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Diffstat (limited to 'src/glx/x11/glxcurrent.c')
| -rw-r--r-- | src/glx/x11/glxcurrent.c | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/src/glx/x11/glxcurrent.c b/src/glx/x11/glxcurrent.c deleted file mode 100644 index c28360bdde..0000000000 --- a/src/glx/x11/glxcurrent.c +++ /dev/null @@ -1,513 +0,0 @@ -/* - * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) - * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice including the dates of first publication and - * either this permission notice or a reference to - * http://oss.sgi.com/projects/FreeB/ - * shall be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF - * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - * - * Except as contained in this notice, the name of Silicon Graphics, Inc. - * shall not be used in advertising or otherwise to promote the sale, use or - * other dealings in this Software without prior written authorization from - * Silicon Graphics, Inc. - */ - -/** - * \file glxcurrent.c - * Client-side GLX interface for current context management. - */ - -#include "glxclient.h" -#include "glapi.h" -#include "indirect_init.h" - -/* -** We setup some dummy structures here so that the API can be used -** even if no context is current. -*/ - -static GLubyte dummyBuffer[__GLX_BUFFER_LIMIT_SIZE]; - -/* -** Dummy context used by small commands when there is no current context. -** All the -** gl and glx entry points are designed to operate as nop's when using -** the dummy context structure. -*/ -static __GLXcontext dummyContext = { - &dummyBuffer[0], - &dummyBuffer[0], - &dummyBuffer[0], - &dummyBuffer[__GLX_BUFFER_LIMIT_SIZE], - sizeof(dummyBuffer), -}; - - -/* -** All indirect rendering contexts will share the same indirect dispatch table. -*/ -static __GLapi *IndirectAPI = NULL; - - -/* - * Current context management and locking - */ - -#if defined( PTHREADS ) - -_X_HIDDEN pthread_mutex_t __glXmutex = PTHREAD_MUTEX_INITIALIZER; - -# if defined( GLX_USE_TLS ) - -/** - * Per-thread GLX context pointer. - * - * \c __glXSetCurrentContext is written is such a way that this pointer can - * \b never be \c NULL. This is important! Because of this - * \c __glXGetCurrentContext can be implemented as trivial macro. - */ -__thread void *__glX_tls_Context __attribute__ ((tls_model("initial-exec"))) - = &dummyContext; - -_X_HIDDEN void -__glXSetCurrentContext(__GLXcontext * c) -{ - __glX_tls_Context = (c != NULL) ? c : &dummyContext; -} - -# else - -static pthread_once_t once_control = PTHREAD_ONCE_INIT; - -/** - * Per-thread data key. - * - * Once \c init_thread_data has been called, the per-thread data key will - * take a value of \c NULL. As each new thread is created the default - * value, in that thread, will be \c NULL. - */ -static pthread_key_t ContextTSD; - -/** - * Initialize the per-thread data key. - * - * This function is called \b exactly once per-process (not per-thread!) to - * initialize the per-thread data key. This is ideally done using the - * \c pthread_once mechanism. - */ -static void -init_thread_data(void) -{ - if (pthread_key_create(&ContextTSD, NULL) != 0) { - perror("pthread_key_create"); - exit(-1); - } -} - -_X_HIDDEN void -__glXSetCurrentContext(__GLXcontext * c) -{ - pthread_once(&once_control, init_thread_data); - pthread_setspecific(ContextTSD, c); -} - -_X_HIDDEN __GLXcontext * -__glXGetCurrentContext(void) -{ - void *v; - - pthread_once(&once_control, init_thread_data); - - v = pthread_getspecific(ContextTSD); - return (v == NULL) ? &dummyContext : (__GLXcontext *) v; -} - -# endif /* defined( GLX_USE_TLS ) */ - -#elif defined( THREADS ) - -#error Unknown threading method specified. - -#else - -/* not thread safe */ -_X_HIDDEN __GLXcontext *__glXcurrentContext = &dummyContext; - -#endif - - -_X_HIDDEN void -__glXSetCurrentContextNull(void) -{ - __glXSetCurrentContext(&dummyContext); -#ifdef GLX_DIRECT_RENDERING - _glapi_set_dispatch(NULL); /* no-op functions */ - _glapi_set_context(NULL); -#endif -} - - -/************************************************************************/ - -PUBLIC GLXContext -glXGetCurrentContext(void) -{ - GLXContext cx = __glXGetCurrentContext(); - - if (cx == &dummyContext) { - return NULL; - } - else { - return cx; - } -} - -PUBLIC GLXDrawable -glXGetCurrentDrawable(void) -{ - GLXContext gc = __glXGetCurrentContext(); - return gc->currentDrawable; -} - - -/************************************************************************/ - -/** - * Sends a GLX protocol message to the specified display to make the context - * and the drawables current. - * - * \param dpy Display to send the message to. - * \param opcode Major opcode value for the display. - * \param gc_id Context tag for the context to be made current. - * \param draw Drawable ID for the "draw" drawable. - * \param read Drawable ID for the "read" drawable. - * \param reply Space to store the X-server's reply. - * - * \warning - * This function assumes that \c dpy is locked with \c LockDisplay on entry. - */ -static Bool -SendMakeCurrentRequest(Display * dpy, CARD8 opcode, - GLXContextID gc_id, GLXContextTag gc_tag, - GLXDrawable draw, GLXDrawable read, - xGLXMakeCurrentReply * reply) -{ - Bool ret; - - - LockDisplay(dpy); - - if (draw == read) { - xGLXMakeCurrentReq *req; - - GetReq(GLXMakeCurrent, req); - req->reqType = opcode; - req->glxCode = X_GLXMakeCurrent; - req->drawable = draw; - req->context = gc_id; - req->oldContextTag = gc_tag; - } - else { - __GLXdisplayPrivate *priv = __glXInitialize(dpy); - - /* If the server can support the GLX 1.3 version, we should - * perfer that. Not only that, some servers support GLX 1.3 but - * not the SGI extension. - */ - - if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) { - xGLXMakeContextCurrentReq *req; - - GetReq(GLXMakeContextCurrent, req); - req->reqType = opcode; - req->glxCode = X_GLXMakeContextCurrent; - req->drawable = draw; - req->readdrawable = read; - req->context = gc_id; - req->oldContextTag = gc_tag; - } - else { - xGLXVendorPrivateWithReplyReq *vpreq; - xGLXMakeCurrentReadSGIReq *req; - - GetReqExtra(GLXVendorPrivateWithReply, - sz_xGLXMakeCurrentReadSGIReq - - sz_xGLXVendorPrivateWithReplyReq, vpreq); - req = (xGLXMakeCurrentReadSGIReq *) vpreq; - req->reqType = opcode; - req->glxCode = X_GLXVendorPrivateWithReply; - req->vendorCode = X_GLXvop_MakeCurrentReadSGI; - req->drawable = draw; - req->readable = read; - req->context = gc_id; - req->oldContextTag = gc_tag; - } - } - - ret = _XReply(dpy, (xReply *) reply, 0, False); - - UnlockDisplay(dpy); - SyncHandle(); - - return ret; -} - - -#ifdef GLX_DIRECT_RENDERING -static __GLXDRIdrawable * -FetchDRIDrawable(Display * dpy, GLXDrawable glxDrawable, GLXContext gc) -{ - __GLXdisplayPrivate *const priv = __glXInitialize(dpy); - __GLXDRIdrawable *pdraw; - __GLXscreenConfigs *psc; - - if (priv == NULL) - return NULL; - - psc = &priv->screenConfigs[gc->screen]; - if (psc->drawHash == NULL) - return NULL; - - if (__glxHashLookup(psc->drawHash, glxDrawable, (void *) &pdraw) == 0) - return pdraw; - - pdraw = psc->driScreen->createDrawable(psc, glxDrawable, - glxDrawable, gc->mode); - if (__glxHashInsert(psc->drawHash, glxDrawable, pdraw)) { - (*pdraw->destroyDrawable) (pdraw); - return NULL; - } - - return pdraw; -} -#endif /* GLX_DIRECT_RENDERING */ - -static void -__glXGenerateError(Display * dpy, GLXContext gc, XID resource, - BYTE errorCode, CARD16 minorCode) -{ - xError error; - - error.errorCode = errorCode; - error.resourceID = resource; - error.sequenceNumber = dpy->request; - error.type = X_Error; - error.majorCode = gc->majorOpcode; - error.minorCode = minorCode; - _XError(dpy, &error); -} - -/** - * 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) -{ - xGLXMakeCurrentReply reply; - const GLXContext oldGC = __glXGetCurrentContext(); - 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 - - - /* 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. - */ - 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; - - 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); - } - } - if (gc) { - __glXSetCurrentContext(gc); - - gc->currentDpy = dpy; - gc->currentDrawable = draw; - gc->currentReadable = read; - gc->thread_id = _glthread_GetID(); - -#ifdef GLX_DIRECT_RENDERING - if (!gc->driContext) { -#endif - if (!IndirectAPI) - IndirectAPI = __glXNewIndirectAPI(); - _glapi_set_dispatch(IndirectAPI); - - 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 - } - 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) |