Move GL/glx on level up now that it's the only thing left under GL.

1 files changed, 2383 insertions, 0 deletions

diff --git a/glx/glxcmds.c b/glx/glxcmds.c
new file mode 100644
index 000000000..dcd83525f
--- /dev/null
+++ b/glx/glxcmds.c
@@ -0,0 +1,2383 @@
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+** 
+** http://oss.sgi.com/projects/FreeB
+** 
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+** 
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+** 
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#define NEED_REPLIES
+#define FONT_PCF
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+#include <assert.h>
+
+#include "glxserver.h"
+#include <GL/glxtokens.h>
+#include <unpack.h>
+#include "g_disptab.h"
+#include <pixmapstr.h>
+#include <windowstr.h>
+#include "glxutil.h"
+#include "glxext.h"
+#include "glapitable.h"
+#include "glapi.h"
+#include "glthread.h"
+#include "dispatch.h"
+#include "indirect_dispatch.h"
+#include "indirect_table.h"
+#include "indirect_util.h"
+
+void
+GlxSetRenderTables (struct _glapi_table *table)
+{
+    _glapi_set_dispatch (table);
+}
+
+static int
+validGlxScreen(ClientPtr client, int screen, __GLXscreen **pGlxScreen, int *err)
+{
+    /*
+    ** Check if screen exists.
+    */
+    if (screen >= screenInfo.numScreens) {
+	client->errorValue = screen;
+	*err = BadValue;
+	return FALSE;
+    }
+    *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+
+    return TRUE;
+}
+
+static int
+validGlxFBConfig(ClientPtr client, __GLXscreen *pGlxScreen, XID id,
+		 __GLXconfig **config, int *err)
+{
+    __GLXconfig *m;
+
+    for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next)
+	if (m->fbconfigID == id) {
+	    *config = m;
+	    return TRUE;
+	}
+
+    client->errorValue = id;
+    *err = __glXError(GLXBadFBConfig);
+
+    return FALSE;
+}
+
+static int
+validGlxVisual(ClientPtr client, __GLXscreen *pGlxScreen, XID id,
+	       __GLXconfig **config, int *err)
+{
+    int i;
+
+    for (i = 0; i < pGlxScreen->numVisuals; i++)
+ 	if (pGlxScreen->visuals[i]->visualID == id) {
+	    *config = pGlxScreen->visuals[i];
+	    return TRUE;
+	}
+
+    client->errorValue = id;
+    *err = BadValue;
+
+    return FALSE;
+}
+
+static int
+validGlxFBConfigForWindow(ClientPtr client, __GLXconfig *config,
+			  DrawablePtr pDraw, int *err)
+{
+    ScreenPtr pScreen = pDraw->pScreen;
+    VisualPtr pVisual = NULL;
+    XID vid;
+    int i;
+
+    vid = wVisual((WindowPtr)pDraw);
+    for (i = 0; i < pScreen->numVisuals; i++) {
+	if (pScreen->visuals[i].vid == vid) {
+	    pVisual = &pScreen->visuals[i];
+	    break;
+	}
+    }
+
+    /* FIXME: What exactly should we check here... */
+    if (pVisual->class != glxConvertToXVisualType(config->visualType) ||
+	!(config->drawableType & GLX_WINDOW_BIT)) {
+	client->errorValue = pDraw->id;
+	*err = BadMatch;
+	return FALSE;
+    }
+
+    return TRUE;
+}
+
+void
+__glXContextDestroy(__GLXcontext *context)
+{
+    if (!context->isDirect)
+	__glXDeassociateContext(context);
+    __glXFlushContextCache();
+}
+
+
+static void __glXdirectContextDestroy(__GLXcontext *context)
+{
+    __glXContextDestroy(context);
+    xfree(context);
+}
+
+static __GLXcontext *__glXdirectContextCreate(__GLXscreen *screen,
+					      __GLXconfig *modes,
+					      __GLXcontext *shareContext)
+{
+    __GLXcontext *context;
+
+    context = xalloc (sizeof (__GLXcontext));
+    if (context == NULL)
+	return NULL;
+
+    memset(context, 0, sizeof *context);
+    context->destroy = __glXdirectContextDestroy;
+
+    return context;
+}
+
+/**
+ * Create a GL context with the given properties.  This routine is used
+ * to implement \c glXCreateContext, \c glXCreateNewContext, and
+ * \c glXCreateContextWithConfigSGIX.  This works becuase of the hack way
+ * that GLXFBConfigs are implemented.  Basically, the FBConfigID is the
+ * same as the VisualID.
+ */
+
+static int
+DoCreateContext(__GLXclientState *cl, GLXContextID gcId,
+		GLXContextID shareList, __GLXconfig *config,
+		__GLXscreen *pGlxScreen, GLboolean isDirect)
+{
+    ClientPtr client = cl->client;
+    __GLXcontext *glxc, *shareglxc;
+
+    LEGAL_NEW_RESOURCE(gcId, client);
+
+    /*
+    ** Find the display list space that we want to share.  
+    **
+    ** NOTE: In a multithreaded X server, we would need to keep a reference
+    ** count for each display list so that if one client detroyed a list that 
+    ** another client was using, the list would not really be freed until it 
+    ** was no longer in use.  Since this sample implementation has no support 
+    ** for multithreaded servers, we don't do this.  
+    */
+    if (shareList == None) {
+	shareglxc = 0;
+    } else {
+	shareglxc = (__GLXcontext *) LookupIDByType(shareList, __glXContextRes);
+	if (!shareglxc) {
+	    client->errorValue = shareList;
+	    return __glXError(GLXBadContext);
+	}
+	if (shareglxc->isDirect) {
+	    /*
+	    ** NOTE: no support for sharing display lists between direct
+	    ** contexts, even if they are in the same address space.
+	    */
+#if 0
+            /* Disabling this code seems to allow shared display lists
+             * and texture objects to work.  We'll leave it disabled for now.
+             */
+	    client->errorValue = shareList;
+	    return BadMatch;
+#endif
+	} else {
+	    /*
+	    ** Create an indirect context regardless of what the client asked
+	    ** for; this way we can share display list space with shareList.
+	    */
+	    isDirect = GL_FALSE;
+	}
+    }
+
+    /*
+    ** Allocate memory for the new context
+    */
+    if (!isDirect)
+	glxc = pGlxScreen->createContext(pGlxScreen, config, shareglxc);
+    else
+	glxc = __glXdirectContextCreate(pGlxScreen, config, shareglxc);
+    if (!glxc) {
+	return BadAlloc;
+    }
+
+    /*
+    ** Initially, setup the part of the context that could be used by
+    ** a GL core that needs windowing information (e.g., Mesa).
+    */
+    glxc->pGlxScreen = pGlxScreen;
+    glxc->config = config;
+
+    /*
+    ** Register this context as a resource.
+    */
+    if (!AddResource(gcId, __glXContextRes, (pointer)glxc)) {
+	(*glxc->destroy)(glxc);
+	client->errorValue = gcId;
+	return BadAlloc;
+    }
+    
+    /*
+    ** Finally, now that everything is working, setup the rest of the
+    ** context.
+    */
+    glxc->id = gcId;
+    glxc->share_id = shareList;
+    glxc->idExists = GL_TRUE;
+    glxc->isCurrent = GL_FALSE;
+    glxc->isDirect = isDirect;
+    glxc->renderMode = GL_RENDER;
+
+    return Success;
+}
+
+int __glXDisp_CreateContext(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateContextReq *req = (xGLXCreateContextReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxVisual(cl->client, pGlxScreen, req->visual, &config, &err))
+	return err;
+
+    return DoCreateContext(cl, req->context, req->shareList,
+			   config, pGlxScreen, req->isDirect);
+}
+
+int __glXDisp_CreateNewContext(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateNewContextReq *req = (xGLXCreateNewContextReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(cl->client, pGlxScreen, req->fbconfig, &config, &err))
+	return err;
+
+    return DoCreateContext(cl, req->context, req->shareList,
+			   config, pGlxScreen, req->isDirect);
+}
+
+int __glXDisp_CreateContextWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateContextWithConfigSGIXReq *req = 
+	(xGLXCreateContextWithConfigSGIXReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(cl->client, pGlxScreen, req->fbconfig, &config, &err))
+	return err;
+
+    return DoCreateContext(cl, req->context, req->shareList,
+			   config, pGlxScreen, req->isDirect);
+}
+int __glXDisp_DestroyContext(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyContextReq *req = (xGLXDestroyContextReq *) pc;
+    GLXContextID gcId = req->context;
+    __GLXcontext *glxc;
+    
+    glxc = (__GLXcontext *) LookupIDByType(gcId, __glXContextRes);
+    if (glxc) {
+	/*
+	** Just free the resource; don't actually destroy the context,
+	** because it might be in use.  The
+	** destroy method will be called by the resource destruction routine
+	** if necessary.
+	*/
+	FreeResourceByType(gcId, __glXContextRes, FALSE);
+	return Success;
+    } else {
+	client->errorValue = gcId;
+	return __glXError(GLXBadContext);
+    }
+}
+
+/*****************************************************************************/
+
+/*
+** For each client, the server keeps a table of all the contexts that are
+** current for that client (each thread of a client may have its own current
+** context).  These routines add, change, and lookup contexts in the table.
+*/
+
+/*
+** Add a current context, and return the tag that will be used to refer to it.
+*/
+static int AddCurrentContext(__GLXclientState *cl, __GLXcontext *glxc)
+{
+    int i;
+    int num = cl->numCurrentContexts;
+    __GLXcontext **table = cl->currentContexts;
+
+    if (!glxc) return -1;
+    
+    /*
+    ** Try to find an empty slot and use it.
+    */
+    for (i=0; i < num; i++) {
+	if (!table[i]) {
+	    table[i] = glxc;
+	    return i+1;
+	}
+    }
+    /*
+    ** Didn't find a free slot, so we'll have to grow the table.
