xserver libX11 libxtrans mesa pixman xkeyboard-config git update 27 Apr 2011

1 files changed, 2334 insertions, 2331 deletions

diff --git a/xorg-server/glx/glxcmds.c b/xorg-server/glx/glxcmds.c
index b524597a8..d5b764fd0 100644
--- a/xorg-server/glx/glxcmds.c
+++ b/xorg-server/glx/glxcmds.c
@@ -1,2331 +1,2334 @@
-/*

- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)

- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.

- *

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the "Software"),

- * to deal in the Software without restriction, including without limitation

- * the rights to use, copy, modify, merge, publish, distribute, sublicense,

- * and/or sell copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following conditions:

- *

- * The above copyright notice including the dates of first publication and

- * either this permission notice or a reference to

- * http://oss.sgi.com/projects/FreeB/

- * shall be included in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF

- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

- * SOFTWARE.

- *

- * Except as contained in this notice, the name of Silicon Graphics, Inc.

- * shall not be used in advertising or otherwise to promote the sale, use or

- * other dealings in this Software without prior written authorization from

- * Silicon Graphics, Inc.

- */

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <string.h>

-#include <assert.h>

-

-#include "glxserver.h"

-#include <GL/glxtokens.h>

-#include <unpack.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"

-

-static int

-validGlxScreen(ClientPtr client, int screen, __GLXscreen **pGlxScreen, int *err)

-{

-    /*

-    ** Check if screen exists.

-    */

-    if (screen < 0 || 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;

-}

-

-static int

-validGlxContext(ClientPtr client, XID id, int access_mode,

-		__GLXcontext **context, int *err)

-{

-    *err = dixLookupResourceByType((pointer *) context, id,

-				   __glXContextRes, client, access_mode);

-    if (*err != Success || (*context)->idExists == GL_FALSE) {

-	client->errorValue = id;

-	if (*err == BadValue || *err == Success)

-	    *err = __glXError(GLXBadContext);

-	return FALSE;

-    }

-

-    return TRUE;

-}

-

-static int

-validGlxDrawable(ClientPtr client, XID id, int type, int access_mode,

-		 __GLXdrawable **drawable, int *err)

-{

-    int rc;

-

-    rc = dixLookupResourceByType((pointer *) drawable, id,

-				 __glXDrawableRes, client, access_mode);

-    if (rc != Success && rc != BadValue) {

-	*err = rc;

-	client->errorValue = id;

-	return FALSE;

-    }

-

-    /* If the ID of the glx drawable we looked up doesn't match the id

-     * we looked for, it's because we looked it up under the X

-     * drawable ID (see DoCreateGLXDrawable). */

-    if (rc == BadValue ||

-	(*drawable)->drawId != id ||

-	(type != GLX_DRAWABLE_ANY && type != (*drawable)->type)) {

-	client->errorValue = id;

-	switch (type) {

-	case GLX_DRAWABLE_WINDOW:

-	    *err = __glXError(GLXBadWindow);

-	    return FALSE;

-	case GLX_DRAWABLE_PIXMAP:

-	    *err = __glXError(GLXBadPixmap);

-	    return FALSE;

-	case GLX_DRAWABLE_PBUFFER:

-	    *err = __glXError(GLXBadPbuffer);

-	    return FALSE;

-	case GLX_DRAWABLE_ANY:

-	    *err = __glXError(GLXBadDrawable);

-	    return FALSE;

-	}

-    }

-

-    return TRUE;

-}

-

-void

-__glXContextDestroy(__GLXcontext *context)

-{

-    __glXFlushContextCache();

-}

-

-static void __glXdirectContextDestroy(__GLXcontext *context)

-{

-    __glXContextDestroy(context);

-    free(context);

-}

-

-static __GLXcontext *__glXdirectContextCreate(__GLXscreen *screen,

-					      __GLXconfig *modes,

-					      __GLXcontext *shareContext)

-{

-    __GLXcontext *context;

-

-    context = calloc(1, sizeof (__GLXcontext));

-    if (context == NULL)

-	return NULL;

-

-    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;

-    int err;

-    

-    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 {

-	if (!validGlxContext(client, shareList, DixReadAccess,

-			     &shareglxc, &err))

-	    return err;

-

-	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;

-

-    __glXAddToContextList(glxc);

-

-    return Success;

-}

-

-int __glXDisp_CreateContext(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateContextReq *req = (xGLXCreateContextReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXCreateContextReq);

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateNewContextReq *req = (xGLXCreateNewContextReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXCreateNewContextReq);

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateContextWithConfigSGIXReq *req = 

-	(xGLXCreateContextWithConfigSGIXReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXCreateContextWithConfigSGIXReq);

-

-    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;

-    __GLXcontext *glxc;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXDestroyContextReq);

-

-    if (!validGlxContext(cl->client, req->context, DixDestroyAccess,

-			 &glxc, &err))

-	    return err;

-

-    glxc->idExists = GL_FALSE;

-    if (!glxc->isCurrent)

-        FreeResourceByType(req->context, __glXContextRes, FALSE);

-

-    return Success;

-}

-

-/*

- * This will return "deleted" contexts, ie, where idExists is GL_FALSE.

