* Client-side GLX interface for current context management.
*/
-#ifdef PTHREADS
#include <pthread.h>
-#endif
#include "glxclient.h"
-#ifdef GLX_USE_APPLEGL
-#include <stdlib.h>
-
-#include "apple_glx.h"
-#include "apple_glx_context.h"
-#else
#include "glapi.h"
-#include "indirect_init.h"
-#endif
+#include "glx_error.h"
/*
** We setup some dummy structures here so that the API can be used
*/
static GLubyte dummyBuffer[__GLX_BUFFER_LIMIT_SIZE];
-
+static struct glx_context_vtable dummyVtable;
/*
** 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 = {
+struct glx_context dummyContext = {
&dummyBuffer[0],
&dummyBuffer[0],
&dummyBuffer[0],
&dummyBuffer[__GLX_BUFFER_LIMIT_SIZE],
sizeof(dummyBuffer),
+ &dummyVtable
};
-
-#ifndef GLX_USE_APPLEGL
-/*
-** All indirect rendering contexts will share the same indirect dispatch table.
-*/
-static __GLapi *IndirectAPI = NULL;
-#endif
-
/*
* Current context management and locking
*/
-#if defined( PTHREADS )
-
_X_HIDDEN pthread_mutex_t __glXmutex = PTHREAD_MUTEX_INITIALIZER;
-# if defined( GLX_USE_TLS )
+# if defined( USE_ELF_TLS )
/**
* Per-thread GLX context pointer.
= &dummyContext;
_X_HIDDEN void
-__glXSetCurrentContext(__GLXcontext * c)
+__glXSetCurrentContext(struct glx_context * c)
{
__glX_tls_Context = (c != NULL) ? c : &dummyContext;
}
}
_X_HIDDEN void
-__glXSetCurrentContext(__GLXcontext * c)
+__glXSetCurrentContext(struct glx_context * c)
{
pthread_once(&once_control, init_thread_data);
pthread_setspecific(ContextTSD, c);
}
-_X_HIDDEN __GLXcontext *
+_X_HIDDEN struct glx_context *
__glXGetCurrentContext(void)
{
void *v;
pthread_once(&once_control, init_thread_data);
v = pthread_getspecific(ContextTSD);
- return (v == NULL) ? &dummyContext : (__GLXcontext *) v;
+ return (v == NULL) ? &dummyContext : (struct glx_context *) v;
}
-# endif /* defined( GLX_USE_TLS ) */
-
-#elif defined( THREADS )
-
-#error Unknown threading method specified.
-
-#else
-
-/* not thread safe */
-_X_HIDDEN __GLXcontext *__glXcurrentContext = &dummyContext;
-
-#endif
+# endif /* defined( USE_ELF_TLS ) */
_X_HIDDEN void
__glXSetCurrentContextNull(void)
{
__glXSetCurrentContext(&dummyContext);
-#ifndef GLX_USE_APPLEGL
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
+#if defined(GLX_DIRECT_RENDERING)
_glapi_set_dispatch(NULL); /* no-op functions */
_glapi_set_context(NULL);
#endif
-#endif
}
-
-/************************************************************************/
-
-PUBLIC GLXContext
+_GLX_PUBLIC GLXContext
glXGetCurrentContext(void)
{
- GLXContext cx = __glXGetCurrentContext();
+ struct glx_context *cx = __glXGetCurrentContext();
if (cx == &dummyContext) {
return NULL;
}
else {
- return cx;
+ return (GLXContext) cx;
}
}
-PUBLIC GLXDrawable
+_GLX_PUBLIC GLXDrawable
glXGetCurrentDrawable(void)
{
- GLXContext gc = __glXGetCurrentContext();
+ struct glx_context *gc = __glXGetCurrentContext();
return gc->currentDrawable;
}
-
-#ifndef GLX_USE_APPLEGL
-/************************************************************************/
-
-/**
- * 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)
+SendMakeCurrentRequest(Display * dpy, GLXContextID gc_id,
+ GLXContextTag gc_tag, GLXDrawable draw,
+ GLXDrawable read, GLXContextTag *out_tag)
{
+ xGLXMakeCurrentReply reply;
Bool ret;
-
+ int opcode = __glXSetupForCommand(dpy);
LockDisplay(dpy);
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.