+    */
+    if (!num) {
+	table = (__GLXcontext **) xalloc(sizeof(__GLXcontext *));
+    } else {
+	table = (__GLXcontext **) xrealloc(table,
+					   (num+1)*sizeof(__GLXcontext *));
+    }
+    table[num] = glxc;
+    cl->currentContexts = table;
+    cl->numCurrentContexts++;
+    return num+1;
+}
+
+/*
+** Given a tag, change the current context for the corresponding entry.
+*/
+static void ChangeCurrentContext(__GLXclientState *cl, __GLXcontext *glxc,
+				GLXContextTag tag)
+{
+    __GLXcontext **table = cl->currentContexts;
+    table[tag-1] = glxc;
+}
+
+/*
+** For this implementation we have chosen to simply use the index of the
+** context's entry in the table as the context tag.  A tag must be greater
+** than 0.
+*/
+__GLXcontext *__glXLookupContextByTag(__GLXclientState *cl, GLXContextTag tag)
+{
+    int num = cl->numCurrentContexts;
+
+    if (tag < 1 || tag > num) {
+	return 0;
+    } else {
+	return cl->currentContexts[tag-1];
+    }
+}
+
+/*****************************************************************************/
+
+static void StopUsingContext(__GLXcontext *glxc)
+{
+    if (glxc) {
+	if (glxc == __glXLastContext) {
+	    /* Tell server GL library */
+	    __glXLastContext = 0;
+	}
+	glxc->isCurrent = GL_FALSE;
+	if (!glxc->idExists) {
+	    __glXFreeContext(glxc);
+	}
+    }
+}
+
+static void StartUsingContext(__GLXclientState *cl, __GLXcontext *glxc)
+{
+    glxc->isCurrent = GL_TRUE;
+}
+
+/**
+ * Given a drawable ID, get the associated drawable and / or pixmap.
+ * 
+ * If the specified drawable ID is not a pixmap, \c ppPixmap will be set
+ * to \c NULL on return.  In either case, \c ppDraw will be set to a drawable.
+ * In the case where the drawable ID is a pixmap, \c ppDraw will be set to
+ * the drawable associated with that pixmap.
+ *
+ * \param glxc      Associated GLX context.
+ * \param drawId    ID of the drawable.
+ * \param client    Pointer to the client state.
+ * \return  the __GLXdrawable is returned on success.  Otherwise NULL.
+ * 
+ * \notes This function will need some modification when support pbuffers
+ *        is added.
+ */
+static __GLXdrawable *
+__glXGetDrawable(__GLXcontext *glxc, GLXDrawable drawId, ClientPtr client,
+		 int *error)
+{
+    DrawablePtr pDraw;
+    __GLXdrawable *pGlxDraw;
+    int rc;
+
+    /* This is the GLX 1.3 case - the client passes in a GLXWindow or
+     * GLXPixmap and we just return the __GLXdrawable.  */
+    pGlxDraw = (__GLXdrawable *) LookupIDByType(drawId, __glXDrawableRes);
+    if (pGlxDraw != NULL) {
+	if (glxc != NULL && pGlxDraw->config != glxc->config) {
+	    client->errorValue = drawId;
+	    *error = BadMatch;
+	    return NULL;
+	}
+
+	return pGlxDraw;
+    }
+
+    /* The drawId wasn't a GLX drawable, so presumably it's a regular
+     * X window.  In that case, we create a shadow GLXWindow for it on
+     * demand here for pre GLX 1.3 compatibility and use the X Window
+     * XID as its GLXWindow XID.  The client can't explicitly create a
+     * GLXWindow with the same XID as an X Window, so we wont get any
+     * resource ID clashes.  Effectively, the X Window is now also a
+     * GLXWindow. */
+
+    rc = dixLookupDrawable(&pDraw, drawId, client, 0, DixGetAttrAccess);
+    if (rc != Success || pDraw->type != DRAWABLE_WINDOW) {
+	client->errorValue = drawId;
+	*error = __glXError(GLXBadDrawable);
+	return NULL;
+    }
+
+    /* If we're not given a context, don't create the __GLXdrawable */
+    if (glxc == NULL) {
+	*error = __glXError(GLXBadDrawable);
+	return NULL;
+    }
+
+    /* We're binding an X Window for the first time and need to create
+     * a GLX drawable for it.  Check that the drawable screen matches
+     * the context screen and that the context fbconfig is compatible
+     * with the window visual. */
+    if (pDraw->pScreen != glxc->pGlxScreen->pScreen ||
+	!validGlxFBConfigForWindow(client, glxc->config, pDraw, error))
+	return NULL;
+
+    pGlxDraw = glxc->pGlxScreen->createDrawable(glxc->pGlxScreen,
+						pDraw, GLX_DRAWABLE_WINDOW,
+						drawId, glxc->config);
+
+    /* since we are creating the drawablePrivate, drawId should be new */
+    if (!AddResource(drawId, __glXDrawableRes, pGlxDraw)) {
+	pGlxDraw->destroy (pGlxDraw);
+	*error = BadAlloc;
+	return NULL;
+    }
+
+    return pGlxDraw;
+}
+
+/*****************************************************************************/
+/*
+** Make an OpenGL context and drawable current.
+*/
+
+static int
+DoMakeCurrent(__GLXclientState *cl,
+	      GLXDrawable drawId, GLXDrawable readId,
+	      GLXContextID contextId, GLXContextTag tag)
+{
+    ClientPtr client = cl->client;
+    xGLXMakeCurrentReply reply;
+    __GLXcontext *glxc, *prevglxc;
+    __GLXdrawable *drawPriv = NULL;
+    __GLXdrawable *readPriv = NULL;
+    GLint error;
+    GLuint  mask;
+
+    /*
+    ** If one is None and the other isn't, it's a bad match.
+    */
+
+    mask  = (drawId == None)    ? (1 << 0) : 0;
+    mask |= (readId == None)    ? (1 << 1) : 0;
+    mask |= (contextId == None) ? (1 << 2) : 0;
+
+    if ( (mask != 0x00) && (mask != 0x07) ) {
+	return BadMatch;
+    }
+    
+    /*
+    ** Lookup old context.  If we have one, it must be in a usable state.
+    */
+    if (tag != 0) {
+	prevglxc = __glXLookupContextByTag(cl, tag);
+	if (!prevglxc) {
+	    /*
+	    ** Tag for previous context is invalid.
+	    */
+	    return __glXError(GLXBadContextTag);
+	}
+	if (prevglxc->renderMode != GL_RENDER) {
+	    /* Oops.  Not in render mode render. */
+	    client->errorValue = prevglxc->id;
+	    return __glXError(GLXBadContextState);
+	}
+    } else {
+	prevglxc = 0;
+    }
+
+    /*
+    ** Lookup new context.  It must not be current for someone else.
+    */
+    if (contextId != None) {
+	int  status;
+
+	glxc = (__GLXcontext *) LookupIDByType(contextId, __glXContextRes);
+	if (!glxc) {
+	    client->errorValue = contextId;
+	    return __glXError(GLXBadContext);
+	}
+	if ((glxc != prevglxc) && glxc->isCurrent) {
+	    /* Context is current to somebody else */
+	    return BadAccess;
+	}
+
+	assert( drawId != None );
+	assert( readId != None );
+
+	drawPriv = __glXGetDrawable(glxc, drawId, client, &status);
+	if (drawPriv == NULL)
+	    return status;
+
+	readPriv = __glXGetDrawable(glxc, readId, client, &status);
+	if (readPriv == NULL)
+	    return status;
+
+    } else {
+	/* Switching to no context.  Ignore new drawable. */
+	glxc = 0;
+	drawPriv = 0;
+	readPriv = 0;
+    }
+
+
+    if (prevglxc) {
+	/*
+	** Flush the previous context if needed.
+	*/
+	if (__GLX_HAS_UNFLUSHED_CMDS(prevglxc)) {
+	    if (__glXForceCurrent(cl, tag, (int *)&error)) {
+		CALL_Flush( GET_DISPATCH(), () );
+		__GLX_NOTE_FLUSHED_CMDS(prevglxc);
+	    } else {
+		return error;
+	    }
+	}
+
+	/*
+	** Make the previous context not current.
+	*/
+	if (!(*prevglxc->loseCurrent)(prevglxc)) {
+	    return __glXError(GLXBadContext);
+	}
+	__glXFlushContextCache();
+	__glXDeassociateContext(prevglxc);
+    }
+	
+
+    if ((glxc != 0) && !glxc->isDirect) {
+
+	glxc->drawPriv = drawPriv;
+	glxc->readPriv = readPriv;
+
+	/* make the context current */
+	if (!(*glxc->makeCurrent)(glxc)) {
+	    glxc->drawPriv = NULL;
+	    glxc->readPriv = NULL;
+	    return __glXError(GLXBadContext);
+	}
+
+	/* resize the buffers */
+	if (!(*drawPriv->resize)(drawPriv)) {
+	    /* could not do initial resize.  make current failed */
+	    (*glxc->loseCurrent)(glxc);
+	    glxc->drawPriv = NULL;
+	    glxc->readPriv = NULL;
+	    return __glXError(GLXBadContext);
+	}
+
+	glxc->isCurrent = GL_TRUE;
+	__glXAssociateContext(glxc);
+	assert(drawPriv->drawGlxc == glxc);
+	assert(readPriv->readGlxc == glxc);
+    }
+
+    if (prevglxc) {
+	ChangeCurrentContext(cl, glxc, tag);
+	StopUsingContext(prevglxc);
+    } else {
+	tag = AddCurrentContext(cl, glxc);
+    }
+
+    if (glxc) {
+	StartUsingContext(cl, glxc);
+	reply.contextTag = tag;
+    } else {
+	reply.contextTag = 0;
+    }
+
+    reply.length = 0;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+	__glXSwapMakeCurrentReply(client, &reply);
+    } else {
+	WriteToClient(client, sz_xGLXMakeCurrentReply, (char *)&reply);
+    }
+    return Success;
+}
+
+int __glXDisp_MakeCurrent(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXMakeCurrentReq *req = (xGLXMakeCurrentReq *) pc;
+
+    return DoMakeCurrent( cl, req->drawable, req->drawable,
+			  req->context, req->oldContextTag );
+}
+
+int __glXDisp_MakeContextCurrent(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXMakeContextCurrentReq *req = (xGLXMakeContextCurrentReq *) pc;
+
+    return DoMakeCurrent( cl, req->drawable, req->readdrawable,
+			  req->context, req->oldContextTag );
+}
+
+int __glXDisp_MakeCurrentReadSGI(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXMakeCurrentReadSGIReq *req = (xGLXMakeCurrentReadSGIReq *) pc;
+
+    return DoMakeCurrent( cl, req->drawable, req->readable,
+			  req->context, req->oldContextTag );
+}
+
+int __glXDisp_IsDirect(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXIsDirectReq *req = (xGLXIsDirectReq *) pc;
+    xGLXIsDirectReply reply;
+    __GLXcontext *glxc;
+
+    /*
+    ** Find the GL context.