- * Contrast validGlxContext, which will not.  We're cheating here and

- * using the XID as the context tag, which is fine as long as we defer

- * actually destroying the context until it's no longer referenced, and

- * block clients from trying to MakeCurrent on contexts that are on the

- * way to destruction.  Notice that DoMakeCurrent calls validGlxContext

- * for new contexts but __glXLookupContextByTag for previous contexts.

- */

-__GLXcontext *__glXLookupContextByTag(__GLXclientState *cl, GLXContextTag tag)

-{

-    __GLXcontext *ret;

-

-    if (dixLookupResourceByType((void **)&ret, tag, __glXContextRes,

-                                cl->client, DixUseAccess) == Success)

-        return ret;

-

-    return NULL;

-}

-

-/*****************************************************************************/

-

-static void StopUsingContext(__GLXcontext *glxc)

-{

-    if (glxc) {

-	if (glxc == __glXLastContext) {

-	    /* Tell server GL library */

-	    __glXLastContext = 0;

-	}

-	glxc->isCurrent = GL_FALSE;

-	if (!glxc->idExists) {

-            FreeResourceByType(glxc->id, __glXContextRes, FALSE);

-	}

-    }

-}

-

-static void StartUsingContext(__GLXclientState *cl, __GLXcontext *glxc)

-{

-    glxc->isCurrent = GL_TRUE;

-    __glXLastContext = glxc;	

-}

-

-/**

- * This is a helper function to handle the legacy (pre GLX 1.3) cases

- * where passing an X window to glXMakeCurrent is valid.  Given a

- * resource ID, look up the GLX drawable if available, otherwise, make

- * sure it's an X window and create a GLX drawable one the fly.

- */

-static __GLXdrawable *

-__glXGetDrawable(__GLXcontext *glxc, GLXDrawable drawId, ClientPtr client,

-		 int *error)

-{

-    DrawablePtr pDraw;

-    __GLXdrawable *pGlxDraw;

-    int rc;

-

-    if (validGlxDrawable(client, drawId, GLX_DRAWABLE_ANY,

-			 DixWriteAccess, &pGlxDraw, &rc)) {

-	if (glxc != NULL && pGlxDraw->config != glxc->config) {

-	    client->errorValue = drawId;

-	    *error = BadMatch;

-	    return NULL;

-	}

-

-	return pGlxDraw;

-    }

-

-    /* No active context and an unknown drawable, bail. */

-    if (glxc == NULL) {

-	    client->errorValue = drawId;

-	    *error = BadMatch;

-	    return NULL;

-    }

-

-    /* The drawId wasn't a GLX drawable.  Make sure it's a window and

-     * create a GLXWindow for it.  Check that the drawable screen

-     * matches the context screen and that the context fbconfig is

-     * compatible with the window visual. */

-

-    rc = dixLookupDrawable(&pDraw, drawId, client, 0, DixGetAttrAccess);

-    if (rc != Success || pDraw->type != DRAWABLE_WINDOW) {

-	client->errorValue = drawId;

-	*error = __glXError(GLXBadDrawable);

-	return NULL;

-    }

-

-    if (pDraw->pScreen != glxc->pGlxScreen->pScreen) {

-	client->errorValue = pDraw->pScreen->myNum;

-	*error = BadMatch;

-	return NULL;

-    }

-

-    if (!validGlxFBConfigForWindow(client, glxc->config, pDraw, error))

-	return NULL;

-

-    pGlxDraw = glxc->pGlxScreen->createDrawable(client, glxc->pGlxScreen,

-						pDraw, drawId,

-						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;

-    int 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;

-

-	if (!validGlxContext(client, contextId, DixUseAccess, &glxc, &error))

-	    return error;

-	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 (prevglxc->hasUnflushedCommands) {

-	    if (__glXForceCurrent(cl, tag, (int *)&error)) {

-		CALL_Flush( GET_DISPATCH(), () );

-		prevglxc->hasUnflushedCommands = GL_FALSE;

-	    } else {

-		return error;

-	    }

-	}

-

-	/*

-	** Make the previous context not current.

