/*
** Initialize the client side extension code.
*/
_X_HIDDEN __GLXdisplayPrivate *
__glXInitialize(Display * dpy)
{
XExtDisplayInfo *info = __glXFindDisplay(dpy);
XExtData **privList, *private, *found;
__GLXdisplayPrivate *dpyPriv;
XEDataObject dataObj;
int major, minor;
#ifdef GLX_DIRECT_RENDERING
Bool glx_direct, glx_accel;
#endif
/* The one and only long long lock */
__glXLock();
if (!XextHasExtension(info)) {
/* No GLX extension supported by this server. Oh well. */
__glXUnlock();
XMissingExtension(dpy, __glXExtensionName);
return 0;
}
/* See if a display private already exists. If so, return it */
dataObj.display = dpy;
privList = XEHeadOfExtensionList(dataObj);
found = XFindOnExtensionList(privList, info->codes->extension);
if (found) {
__glXUnlock();
return (__GLXdisplayPrivate *) found->private_data;
}
/* See if the versions are compatible */
if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
/* The client and server do not agree on versions. Punt. */
__glXUnlock();
return 0;
}
/*
** Allocate memory for all the pieces needed for this buffer.
*/
private = (XExtData *) Xmalloc(sizeof(XExtData));
/**
* Make a particular context current.
*
* \note This is in this file so that it can access dummyContext.
*/
static Bool
MakeContextCurrent(Display * dpy, GLXDrawable draw,
GLXDrawable read, GLXContext gc_user)
{
struct glx_context *gc = (struct glx_context *) gc_user;
struct glx_context *oldGC = __glXGetCurrentContext();
/* Make sure that the new context has a nonzero ID. In the request,
* a zero context ID is used only to mean that we bind to no current
* context.
*/
if ((gc != NULL) && (gc->xid == None)) {
return GL_FALSE;
}
_glapi_check_multithread();
__glXLock();
if (oldGC == gc &&
gc->currentDrawable == draw && gc->currentReadable == read) {
__glXUnlock();
return True;
}
if (oldGC != &dummyContext) {
if (--oldGC->thread_refcount == 0) {
oldGC->vtable->unbind(oldGC, gc);
oldGC->currentDpy = 0;
}
}
if (gc) {
/* Attempt to bind the context. We do this before mucking with
* gc and __glXSetCurrentContext to properly handle our state in
* case of an error.
*
* If an error occurs, set the Null context since we've already
* blown away our old context. The caller is responsible for
* figuring out how to handle setting a valid context.
*/
if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
__glXSetCurrentContextNull();
__glXUnlock();
__glXGenerateError(dpy, None, GLXBadContext, X_GLXMakeContextCurrent);
return GL_FALSE;
}
if (gc->thread_refcount == 0) {
gc->currentDpy = dpy;
gc->currentDrawable = draw;
gc->currentReadable = read;
}
gc->thread_refcount++;
__glXSetCurrentContext(gc);
} else {
__glXSetCurrentContextNull();
}
if (oldGC->thread_refcount == 0 && oldGC != &dummyContext && oldGC->xid == None) {
/* We are switching away from a context that was
* previously destroyed, so we need to free the memory
* for the old handle. */
oldGC->vtable->destroy(oldGC);
}
__glXUnlock();
return GL_TRUE;
}
/**
* Make a particular context current.
*
* \note This is in this file so that it can access dummyContext.
*/
static Bool
MakeContextCurrent(Display * dpy, GLXDrawable draw,
GLXDrawable read, GLXContext gc)
{
const GLXContext oldGC = __glXGetCurrentContext();
#ifdef GLX_USE_APPLEGL
bool error = apple_glx_make_current_context(dpy,
(oldGC && oldGC != &dummyContext) ? oldGC->apple : NULL,
gc ? gc->apple : NULL, draw);
apple_glx_diagnostic("%s: error %s\n", __func__, error ? "YES" : "NO");
if(error)
return GL_FALSE;
#else
xGLXMakeCurrentReply reply;
const CARD8 opcode = __glXSetupForCommand(dpy);
const CARD8 oldOpcode = ((gc == oldGC) || (oldGC == &dummyContext))
? opcode : __glXSetupForCommand(oldGC->currentDpy);
Bool bindReturnValue;
__GLXattribute *state;
if (!opcode || !oldOpcode) {
return GL_FALSE;
}
/* Make sure that the new context has a nonzero ID. In the request,
* a zero context ID is used only to mean that we bind to no current
* context.
