static void
X11_CheckWindowManager(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
Display *display = data->display;
Atom _NET_SUPPORTING_WM_CHECK;
int status, real_format;
Atom real_type;
unsigned long items_read = 0, items_left = 0;
unsigned char *propdata = NULL;
Window wm_window = 0;
#ifdef DEBUG_WINDOW_MANAGER
char *wm_name;
#endif
/* Set up a handler to gracefully catch errors */
X11_XSync(display, False);
handler = X11_XSetErrorHandler(X11_CheckWindowManagerErrorHandler);
_NET_SUPPORTING_WM_CHECK = X11_XInternAtom(display, "_NET_SUPPORTING_WM_CHECK", False);
status = X11_XGetWindowProperty(display, DefaultRootWindow(display), _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
if (status == Success) {
if (items_read) {
wm_window = ((Window*)propdata)[0];
}
if (propdata) {
X11_XFree(propdata);
propdata = NULL;
}
}
if (wm_window) {
status = X11_XGetWindowProperty(display, wm_window, _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
if (status != Success || !items_read || wm_window != ((Window*)propdata)[0]) {
wm_window = None;
}
if (status == Success && propdata) {
X11_XFree(propdata);
propdata = NULL;
}
}
/* Reset the error handler, we're done checking */
X11_XSync(display, False);
X11_XSetErrorHandler(handler);
if (!wm_window) {
#ifdef DEBUG_WINDOW_MANAGER
printf("Couldn't get _NET_SUPPORTING_WM_CHECK property\n");
#endif
return;
}
data->net_wm = SDL_TRUE;
#ifdef DEBUG_WINDOW_MANAGER
wm_name = X11_GetWindowTitle(_this, wm_window);
printf("Window manager: %s\n", wm_name);
SDL_free(wm_name);
#endif
}
static void
X11_ResetXIM(_THIS)
{
#ifdef X_HAVE_UTF8_STRING
SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
int i;
if (videodata && videodata->windowlist) {
for (i = 0; i < videodata->numwindows; ++i) {
SDL_WindowData *data = videodata->windowlist[i];
if (data && data->ic) {
/* Clear any partially entered dead keys */
char *contents = X11_Xutf8ResetIC(data->ic);
if (contents) {
X11_XFree(contents);
}
}
}
}
#endif
}
/* Create and set up our X11 dialog box indow. */
static int
X11_MessageBoxCreateWindow( SDL_MessageBoxDataX11 *data )
{
int x, y;
XSizeHints *sizehints;
XSetWindowAttributes wnd_attr;
Atom _NET_WM_WINDOW_TYPE, _NET_WM_WINDOW_TYPE_DIALOG, _NET_WM_NAME, UTF8_STRING;
Display *display = data->display;
SDL_WindowData *windowdata = NULL;
const SDL_MessageBoxData *messageboxdata = data->messageboxdata;
if ( messageboxdata->window ) {
SDL_DisplayData *displaydata =
(SDL_DisplayData *) SDL_GetDisplayForWindow(messageboxdata->window)->driverdata;
windowdata = (SDL_WindowData *)messageboxdata->window->driverdata;
data->screen = displaydata->screen;
} else {
data->screen = DefaultScreen( display );
}
data->event_mask = ExposureMask |
ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
StructureNotifyMask | FocusChangeMask | PointerMotionMask;
wnd_attr.event_mask = data->event_mask;
data->window = X11_XCreateWindow(
display, RootWindow(display, data->screen),
0, 0,
data->dialog_width, data->dialog_height,
0, CopyFromParent, InputOutput, CopyFromParent,
CWEventMask, &wnd_attr );
if ( data->window == None ) {
return SDL_SetError("Couldn't create X window");
}
if ( windowdata ) {
/* http://tronche.com/gui/x/icccm/sec-4.html#WM_TRANSIENT_FOR */
X11_XSetTransientForHint( display, data->window, windowdata->xwindow );
}
X11_XStoreName( display, data->window, messageboxdata->title );
_NET_WM_NAME = X11_XInternAtom(display, "_NET_WM_NAME", False);
UTF8_STRING = X11_XInternAtom(display, "UTF8_STRING", False);
X11_XChangeProperty(display, data->window, _NET_WM_NAME, UTF8_STRING, 8,
PropModeReplace, (unsigned char *) messageboxdata->title,
strlen(messageboxdata->title) + 1 );
/* Let the window manager know this is a dialog box */
_NET_WM_WINDOW_TYPE = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
_NET_WM_WINDOW_TYPE_DIALOG = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE_DIALOG", False);
X11_XChangeProperty(display, data->window, _NET_WM_WINDOW_TYPE, XA_ATOM, 32,
PropModeReplace,
(unsigned char *)&_NET_WM_WINDOW_TYPE_DIALOG, 1);