-	*/

-	if (!(*prevglxc->loseCurrent)(prevglxc)) {

-	    return __glXError(GLXBadContext);

-	}

-	__glXFlushContextCache();

-	if (!prevglxc->isDirect) {

-	    prevglxc->drawPriv = NULL;

-	    prevglxc->readPriv = NULL;

-	}

-    }

-	

-

-    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);

-	}

-

-	glxc->isCurrent = GL_TRUE;

-    }

-

-    StopUsingContext(prevglxc);

-

-    if (glxc) {

-	StartUsingContext(cl, glxc);

-	reply.contextTag = glxc->id;

-    } 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)

-{

-    ClientPtr client = cl->client;

-    xGLXMakeCurrentReq *req = (xGLXMakeCurrentReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXMakeCurrentReq);

-

-    return DoMakeCurrent( cl, req->drawable, req->drawable,

-			  req->context, req->oldContextTag );

-}

-

-int __glXDisp_MakeContextCurrent(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXMakeContextCurrentReq *req = (xGLXMakeContextCurrentReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXMakeContextCurrentReq);

-

-    return DoMakeCurrent( cl, req->drawable, req->readdrawable,

-			  req->context, req->oldContextTag );

-}

-

-int __glXDisp_MakeCurrentReadSGI(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXMakeCurrentReadSGIReq *req = (xGLXMakeCurrentReadSGIReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXMakeCurrentReadSGIReq);

-

-    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;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXIsDirectReq);

-

-    if (!validGlxContext(cl->client, req->context, DixReadAccess, &glxc, &err))

-	return err;

-

-    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;

-

-    REQUEST_SIZE_MATCH(xGLXQueryVersionReq);

-

-    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 = glxMajorVersion;

-    reply.minorVersion = glxMinorVersion;

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXWaitGLReq *req = (xGLXWaitGLReq *)pc;

-    GLXContextTag tag;

-    __GLXcontext *glxc = NULL;

-    int error;

-

-    REQUEST_SIZE_MATCH(xGLXWaitGLReq);

-

-    tag = req->contextTag;

-    if (tag) {

-	glxc = __glXLookupContextByTag(cl, tag);

-	if (!glxc)

-	    return __glXError(GLXBadContextTag);

-    

-	if (!__glXForceCurrent(cl, req->contextTag, &error))

-	    return error;

-

-	CALL_Finish( GET_DISPATCH(), () );

-    }

-

-    if (glxc && glxc->drawPriv->waitGL)

-	(*glxc->drawPriv->waitGL)(glxc->drawPriv);

-

-    return Success;

-}

-

-int __glXDisp_WaitX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXWaitXReq *req = (xGLXWaitXReq *)pc;

-    GLXContextTag tag;

-    __GLXcontext *glxc = NULL;

-    int error;

-

-    REQUEST_SIZE_MATCH(xGLXWaitXReq);

-

-    tag = req->contextTag;

-    if (tag) {

-	glxc = __glXLookupContextByTag(cl, tag);

-	if (!glxc)

-	    return __glXError(GLXBadContextTag);

-    

-	if (!__glXForceCurrent(cl, req->contextTag, &error))

-	    return error;

-    }

-

-    if (glxc && glxc->drawPriv->waitX)

-	(*glxc->drawPriv->waitX)(glxc->drawPriv);

-

-    return Success;

-}

-

-int __glXDisp_CopyContext(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXCopyContextReq *req = (xGLXCopyContextReq *) pc;

-    GLXContextID source;

-    GLXContextID dest;

-    GLXContextTag tag;

-    unsigned long mask;

-    __GLXcontext *src, *dst;

-    int error;

-

-    REQUEST_SIZE_MATCH(xGLXCopyContextReq);

-

-    source = req->source;

-    dest = req->dest;

-    tag = req->contextTag;

-    mask = req->mask;

-    if (!validGlxContext(cl->client, source, DixReadAccess, &src, &error))

-	return error;

-    if (!validGlxContext(cl->client, dest, DixWriteAccess, &dst, &error))

-	return error;

-

-    /*

-    ** 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(), () );

-	    tagcx->hasUnflushedCommands = GL_FALSE;

-	} 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;

-}

-

-enum {

-    GLX_VIS_CONFIG_UNPAIRED = 18,

-    GLX_VIS_CONFIG_PAIRED = 20

-};

