diff options
Diffstat (limited to 'xorg-server/glx/glxext.c')
| -rw-r--r-- | xorg-server/glx/glxext.c | 1128 |
1 files changed, 564 insertions, 564 deletions
diff --git a/xorg-server/glx/glxext.c b/xorg-server/glx/glxext.c index 043e54d78..d23d10059 100644 --- a/xorg-server/glx/glxext.c +++ b/xorg-server/glx/glxext.c @@ -1,564 +1,564 @@ -/*
- * 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>
-#else
-
-#include "glheader.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"
-
-extern void FlushContext(__GLXcontext *cx);
-
-/*
-** 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)) {
- FlushContext(c);
-
- (*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;
-}
+/* + * 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> +#else + +#include "glheader.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" + +extern void FlushContext(__GLXcontext *cx); + +/* +** 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)) { + FlushContext(c); + + (*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; +} |