+    */
+    glxc = (__GLXcontext *) LookupIDByType(req->context, __glXContextRes);
+    if (!glxc) {
+	client->errorValue = req->context;
+	return __glXError(GLXBadContext);
+    }
+
+    reply.isDirect = glxc->isDirect;
+    reply.length = 0;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+	__glXSwapIsDirectReply(client, &reply);
+    } else {
+	WriteToClient(client, sz_xGLXIsDirectReply, (char *)&reply);
+    }
+
+    return Success;
+}
+
+int __glXDisp_QueryVersion(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryVersionReq *req = (xGLXQueryVersionReq *) pc;
+    xGLXQueryVersionReply reply;
+    GLuint major, minor;
+
+    major = req->majorVersion;
+    minor = req->minorVersion;
+    (void)major;
+    (void)minor;
+
+    /*
+    ** Server should take into consideration the version numbers sent by the
+    ** client if it wants to work with older clients; however, in this
+    ** implementation the server just returns its version number.
+    */
+    reply.majorVersion = GLX_SERVER_MAJOR_VERSION;
+    reply.minorVersion = GLX_SERVER_MINOR_VERSION;
+    reply.length = 0;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+	__glXSwapQueryVersionReply(client, &reply);
+    } else {
+	WriteToClient(client, sz_xGLXQueryVersionReply, (char *)&reply);
+    }
+    return Success;
+}
+
+int __glXDisp_WaitGL(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXWaitGLReq *req = (xGLXWaitGLReq *)pc;
+    int error;
+    
+    if (!__glXForceCurrent(cl, req->contextTag, &error)) {
+	return error;
+    }
+    CALL_Finish( GET_DISPATCH(), () );
+    return Success;
+}
+
+int __glXDisp_WaitX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXWaitXReq *req = (xGLXWaitXReq *)pc;
+    int error;
+    
+    if (!__glXForceCurrent(cl, req->contextTag, &error)) {
+	return error;
+    }
+    /*
+    ** In a multithreaded server that had separate X and GL threads, we would
+    ** have to wait for the X thread to finish before returning.  As it stands,
+    ** this sample implementation only supports singlethreaded servers, and
+    ** nothing needs to be done here.
+    */
+    return Success;
+}
+
+int __glXDisp_CopyContext(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCopyContextReq *req = (xGLXCopyContextReq *) pc;
+    GLXContextID source = req->source;
+    GLXContextID dest = req->dest;
+    GLXContextTag tag = req->contextTag;
+    unsigned long mask = req->mask;
+    __GLXcontext *src, *dst;
+    int error;
+
+    /*
+    ** Check that each context exists.
+    */
+    src = (__GLXcontext *) LookupIDByType(source, __glXContextRes);
+    if (!src) {
+	client->errorValue = source;
+	return __glXError(GLXBadContext);
+    }
+    dst = (__GLXcontext *) LookupIDByType(dest, __glXContextRes);
+    if (!dst) {
+	client->errorValue = dest;
+	return __glXError(GLXBadContext);
+    }
+
+    /*
+    ** They must be in the same address space, and same screen.
+    ** NOTE: no support for direct rendering contexts here.
+    */
+    if (src->isDirect || dst->isDirect ||
+	(src->pGlxScreen != dst->pGlxScreen)) {
+	client->errorValue = source;
+	return BadMatch;
+    }
+
+    /*
+    ** The destination context must not be current for any client.
+    */
+    if (dst->isCurrent) {
+	client->errorValue = dest;
+	return BadAccess;
+    }
+
+    if (tag) {
+	__GLXcontext *tagcx = __glXLookupContextByTag(cl, tag);
+	
+	if (!tagcx) {
+	    return __glXError(GLXBadContextTag);
+	}
+	if (tagcx != src) {
+	    /*
+	    ** This would be caused by a faulty implementation of the client
+	    ** library.
+	    */
+	    return BadMatch;
+	}
+	/*
+	** In this case, glXCopyContext is in both GL and X streams, in terms
+	** of sequentiality.
+	*/
+	if (__glXForceCurrent(cl, tag, &error)) {
+	    /*
+	    ** Do whatever is needed to make sure that all preceding requests
+	    ** in both streams are completed before the copy is executed.
+	    */
+	    CALL_Finish( GET_DISPATCH(), () );
+	    __GLX_NOTE_FLUSHED_CMDS(tagcx);
+	} else {
+	    return error;
+	}
+    }
+    /*
+    ** Issue copy.  The only reason for failure is a bad mask.
+    */
+    if (!(*dst->copy)(dst, src, mask)) {
+	client->errorValue = mask;
+	return BadValue;
+    }
+    return Success;
+}
+
+
+int __glXDisp_GetVisualConfigs(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetVisualConfigsReq *req = (xGLXGetVisualConfigsReq *) pc;
+    ClientPtr client = cl->client;
+    xGLXGetVisualConfigsReply reply;
+    __GLXscreen *pGlxScreen;
+    __GLXconfig *modes;
+    CARD32 buf[__GLX_TOTAL_CONFIG];
+    int p, i, err;
+    __GLX_DECLARE_SWAP_VARIABLES;
+    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+
+    reply.numVisuals = pGlxScreen->numVisuals;
+    reply.numProps = __GLX_TOTAL_CONFIG;
+    reply.length = (reply.numVisuals * __GLX_SIZE_CARD32 * __GLX_TOTAL_CONFIG) >> 2;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+	__GLX_SWAP_SHORT(&reply.sequenceNumber);
+	__GLX_SWAP_INT(&reply.length);
+	__GLX_SWAP_INT(&reply.numVisuals);
+	__GLX_SWAP_INT(&reply.numProps);
+    }
+
+    WriteToClient(client, sz_xGLXGetVisualConfigsReply, (char *)&reply);
+
+    for (i = 0; i < pGlxScreen->numVisuals; i++) {
+	modes = pGlxScreen->visuals[i];
+
+	p = 0;
+	buf[p++] = modes->visualID;
+	buf[p++] = glxConvertToXVisualType( modes->visualType );
+	buf[p++] = modes->rgbMode;
+
+	buf[p++] = modes->redBits;
+	buf[p++] = modes->greenBits;
+	buf[p++] = modes->blueBits;
+	buf[p++] = modes->alphaBits;
+	buf[p++] = modes->accumRedBits;
+	buf[p++] = modes->accumGreenBits;
+	buf[p++] = modes->accumBlueBits;
+	buf[p++] = modes->accumAlphaBits;
+
+	buf[p++] = modes->doubleBufferMode;
+	buf[p++] = modes->stereoMode;
+
+	buf[p++] = modes->rgbBits;
+	buf[p++] = modes->depthBits;
+	buf[p++] = modes->stencilBits;
+	buf[p++] = modes->numAuxBuffers;
+	buf[p++] = modes->level;
+	/* 
+	** Add token/value pairs for extensions.
+	*/
+	buf[p++] = GLX_VISUAL_CAVEAT_EXT;
+	buf[p++] = modes->visualRating;
+	buf[p++] = GLX_TRANSPARENT_TYPE;
+	buf[p++] = modes->transparentPixel;
+	buf[p++] = GLX_TRANSPARENT_RED_VALUE;
+	buf[p++] = modes->transparentRed;
+	buf[p++] = GLX_TRANSPARENT_GREEN_VALUE;
+	buf[p++] = modes->transparentGreen;
+	buf[p++] = GLX_TRANSPARENT_BLUE_VALUE;
+	buf[p++] = modes->transparentBlue;
+	buf[p++] = GLX_TRANSPARENT_ALPHA_VALUE;
+	buf[p++] = modes->transparentAlpha;
+	buf[p++] = GLX_TRANSPARENT_INDEX_VALUE;
+	buf[p++] = modes->transparentIndex;
+	buf[p++] = 0;
+	buf[p++] = 0;
+	buf[p++] = 0;
+	buf[p++] = 0;
+	buf[p++] = 0;
+	buf[p++] = 0;
+
+	if (client->swapped) {
+	    __GLX_SWAP_INT_ARRAY(buf, __GLX_TOTAL_CONFIG);
+	}
+	WriteToClient(client, __GLX_SIZE_CARD32 * __GLX_TOTAL_CONFIG, 
+		(char *)buf);
+    }
+    return Success;
+}
+
+#define __GLX_TOTAL_FBCONFIG_ATTRIBS (33)
+#define __GLX_FBCONFIG_ATTRIBS_LENGTH (__GLX_TOTAL_FBCONFIG_ATTRIBS * 2)
+/**
+ * Send the set of GLXFBConfigs to the client.  There is not currently
+ * and interface into the driver on the server-side to get GLXFBConfigs,
+ * so we "invent" some based on the \c __GLXvisualConfig structures that
+ * the driver does supply.
+ * 
+ * The reply format for both \c glXGetFBConfigs and \c glXGetFBConfigsSGIX
+ * is the same, so this routine pulls double duty.