-

-enum {

-    GLX_VIS_CONFIG_TOTAL = GLX_VIS_CONFIG_UNPAIRED + GLX_VIS_CONFIG_PAIRED

-};

-

-int __glXDisp_GetVisualConfigs(__GLXclientState *cl, GLbyte *pc)

-{

-    xGLXGetVisualConfigsReq *req = (xGLXGetVisualConfigsReq *) pc;

-    ClientPtr client = cl->client;

-    xGLXGetVisualConfigsReply reply;

-    __GLXscreen *pGlxScreen;

-    __GLXconfig *modes;

-    CARD32 buf[GLX_VIS_CONFIG_TOTAL];

-    int p, i, err;

-    __GLX_DECLARE_SWAP_VARIABLES;

-    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;

-

-    REQUEST_SIZE_MATCH(xGLXGetVisualConfigsReq);

-

-    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))

-	return err;

-

-    reply.numVisuals = pGlxScreen->numVisuals;

-    reply.numProps = GLX_VIS_CONFIG_TOTAL;

-    reply.length = (reply.numVisuals * __GLX_SIZE_CARD32 * GLX_VIS_CONFIG_TOTAL) >> 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->renderType & GLX_RGBA_BIT) ? GL_TRUE : GL_FALSE;

-

-	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;

-

-	assert(p == GLX_VIS_CONFIG_UNPAIRED);

-	/* 

-	** 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++] = GLX_SAMPLES_SGIS;

-	buf[p++] = modes->samples;

-	buf[p++] = GLX_SAMPLE_BUFFERS_SGIS;

-	buf[p++] = modes->sampleBuffers;

-	buf[p++] = 0; /* copy over visualSelectGroup (GLX_VISUAL_SELECT_GROUP_SGIX)? */

-	buf[p++] = 0;

-

-	assert(p == GLX_VIS_CONFIG_TOTAL);

-	if (client->swapped) {

-	    __GLX_SWAP_INT_ARRAY(buf, p);

-	}

-	WriteToClient(client, __GLX_SIZE_CARD32 * p, (char *)buf);

-    }

-    return Success;

-}

-

-#define __GLX_TOTAL_FBCONFIG_ATTRIBS (36)

-#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->renderType & GLX_RGBA_BIT) ? GL_TRUE : GL_FALSE );

-	WRITE_PAIR( GLX_RENDER_TYPE,      modes->renderType );

-	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_SAMPLES_SGIS, modes->samples );

-	WRITE_PAIR( GLX_SAMPLE_BUFFERS_SGIS, modes->sampleBuffers );

-	/* GLX_VISUAL_SELECT_GROUP_SGIX ? */

-	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)

-{

-    ClientPtr client = cl->client;

-    xGLXGetFBConfigsReq *req = (xGLXGetFBConfigsReq *) pc;

-    REQUEST_SIZE_MATCH(xGLXGetFBConfigsReq);

-    return DoGetFBConfigs(cl, req->screen);

-}

-

-int __glXDisp_GetFBConfigsSGIX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXGetFBConfigsSGIXReq *req = (xGLXGetFBConfigsSGIXReq *) pc;

-    /* work around mesa bug, don't use REQUEST_SIZE_MATCH */

-    REQUEST_AT_LEAST_SIZE(xGLXGetFBConfigsSGIXReq);

-    return DoGetFBConfigs(cl, req->screen);

-}

-

-GLboolean

-__glXDrawableInit(__GLXdrawable *drawable,

-		  __GLXscreen *screen, DrawablePtr pDraw, int type,

-		  XID drawId, __GLXconfig *config)

-{

-    drawable->pDraw = pDraw;

-    drawable->type = type;

-    drawable->drawId = drawId;

-    drawable->config = config;

-    drawable->eventMask = 0;

-

-    return GL_TRUE;

-}

-

-void

-__glXDrawableRelease(__GLXdrawable *drawable)

-{

-}

-

-static int 

-DoCreateGLXDrawable(ClientPtr client, __GLXscreen *pGlxScreen,

-		    __GLXconfig *config, DrawablePtr pDraw, XID drawableId,

-		    XID glxDrawableId, int type)

-{

-    __GLXdrawable *pGlxDraw;

-

-    if (pGlxScreen->pScreen != pDraw->pScreen)

-	return BadMatch;

-

-    pGlxDraw = pGlxScreen->createDrawable(client, pGlxScreen, pDraw,

-					  drawableId, type,

-					  glxDrawableId, config);

-    if (pGlxDraw == NULL)

-	return BadAlloc;