- */
+ struct glx_display *priv = __glXInitialize(dpy);
if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
xGLXMakeContextCurrentReq *req;
}
}
- ret = _XReply(dpy, (xReply *) reply, 0, False);
+ ret = _XReply(dpy, (xReply *) &reply, 0, False);
+
+
+ if (ret == 1)
+ *out_tag = reply.contextTag;
UnlockDisplay(dpy);
SyncHandle();
return ret;
}
-
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
-static __GLXDRIdrawable *
-FetchDRIDrawable(Display * dpy, GLXDrawable glxDrawable, GLXContext gc)
+static void
+SetGC(struct glx_context *gc, Display *dpy, GLXDrawable draw, GLXDrawable read)
{
- __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;
+ gc->currentDpy = dpy;
+ gc->currentDrawable = draw;
+ gc->currentReadable = read;
}
-#endif /* GLX_DIRECT_RENDERING */
-static void
-__glXGenerateError(Display * dpy, GLXContext gc, XID resource,
- BYTE errorCode, CARD16 minorCode)
+static Bool
+should_send(Display *dpy, struct glx_context *gc)
{
- 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);
-}
+ /* always send for indirect contexts */
+ if (!gc->isDirect)
+ return 1;
-#endif /* GLX_USE_APPLEGL */
+ /* don't send for broken servers. */
+ if (VendorRelease(dpy) < 12006000 || VendorRelease(dpy) >= 40000000)
+ return 0;
+
+ return 1;
+}
-/**
- * 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)
+ GLXDrawable read, GLXContext gc_user)
{
- const GLXContext oldGC = __glXGetCurrentContext();
-#ifdef GLX_USE_APPLEGL
- bool error = apple_glx_make_current_context(dpy,
- (oldGC && oldGC != &dummyContext) ? oldGC->driContext : NULL,
- gc ? gc->driContext : 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;
- }
+ struct glx_context *gc = (struct glx_context *) gc_user;
+ struct glx_context *oldGC = __glXGetCurrentContext();
+ Bool ret = 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
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();
+ __glXLock();
- if (gc != NULL && gc->thread_id != 0 && gc->thread_id != _glthread_GetID()) {
- __glXGenerateError(dpy, gc, gc->xid,
- BadAccess, X_GLXMakeContextCurrent);
- return False;
+ if (oldGC == gc &&
+ gc->currentDrawable == draw &&
+ gc->currentReadable == read) {
+ /* Same context and drawables: no op, just return */
+ ret = GL_TRUE;
}
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
- /* 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;
+ else if (oldGC == gc) {
+ /* Same context and new drawables: update drawable bindings */
+ if (should_send(dpy, gc)) {
+ if (!SendMakeCurrentRequest(dpy, gc->xid, gc->currentContextTag,
+ draw, read, &gc->currentContextTag)) {
+ goto out;
+ }
}
- 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 (gc->vtable->bind(gc, gc, draw, read) != Success) {
+ __glXSetCurrentContextNull();
+ goto out;
+ }
}
+ else {
+ /* Different contexts: release the old, bind the new */
+ GLXContextTag oldTag = oldGC->currentContextTag;
- if (!bindReturnValue) {
- return False;
- }
+ if (oldGC != &dummyContext) {
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
- 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);
- }
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
- else if (oldGC->driContext && oldGC != gc) {
- oldGC->driContext->unbindContext(oldGC->driContext);
- }
-#endif
+ if (--oldGC->thread_refcount == 0) {
+ if (oldGC->xid != None &&
+ should_send(dpy, oldGC) &&
+ !SendMakeCurrentRequest(dpy, None, oldTag, None, None,
+ &oldGC->currentContextTag)) {
+ goto out;
+ }
-#endif /* GLX_USE_APPLEGL */
+ oldGC->vtable->unbind(oldGC, gc);
- /* 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;
+ if (oldGC->xid == None) {
+ /* destroyed context, free it */
+ oldGC->vtable->destroy(oldGC);
+ oldTag = 0;
+ } else {
+ SetGC(oldGC, NULL, None, None);
+ oldTag = oldGC->currentContextTag;
+ }
+ }
}
- }
- 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
-
+ __glXSetCurrentContextNull();
+
+ if (gc) {
/*
- * At this point we should check if the context has been
- * through glXDestroyContext, and redestroy it if so.
+ * MESA_multithread_makecurrent makes this complicated. We need to
+ * send the request if the new context is
+ *
+ * a) indirect (may be current to another client), or
+ * b) (direct and) newly being made current, or
+ * c) (direct and) being bound to new drawables
*/
- 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.
- */
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
- /* Destroy the old direct rendering context */
- if (oldGC->driContext) {
- oldGC->driContext->destroyContext(oldGC->driContext,
- oldGC->psc,
- oldGC->createDpy);
- oldGC->driContext = NULL;
+ Bool new_drawables = gc->currentReadable != read ||
+ gc->currentDrawable != draw;
+
+ if (should_send(dpy, gc)) {
+ if (!gc->isDirect || !gc->thread_refcount || new_drawables) {
+ if (!SendMakeCurrentRequest(dpy, gc->xid, oldTag, draw, read,
+ &gc->currentContextTag)) {
+ goto out;
+ }
}
-#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();
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
- 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);
- }
-#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
+ if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
+ __glXSendError(dpy, GLXBadContext, None, X_GLXMakeContextCurrent,
+ False);
+ goto out;
}
- else {
- gc->currentContextTag = -1;
+
+ if (gc->thread_refcount == 0) {
+ SetGC(gc, dpy, draw, read);
}
-#endif
-#endif /* GLX_USE_APPLEGL */
- }
- else {
- __glXSetCurrentContextNull();
+ gc->thread_refcount++;
+ __glXSetCurrentContext(gc);
}
}
+ ret = GL_TRUE;
+
+out:
__glXUnlock();
- return GL_TRUE;
+ return ret;
}
-PUBLIC Bool
+_GLX_PUBLIC Bool
glXMakeCurrent(Display * dpy, GLXDrawable draw, GLXContext gc)
{
return MakeContextCurrent(dpy, draw, draw, gc);
}
-PUBLIC
+_GLX_PUBLIC
GLX_ALIAS(Bool, glXMakeCurrentReadSGI,
(Display * dpy, GLXDrawable d, GLXDrawable r, GLXContext ctx),
(dpy, d, r, ctx), MakeContextCurrent)
-PUBLIC
+_GLX_PUBLIC
GLX_ALIAS(Bool, glXMakeContextCurrent,
(Display * dpy, GLXDrawable d, GLXDrawable r,
GLXContext ctx), (dpy, d, r, ctx), MakeContextCurrent)
projects / mesa.git / blobdiff