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Diffstat (limited to 'xorg-server/glx/glxext.c')
-rw-r--r--xorg-server/glx/glxext.c1108
1 files changed, 556 insertions, 552 deletions
diff --git a/xorg-server/glx/glxext.c b/xorg-server/glx/glxext.c
index 054ece76d..9cfc096c3 100644
--- a/xorg-server/glx/glxext.c
+++ b/xorg-server/glx/glxext.c
@@ -1,552 +1,556 @@
-/*
- * 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.
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <string.h>
-#include "glxserver.h"
-#include <windowstr.h>
-#include <propertyst.h>
-#include <registry.h>
-#include "privates.h"
-#include <os.h>
-#include "unpack.h"
-#include "glxutil.h"
-#include "glxext.h"
-#include "indirect_table.h"
-#include "indirect_util.h"
-
-/*
-** The last context used by the server. It is the context that is current
-** from the server's perspective.
-*/
-__GLXcontext *__glXLastContext;
-
-/*
-** X resources.
-*/
-RESTYPE __glXContextRes;
-RESTYPE __glXDrawableRes;
-
-/*
-** Reply for most singles.
-*/
-xGLXSingleReply __glXReply;
-
-static DevPrivateKeyRec glxClientPrivateKeyRec;
-#define glxClientPrivateKey (&glxClientPrivateKeyRec)
-
-/*
-** Forward declarations.
-*/
-static int __glXDispatch(ClientPtr);
-
-/*
-** Called when the extension is reset.
-*/
-static void ResetExtension(ExtensionEntry* extEntry)
-{
- __glXFlushContextCache();
-}
-
-/*
-** Reset state used to keep track of large (multi-request) commands.
-*/
-void __glXResetLargeCommandStatus(__GLXclientState *cl)
-{
- cl->largeCmdBytesSoFar = 0;
- cl->largeCmdBytesTotal = 0;
- cl->largeCmdRequestsSoFar = 0;
- cl->largeCmdRequestsTotal = 0;
-}
-
-/*
-** This procedure is called when the client who created the context goes
-** away OR when glXDestroyContext is called. In either case, all we do is
-** flag that the ID is no longer valid, and (maybe) free the context.
-** use.
-*/
-static int ContextGone(__GLXcontext* cx, XID id)
-{
- cx->idExists = GL_FALSE;
- if (!cx->isCurrent) {
- __glXFreeContext(cx);
- }
-
- return True;
-}
-
-static __GLXcontext *glxPendingDestroyContexts;
-static __GLXcontext *glxAllContexts;
-static int glxServerLeaveCount;
-static int glxBlockClients;
-
-/*
-** Destroy routine that gets called when a drawable is freed. A drawable
-** contains the ancillary buffers needed for rendering.
-*/
-static Bool DrawableGone(__GLXdrawable *glxPriv, XID xid)
-{
- __GLXcontext *c, *next;
-
- /* If this drawable was created using glx 1.3 drawable
- * constructors, we added it as a glx drawable resource under both
- * its glx drawable ID and it X drawable ID. Remove the other
- * resource now so we don't a callback for freed memory. */
- if (glxPriv->drawId != glxPriv->pDraw->id) {
- if (xid == glxPriv->drawId)
- FreeResourceByType(glxPriv->pDraw->id, __glXDrawableRes, TRUE);
- else
- FreeResourceByType(glxPriv->drawId, __glXDrawableRes, TRUE);
- }
-
- for (c = glxAllContexts; c; c = next) {
- next = c->next;
- if (c->isCurrent && (c->drawPriv == glxPriv || c->readPriv == glxPriv)) {
- (*c->loseCurrent)(c);
- c->isCurrent = GL_FALSE;
- if (c == __glXLastContext)
- __glXFlushContextCache();
- }
- if (c->drawPriv == glxPriv)
- c->drawPriv = NULL;
- if (c->readPriv == glxPriv)
- c->readPriv = NULL;
- }
-
- glxPriv->destroy(glxPriv);
-
- return True;
-}
-
-void __glXAddToContextList(__GLXcontext *cx)
-{
- cx->next = glxAllContexts;
- glxAllContexts = cx;
-}
-
-static void __glXRemoveFromContextList(__GLXcontext *cx)
-{
- __GLXcontext *c, *prev;
-
- if (cx == glxAllContexts)
- glxAllContexts = cx->next;
- else {
- prev = glxAllContexts;
- for (c = glxAllContexts; c; c = c->next) {
- if (c == cx)
- prev->next = c->next;
- prev = c;
- }
- }
-}
-
-/*
-** Free a context.