-

-    if (!AddResource(glxDrawableId, __glXDrawableRes, pGlxDraw)) {

-	pGlxDraw->destroy (pGlxDraw);

-	return BadAlloc;

-    }

-

-    /* Add the glx drawable under the XID of the underlying X drawable

-     * too.  That way we'll get a callback in DrawableGone and can

-     * clean up properly when the drawable is destroyed. */

-    if (drawableId != glxDrawableId &&

-	!AddResource(pDraw->id, __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;

-

-    LEGAL_NEW_RESOURCE(glxDrawableId, client);

-

-    err = dixLookupDrawable(&pDraw, drawableId, client, 0, DixAddAccess);

-    if (err != Success) {

-	client->errorValue = drawableId;

-	return err;

-    }

-    if (pDraw->type != DRAWABLE_PIXMAP) {

-	client->errorValue = drawableId;

-	return BadPixmap;

-    }

-

-    err = DoCreateGLXDrawable(client, pGlxScreen, config, pDraw, drawableId,

-			      glxDrawableId, GLX_DRAWABLE_PIXMAP);

-

-    return err;

-}

-

-static void

-determineTextureTarget(ClientPtr client, XID glxDrawableID,

-		       CARD32 *attribs, CARD32 numAttribs)

-{

-    GLenum target = 0;

-    GLenum format = 0;

-    int i, err;

-    __GLXdrawable *pGlxDraw;

-

-    if (!validGlxDrawable(client, glxDrawableID, GLX_DRAWABLE_PIXMAP,

-			  DixWriteAccess, &pGlxDraw, &err))

-	/* We just added it in CreatePixmap, so we should never get here. */

-	return;

-

-    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 (attribs[2 * i] == GLX_TEXTURE_FORMAT_EXT)

-		format = attribs[2 * i + 1];

-    }

- 

-    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;

-    pGlxDraw->format = format;

-}

-

-int __glXDisp_CreateGLXPixmap(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateGLXPixmapReq *req = (xGLXCreateGLXPixmapReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXCreateGLXPixmapReq);

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXCreatePixmapReq *req = (xGLXCreatePixmapReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_AT_LEAST_SIZE(xGLXCreatePixmapReq);

-    if (req->numAttribs > (UINT32_MAX >> 3)) {

-	client->errorValue = req->numAttribs;

-	return BadValue;

-    }

-    REQUEST_FIXED_SIZE(xGLXCreatePixmapReq, req->numAttribs << 3);

-

-    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(cl->client, req->glxpixmap,

-			   (CARD32*) (req + 1), req->numAttribs);

-

-    return Success;

-}

-

-int __glXDisp_CreateGLXPixmapWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateGLXPixmapWithConfigSGIXReq *req = 

-	(xGLXCreateGLXPixmapWithConfigSGIXReq *) pc;

-    __GLXconfig *config;

-    __GLXscreen *pGlxScreen;

-    int err;

-

-    REQUEST_SIZE_MATCH(xGLXCreateGLXPixmapWithConfigSGIXReq);

-

-    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)

-{

-    __GLXdrawable *pGlxDraw;

-    int err;

-

-    if (!validGlxDrawable(cl->client, glxdrawable, type,

-			  DixDestroyAccess, &pGlxDraw, &err))

-	return err;

-

-    FreeResource(glxdrawable, FALSE);

-

-    return Success;

-}

-

-int __glXDisp_DestroyGLXPixmap(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXDestroyGLXPixmapReq *req = (xGLXDestroyGLXPixmapReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXDestroyGLXPixmapReq);

-

-    return DoDestroyDrawable(cl, req->glxpixmap, GLX_DRAWABLE_PIXMAP);

-}

-

-int __glXDisp_DestroyPixmap(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXDestroyPixmapReq *req = (xGLXDestroyPixmapReq *) pc;

-

-    /* should be REQUEST_SIZE_MATCH, but mesa's glXDestroyPixmap used to set

-     * length to 3 instead of 2 */

-    REQUEST_AT_LEAST_SIZE(xGLXDestroyPixmapReq);

-

-    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;

-

-    LEGAL_NEW_RESOURCE(glxDrawableId, client);

-

-    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);

-

-    /* Assign the pixmap the same id as the pbuffer and add it as a

-     * resource so it and the DRI2 drawable will be reclaimed when the

-     * pbuffer is destroyed. */

-    pPixmap->drawable.id = glxDrawableId;

-    if (!AddResource(pPixmap->drawable.id, RT_PIXMAP, pPixmap))

-	return BadAlloc;