/* Allow the window to be deleted by the window manager */
data->wm_protocols = X11_XInternAtom( display, "WM_PROTOCOLS", False );
data->wm_delete_message = X11_XInternAtom( display, "WM_DELETE_WINDOW", False );
X11_XSetWMProtocols( display, data->window, &data->wm_delete_message, 1 );
if ( windowdata ) {
XWindowAttributes attrib;
Window dummy;
X11_XGetWindowAttributes(display, windowdata->xwindow, &attrib);
x = attrib.x + ( attrib.width - data->dialog_width ) / 2;
y = attrib.y + ( attrib.height - data->dialog_height ) / 3 ;
X11_XTranslateCoordinates(display, windowdata->xwindow, RootWindow(display, data->screen), x, y, &x, &y, &dummy);
} else {
const SDL_VideoDevice *dev = SDL_GetVideoDevice();
if ((dev) && (dev->displays) && (dev->num_displays > 0)) {
const SDL_VideoDisplay *dpy = &dev->displays[0];
const SDL_DisplayData *dpydata = (SDL_DisplayData *) dpy->driverdata;
x = dpydata->x + (( dpy->current_mode.w - data->dialog_width ) / 2);
y = dpydata->y + (( dpy->current_mode.h - data->dialog_height ) / 3);
} else { /* oh well. This will misposition on a multi-head setup. Init first next time. */
x = ( DisplayWidth( display, data->screen ) - data->dialog_width ) / 2;
y = ( DisplayHeight( display, data->screen ) - data->dialog_height ) / 3 ;
}
}
X11_XMoveWindow( display, data->window, x, y );
sizehints = X11_XAllocSizeHints();
if ( sizehints ) {
sizehints->flags = USPosition | USSize | PMaxSize | PMinSize;
sizehints->x = x;
sizehints->y = y;
sizehints->width = data->dialog_width;
sizehints->height = data->dialog_height;
sizehints->min_width = sizehints->max_width = data->dialog_width;
sizehints->min_height = sizehints->max_height = data->dialog_height;
X11_XSetWMNormalHints( display, data->window, sizehints );
X11_XFree( sizehints );
}
X11_XMapRaised( display, data->window );
#if SDL_VIDEO_DRIVER_X11_XDBE
/* Initialise a back buffer for double buffering */
if (SDL_X11_HAVE_XDBE) {
int xdbe_major, xdbe_minor;
if (X11_XdbeQueryExtension(display, &xdbe_major, &xdbe_minor) != 0) {
data->xdbe = SDL_TRUE;
data->buf = X11_XdbeAllocateBackBufferName(display, data->window, XdbeUndefined);
} else {
data->xdbe = SDL_FALSE;
}
}
#endif
return 0;
}
SDL_GLContext
X11_GL_CreateContext(_THIS, SDL_Window * window)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
Display *display = data->videodata->display;
int screen =
((SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata)->screen;
XWindowAttributes xattr;
XVisualInfo v, *vinfo;
int n;
GLXContext context = NULL, share_context;
if (_this->gl_config.share_with_current_context) {
share_context = (GLXContext)SDL_GL_GetCurrentContext();
} else {
share_context = NULL;
}
/* We do this to create a clean separation between X and GLX errors. */
X11_XSync(display, False);
errorHandlerOperation = "create GL context";
errorBase = _this->gl_data->errorBase;
errorCode = Success;
handler = X11_XSetErrorHandler(X11_GL_ErrorHandler);
X11_XGetWindowAttributes(display, data->xwindow, &xattr);
v.screen = screen;
v.visualid = X11_XVisualIDFromVisual(xattr.visual);
vinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &v, &n);
if (vinfo) {
if (_this->gl_config.major_version < 3 &&
_this->gl_config.profile_mask == 0 &&
_this->gl_config.flags == 0) {
/* Create legacy context */
context =
_this->gl_data->glXCreateContext(display, vinfo, share_context, True);
} else {
/* max 10 attributes plus terminator */
int attribs[11] = {
GLX_CONTEXT_MAJOR_VERSION_ARB,
_this->gl_config.major_version,
GLX_CONTEXT_MINOR_VERSION_ARB,
_this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match GLX profile bits */
if( _this->gl_config.profile_mask != 0 ) {
attribs[iattr++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match GLX flags */
if( _this->gl_config.flags != 0 ) {
attribs[iattr++] = GLX_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
/* only set if glx extension is available */
if( _this->gl_data->HAS_GLX_ARB_context_flush_control ) {
attribs[iattr++] = GLX_CONTEXT_RELEASE_BEHAVIOR_ARB;
attribs[iattr++] =
_this->gl_config.release_behavior ?
GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB :
GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB;
}
attribs[iattr++] = 0;
/* Get a pointer to the context creation function for GL 3.0 */
if (!_this->gl_data->glXCreateContextAttribsARB) {
SDL_SetError("OpenGL 3.0 and later are not supported by this system");
} else {
int glxAttribs[64];
/* Create a GL 3.x context */
GLXFBConfig *framebuffer_config = NULL;
int fbcount = 0;
X11_GL_GetAttributes(_this,display,screen,glxAttribs,64,SDL_TRUE);
if (!_this->gl_data->glXChooseFBConfig
|| !(framebuffer_config =
_this->gl_data->glXChooseFBConfig(display,
DefaultScreen(display), glxAttribs,
&fbcount))) {
SDL_SetError("No good framebuffers found. OpenGL 3.0 and later unavailable");
} else {
context = _this->gl_data->glXCreateContextAttribsARB(display,
framebuffer_config[0],
share_context, True, attribs);
X11_XFree(framebuffer_config);
}
}
}
X11_XFree(vinfo);
}
X11_XSync(display, False);
X11_XSetErrorHandler(handler);
if (!context) {
if (errorCode == Success) {
SDL_SetError("Could not create GL context");
}
return NULL;
}
if (X11_GL_MakeCurrent(_this, window, context) < 0) {
X11_GL_DeleteContext(_this, context);
return NULL;
}
return context;
}
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);
}
/* Create and set up our X11 dialog box indow. */
static int
X11_MessageBoxCreateWindow( SDL_MessageBoxDataX11 *data )
{
int x, y;
XSizeHints *sizehints;
XSetWindowAttributes wnd_attr;
Atom _NET_WM_WINDOW_TYPE, _NET_WM_WINDOW_TYPE_DIALOG;
Display *display = data->display;
SDL_WindowData *windowdata = NULL;
const SDL_MessageBoxData *messageboxdata = data->messageboxdata;
if ( messageboxdata->window ) {
SDL_DisplayData *displaydata =
(SDL_DisplayData *) SDL_GetDisplayForWindow(messageboxdata->window)->driverdata;
windowdata = (SDL_WindowData *)messageboxdata->window->driverdata;
data->screen = displaydata->screen;
} else {
data->screen = DefaultScreen( display );
}
data->event_mask = ExposureMask |
ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
StructureNotifyMask | FocusChangeMask | PointerMotionMask;
wnd_attr.event_mask = data->event_mask;
data->window = X11_XCreateWindow(
display, RootWindow(display, data->screen),
0, 0,
data->dialog_width, data->dialog_height,
0, CopyFromParent, InputOutput, CopyFromParent,
CWEventMask, &wnd_attr );
if ( data->window == None ) {
return SDL_SetError("Couldn't create X window");
}
if ( windowdata ) {
/* http://tronche.com/gui/x/icccm/sec-4.html#WM_TRANSIENT_FOR */
X11_XSetTransientForHint( display, data->window, windowdata->xwindow );
}
X11_XStoreName( display, data->window, messageboxdata->title );
/* Let the window manager know this is a dialog box */
_NET_WM_WINDOW_TYPE = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
_NET_WM_WINDOW_TYPE_DIALOG = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE_DIALOG", False);
X11_XChangeProperty(display, data->window, _NET_WM_WINDOW_TYPE, XA_ATOM, 32,
PropModeReplace,
(unsigned char *)&_NET_WM_WINDOW_TYPE_DIALOG, 1);
/* Allow the window to be deleted by the window manager */
data->wm_protocols = X11_XInternAtom( display, "WM_PROTOCOLS", False );
data->wm_delete_message = X11_XInternAtom( display, "WM_DELETE_WINDOW", False );
X11_XSetWMProtocols( display, data->window, &data->wm_delete_message, 1 );
if ( windowdata ) {
XWindowAttributes attrib;
Window dummy;
X11_XGetWindowAttributes(display, windowdata->xwindow, &attrib);
x = attrib.x + ( attrib.width - data->dialog_width ) / 2;
y = attrib.y + ( attrib.height - data->dialog_height ) / 3 ;
X11_XTranslateCoordinates(display, windowdata->xwindow, RootWindow(display, data->screen), x, y, &x, &y, &dummy);
} else {
x = ( DisplayWidth( display, data->screen ) - data->dialog_width ) / 2;
y = ( DisplayHeight( display, data->screen ) - data->dialog_height ) / 3 ;
}
X11_XMoveWindow( display, data->window, x, y );