-*/
-GLboolean __glXFreeContext(__GLXcontext *cx)
-{
- if (cx->idExists || cx->isCurrent) return GL_FALSE;
-
- free(cx->feedbackBuf);
- free(cx->selectBuf);
- if (cx == __glXLastContext) {
- __glXFlushContextCache();
- }
-
- __glXRemoveFromContextList(cx);
-
- /* We can get here through both regular dispatching from
- * __glXDispatch() or as a callback from the resource manager. In
- * the latter case we need to lift the DRI lock manually. */
-
- if (!glxBlockClients) {
- __glXleaveServer(GL_FALSE);
- cx->destroy(cx);
- __glXenterServer(GL_FALSE);
- } else {
- cx->next = glxPendingDestroyContexts;
- glxPendingDestroyContexts = cx;
- }
-
- return GL_TRUE;
-}
-
-/************************************************************************/
-
-/*
-** These routines can be used to check whether a particular GL command
-** has caused an error. Specifically, we use them to check whether a
-** given query has caused an error, in which case a zero-length data
-** reply is sent to the client.
-*/
-
-static GLboolean errorOccured = GL_FALSE;
-
-/*
-** The GL was will call this routine if an error occurs.
-*/
-void __glXErrorCallBack(GLenum code)
-{
- errorOccured = GL_TRUE;
-}
-
-/*
-** Clear the error flag before calling the GL command.
-*/
-void __glXClearErrorOccured(void)
-{
- errorOccured = GL_FALSE;
-}
-
-/*
-** Check if the GL command caused an error.
-*/
-GLboolean __glXErrorOccured(void)
-{
- return errorOccured;
-}
-
-static int __glXErrorBase;
-int __glXEventBase;
-
-int __glXError(int error)
-{
- return __glXErrorBase + error;
-}
-
-__GLXclientState *
-glxGetClient(ClientPtr pClient)
-{
- return dixLookupPrivate(&pClient->devPrivates, glxClientPrivateKey);
-}
-
-static void
-glxClientCallback (CallbackListPtr *list,
- pointer closure,
- pointer data)
-{
- NewClientInfoRec *clientinfo = (NewClientInfoRec *) data;
- ClientPtr pClient = clientinfo->client;
- __GLXclientState *cl = glxGetClient(pClient);
-
- switch (pClient->clientState) {
- case ClientStateRunning:
- /*
- ** By default, assume that the client supports
- ** GLX major version 1 minor version 0 protocol.
- */
- cl->GLClientmajorVersion = 1;
- cl->GLClientminorVersion = 0;
- cl->client = pClient;
- break;
-
- case ClientStateGone:
- free(cl->returnBuf);
- free(cl->largeCmdBuf);
- free(cl->GLClientextensions);
- break;
-
- default:
- break;
- }
-}
-
-/************************************************************************/
-
-static __GLXprovider *__glXProviderStack;
-
-void GlxPushProvider(__GLXprovider *provider)
-{
- provider->next = __glXProviderStack;
- __glXProviderStack = provider;
-}
-
-/*
-** Initialize the GLX extension.