-

-    return DoCreateGLXDrawable(client, pGlxScreen, config, &pPixmap->drawable,

-			       glxDrawableId, glxDrawableId,

-			       GLX_DRAWABLE_PBUFFER);

-}

-

-int __glXDisp_CreatePbuffer(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXCreatePbufferReq	*req = (xGLXCreatePbufferReq *) pc;

-    CARD32			*attrs;

-    int				 width, height, i;

-

-    REQUEST_AT_LEAST_SIZE(xGLXCreatePbufferReq);

-    if (req->numAttribs > (UINT32_MAX >> 3)) {

-	client->errorValue = req->numAttribs;

-	return BadValue;

-    }

-    REQUEST_FIXED_SIZE(xGLXCreatePbufferReq, req->numAttribs << 3);

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXCreateGLXPbufferSGIXReq *req = (xGLXCreateGLXPbufferSGIXReq *) pc;

-

-    REQUEST_AT_LEAST_SIZE(xGLXCreateGLXPbufferSGIXReq);

-

-    return DoCreatePbuffer(cl->client, req->screen, req->fbconfig,

-			   req->width, req->height, req->pbuffer);

-}

-

-int __glXDisp_DestroyPbuffer(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXDestroyPbufferReq *req = (xGLXDestroyPbufferReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXDestroyPbufferReq);

-

-    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);

-}

-

-int __glXDisp_DestroyGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXDestroyGLXPbufferSGIXReq *req = (xGLXDestroyGLXPbufferSGIXReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXDestroyGLXPbufferSGIXReq);

-

-    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);

-}

-

-static int

-DoChangeDrawableAttributes(ClientPtr client, XID glxdrawable,

-			   int numAttribs, CARD32 *attribs)

-{

-    __GLXdrawable *pGlxDraw;

-    int i, err;

-

-    if (!validGlxDrawable(client, glxdrawable, GLX_DRAWABLE_ANY,

-			  DixSetAttrAccess, &pGlxDraw, &err))

-	return err;

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXChangeDrawableAttributesReq *req =

-	(xGLXChangeDrawableAttributesReq *) pc;

-

-    REQUEST_AT_LEAST_SIZE(xGLXChangeDrawableAttributesReq);

-    if (req->numAttribs > (UINT32_MAX >> 3)) {

-	client->errorValue = req->numAttribs;

-	return BadValue;

-    }

-#if 0

-    /* mesa sends an additional 8 bytes */

-    REQUEST_FIXED_SIZE(xGLXChangeDrawableAttributesReq, req->numAttribs << 3);

-#else

-    if (((sizeof(xGLXChangeDrawableAttributesReq) + (req->numAttribs << 3)) >> 2) < client->req_len)

-	    return BadLength;

-#endif

-

-    return DoChangeDrawableAttributes(cl->client, req->drawable,

-				      req->numAttribs, (CARD32 *) (req + 1));

-}

-

-int __glXDisp_ChangeDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXChangeDrawableAttributesSGIXReq *req =

-	(xGLXChangeDrawableAttributesSGIXReq *)pc;

-

-    REQUEST_AT_LEAST_SIZE(xGLXChangeDrawableAttributesSGIXReq);

-    if (req->numAttribs > (UINT32_MAX >> 3)) {

-	client->errorValue = req->numAttribs;

-	return BadValue;

-    }

-    REQUEST_FIXED_SIZE(xGLXChangeDrawableAttributesSGIXReq, req->numAttribs << 3);

-

-    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;

-

-    REQUEST_AT_LEAST_SIZE(xGLXCreateWindowReq);

-    if (req->numAttribs > (UINT32_MAX >> 3)) {

-	client->errorValue = req->numAttribs;

-	return BadValue;

-    }

-    REQUEST_FIXED_SIZE(xGLXCreateWindowReq, req->numAttribs << 3);

-

-    LEGAL_NEW_RESOURCE(req->glxwindow, client);

-

-    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->window,

-			       req->glxwindow, GLX_DRAWABLE_WINDOW);

-}

-

-int __glXDisp_DestroyWindow(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXDestroyWindowReq *req = (xGLXDestroyWindowReq *) pc;

-

-    /* mesa's glXDestroyWindow used to set length to 3 instead of 2 */

-    REQUEST_AT_LEAST_SIZE(xGLXDestroyWindowReq);

-

-    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;

-    XID drawId;

-    __GLXcontext *glxc = NULL;

-    __GLXdrawable *pGlxDraw;

-    int error;

-

-    REQUEST_SIZE_MATCH(xGLXSwapBuffersReq);