+ */
+
+static int
+DoGetFBConfigs(__GLXclientState *cl, unsigned screen)
+{
+    ClientPtr client = cl->client;
+    xGLXGetFBConfigsReply reply;
+    __GLXscreen *pGlxScreen;
+    CARD32 buf[__GLX_FBCONFIG_ATTRIBS_LENGTH];
+    int p, err;
+    __GLXconfig *modes;
+    __GLX_DECLARE_SWAP_VARIABLES;
+    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
+
+    if (!validGlxScreen(cl->client, screen, &pGlxScreen, &err))
+	return err;
+
+    reply.numFBConfigs = pGlxScreen->numFBConfigs;
+    reply.numAttribs = __GLX_TOTAL_FBCONFIG_ATTRIBS;
+    reply.length = (__GLX_FBCONFIG_ATTRIBS_LENGTH * reply.numFBConfigs);
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+	__GLX_SWAP_SHORT(&reply.sequenceNumber);
+	__GLX_SWAP_INT(&reply.length);
+	__GLX_SWAP_INT(&reply.numFBConfigs);
+	__GLX_SWAP_INT(&reply.numAttribs);
+    }
+
+    WriteToClient(client, sz_xGLXGetFBConfigsReply, (char *)&reply);
+
+    for (modes = pGlxScreen->fbconfigs; modes != NULL; modes = modes->next) {
+	p = 0;
+
+#define WRITE_PAIR(tag,value) \
+    do { buf[p++] = tag ; buf[p++] = value ; } while( 0 )
+
+	WRITE_PAIR( GLX_VISUAL_ID,        modes->visualID );
+	WRITE_PAIR( GLX_FBCONFIG_ID,      modes->fbconfigID );
+	WRITE_PAIR( GLX_X_RENDERABLE,     GL_TRUE );
+
+	WRITE_PAIR( GLX_RGBA,             modes->rgbMode );
+	WRITE_PAIR( GLX_DOUBLEBUFFER,     modes->doubleBufferMode );
+	WRITE_PAIR( GLX_STEREO,           modes->stereoMode );
+
+	WRITE_PAIR( GLX_BUFFER_SIZE,      modes->rgbBits );
+	WRITE_PAIR( GLX_LEVEL,            modes->level );
+	WRITE_PAIR( GLX_AUX_BUFFERS,      modes->numAuxBuffers );
+	WRITE_PAIR( GLX_RED_SIZE,         modes->redBits );
+	WRITE_PAIR( GLX_GREEN_SIZE,       modes->greenBits );
+	WRITE_PAIR( GLX_BLUE_SIZE,        modes->blueBits );
+	WRITE_PAIR( GLX_ALPHA_SIZE,       modes->alphaBits );
+	WRITE_PAIR( GLX_ACCUM_RED_SIZE,   modes->accumRedBits );
+	WRITE_PAIR( GLX_ACCUM_GREEN_SIZE, modes->accumGreenBits );
+	WRITE_PAIR( GLX_ACCUM_BLUE_SIZE,  modes->accumBlueBits );
+	WRITE_PAIR( GLX_ACCUM_ALPHA_SIZE, modes->accumAlphaBits );
+	WRITE_PAIR( GLX_DEPTH_SIZE,       modes->depthBits );
+	WRITE_PAIR( GLX_STENCIL_SIZE,     modes->stencilBits );
+	WRITE_PAIR( GLX_X_VISUAL_TYPE,    modes->visualType );
+	WRITE_PAIR( GLX_CONFIG_CAVEAT, modes->visualRating );
+	WRITE_PAIR( GLX_TRANSPARENT_TYPE, modes->transparentPixel );
+	WRITE_PAIR( GLX_TRANSPARENT_RED_VALUE, modes->transparentRed );
+	WRITE_PAIR( GLX_TRANSPARENT_GREEN_VALUE, modes->transparentGreen );
+	WRITE_PAIR( GLX_TRANSPARENT_BLUE_VALUE, modes->transparentBlue );
+	WRITE_PAIR( GLX_TRANSPARENT_ALPHA_VALUE, modes->transparentAlpha );
+	WRITE_PAIR( GLX_TRANSPARENT_INDEX_VALUE, modes->transparentIndex );
+	WRITE_PAIR( GLX_SWAP_METHOD_OML, modes->swapMethod );
+	WRITE_PAIR( GLX_DRAWABLE_TYPE, modes->drawableType );
+	WRITE_PAIR( GLX_BIND_TO_TEXTURE_RGB_EXT, modes->bindToTextureRgb );
+	WRITE_PAIR( GLX_BIND_TO_TEXTURE_RGBA_EXT, modes->bindToTextureRgba );
+	WRITE_PAIR( GLX_BIND_TO_MIPMAP_TEXTURE_EXT, modes->bindToMipmapTexture );
+	WRITE_PAIR( GLX_BIND_TO_TEXTURE_TARGETS_EXT, modes->bindToTextureTargets );
+
+	if (client->swapped) {
+	    __GLX_SWAP_INT_ARRAY(buf, __GLX_FBCONFIG_ATTRIBS_LENGTH);
+	}
+	WriteToClient(client, __GLX_SIZE_CARD32 * __GLX_FBCONFIG_ATTRIBS_LENGTH,
+		      (char *)buf);
+    }
+    return Success;
+}
+
+
+int __glXDisp_GetFBConfigs(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetFBConfigsReq *req = (xGLXGetFBConfigsReq *) pc;
+    return DoGetFBConfigs(cl, req->screen);
+}
+
+int __glXDisp_GetFBConfigsSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetFBConfigsSGIXReq *req = (xGLXGetFBConfigsSGIXReq *) pc;
+    return DoGetFBConfigs(cl, req->screen);
+}
+
+static int 
+DoCreateGLXDrawable(ClientPtr client, __GLXscreen *pGlxScreen, __GLXconfig *config,
+		    DrawablePtr pDraw, XID glxDrawableId, int type)
+{
+    __GLXdrawable *pGlxDraw;
+
+    LEGAL_NEW_RESOURCE(glxDrawableId, client);
+
+    if (pGlxScreen->pScreen != pDraw->pScreen)
+	return BadMatch;
+
+    pGlxDraw = pGlxScreen->createDrawable(pGlxScreen, pDraw, type,
+					  glxDrawableId, config);
+    if (pGlxDraw == NULL)
+	return BadAlloc;
+
+    if (!AddResource(glxDrawableId, __glXDrawableRes, pGlxDraw)) {
+	pGlxDraw->destroy (pGlxDraw);
+	return BadAlloc;
+    }
+
+    return Success;
+}
+
+static int
+DoCreateGLXPixmap(ClientPtr client, __GLXscreen *pGlxScreen, __GLXconfig *config,
+		  XID drawableId, XID glxDrawableId)
+{
+    DrawablePtr pDraw;
+    int err;
+
+    err = dixLookupDrawable(&pDraw, drawableId, client, 0, DixAddAccess);
+    if (err != Success || pDraw->type != DRAWABLE_PIXMAP) {
+	client->errorValue = drawableId;
+	return BadPixmap;
+    }
+
+    err = DoCreateGLXDrawable(client, pGlxScreen, config, pDraw,
+			      glxDrawableId, GLX_DRAWABLE_PIXMAP);
+
+    if (err == Success)
+	((PixmapPtr) pDraw)->refcnt++;
+
+    return err;
+}
+
+static void
+determineTextureTarget(XID glxDrawableID, CARD32 *attribs, CARD32 numAttribs)
+{
+    GLenum target = 0;
+    int i;
+    __GLXdrawable *pGlxDraw;
+
+    pGlxDraw = LookupIDByType(glxDrawableID, __glXDrawableRes);
+
+    for (i = 0; i < numAttribs; i++) {
+	if (attribs[2 * i] == GLX_TEXTURE_TARGET_EXT) {
+	    switch (attribs[2 * i + 1]) {
+	    case GLX_TEXTURE_2D_EXT:
+		target = GL_TEXTURE_2D;
+		break;
+	    case GLX_TEXTURE_RECTANGLE_EXT:
+		target = GL_TEXTURE_RECTANGLE_ARB;
+		break;
+	    }
+	}
+    }
+ 
+    if (!target) {
+	int w = pGlxDraw->pDraw->width, h = pGlxDraw->pDraw->height;
+	
+	if (h & (h - 1) || w & (w - 1))
+	    target = GL_TEXTURE_RECTANGLE_ARB;
+	else
+	    target = GL_TEXTURE_2D;
+    }
+
+    pGlxDraw->target = target;
+}
+
+int __glXDisp_CreateGLXPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateGLXPixmapReq *req = (xGLXCreateGLXPixmapReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxVisual(cl->client, pGlxScreen, req->visual, &config, &err))
+	return err;
+
+    return DoCreateGLXPixmap(cl->client, pGlxScreen, config,
+			     req->pixmap, req->glxpixmap);
+}
+
+int __glXDisp_CreatePixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreatePixmapReq *req = (xGLXCreatePixmapReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(cl->client, pGlxScreen, req->fbconfig, &config, &err))
+	return err;
+
+    err = DoCreateGLXPixmap(cl->client, pGlxScreen, config,
+			    req->pixmap, req->glxpixmap);
+    if (err != Success)
+	return err;
+
+    determineTextureTarget(req->glxpixmap,
+			   (CARD32*) (req + 1), req->numAttribs);
+
+    return Success;
+}
+
+int __glXDisp_CreateGLXPixmapWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateGLXPixmapWithConfigSGIXReq *req = 
+	(xGLXCreateGLXPixmapWithConfigSGIXReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(cl->client, pGlxScreen, req->fbconfig, &config, &err))
+	return err;
+
+    return DoCreateGLXPixmap(cl->client, pGlxScreen,
+			     config, req->pixmap, req->glxpixmap);
+}
+
+
+static int DoDestroyDrawable(__GLXclientState *cl, XID glxdrawable, int type)
+{
+    ClientPtr client = cl->client;
+    __GLXdrawable *pGlxDraw;
+
+    /*
+    ** Check it's the right type of drawable.
