if (HasExtension("GLX_MESA_query_renderer", extensions)) {
_this->gl_data->glXQueryRendererIntegerMESA =
(int(*)(int)) X11_GL_GetProcAddress(
_this, "glXQueryRendererIntegerMESA");
_this->gl_data->glXQueryCurrentRendererIntegerMESA =
(int(*)(void)) X11_GL_GetProcAddress(
_this, "glXQueryCurrentRendererIntegerMESA");
_this->gl_data->glXQueryRendererStringMESA =
(int(*)(int)) X11_GL_GetProcAddress(
_this, "glXQueryRendererStringMESA");
_this->gl_data->glXQueryCurrentRendererStringMESA =
(int(*)(void)) X11_GL_GetProcAddress(
_this, "glXQueryCurrentRendererStringMESA");
}
/* Check for GL_NVX_gpu_memory_info */
if (HasExtension("GL_NVX_gpu_memory_info", extensions)) {
_this->gl_data->HAS_GL_NVX_gpu_memory_info = SDL_TRUE;
}
/* Check for GL_NVX_gpu_memory_info */
if (HasExtension("GL_NVX_gpu_memory_info", extensions)) {
_this->gl_data->HAS_GL_NVX_gpu_memory_info = SDL_TRUE;
}
if (context) {
_this->gl_data->glXMakeCurrent(display, None, NULL);
_this->gl_data->glXDestroyContext(display, context);
}
X11_XDestroyWindow(display, w);
X11_PumpEvents(_this);
}