-*/
-void GlxExtensionInit(void)
-{
- ExtensionEntry *extEntry;
- ScreenPtr pScreen;
- int i;
- __GLXprovider *p;
- Bool glx_provided = False;
-
- __glXContextRes = CreateNewResourceType((DeleteType)ContextGone,
- "GLXContext");
- __glXDrawableRes = CreateNewResourceType((DeleteType)DrawableGone,
- "GLXDrawable");
- if (!__glXContextRes || !__glXDrawableRes)
- return;
-
- if (!dixRegisterPrivateKey(&glxClientPrivateKeyRec, PRIVATE_CLIENT, sizeof (__GLXclientState)))
- return;
- if (!AddCallback (&ClientStateCallback, glxClientCallback, 0))
- return;
-
- for (i = 0; i < screenInfo.numScreens; i++) {
- pScreen = screenInfo.screens[i];
-
- for (p = __glXProviderStack; p != NULL; p = p->next) {
- __GLXscreen *glxScreen;
-
- glxScreen = p->screenProbe(pScreen);
- if (glxScreen != NULL) {
- if (glxScreen->GLXminor < glxMinorVersion)
- glxMinorVersion = glxScreen->GLXminor;
- LogMessage(X_INFO,
- "GLX: Initialized %s GL provider for screen %d\n",
- p->name, i);
- break;
- }
-
- }
-
- if (!p)
- LogMessage(X_INFO,
- "GLX: no usable GL providers found for screen %d\n", i);
- else
- glx_provided = True;
- }
-
- /* don't register extension if GL is not provided on any screen */
- if (!glx_provided)
- return;
-
- /*
- ** Add extension to server extensions.
- */
- extEntry = AddExtension(GLX_EXTENSION_NAME, __GLX_NUMBER_EVENTS,
- __GLX_NUMBER_ERRORS, __glXDispatch,
- __glXDispatch, ResetExtension,
- StandardMinorOpcode);
- if (!extEntry) {
- FatalError("__glXExtensionInit: AddExtensions failed\n");
- return;
- }
- if (!AddExtensionAlias(GLX_EXTENSION_ALIAS, extEntry)) {
- ErrorF("__glXExtensionInit: AddExtensionAlias failed\n");
- return;
- }
-
- __glXErrorBase = extEntry->errorBase;
- __glXEventBase = extEntry->eventBase;
-}
-
-/************************************************************************/
-
-void __glXFlushContextCache(void)
-{
- __glXLastContext = 0;
-}
-
-/*
-** Make a context the current one for the GL (in this implementation, there
-** is only one instance of the GL, and we use it to serve all GL clients by
-** switching it between different contexts). While we are at it, look up
-** a context by its tag and return its (__GLXcontext *).
-*/
-__GLXcontext *__glXForceCurrent(__GLXclientState *cl, GLXContextTag tag,
- int *error)
-{
- __GLXcontext *cx;
-
- /*
- ** See if the context tag is legal; it is managed by the extension,
- ** so if it's invalid, we have an implementation error.
- */
- cx = __glXLookupContextByTag(cl, tag);
- if (!cx) {
- cl->client->errorValue = tag;
- *error = __glXError(GLXBadContextTag);
- return 0;
- }
-
- if (!cx->isDirect) {
- if (cx->drawPriv == NULL) {
- /*
- ** The drawable has vanished. It must be a window, because only
- ** windows can be destroyed from under us; GLX pixmaps are
- ** refcounted and don't go away until no one is using them.