sizehints = X11_XAllocSizeHints();
if ( sizehints ) {
sizehints->flags = USPosition | USSize | PMaxSize | PMinSize;
sizehints->x = x;
sizehints->y = y;
sizehints->width = data->dialog_width;
sizehints->height = data->dialog_height;
sizehints->min_width = sizehints->max_width = data->dialog_width;
sizehints->min_height = sizehints->max_height = data->dialog_height;
X11_XSetWMNormalHints( display, data->window, sizehints );
X11_XFree( sizehints );
}
X11_XMapRaised( display, data->window );
return 0;
}
SDL_GLContext
X11_GL_CreateContext(_THIS, SDL_Window * window)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
Display *display = data->videodata->display;
int screen =
((SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata)->screen;
XWindowAttributes xattr;
XVisualInfo v, *vinfo;
int n;
GLXContext context = NULL, share_context;
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribs = NULL;
if (_this->gl_config.share_with_current_context) {
share_context = (GLXContext)SDL_GL_GetCurrentContext();
} else {
share_context = NULL;
}
/* We do this to create a clean separation between X and GLX errors. */
X11_XSync(display, False);
errorBase = _this->gl_data->errorBase;
handler = X11_XSetErrorHandler(X11_GL_CreateContextErrorHandler);
X11_XGetWindowAttributes(display, data->xwindow, &xattr);
v.screen = screen;
v.visualid = X11_XVisualIDFromVisual(xattr.visual);
vinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &v, &n);
if (vinfo) {
if (_this->gl_config.major_version < 3 &&
_this->gl_config.profile_mask == 0 &&
_this->gl_config.flags == 0) {
/* Create legacy context */
context =
_this->gl_data->glXCreateContext(display, vinfo, share_context, True);
} else {
/* If we want a GL 3.0 context or later we need to get a temporary
context to grab the new context creation function */
GLXContext temp_context =
_this->gl_data->glXCreateContext(display, vinfo, NULL, True);
if (temp_context) {
/* max 8 attributes plus terminator */
int attribs[9] = {
GLX_CONTEXT_MAJOR_VERSION_ARB,
_this->gl_config.major_version,
GLX_CONTEXT_MINOR_VERSION_ARB,
_this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match GLX profile bits */
if( _this->gl_config.profile_mask != 0 ) {
attribs[iattr++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match GLX flags */
if( _this->gl_config.flags != 0 ) {
attribs[iattr++] = GLX_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
attribs[iattr++] = 0;
/* Get a pointer to the context creation function for GL 3.0 */
glXCreateContextAttribs =
(PFNGLXCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
glXGetProcAddress((GLubyte *)
"glXCreateContextAttribsARB");
if (!glXCreateContextAttribs) {
SDL_SetError("GL 3.x is not supported");
context = temp_context;
} else {
int glxAttribs[64];
/* Create a GL 3.x context */
GLXFBConfig *framebuffer_config = NULL;
int fbcount = 0;
GLXFBConfig *(*glXChooseFBConfig) (Display * disp,
int screen,
const int *attrib_list,
int *nelements);
glXChooseFBConfig =
(GLXFBConfig *
(*)(Display *, int, const int *,
int *)) _this->gl_data->
glXGetProcAddress((GLubyte *) "glXChooseFBConfig");
X11_GL_GetAttributes(_this,display,screen,glxAttribs,64,SDL_TRUE);
if (!glXChooseFBConfig
|| !(framebuffer_config =
glXChooseFBConfig(display,
DefaultScreen(display), glxAttribs,
&fbcount))) {
SDL_SetError
("No good framebuffers found. GL 3.x disabled");
context = temp_context;
} else {
context =
glXCreateContextAttribs(display,
framebuffer_config[0],
share_context, True, attribs);
_this->gl_data->glXDestroyContext(display,
temp_context);
}
}
}
}
X11_XFree(vinfo);
}
X11_XSync(display, False);
X11_XSetErrorHandler(handler);
if (!context) {
SDL_SetError("Could not create GL context");
return NULL;
}
if (X11_GL_MakeCurrent(_this, window, context) < 0) {
X11_GL_DeleteContext(_this, context);
return NULL;
}
return context;
}
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);
}