*/
if ((gc != NULL) && (gc->xid == None)) {
return GL_FALSE;
}
if (gc == NULL && (draw != None || read != None)) {
__glXGenerateError(dpy, gc, (draw != None) ? draw : read,
BadMatch, X_GLXMakeContextCurrent);
return False;
}
if (gc != NULL && (draw == None || read == None)) {
__glXGenerateError(dpy, gc, None, BadMatch, X_GLXMakeContextCurrent);
return False;
}
_glapi_check_multithread();
if (gc != NULL && gc->thread_id != 0 && gc->thread_id != _glthread_GetID()) {
__glXGenerateError(dpy, gc, gc->xid,
BadAccess, X_GLXMakeContextCurrent);
return False;
}
#ifdef GLX_DIRECT_RENDERING
/* Bind the direct rendering context to the drawable */
if (gc && gc->driContext) {
__GLXDRIdrawable *pdraw = FetchDRIDrawable(dpy, draw, gc);
__GLXDRIdrawable *pread = FetchDRIDrawable(dpy, read, gc);
if ((pdraw == NULL) || (pread == NULL)) {
__glXGenerateError(dpy, gc, (pdraw == NULL) ? draw : read,
GLXBadDrawable, X_GLXMakeContextCurrent);
return False;
}
bindReturnValue =
(gc->driContext->bindContext) (gc->driContext, pdraw, pread);
}
else if (!gc && oldGC && oldGC->driContext) {
bindReturnValue = True;
}
else
#endif
{
/* Send a glXMakeCurrent request to bind the new context. */
bindReturnValue =
SendMakeCurrentRequest(dpy, opcode, gc ? gc->xid : None,
((dpy != oldGC->currentDpy)
|| oldGC->isDirect)
? None : oldGC->currentContextTag, draw, read,
&reply);
}
if (!bindReturnValue) {
return False;
}
#ifdef GLX_DIRECT_RENDERING
if ((dpy != oldGC->currentDpy || (gc && gc->driContext)) &&
!oldGC->isDirect && oldGC != &dummyContext) {
#else
if ((dpy != oldGC->currentDpy) && oldGC != &dummyContext) {
#endif
xGLXMakeCurrentReply dummy_reply;
/* We are either switching from one dpy to another and have to
* send a request to the previous dpy to unbind the previous
* context, or we are switching away from a indirect context to
* a direct context and have to send a request to the dpy to
* unbind the previous context.
*/
(void) SendMakeCurrentRequest(oldGC->currentDpy, oldOpcode, None,
oldGC->currentContextTag, None, None,
&dummy_reply);
}
#ifdef GLX_DIRECT_RENDERING
else if (oldGC->driContext && oldGC != gc) {
oldGC->driContext->unbindContext(oldGC->driContext);
}
#endif
#endif /* GLX_USE_APPLEGL */
/* Update our notion of what is current */
__glXLock();
if (gc == oldGC) {
/* Even though the contexts are the same the drawable might have
* changed. Note that gc cannot be the dummy, and that oldGC
* cannot be NULL, therefore if they are the same, gc is not
* NULL and not the dummy.
*/
if(gc) {
gc->currentDrawable = draw;
gc->currentReadable = read;
}
}
else {
if (oldGC != &dummyContext) {
/* Old current context is no longer current to anybody */
oldGC->currentDpy = 0;
oldGC->currentDrawable = None;
oldGC->currentReadable = None;
oldGC->currentContextTag = 0;
oldGC->thread_id = 0;
#ifdef GLX_USE_APPLEGL
/*
* At this point we should check if the context has been
* through glXDestroyContext, and redestroy it if so.
*/
if(oldGC->do_destroy) {
__glXUnlock();
/* glXDestroyContext uses the same global lock. */
glXDestroyContext(dpy, oldGC);
__glXLock();
#else
if (oldGC->xid == None) {
/* We are switching away from a context that was
* previously destroyed, so we need to free the memory
* for the old handle.