+    */
+    pGlxDraw = LookupIDByType(glxdrawable, __glXDrawableRes);
+    if (pGlxDraw == NULL || pGlxDraw->type != type) {
+	client->errorValue = glxdrawable;
+	switch (type) {
+	case GLX_DRAWABLE_WINDOW:
+	    return __glXError(GLXBadWindow);
+	case GLX_DRAWABLE_PIXMAP:
+	    return __glXError(GLXBadDrawable);
+	case GLX_DRAWABLE_PBUFFER:
+	    return __glXError(GLXBadPbuffer);
+	}
+    }
+
+    if (type == GLX_DRAWABLE_PIXMAP) {
+	((PixmapPtr) pGlxDraw->pDraw)->refcnt--;
+    }
+
+    FreeResource(glxdrawable, FALSE);
+
+    return Success;
+}
+
+int __glXDisp_DestroyGLXPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXDestroyGLXPixmapReq *req = (xGLXDestroyGLXPixmapReq *) pc;
+
+    return DoDestroyDrawable(cl, req->glxpixmap, GLX_DRAWABLE_PIXMAP);
+}
+
+int __glXDisp_DestroyPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXDestroyPixmapReq *req = (xGLXDestroyPixmapReq *) pc;
+
+    return DoDestroyDrawable(cl, req->glxpixmap, GLX_DRAWABLE_PIXMAP);
+}
+
+static int
+DoCreatePbuffer(ClientPtr client, int screenNum, XID fbconfigId,
+		int width, int height, XID glxDrawableId)
+{
+    __GLXconfig	*config;
+    __GLXscreen		*pGlxScreen;
+    PixmapPtr		 pPixmap;
+    int			 err;
+
+    if (!validGlxScreen(client, screenNum, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(client, pGlxScreen, fbconfigId, &config, &err))
+	return err;
+
+    __glXenterServer(GL_FALSE);
+    pPixmap = (*pGlxScreen->pScreen->CreatePixmap) (pGlxScreen->pScreen,
+						    width, height, config->rgbBits, 0);
+    __glXleaveServer(GL_FALSE);
+
+    return DoCreateGLXDrawable(client, pGlxScreen, config, &pPixmap->drawable,
+			       glxDrawableId, GLX_DRAWABLE_PBUFFER);
+}
+
+int __glXDisp_CreatePbuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreatePbufferReq	*req = (xGLXCreatePbufferReq *) pc;
+    CARD32			*attrs;
+    int				 width, height, i;
+
+    attrs = (CARD32 *) (req + 1);
+    width = 0;
+    height = 0;
+
+    for (i = 0; i < req->numAttribs; i++) {
+	switch (attrs[i * 2]) {
+	case GLX_PBUFFER_WIDTH:
+	    width = attrs[i * 2 + 1];
+	    break;
+	case GLX_PBUFFER_HEIGHT:
+	    height = attrs[i * 2 + 1];
+	    break;
+	case GLX_LARGEST_PBUFFER:
+	case GLX_PRESERVED_CONTENTS:
+	    /* FIXME: huh... */
+	    break;
+	}
+    }
+
+    return DoCreatePbuffer(cl->client, req->screen, req->fbconfig,
+			   width, height, req->pbuffer);
+}
+
+int __glXDisp_CreateGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateGLXPbufferSGIXReq *req = (xGLXCreateGLXPbufferSGIXReq *) pc;
+
+    return DoCreatePbuffer(cl->client, req->screen, req->fbconfig,
+			   req->width, req->height, req->pbuffer);
+}
+
+int __glXDisp_DestroyPbuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXDestroyPbufferReq *req = (xGLXDestroyPbufferReq *) pc;
+
+    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);
+}
+
+int __glXDisp_DestroyGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXDestroyGLXPbufferSGIXReq *req = (xGLXDestroyGLXPbufferSGIXReq *) pc;
+
+    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);
+}
+
+static int
+DoChangeDrawableAttributes(ClientPtr client, XID glxdrawable,
+			   int numAttribs, CARD32 *attribs)
+{
+    __GLXdrawable *pGlxDraw;
+    int i;
+
+    pGlxDraw = LookupIDByType(glxdrawable, __glXDrawableRes);
+    for (i = 0; i < numAttribs; i++) {
+	switch(attribs[i * 2]) {
+	case GLX_EVENT_MASK:
+	    /* All we do is to record the event mask so we can send it
+	     * back when queried.  We never actually clobber the
+	     * pbuffers, so we never need to send out the event. */
+	    pGlxDraw->eventMask = attribs[i * 2 + 1];
+	    break;
+	}
+    }
+
+    return Success;
+}
+
+int __glXDisp_ChangeDrawableAttributes(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXChangeDrawableAttributesReq *req =
+	(xGLXChangeDrawableAttributesReq *) pc;
+
+    return DoChangeDrawableAttributes(cl->client, req->drawable,
+				      req->numAttribs, (CARD32 *) (req + 1));
+}
+
+int __glXDisp_ChangeDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXChangeDrawableAttributesSGIXReq *req =
+	(xGLXChangeDrawableAttributesSGIXReq *)pc;
+
+    return DoChangeDrawableAttributes(cl->client, req->drawable,
+				      req->numAttribs, (CARD32 *) (req + 1));
+}
+
+int __glXDisp_CreateWindow(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXCreateWindowReq	*req = (xGLXCreateWindowReq *) pc;
+    __GLXconfig	*config;
+    __GLXscreen		*pGlxScreen;
+    ClientPtr		 client = cl->client;
+    DrawablePtr		 pDraw;
+    int			 err;
+
+    if (!validGlxScreen(client, req->screen, &pGlxScreen, &err))
+	return err;
+    if (!validGlxFBConfig(client, pGlxScreen, req->fbconfig, &config, &err))
+	return err;
+
+    err = dixLookupDrawable(&pDraw, req->window, client, 0, DixAddAccess);
+    if (err != Success || pDraw->type != DRAWABLE_WINDOW) {
+	client->errorValue = req->window;
+	return BadWindow;
+    }
+
+    if (!validGlxFBConfigForWindow(client, config, pDraw, &err))
+	return err;
+
+    return DoCreateGLXDrawable(client, pGlxScreen, config,
+			       pDraw, req->glxwindow, GLX_DRAWABLE_WINDOW);
+}
+
+int __glXDisp_DestroyWindow(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXDestroyWindowReq *req = (xGLXDestroyWindowReq *) pc;
+
+    return DoDestroyDrawable(cl, req->glxwindow, GLX_DRAWABLE_WINDOW);
+}
+
+
+/*****************************************************************************/
+
+/*
+** NOTE: There is no portable implementation for swap buffers as of
+** this time that is of value.  Consequently, this code must be
+** implemented by somebody other than SGI.
+*/
+int __glXDisp_SwapBuffers(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXSwapBuffersReq *req = (xGLXSwapBuffersReq *) pc;
+    GLXContextTag tag = req->contextTag;
+    XID drawId = req->drawable;
+    __GLXcontext *glxc = NULL;
+    __GLXdrawable *pGlxDraw;
+    int error;
+
+    if (tag) {
+	glxc = __glXLookupContextByTag(cl, tag);
+	if (!glxc) {
+	    return __glXError(GLXBadContextTag);
+	}
+	/*
+	** The calling thread is swapping its current drawable.  In this case,
+	** glxSwapBuffers is in both GL and X streams, in terms of
+	** sequentiality.
+	*/
+	if (__glXForceCurrent(cl, tag, &error)) {
+	    /*
+	    ** Do whatever is needed to make sure that all preceding requests
+	    ** in both streams are completed before the swap is executed.