- */
- *error = __glXError(GLXBadCurrentWindow);
- return 0;
- }
- }
-
- if (cx->wait && (*cx->wait)(cx, cl, error))
- return NULL;
-
- if (cx == __glXLastContext) {
- /* No need to re-bind */
- return cx;
- }
-
- /* Make this context the current one for the GL. */
- if (!cx->isDirect) {
- if (!(*cx->makeCurrent)(cx)) {
- /* Bind failed, and set the error code. Bummer */
- cl->client->errorValue = cx->id;
- *error = __glXError(GLXBadContextState);
- return 0;
- }
- }
- __glXLastContext = cx;
- return cx;
-}
-
-/************************************************************************/
-
-void glxSuspendClients(void)
-{
- int i;
-
- for (i = 1; i < currentMaxClients; i++) {
- if (clients[i] && glxGetClient(clients[i])->inUse)
- IgnoreClient(clients[i]);
- }
-
- glxBlockClients = TRUE;
-}
-
-void glxResumeClients(void)
-{
- __GLXcontext *cx, *next;
- int i;
-
- glxBlockClients = FALSE;
-
- for (i = 1; i < currentMaxClients; i++) {
- if (clients[i] && glxGetClient(clients[i])->inUse)
- AttendClient(clients[i]);
- }
-
- __glXleaveServer(GL_FALSE);
- for (cx = glxPendingDestroyContexts; cx != NULL; cx = next) {
- next = cx->next;
-
- cx->destroy(cx);
- }
- glxPendingDestroyContexts = NULL;
- __glXenterServer(GL_FALSE);
-}
-
-static void
-__glXnopEnterServer(GLboolean rendering)
-{
-}
-
-static void
-__glXnopLeaveServer(GLboolean rendering)
-{
-}
-
-static void (*__glXenterServerFunc)(GLboolean) = __glXnopEnterServer;
-static void (*__glXleaveServerFunc)(GLboolean) = __glXnopLeaveServer;
-
-void __glXsetEnterLeaveServerFuncs(void (*enter)(GLboolean),
- void (*leave)(GLboolean))
-{
- __glXenterServerFunc = enter;
- __glXleaveServerFunc = leave;
-}
-
-
-void __glXenterServer(GLboolean rendering)
-{
- glxServerLeaveCount--;
-
- if (glxServerLeaveCount == 0)
- (*__glXenterServerFunc)(rendering);
-}
-
-void __glXleaveServer(GLboolean rendering)
-{
- if (glxServerLeaveCount == 0)
- (*__glXleaveServerFunc)(rendering);
-
- glxServerLeaveCount++;
-}
-
-/*
-** Top level dispatcher; all commands are executed from here down.
-*/
-static int __glXDispatch(ClientPtr client)
-{
- REQUEST(xGLXSingleReq);
- CARD8 opcode;
- __GLXdispatchSingleProcPtr proc;
- __GLXclientState *cl;
- int retval;
-
- opcode = stuff->glxCode;
- cl = glxGetClient(client);
- /* Mark it in use so we suspend it on VT switch. */
- cl->inUse = TRUE;
-
- /*
- ** If we're expecting a glXRenderLarge request, this better be one.
- */
- if ((cl->largeCmdRequestsSoFar != 0) && (opcode != X_GLXRenderLarge)) {
- client->errorValue = stuff->glxCode;
- return __glXError(GLXBadLargeRequest);
- }
-
- /* If we're currently blocking GLX clients, just put this guy to
- * sleep, reset the request and return. */
- if (glxBlockClients) {
- ResetCurrentRequest(client);
- client->sequence--;
- IgnoreClient(client);
- return Success;
- }
-
- /*
- ** Use the opcode to index into the procedure table.
- */
- proc = __glXGetProtocolDecodeFunction(& Single_dispatch_info, opcode,
- client->swapped);
- if (proc != NULL) {
- GLboolean rendering = opcode <= X_GLXRenderLarge;
- __glXleaveServer(rendering);
-
- retval = (*proc)(cl, (GLbyte *) stuff);
-
- __glXenterServer(rendering);
- }
- else {
- retval = BadRequest;
- }
-
- return retval;
-}
+/*
+ * 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.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+#include "glxserver.h"
+#include <windowstr.h>
+#include <propertyst.h>
+#include <registry.h>
+#include "privates.h"
+#include <os.h>
+#include "unpack.h"
+#include "glxutil.h"
+#include "glxext.h"
+#include "indirect_table.h"
+#include "indirect_util.h"
+
+/*
+** The last context used by the server. It is the context that is current
+** from the server's perspective.