*/
#ifdef GLX_DIRECT_RENDERING
/* Destroy the old direct rendering context */
if (oldGC->driContext) {
oldGC->driContext->destroyContext(oldGC->driContext,
oldGC->psc,
oldGC->createDpy);
oldGC->driContext = NULL;
}
#endif
__glXFreeContext(oldGC);
#endif /* GLX_USE_APPLEGL */
}
}
if (gc) {
__glXSetCurrentContext(gc);
gc->currentDpy = dpy;
gc->currentDrawable = draw;
gc->currentReadable = read;
#ifndef GLX_USE_APPLEGL
gc->thread_id = _glthread_GetID();
#ifdef GLX_DIRECT_RENDERING
if (!gc->driContext) {
#endif
if (!IndirectAPI)
IndirectAPI = __glXNewIndirectAPI();
_glapi_set_dispatch(IndirectAPI);
#ifdef GLX_USE_APPLEGL
do {
extern void XAppleDRIUseIndirectDispatch(void);
XAppleDRIUseIndirectDispatch();
} while (0);
#endif
state = (__GLXattribute *) (gc->client_state_private);
gc->currentContextTag = reply.contextTag;
if (state->array_state == NULL) {
(void) glGetString(GL_EXTENSIONS);
(void) glGetString(GL_VERSION);
__glXInitVertexArrayState(gc);
}
#ifdef GLX_DIRECT_RENDERING
}
else {
gc->currentContextTag = -1;
}
#endif
#endif /* GLX_USE_APPLEGL */
}
else {
__glXSetCurrentContextNull();
}
}
__glXUnlock();
return GL_TRUE;
}
PUBLIC Bool
glXMakeCurrent(Display * dpy, GLXDrawable draw, GLXContext gc)
{
return MakeContextCurrent(dpy, draw, draw, gc);
}
PUBLIC
GLX_ALIAS(Bool, glXMakeCurrentReadSGI,
(Display * dpy, GLXDrawable d, GLXDrawable r, GLXContext ctx),
(dpy, d, r, ctx), MakeContextCurrent)
PUBLIC
GLX_ALIAS(Bool, glXMakeContextCurrent,
(Display * dpy, GLXDrawable d, GLXDrawable r,
GLXContext ctx), (dpy, d, r, ctx), MakeContextCurrent)
/**
* Make a particular context current.
*
* \note This is in this file so that it can access dummyContext.
*/
static Bool
MakeContextCurrent(Display * dpy, GLXDrawable draw,
GLXDrawable read, GLXContext gc_user)
{
struct glx_context *gc = (struct glx_context *) gc_user;
struct glx_context *oldGC = __glXGetCurrentContext();
/* XXX: If this is left out, then libGL ends up not having this
* symbol, and drivers using it fail to load. Compare the
* implementation of this symbol to _glapi_noop_enable_warnings(),
* though, which gets into the library despite no callers, the same
* prototypes, and the same compile flags to the files containing
* them. Moving the definition to glapi_nop.c gets it into the
* library, though.
*/
(void)_glthread_GetID();
/* Make sure that the new context has a nonzero ID. In the request,
* a zero context ID is used only to mean that we bind to no current
* context.
*/
if ((gc != NULL) && (gc->xid == None)) {
return GL_FALSE;
}
if (gc == NULL && (draw != None || read != None)) {
__glXGenerateError(dpy, (draw != None) ? draw : read,
BadMatch, X_GLXMakeContextCurrent);
return False;
}
if (gc != NULL && (draw == None || read == None)) {
__glXGenerateError(dpy, None, BadMatch, X_GLXMakeContextCurrent);
return False;
}
_glapi_check_multithread();
__glXLock();
if (oldGC == gc &&
gc->currentDrawable == draw && gc->currentReadable == read) {
__glXUnlock();
return True;
}
if (oldGC != &dummyContext) {
if (--oldGC->thread_refcount == 0) {
oldGC->vtable->unbind(oldGC, gc);
oldGC->currentDpy = 0;
}
}
if (gc) {
/* Attempt to bind the context. We do this before mucking with
* gc and __glXSetCurrentContext to properly handle our state in
* case of an error.
*
* If an error occurs, set the Null context since we've already
* blown away our old context. The caller is responsible for
* figuring out how to handle setting a valid context.
*/
if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
__glXSetCurrentContextNull();
__glXUnlock();
__glXGenerateError(dpy, None, GLXBadContext, X_GLXMakeContextCurrent);
return GL_FALSE;
}
if (gc->thread_refcount == 0) {
gc->currentDpy = dpy;
gc->currentDrawable = draw;
gc->currentReadable = read;
}
gc->thread_refcount++;
__glXSetCurrentContext(gc);
} else {
__glXSetCurrentContextNull();
}
if (oldGC->thread_refcount == 0 && oldGC != &dummyContext && oldGC->xid == None) {
/* We are switching away from a context that was
* previously destroyed, so we need to free the memory
* for the old handle. */
oldGC->vtable->destroy(oldGC);
}
__glXUnlock();
return GL_TRUE;
}