+	    */
+	    CALL_Finish( GET_DISPATCH(), () );
+	    __GLX_NOTE_FLUSHED_CMDS(glxc);
+	} else {
+	    return error;
+	}
+    }
+
+    pGlxDraw = __glXGetDrawable(glxc, drawId, client, &error);
+    if (pGlxDraw == NULL)
+	return error;
+
+    if (pGlxDraw->type == DRAWABLE_WINDOW &&
+	(*pGlxDraw->swapBuffers)(pGlxDraw) == GL_FALSE)
+	return __glXError(GLXBadDrawable);
+
+    return Success;
+}
+
+
+static int
+DoQueryContext(__GLXclientState *cl, GLXContextID gcId)
+{
+    ClientPtr client = cl->client;
+    __GLXcontext *ctx;
+    xGLXQueryContextInfoEXTReply reply;
+    int nProps;
+    int *sendBuf, *pSendBuf;
+    int nReplyBytes;
+
+    ctx = (__GLXcontext *) LookupIDByType(gcId, __glXContextRes);
+    if (!ctx) {
+	client->errorValue = gcId;
+	return __glXError(GLXBadContext);
+    }
+
+    nProps = 3;
+    reply.length = nProps << 1;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.n = nProps;
+
+    nReplyBytes = reply.length << 2;
+    sendBuf = (int *)xalloc((size_t)nReplyBytes);
+    if (sendBuf == NULL) {
+	return __glXError(GLXBadContext);	/* XXX: Is this correct? */
+    }
+    pSendBuf = sendBuf;
+    *pSendBuf++ = GLX_SHARE_CONTEXT_EXT;
+    *pSendBuf++ = (int)(ctx->share_id);
+    *pSendBuf++ = GLX_VISUAL_ID_EXT;
+    *pSendBuf++ = (int)(ctx->config->visualID);
+    *pSendBuf++ = GLX_SCREEN_EXT;
+    *pSendBuf++ = (int)(ctx->pGlxScreen->pScreen->myNum);
+
+    if (client->swapped) {
+	__glXSwapQueryContextInfoEXTReply(client, &reply, sendBuf);
+    } else {
+	WriteToClient(client, sz_xGLXQueryContextInfoEXTReply, (char *)&reply);
+	WriteToClient(client, nReplyBytes, (char *)sendBuf);
+    }
+    xfree((char *)sendBuf);
+
+    return Success;
+}
+
+int __glXDisp_QueryContextInfoEXT(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXQueryContextInfoEXTReq *req = (xGLXQueryContextInfoEXTReq *) pc;
+
+    return DoQueryContext(cl, req->context);
+}
+
+int __glXDisp_QueryContext(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXQueryContextReq *req = (xGLXQueryContextReq *) pc;
+
+    return DoQueryContext(cl, req->context);
+}
+
+int __glXDisp_BindTexImageEXT(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    ClientPtr		 client = cl->client;
+    __GLXcontext	*context;
+    __GLXdrawable	*pGlxDraw;
+    GLXDrawable		 drawId;
+    int			 buffer;
+    int			 error;
+
+    pc += __GLX_VENDPRIV_HDR_SIZE;
+
+    drawId = *((CARD32 *) (pc));
+    buffer = *((INT32 *)  (pc + 4));
+
+    if (buffer != GLX_FRONT_LEFT_EXT)
+	return __glXError(GLXBadPixmap);
+
+    context = __glXForceCurrent (cl, req->contextTag, &error);
+    if (!context)
+	return error;
+
+    pGlxDraw = __glXGetDrawable(NULL, drawId, client, &error);
+    if (!pGlxDraw || pGlxDraw->type != GLX_DRAWABLE_PIXMAP) {
+	client->errorValue = drawId;
+	return __glXError(GLXBadPixmap);
+    }
+
+    if (!context->textureFromPixmap)
+	return __glXError(GLXUnsupportedPrivateRequest);
+
+    return context->textureFromPixmap->bindTexImage(context,
+						    buffer,
+						    pGlxDraw);
+}
+
+int __glXDisp_ReleaseTexImageEXT(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    ClientPtr		 client = cl->client;
+    __GLXdrawable	*pGlxDraw;
+    __GLXcontext	*context;
+    GLXDrawable		 drawId;
+    int			 buffer;
+    int			 error;
+
+    pc += __GLX_VENDPRIV_HDR_SIZE;
+
+    drawId = *((CARD32 *) (pc));
+    buffer = *((INT32 *)  (pc + 4));
+    
+    context = __glXForceCurrent (cl, req->contextTag, &error);
+    if (!context)
+	return error;
+
+    pGlxDraw = __glXGetDrawable(NULL, drawId, client, &error);
+    if (!pGlxDraw || pGlxDraw->type != GLX_DRAWABLE_PIXMAP) {
+	client->errorValue = drawId;
+	return error;
+    }
+
+    if (!context->textureFromPixmap)
+	return __glXError(GLXUnsupportedPrivateRequest);
+
+    return context->textureFromPixmap->releaseTexImage(context,
+						       buffer,
+						       pGlxDraw);
+}
+
+int __glXDisp_CopySubBufferMESA(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    GLXContextTag         tag = req->contextTag;
+    __GLXcontext         *glxc = NULL;
+    __GLXdrawable        *pGlxDraw;
+    ClientPtr		  client = cl->client;
+    GLXDrawable		  drawId;
+    int                   error;
+    int                   x, y, width, height;
+
+    (void) client;
+    (void) req;
+
+    pc += __GLX_VENDPRIV_HDR_SIZE;
+
+    drawId = *((CARD32 *) (pc));
+    x      = *((INT32 *)  (pc + 4));
+    y      = *((INT32 *)  (pc + 8));
+    width  = *((INT32 *)  (pc + 12));
+    height = *((INT32 *)  (pc + 16));
+
+    if (tag) {
+	glxc = __glXLookupContextByTag(cl, tag);
+	if (!glxc) {
+	    return __glXError(GLXBadContextTag);
+	}
+	/*
+	** The calling thread is swapping its current drawable.  In this case,
+	** glxSwapBuffers is in both GL and X streams, in terms of
+	** sequentiality.
+	*/
+	if (__glXForceCurrent(cl, tag, &error)) {
+	    /*
+	    ** Do whatever is needed to make sure that all preceding requests
+	    ** in both streams are completed before the swap is executed.
+	    */
+	    CALL_Finish( GET_DISPATCH(), () );
+	    __GLX_NOTE_FLUSHED_CMDS(glxc);
+	} else {
+	    return error;
+	}
+    }
+
+    pGlxDraw = __glXGetDrawable(glxc, drawId, client, &error);
+    if (!pGlxDraw)
+	return error;
+
+    if (pGlxDraw == NULL ||
+	pGlxDraw->type != GLX_DRAWABLE_WINDOW ||
+	pGlxDraw->copySubBuffer == NULL)
+	return __glXError(GLXBadDrawable);
+
+    (*pGlxDraw->copySubBuffer)(pGlxDraw, x, y, width, height);
+
+    return Success;
+}
+
+/*
+** Get drawable attributes
+*/
+static int
+DoGetDrawableAttributes(__GLXclientState *cl, XID drawId)
+{
+    ClientPtr client = cl->client;
+    xGLXGetDrawableAttributesReply reply;
+    __GLXdrawable *pGlxDraw;
+    CARD32 attributes[6];
+    int numAttribs, error;
+
+    pGlxDraw = __glXGetDrawable(NULL, drawId, client, &error);
+    if (!pGlxDraw) {
+	client->errorValue = drawId;
+	return error;
+    }
+
+    numAttribs = 3;
+    reply.length = numAttribs << 1;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.numAttribs = numAttribs;
+
+    attributes[0] = GLX_TEXTURE_TARGET_EXT;
+    attributes[1] = pGlxDraw->target == GL_TEXTURE_2D ? GLX_TEXTURE_2D_EXT :
+	GLX_TEXTURE_RECTANGLE_EXT;
+    attributes[2] = GLX_Y_INVERTED_EXT;
+    attributes[3] = GL_FALSE;
+    attributes[4] = GLX_EVENT_MASK;
+    attributes[5] = pGlxDraw->eventMask;
+
+    if (client->swapped) {
+	__glXSwapGetDrawableAttributesReply(client, &reply, attributes);
+    } else {
+	WriteToClient(client, sz_xGLXGetDrawableAttributesReply,
+		      (char *)&reply);
+	WriteToClient(client, reply.length * sizeof (CARD32),
+		      (char *)attributes);
+    }
+
+    return Success;
+}
+
+int __glXDisp_GetDrawableAttributes(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetDrawableAttributesReq *req = (xGLXGetDrawableAttributesReq *)pc;
+
+    return DoGetDrawableAttributes(cl, req->drawable);
+}
+
+int __glXDisp_GetDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetDrawableAttributesSGIXReq *req =
+	(xGLXGetDrawableAttributesSGIXReq *)pc;
+    
+    return DoGetDrawableAttributes(cl, req->drawable);
+}
+
+/************************************************************************/
+
+/*
+** Render and Renderlarge are not in the GLX API.  They are used by the GLX
+** client library to send batches of GL rendering commands.
+*/
+
+/*
+** Execute all the drawing commands in a request.
+*/
+int __glXDisp_Render(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXRenderReq *req;
+    ClientPtr client= cl->client;
+    int left, cmdlen, error;
+    int commandsDone;
+    CARD16 opcode;
+    __GLXrenderHeader *hdr;
+    __GLXcontext *glxc;
+    __GLX_DECLARE_SWAP_VARIABLES;
+
+    req = (xGLXRenderReq *) pc;
+    if (client->swapped) {
+	__GLX_SWAP_SHORT(&req->length);
+	__GLX_SWAP_INT(&req->contextTag);
+    }
+
+    glxc = __glXForceCurrent(cl, req->contextTag, &error);
+    if (!glxc) {
+	return error;
+    }
+
+    commandsDone = 0;
+    pc += sz_xGLXRenderReq;
+    left = (req->length << 2) - sz_xGLXRenderReq;
+    while (left > 0) {
+        __GLXrenderSizeData entry;
+        int extra;
+	__GLXdispatchRenderProcPtr proc;
+	int err;
+
+	/*
+	** Verify that the header length and the overall length agree.
+	** Also, each command must be word aligned.
+	*/
+	hdr = (__GLXrenderHeader *) pc;
+	if (client->swapped) {
+	    __GLX_SWAP_SHORT(&hdr->length);
+	    __GLX_SWAP_SHORT(&hdr->opcode);
+	}
+	cmdlen = hdr->length;
+	opcode = hdr->opcode;
+
+	/*
+	** Check for core opcodes and grab entry data.
+	*/
+	err = __glXGetProtocolSizeData(& Render_dispatch_info, opcode, & entry);
+	proc = (__GLXdispatchRenderProcPtr)
+	    __glXGetProtocolDecodeFunction(& Render_dispatch_info,
+					   opcode, client->swapped);
+
+	if ((err < 0) || (proc == NULL)) {
+	    client->errorValue = commandsDone;
+	    return __glXError(GLXBadRenderRequest);
+	}
+
+        if (entry.varsize) {
+            /* variable size command */
+            extra = (*entry.varsize)(pc + __GLX_RENDER_HDR_SIZE,
+				     client->swapped);
+            if (extra < 0) {
+                extra = 0;
+            }
+            if (cmdlen != __GLX_PAD(entry.bytes + extra)) {
+                return BadLength;
+            }
+        } else {
+            /* constant size command */
+            if (cmdlen != __GLX_PAD(entry.bytes)) {
+                return BadLength;
+            }
+        }
+	if (left < cmdlen) {
+	    return BadLength;
+	}
+
+	/*
+	** Skip over the header and execute the command.  We allow the
+	** caller to trash the command memory.  This is useful especially
+	** for things that require double alignment - they can just shift
+	** the data towards lower memory (trashing the header) by 4 bytes
+	** and achieve the required alignment.
+	*/
+	(*proc)(pc + __GLX_RENDER_HDR_SIZE);
+	pc += cmdlen;
+	left -= cmdlen;
+	commandsDone++;
+    }
+    __GLX_NOTE_UNFLUSHED_CMDS(glxc);
+    return Success;
+}
+
+
+/*
+** Execute a large rendering request (one that spans multiple X requests).