+*/
+__GLXcontext *__glXLastContext;
+
+/*
+** X resources.
+*/
+RESTYPE __glXContextRes;
+RESTYPE __glXDrawableRes;
+
+/*
+** Reply for most singles.
+*/
+xGLXSingleReply __glXReply;
+
+static DevPrivateKeyRec glxClientPrivateKeyRec;
+#define glxClientPrivateKey (&glxClientPrivateKeyRec)
+
+/*
+** Forward declarations.
+*/
+static int __glXDispatch(ClientPtr);
+
+/*
+** Called when the extension is reset.
+*/
+static void ResetExtension(ExtensionEntry* extEntry)
+{
+ __glXFlushContextCache();
+}
+
+/*
+** Reset state used to keep track of large (multi-request) commands.
+*/
+void __glXResetLargeCommandStatus(__GLXclientState *cl)
+{
+ cl->largeCmdBytesSoFar = 0;
+ cl->largeCmdBytesTotal = 0;
+ cl->largeCmdRequestsSoFar = 0;
+ cl->largeCmdRequestsTotal = 0;
+}
+
+/*
+** This procedure is called when the client who created the context goes
+** away OR when glXDestroyContext is called. In either case, all we do is
+** flag that the ID is no longer valid, and (maybe) free the context.
+** use.
+*/
+static int ContextGone(__GLXcontext* cx, XID id)
+{
+ cx->idExists = GL_FALSE;
+ if (!cx->isCurrent) {
+ __glXFreeContext(cx);
+ }
+
+ return True;
+}
+
+static __GLXcontext *glxPendingDestroyContexts;
+static __GLXcontext *glxAllContexts;
+static int glxServerLeaveCount;
+static int glxBlockClients;
+
+/*
+** Destroy routine that gets called when a drawable is freed. A drawable
+** contains the ancillary buffers needed for rendering.
+*/
+static Bool DrawableGone(__GLXdrawable *glxPriv, XID xid)
+{
+ __GLXcontext *c, *next;
+
+ if (glxPriv->type == GLX_DRAWABLE_WINDOW) {
+ /* If this was created by glXCreateWindow, free the matching resource */
+ if (glxPriv->drawId != glxPriv->pDraw->id) {
+ if (xid == glxPriv->drawId)
+ FreeResourceByType(glxPriv->pDraw->id, __glXDrawableRes, TRUE);
+ else
+ FreeResourceByType(glxPriv->drawId, __glXDrawableRes, TRUE);
+ }
+ /* otherwise this window was implicitly created by MakeCurrent */
+ }
+
+ for (c = glxAllContexts; c; c = next) {
+ next = c->next;
+ if (c->isCurrent && (c->drawPriv == glxPriv || c->readPriv == glxPriv)) {
+ (*c->loseCurrent)(c);
+ c->isCurrent = GL_FALSE;
+ if (c == __glXLastContext)
+ __glXFlushContextCache();
+ }
+ if (c->drawPriv == glxPriv)
+ c->drawPriv = NULL;
+ if (c->readPriv == glxPriv)
+ c->readPriv = NULL;
+ }
+
+ /* drop our reference to any backing pixmap */
+ if (glxPriv->type == GLX_DRAWABLE_PIXMAP)
+ glxPriv->pDraw->pScreen->DestroyPixmap((PixmapPtr)glxPriv->pDraw);
+
+ glxPriv->destroy(glxPriv);
+
+ return True;
+}
+
+void __glXAddToContextList(__GLXcontext *cx)
+{
+ cx->next = glxAllContexts;
+ glxAllContexts = cx;
+}
+
+static void __glXRemoveFromContextList(__GLXcontext *cx)
+{
+ __GLXcontext *c, *prev;
+
+ if (cx == glxAllContexts)
+ glxAllContexts = cx->next;
+ else {
+ prev = glxAllContexts;
+ for (c = glxAllContexts; c; c = c->next) {
+ if (c == cx)
+ prev->next = c->next;
+ prev = c;
+ }
+ }
+}
+
+/*
+** Free a context.