-

-    tag = req->contextTag;

-    drawId = req->drawable;

-    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(), () );

-	    glxc->hasUnflushedCommands = GL_FALSE;

-	} else {

-	    return error;

-	}

-    }

-

-    pGlxDraw = __glXGetDrawable(glxc, drawId, client, &error);

-    if (pGlxDraw == NULL)

-	return error;

-

-    if (pGlxDraw->type == DRAWABLE_WINDOW &&

-	(*pGlxDraw->swapBuffers)(cl->client, 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;

-    int err;

-

-    if (!validGlxContext(cl->client, gcId, DixReadAccess, &ctx, &err))

-	return err;

-

-    nProps = 3;

-    reply.length = nProps << 1;

-    reply.type = X_Reply;

-    reply.sequenceNumber = client->sequence;

-    reply.n = nProps;

-

-    nReplyBytes = reply.length << 2;

-    sendBuf = (int *)malloc((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);

-    }

-    free((char *)sendBuf);

-

-    return Success;

-}

-

-int __glXDisp_QueryContextInfoEXT(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXQueryContextInfoEXTReq *req = (xGLXQueryContextInfoEXTReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXQueryContextInfoEXTReq);

-

-    return DoQueryContext(cl, req->context);

-}

-

-int __glXDisp_QueryContext(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXQueryContextReq *req = (xGLXQueryContextReq *) pc;

-

-    REQUEST_SIZE_MATCH(xGLXQueryContextReq);

-

-    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;

-    CARD32		 num_attribs;

-

-    if ((sizeof(xGLXVendorPrivateReq) + 12) >> 2 > client->req_len)

-	return BadLength;

-

-    pc += __GLX_VENDPRIV_HDR_SIZE;

-

-    drawId = *((CARD32 *) (pc));

-    buffer = *((INT32 *)  (pc + 4));

-    num_attribs = *((CARD32 *) (pc + 8));

-    if (num_attribs > (UINT32_MAX >> 3)) {

-	client->errorValue = num_attribs;

-	return BadValue;

-    }

-    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 12 + (num_attribs << 3));

-

-    if (buffer != GLX_FRONT_LEFT_EXT)

-	return __glXError(GLXBadPixmap);

-

-    context = __glXForceCurrent (cl, req->contextTag, &error);

-    if (!context)

-	return error;

-

-    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_PIXMAP,

-			  DixReadAccess, &pGlxDraw, &error))

-	return error;

-

-    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;

-

-    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 8);

-

-    pc += __GLX_VENDPRIV_HDR_SIZE;

-

-    drawId = *((CARD32 *) (pc));

-    buffer = *((INT32 *)  (pc + 4));

-    

-    context = __glXForceCurrent (cl, req->contextTag, &error);

-    if (!context)

-	return error;

-

-    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_PIXMAP,

-			  DixReadAccess, &pGlxDraw, &error))

-	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;

-

-    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 20);

-

-    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(), () );

-	    glxc->hasUnflushedCommands = GL_FALSE;

-	} 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;

-

-    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_ANY,

-			  DixGetAttrAccess, &pGlxDraw, &error))

-	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)

-{

-    ClientPtr client = cl->client;

-    xGLXGetDrawableAttributesReq *req = (xGLXGetDrawableAttributesReq *)pc;

-

-    /* this should be REQUEST_SIZE_MATCH, but mesa sends an additional 4 bytes */

-    REQUEST_AT_LEAST_SIZE(xGLXGetDrawableAttributesReq);

-

-    return DoGetDrawableAttributes(cl, req->drawable);

-}

-

-int __glXDisp_GetDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXGetDrawableAttributesSGIXReq *req =

-	(xGLXGetDrawableAttributesSGIXReq *)pc;

-    

-    REQUEST_SIZE_MATCH(xGLXGetDrawableAttributesSGIXReq);

-

-    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;

-

-    REQUEST_AT_LEAST_SIZE(xGLXRenderReq);

-

-    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;

-

-	if (left < sizeof(__GLXrenderHeader))

-	    return BadLength;

-

-	/*

-	** 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++;

-    }

-    glxc->hasUnflushedCommands = GL_TRUE;

-    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 *) malloc(cmdlen);

-	    } else {

-		cl->largeCmdBuf = (GLbyte *) realloc(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);

-	    glxc->hasUnflushedCommands = GL_TRUE;

-

-	    /*

-	    ** Reset for the next RenderLarge series.

-	    */

-	    __glXResetLargeCommandStatus(cl);

-	} else {

-	    /*

-	    ** This is neither the first nor the last request.