+*/
+int __glXDisp_RenderLarge(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXRenderLargeReq *req;
+    ClientPtr client= cl->client;
+    size_t dataBytes;
+    __GLXrenderLargeHeader *hdr;
+    __GLXcontext *glxc;
+    int error;
+    CARD16 opcode;
+    __GLX_DECLARE_SWAP_VARIABLES;
+    
+    req = (xGLXRenderLargeReq *) pc;
+    if (client->swapped) {
+	__GLX_SWAP_SHORT(&req->length);
+	__GLX_SWAP_INT(&req->contextTag);
+	__GLX_SWAP_INT(&req->dataBytes);
+	__GLX_SWAP_SHORT(&req->requestNumber);
+	__GLX_SWAP_SHORT(&req->requestTotal);
+    }
+
+    glxc = __glXForceCurrent(cl, req->contextTag, &error);
+    if (!glxc) {
+	/* Reset in case this isn't 1st request. */
+	__glXResetLargeCommandStatus(cl);
+	return error;
+    }
+    dataBytes = req->dataBytes;
+
+    /*
+    ** Check the request length.
+    */
+    if ((req->length << 2) != __GLX_PAD(dataBytes) + sz_xGLXRenderLargeReq) {
+	client->errorValue = req->length;
+	/* Reset in case this isn't 1st request. */
+	__glXResetLargeCommandStatus(cl);
+	return BadLength;
+    }
+    pc += sz_xGLXRenderLargeReq;
+    
+    if (cl->largeCmdRequestsSoFar == 0) {
+	__GLXrenderSizeData entry;
+	int extra;
+	size_t cmdlen;
+	int err;
+
+	/*
+	** This is the first request of a multi request command.
+	** Make enough space in the buffer, then copy the entire request.
+	*/
+	if (req->requestNumber != 1) {
+	    client->errorValue = req->requestNumber;
+	    return __glXError(GLXBadLargeRequest);
+	}
+
+	hdr = (__GLXrenderLargeHeader *) pc;
+	if (client->swapped) {
+	    __GLX_SWAP_INT(&hdr->length);
+	    __GLX_SWAP_INT(&hdr->opcode);
+	}
+	cmdlen = hdr->length;
+	opcode = hdr->opcode;
+
+	/*
+	** Check for core opcodes and grab entry data.
+	*/
+	err = __glXGetProtocolSizeData(& Render_dispatch_info, opcode, & entry);
+	if (err < 0) {
+	    client->errorValue = opcode;
+	    return __glXError(GLXBadLargeRequest);
+	}
+
+	if (entry.varsize) {
+	    /*
+	    ** If it's a variable-size command (a command whose length must
+	    ** be computed from its parameters), all the parameters needed
+	    ** will be in the 1st request, so it's okay to do this.
+	    */
+	    extra = (*entry.varsize)(pc + __GLX_RENDER_LARGE_HDR_SIZE,
+				     client->swapped);
+	    if (extra < 0) {
+		extra = 0;
+	    }
+	    /* large command's header is 4 bytes longer, so add 4 */
+	    if (cmdlen != __GLX_PAD(entry.bytes + 4 + extra)) {
+		return BadLength;
+	    }
+	} else {
+	    /* constant size command */
+	    if (cmdlen != __GLX_PAD(entry.bytes + 4)) {
+		return BadLength;
+	    }
+	}
+	/*
+	** Make enough space in the buffer, then copy the entire request.
+	*/
+	if (cl->largeCmdBufSize < cmdlen) {
+	    if (!cl->largeCmdBuf) {
+		cl->largeCmdBuf = (GLbyte *) xalloc(cmdlen);
+	    } else {
+		cl->largeCmdBuf = (GLbyte *) xrealloc(cl->largeCmdBuf, cmdlen);
+	    }
+	    if (!cl->largeCmdBuf) {
+		return BadAlloc;
+	    }
+	    cl->largeCmdBufSize = cmdlen;
+	}
+	memcpy(cl->largeCmdBuf, pc, dataBytes);
+
+	cl->largeCmdBytesSoFar = dataBytes;
+	cl->largeCmdBytesTotal = cmdlen;
+	cl->largeCmdRequestsSoFar = 1;
+	cl->largeCmdRequestsTotal = req->requestTotal;
+	return Success;
+	
+    } else {
+	/*
+	** We are receiving subsequent (i.e. not the first) requests of a
+	** multi request command.
+	*/
+
+	/*
+	** Check the request number and the total request count.
+	*/
+	if (req->requestNumber != cl->largeCmdRequestsSoFar + 1) {
+	    client->errorValue = req->requestNumber;
+	    __glXResetLargeCommandStatus(cl);
+	    return __glXError(GLXBadLargeRequest);
+	}
+	if (req->requestTotal != cl->largeCmdRequestsTotal) {
+	    client->errorValue = req->requestTotal;
+	    __glXResetLargeCommandStatus(cl);
+	    return __glXError(GLXBadLargeRequest);
+	}
+
+	/*
+	** Check that we didn't get too much data.
+	*/
+	if ((cl->largeCmdBytesSoFar + dataBytes) > cl->largeCmdBytesTotal) {
+	    client->errorValue = dataBytes;
+	    __glXResetLargeCommandStatus(cl);
+	    return __glXError(GLXBadLargeRequest);
+	}
+	memcpy(cl->largeCmdBuf + cl->largeCmdBytesSoFar, pc, dataBytes);
+	cl->largeCmdBytesSoFar += dataBytes;
+	cl->largeCmdRequestsSoFar++;
+
+	if (req->requestNumber == cl->largeCmdRequestsTotal) {
+	    __GLXdispatchRenderProcPtr proc;
+
+	    /*
+	    ** This is the last request; it must have enough bytes to complete
+	    ** the command.
+	    */
+	    /* NOTE: the two pad macros have been added below; they are needed
+	    ** because the client library pads the total byte count, but not
+	    ** the per-request byte counts.  The Protocol Encoding says the
+	    ** total byte count should not be padded, so a proposal will be 
+	    ** made to the ARB to relax the padding constraint on the total 
+	    ** byte count, thus preserving backward compatibility.  Meanwhile, 
+	    ** the padding done below fixes a bug that did not allow
+	    ** large commands of odd sizes to be accepted by the server.
+	    */
+	    if (__GLX_PAD(cl->largeCmdBytesSoFar) !=
+		__GLX_PAD(cl->largeCmdBytesTotal)) {
+		client->errorValue = dataBytes;
+		__glXResetLargeCommandStatus(cl);
+		return __glXError(GLXBadLargeRequest);
+	    }
+	    hdr = (__GLXrenderLargeHeader *) cl->largeCmdBuf;
+	    /*
+	    ** The opcode and length field in the header had already been
+	    ** swapped when the first request was received.
+	    **
+	    ** Use the opcode to index into the procedure table.
+	    */
+	    opcode = hdr->opcode;
+
+	    proc = (__GLXdispatchRenderProcPtr)
+	      __glXGetProtocolDecodeFunction(& Render_dispatch_info, opcode,
+					     client->swapped);
+	    if (proc == NULL) {
+		client->errorValue = opcode;
+		return __glXError(GLXBadLargeRequest);
+	    }
+
+	    /*
+	    ** Skip over the header and execute the command.
+	    */
+	    (*proc)(cl->largeCmdBuf + __GLX_RENDER_LARGE_HDR_SIZE);
+	    __GLX_NOTE_UNFLUSHED_CMDS(glxc);
+
+	    /*
+	    ** Reset for the next RenderLarge series.
+	    */
+	    __glXResetLargeCommandStatus(cl);
+	} else {
+	    /*
+	    ** This is neither the first nor the last request.