+*/
+GLboolean __glXFreeContext(__GLXcontext *cx)
+{
+ if (cx->idExists || cx->isCurrent) return GL_FALSE;
+
+ free(cx->feedbackBuf);
+ free(cx->selectBuf);
+ if (cx == __glXLastContext) {
+ __glXFlushContextCache();
+ }
+
+ __glXRemoveFromContextList(cx);
+
+ /* We can get here through both regular dispatching from
+ * __glXDispatch() or as a callback from the resource manager. In
+ * the latter case we need to lift the DRI lock manually. */
+
+ if (!glxBlockClients) {
+ __glXleaveServer(GL_FALSE);
+ cx->destroy(cx);
+ __glXenterServer(GL_FALSE);
+ } else {
+ cx->next = glxPendingDestroyContexts;
+ glxPendingDestroyContexts = cx;
+ }
+
+ return GL_TRUE;
+}
+
+/************************************************************************/
+
+/*
+** These routines can be used to check whether a particular GL command
+** has caused an error. Specifically, we use them to check whether a
+** given query has caused an error, in which case a zero-length data
+** reply is sent to the client.
+*/
+
+static GLboolean errorOccured = GL_FALSE;
+
+/*
+** The GL was will call this routine if an error occurs.
+*/
+void __glXErrorCallBack(GLenum code)
+{
+ errorOccured = GL_TRUE;
+}
+
+/*
+** Clear the error flag before calling the GL command.
+*/
+void __glXClearErrorOccured(void)
+{
+ errorOccured = GL_FALSE;
+}
+
+/*
+** Check if the GL command caused an error.
+*/
+GLboolean __glXErrorOccured(void)
+{
+ return errorOccured;
+}
+
+static int __glXErrorBase;
+int __glXEventBase;
+
+int __glXError(int error)
+{
+ return __glXErrorBase + error;
+}
+
+__GLXclientState *
+glxGetClient(ClientPtr pClient)
+{
+ return dixLookupPrivate(&pClient->devPrivates, glxClientPrivateKey);
+}
+
+static void
+glxClientCallback (CallbackListPtr *list,
+ pointer closure,
+ pointer data)
+{
+ NewClientInfoRec *clientinfo = (NewClientInfoRec *) data;
+ ClientPtr pClient = clientinfo->client;
+ __GLXclientState *cl = glxGetClient(pClient);
+
+ switch (pClient->clientState) {
+ case ClientStateRunning:
+ /*
+ ** By default, assume that the client supports
+ ** GLX major version 1 minor version 0 protocol.
+ */
+ cl->GLClientmajorVersion = 1;
+ cl->GLClientminorVersion = 0;
+ cl->client = pClient;
+ break;
+
+ case ClientStateGone:
+ free(cl->returnBuf);
+ free(cl->largeCmdBuf);
+ free(cl->GLClientextensions);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/************************************************************************/
+
+static __GLXprovider *__glXProviderStack;
+
+void GlxPushProvider(__GLXprovider *provider)
+{
+ provider->next = __glXProviderStack;
+ __glXProviderStack = provider;
+}
+
+/*
+** Initialize the GLX extension.
+*/
+void GlxExtensionInit(void)
+{
+ ExtensionEntry *extEntry;
+ ScreenPtr pScreen;
+ int i;
+ __GLXprovider *p;
+ Bool glx_provided = False;
+
+ __glXContextRes = CreateNewResourceType((DeleteType)ContextGone,
+ "GLXContext");
+ __glXDrawableRes = CreateNewResourceType((DeleteType)DrawableGone,
+ "GLXDrawable");
+ if (!__glXContextRes || !__glXDrawableRes)
+ return;
+
+ if (!dixRegisterPrivateKey(&glxClientPrivateKeyRec, PRIVATE_CLIENT, sizeof (__GLXclientState)))
+ return;
+ if (!AddCallback (&ClientStateCallback, glxClientCallback, 0))
+ return;
+
+ for (i = 0; i < screenInfo.numScreens; i++) {
+ pScreen = screenInfo.screens[i];
+
+ for (p = __glXProviderStack; p != NULL; p = p->next) {
+ __GLXscreen *glxScreen;
+
+ glxScreen = p->screenProbe(pScreen);
+ if (glxScreen != NULL) {
+ if (glxScreen->GLXminor < glxMinorVersion)
+ glxMinorVersion = glxScreen->GLXminor;
+ LogMessage(X_INFO,
+ "GLX: Initialized %s GL provider for screen %d\n",
+ p->name, i);
+ break;
+ }
+
+ }
+
+ if (!p)
+ LogMessage(X_INFO,
+ "GLX: no usable GL providers found for screen %d\n", i);
+ else
+ glx_provided = True;
+ }
+
+ /* don't register extension if GL is not provided on any screen */
+ if (!glx_provided)
+ return;
+
+ /*
+ ** Add extension to server extensions.
+ */
+ extEntry = AddExtension(GLX_EXTENSION_NAME, __GLX_NUMBER_EVENTS,
+ __GLX_NUMBER_ERRORS, __glXDispatch,
+ __glXDispatch, ResetExtension,
+ StandardMinorOpcode);
+ if (!extEntry) {
+ FatalError("__glXExtensionInit: AddExtensions failed\n");
+ return;
+ }
+ if (!AddExtensionAlias(GLX_EXTENSION_ALIAS, extEntry)) {
+ ErrorF("__glXExtensionInit: AddExtensionAlias failed\n");
+ return;
+ }
+
+ __glXErrorBase = extEntry->errorBase;
+ __glXEventBase = extEntry->eventBase;
+}
+
+/************************************************************************/
+
+void __glXFlushContextCache(void)
+{
+ __glXLastContext = 0;
+}
+
+/*
+** Make a context the current one for the GL (in this implementation, there
+** is only one instance of the GL, and we use it to serve all GL clients by
+** switching it between different contexts). While we are at it, look up
+** a context by its tag and return its (__GLXcontext *).
+*/
+__GLXcontext *__glXForceCurrent(__GLXclientState *cl, GLXContextTag tag,
+ int *error)
+{
+ __GLXcontext *cx;
+
+ /*
+ ** See if the context tag is legal; it is managed by the extension,
+ ** so if it's invalid, we have an implementation error.
+ */
+ cx = __glXLookupContextByTag(cl, tag);
+ if (!cx) {
+ cl->client->errorValue = tag;
+ *error = __glXError(GLXBadContextTag);
+ return 0;
+ }
+
+ if (!cx->isDirect) {
+ if (cx->drawPriv == NULL) {
+ /*
+ ** The drawable has vanished. It must be a window, because only
+ ** windows can be destroyed from under us; GLX pixmaps are
+ ** refcounted and don't go away until no one is using them.