+	    */
+	}
+	return Success;
+    }
+}
+
+extern RESTYPE __glXSwapBarrierRes;
+
+int __glXDisp_BindSwapBarrierSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXBindSwapBarrierSGIXReq *req = (xGLXBindSwapBarrierSGIXReq *) pc;
+    XID drawable = req->drawable;
+    int barrier = req->barrier;
+    DrawablePtr pDraw;
+    int screen, rc;
+    __GLXscreen *pGlxScreen;
+
+    rc = dixLookupDrawable(&pDraw, drawable, client, 0, DixGetAttrAccess);
+    pGlxScreen = glxGetScreen(pDraw->pScreen);
+    if (rc == Success && (pDraw->type == DRAWABLE_WINDOW)) {
+	screen = pDraw->pScreen->myNum;
+        if (pGlxScreen->swapBarrierFuncs) {
+            int ret = pGlxScreen->swapBarrierFuncs->bindSwapBarrierFunc(screen, drawable, barrier);
+            if (ret == Success) {
+                if (barrier)
+                    /* add source for cleanup when drawable is gone */
+                    AddResource(drawable, __glXSwapBarrierRes, (pointer)screen);
+                else
+                    /* delete source */
+                    FreeResourceByType(drawable, __glXSwapBarrierRes, FALSE);
+            }
+            return ret;
+        }
+    }
+    client->errorValue = drawable;
+    return __glXError(GLXBadDrawable);
+}
+
+
+int __glXDisp_QueryMaxSwapBarriersSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryMaxSwapBarriersSGIXReq *req =
+                                    (xGLXQueryMaxSwapBarriersSGIXReq *) pc;
+    xGLXQueryMaxSwapBarriersSGIXReply reply;
+    int screen = req->screen;
+    __GLXscreen *pGlxScreen;
+
+    pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+    if (pGlxScreen->swapBarrierFuncs)
+        reply.max = pGlxScreen->swapBarrierFuncs->queryMaxSwapBarriersFunc(screen);
+    else
+        reply.max = 0;
+
+
+    reply.length = 0;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+
+    if (client->swapped) {
+        __GLX_DECLARE_SWAP_VARIABLES;
+        __GLX_SWAP_SHORT(&reply.sequenceNumber);
+    }
+
+    WriteToClient(client, sz_xGLXQueryMaxSwapBarriersSGIXReply,
+                        (char *) &reply);
+    return Success;
+}
+
+#define GLX_BAD_HYPERPIPE_SGIX 92
+
+int __glXDisp_QueryHyperpipeNetworkSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryHyperpipeNetworkSGIXReq * req = (xGLXQueryHyperpipeNetworkSGIXReq *) pc;
+    xGLXQueryHyperpipeNetworkSGIXReply reply;
+    int screen = req->screen;
+    void *rdata = NULL;
+
+    int length=0;
+    int npipes=0;
+
+    int n= 0;
+    __GLXscreen *pGlxScreen;
+
+    pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+    if (pGlxScreen->hyperpipeFuncs) {
+        rdata =
+            (pGlxScreen->hyperpipeFuncs->queryHyperpipeNetworkFunc(screen, &npipes, &n));
+    }
+    length = __GLX_PAD(n) >> 2;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = length;
+    reply.n = n;
+    reply.npipes = npipes;
+
+    if (client->swapped) {
+        __GLX_DECLARE_SWAP_VARIABLES;
+        __GLX_SWAP_SHORT(&reply.sequenceNumber);
+        __GLX_SWAP_INT(&reply.length);
+        __GLX_SWAP_INT(&reply.n);
+        __GLX_SWAP_INT(&reply.npipes);
+    }
+    WriteToClient(client, sz_xGLXQueryHyperpipeNetworkSGIXReply,
+                  (char *) &reply);
+
+    WriteToClient(client, length << 2, (char *)rdata);
+
+    return Success;
+}
+
+int __glXDisp_DestroyHyperpipeConfigSGIX (__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyHyperpipeConfigSGIXReq * req =
+        (xGLXDestroyHyperpipeConfigSGIXReq *) pc;
+    xGLXDestroyHyperpipeConfigSGIXReply reply;
+    int screen = req->screen;
+    int  success = GLX_BAD_HYPERPIPE_SGIX;
+    int hpId ;
+    __GLXscreen *pGlxScreen;
+
+    hpId = req->hpId;
+
+    pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+    if (pGlxScreen->hyperpipeFuncs) {
+        success = pGlxScreen->hyperpipeFuncs->destroyHyperpipeConfigFunc(screen, hpId);
+    }
+
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = __GLX_PAD(0) >> 2;
+    reply.n = 0;
+    reply.success = success;
+
+
+    if (client->swapped) {
+        __GLX_DECLARE_SWAP_VARIABLES;
+        __GLX_SWAP_SHORT(&reply.sequenceNumber);
+    }
+    WriteToClient(client,
+                  sz_xGLXDestroyHyperpipeConfigSGIXReply,
+                  (char *) &reply);
+    return Success;
+}
+
+int __glXDisp_QueryHyperpipeConfigSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryHyperpipeConfigSGIXReq * req =
+        (xGLXQueryHyperpipeConfigSGIXReq *) pc;
+    xGLXQueryHyperpipeConfigSGIXReply reply;
+    int screen = req->screen;
+    void *rdata = NULL;
+    int length;
+    int npipes=0;
+    int n= 0;
+    int hpId;
+    __GLXscreen *pGlxScreen;
+
+    hpId = req->hpId;
+
+    pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+    if (pGlxScreen->hyperpipeFuncs) {
+        rdata = pGlxScreen->hyperpipeFuncs->queryHyperpipeConfigFunc(screen, hpId,&npipes, &n);
+    }
+
+    length = __GLX_PAD(n) >> 2;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = length;
+    reply.n = n;
+    reply.npipes = npipes;
+
+
+    if (client->swapped) {
+        __GLX_DECLARE_SWAP_VARIABLES;
+        __GLX_SWAP_SHORT(&reply.sequenceNumber);
+        __GLX_SWAP_INT(&reply.length);
+        __GLX_SWAP_INT(&reply.n);
+        __GLX_SWAP_INT(&reply.npipes);
+    }
+
+    WriteToClient(client, sz_xGLXQueryHyperpipeConfigSGIXReply,
+                  (char *) &reply);
+
+    WriteToClient(client, length << 2, (char *)rdata);
+
+    return Success;
+}
+
+int __glXDisp_HyperpipeConfigSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXHyperpipeConfigSGIXReq * req =
+        (xGLXHyperpipeConfigSGIXReq *) pc;
+    xGLXHyperpipeConfigSGIXReply reply;
+    int screen = req->screen;
+    void *rdata;
+
+    int npipes=0, networkId;
+    int hpId=-1;
+    __GLXscreen *pGlxScreen;
+
+    pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
+    networkId = (int)req->networkId;
+    npipes = (int)req->npipes;
+    rdata = (void *)(req +1);
+
+    if (pGlxScreen->hyperpipeFuncs) {
+        pGlxScreen->hyperpipeFuncs->hyperpipeConfigFunc(screen,networkId,
+                                                        &hpId, &npipes,
+                                                        (void *) rdata);
+    }
+
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = __GLX_PAD(0) >> 2;
+    reply.n = 0;
+    reply.npipes = npipes;
+    reply.hpId = hpId;
+
+    if (client->swapped) {
+        __GLX_DECLARE_SWAP_VARIABLES;
+        __GLX_SWAP_SHORT(&reply.sequenceNumber);
+        __GLX_SWAP_INT(&reply.npipes);
+        __GLX_SWAP_INT(&reply.hpId);
+    }
+
+    WriteToClient(client, sz_xGLXHyperpipeConfigSGIXReply,
+                  (char *) &reply);
+
+    return Success;
+}
+
+
+/************************************************************************/
+
+/*
+** No support is provided for the vendor-private requests other than
+** allocating the entry points in the dispatch table.
+*/
+
+int __glXDisp_VendorPrivate(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    GLint vendorcode = req->vendorCode;
+    __GLXdispatchVendorPrivProcPtr proc;
+
+
+    proc = (__GLXdispatchVendorPrivProcPtr)
+      __glXGetProtocolDecodeFunction(& VendorPriv_dispatch_info,
+				     vendorcode, 0);
+    if (proc != NULL) {
+	(*proc)(cl, (GLbyte*)req);
+	return Success;
+    }
+
+    cl->client->errorValue = req->vendorCode;
+    return __glXError(GLXUnsupportedPrivateRequest);
+}
+
+int __glXDisp_VendorPrivateWithReply(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    GLint vendorcode = req->vendorCode;
+    __GLXdispatchVendorPrivProcPtr proc;
+
+
+    proc = (__GLXdispatchVendorPrivProcPtr)
+      __glXGetProtocolDecodeFunction(& VendorPriv_dispatch_info,
+				     vendorcode, 0);
+    if (proc != NULL) {
+	return (*proc)(cl, (GLbyte*)req);
+    }
+
+    cl->client->errorValue = vendorcode;
+    return __glXError(GLXUnsupportedPrivateRequest);
+}
+
+int __glXDisp_QueryExtensionsString(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryExtensionsStringReq *req = (xGLXQueryExtensionsStringReq *) pc;
+    xGLXQueryExtensionsStringReply reply;
+    __GLXscreen *pGlxScreen;
+    size_t n, length;
+    char *buf;
+    int err;
+
+    if (!validGlxScreen(client, req->screen, &pGlxScreen, &err))
+	return err;
+
+    n = strlen(pGlxScreen->GLXextensions) + 1;
+    length = __GLX_PAD(n) >> 2;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = length;
+    reply.n = n;
+
+    /* Allocate buffer to make sure it's a multiple of 4 bytes big.*/
+    buf = (char *) xalloc(length << 2);
+    if (buf == NULL)
+        return BadAlloc;
+    memcpy(buf, pGlxScreen->GLXextensions, n);
+
+    if (client->swapped) {
+        glxSwapQueryExtensionsStringReply(client, &reply, buf);
+    } else {
+        WriteToClient(client, sz_xGLXQueryExtensionsStringReply,(char *)&reply);
+        WriteToClient(client, (int)(length << 2), (char *)buf);
+    }
+
+    xfree(buf);
+    return Success;
+}
+
+int __glXDisp_QueryServerString(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryServerStringReq *req = (xGLXQueryServerStringReq *) pc;
+    xGLXQueryServerStringReply reply;
+    size_t n, length;
+    const char *ptr;
+    char *buf;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    if (!validGlxScreen(client, req->screen, &pGlxScreen, &err))
+	return err;
+
+    switch(req->name) {
+	case GLX_VENDOR:
+	    ptr = pGlxScreen->GLXvendor;
+	    break;
+	case GLX_VERSION:
+	    ptr = pGlxScreen->GLXversion;
+	    break;
+	case GLX_EXTENSIONS:
+	    ptr = pGlxScreen->GLXextensions;
+	    break;
+	default:
+	    return BadValue; 
+    }
+
+    n = strlen(ptr) + 1;
+    length = __GLX_PAD(n) >> 2;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.length = length;
+    reply.n = n;
+
+    buf = (char *) xalloc(length << 2);
+    if (buf == NULL) {
+        return BadAlloc;
+    }
+    memcpy(buf, ptr, n);
+
+    if (client->swapped) {
+        glxSwapQueryServerStringReply(client, &reply, buf);
+    } else {
+        WriteToClient(client, sz_xGLXQueryServerStringReply, (char *)&reply);
+        WriteToClient(client, (int)(length << 2), buf);
+    }
+
+    xfree(buf);
+    return Success;
+}
+
+int __glXDisp_ClientInfo(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXClientInfoReq *req = (xGLXClientInfoReq *) pc;
+    const char *buf;
+   
+    cl->GLClientmajorVersion = req->major;
+    cl->GLClientminorVersion = req->minor;
+    if (cl->GLClientextensions)
+	xfree(cl->GLClientextensions);
+    buf = (const char *)(req+1);
+    cl->GLClientextensions = xstrdup(buf);
+
+    return Success;
+}