+ */
+ *error = __glXError(GLXBadCurrentWindow);
+ return 0;
+ }
+ }
+
+ if (cx->wait && (*cx->wait)(cx, cl, error))
+ return NULL;
+
+ if (cx == __glXLastContext) {
+ /* No need to re-bind */
+ return cx;
+ }
+
+ /* Make this context the current one for the GL. */
+ if (!cx->isDirect) {
+ if (!(*cx->makeCurrent)(cx)) {
+ /* Bind failed, and set the error code. Bummer */
+ cl->client->errorValue = cx->id;
+ *error = __glXError(GLXBadContextState);
+ return 0;
+ }
+ }
+ __glXLastContext = cx;
+ return cx;
+}
+
+/************************************************************************/
+
+void glxSuspendClients(void)
+{
+ int i;
+
+ for (i = 1; i < currentMaxClients; i++) {
+ if (clients[i] && glxGetClient(clients[i])->inUse)
+ IgnoreClient(clients[i]);
+ }
+
+ glxBlockClients = TRUE;
+}
+
+void glxResumeClients(void)
+{
+ __GLXcontext *cx, *next;
+ int i;
+
+ glxBlockClients = FALSE;
+
+ for (i = 1; i < currentMaxClients; i++) {
+ if (clients[i] && glxGetClient(clients[i])->inUse)
+ AttendClient(clients[i]);
+ }
+
+ __glXleaveServer(GL_FALSE);
+ for (cx = glxPendingDestroyContexts; cx != NULL; cx = next) {
+ next = cx->next;
+
+ cx->destroy(cx);
+ }
+ glxPendingDestroyContexts = NULL;
+ __glXenterServer(GL_FALSE);
+}
+
+static void
+__glXnopEnterServer(GLboolean rendering)
+{
+}
+
+static void
+__glXnopLeaveServer(GLboolean rendering)
+{
+}
+
+static void (*__glXenterServerFunc)(GLboolean) = __glXnopEnterServer;
+static void (*__glXleaveServerFunc)(GLboolean) = __glXnopLeaveServer;
+
+void __glXsetEnterLeaveServerFuncs(void (*enter)(GLboolean),
+ void (*leave)(GLboolean))
+{
+ __glXenterServerFunc = enter;
+ __glXleaveServerFunc = leave;
+}
+
+
+void __glXenterServer(GLboolean rendering)
+{
+ glxServerLeaveCount--;
+
+ if (glxServerLeaveCount == 0)
+ (*__glXenterServerFunc)(rendering);
+}
+
+void __glXleaveServer(GLboolean rendering)
+{
+ if (glxServerLeaveCount == 0)
+ (*__glXleaveServerFunc)(rendering);
+
+ glxServerLeaveCount++;
+}
+
+/*
+** Top level dispatcher; all commands are executed from here down.
+*/
+static int __glXDispatch(ClientPtr client)
+{
+ REQUEST(xGLXSingleReq);
+ CARD8 opcode;
+ __GLXdispatchSingleProcPtr proc;
+ __GLXclientState *cl;
+ int retval;
+
+ opcode = stuff->glxCode;
+ cl = glxGetClient(client);
+ /* Mark it in use so we suspend it on VT switch. */
+ cl->inUse = TRUE;
+
+ /*
+ ** If we're expecting a glXRenderLarge request, this better be one.
+ */
+ if ((cl->largeCmdRequestsSoFar != 0) && (opcode != X_GLXRenderLarge)) {
+ client->errorValue = stuff->glxCode;
+ return __glXError(GLXBadLargeRequest);
+ }
+
+ /* If we're currently blocking GLX clients, just put this guy to
+ * sleep, reset the request and return. */
+ if (glxBlockClients) {
+ ResetCurrentRequest(client);
+ client->sequence--;
+ IgnoreClient(client);
+ return Success;
+ }
+
+ /*
+ ** Use the opcode to index into the procedure table.
+ */
+ proc = __glXGetProtocolDecodeFunction(& Single_dispatch_info, opcode,
+ client->swapped);
+ if (proc != NULL) {
+ GLboolean rendering = opcode <= X_GLXRenderLarge;
+ __glXleaveServer(rendering);
+
+ retval = (*proc)(cl, (GLbyte *) stuff);
+
+ __glXenterServer(rendering);
+ }
+ else {
+ retval = BadRequest;
+ }
+
+ return retval;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 14:59:19 +0000