-	    */

-	}

-	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)

-{

-    ClientPtr client = cl->client;

-    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;

-    GLint vendorcode = req->vendorCode;

-    __GLXdispatchVendorPrivProcPtr proc;

-

-    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateReq);

-

-    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)

-{

-    ClientPtr client = cl->client;

-    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;

-    GLint vendorcode = req->vendorCode;

-    __GLXdispatchVendorPrivProcPtr proc;

-

-    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateReq);

-

-    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;

-

-    REQUEST_SIZE_MATCH(xGLXQueryExtensionsStringReq);

-

-    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 *) malloc(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);

-    }

-

-    free(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;

-    char ver_str[16];

-

-    REQUEST_SIZE_MATCH(xGLXQueryServerStringReq);

-

-    if (!validGlxScreen(client, req->screen, &pGlxScreen, &err))

-	return err;

-

-    switch(req->name) {

-	case GLX_VENDOR:

-	    ptr = pGlxScreen->GLXvendor;

-	    break;

-	case GLX_VERSION:

-	    /* Return to the server version rather than the screen version

-	     * to prevent confusion when they do not match.

-	     */

-	    snprintf(ver_str, 16, "%d.%d", glxMajorVersion, glxMinorVersion);

-	    ptr = ver_str;

-	    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 *) malloc(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);

-    }

-

-    free(buf);

-    return Success;

-}

-

-int __glXDisp_ClientInfo(__GLXclientState *cl, GLbyte *pc)

-{

-    ClientPtr client = cl->client;

-    xGLXClientInfoReq *req = (xGLXClientInfoReq *) pc;

-    const char *buf;

-   

-    REQUEST_AT_LEAST_SIZE(xGLXClientInfoReq);

-

-    buf = (const char *)(req+1);

-    if (!memchr(buf, 0, (client->req_len << 2) - sizeof(xGLXClientInfoReq)))

-	return BadLength;

-

-    cl->GLClientmajorVersion = req->major;

-    cl->GLClientminorVersion = req->minor;

-    free(cl->GLClientextensions);

-    cl->GLClientextensions = strdup(buf);

-

-    return Success;

-}

+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <string.h>
+#include <assert.h>
+
+#include "glxserver.h"
+#include <GL/glxtokens.h>
+#include <unpack.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"
+
+static int
+validGlxScreen(ClientPtr client, int screen, __GLXscreen **pGlxScreen, int *err)
+{
+    /*
+    ** Check if screen exists.
+    */
+    if (screen < 0 || 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;
+}
+
+static int
+validGlxContext(ClientPtr client, XID id, int access_mode,
+		__GLXcontext **context, int *err)
+{
+    *err = dixLookupResourceByType((pointer *) context, id,
+				   __glXContextRes, client, access_mode);
+    if (*err != Success || (*context)->idExists == GL_FALSE) {
+	client->errorValue = id;
+	if (*err == BadValue || *err == Success)
+	    *err = __glXError(GLXBadContext);
+	return FALSE;
+    }
+
+    return TRUE;
+}
+
+static int
+validGlxDrawable(ClientPtr client, XID id, int type, int access_mode,
+		 __GLXdrawable **drawable, int *err)
+{
+    int rc;
+
+    rc = dixLookupResourceByType((pointer *) drawable, id,
+				 __glXDrawableRes, client, access_mode);
+    if (rc != Success && rc != BadValue) {
+	*err = rc;
+	client->errorValue = id;
+	return FALSE;
+    }
+
+    /* If the ID of the glx drawable we looked up doesn't match the id
+     * we looked for, it's because we looked it up under the X
+     * drawable ID (see DoCreateGLXDrawable). */
+    if (rc == BadValue ||
+	(*drawable)->drawId != id ||
+	(type != GLX_DRAWABLE_ANY && type != (*drawable)->type)) {
+	client->errorValue = id;
+	switch (type) {
+	case GLX_DRAWABLE_WINDOW:
+	    *err = __glXError(GLXBadWindow);
+	    return FALSE;
+	case GLX_DRAWABLE_PIXMAP:
+	    *err = __glXError(GLXBadPixmap);
+	    return FALSE;
+	case GLX_DRAWABLE_PBUFFER:
+	    *err = __glXError(GLXBadPbuffer);
+	    return FALSE;
+	case GLX_DRAWABLE_ANY:
+	    *err = __glXError(GLXBadDrawable);
+	    return FALSE;
+	}
+    }
+
+    return TRUE;
+}
+
+void
+__glXContextDestroy(__GLXcontext *context)
+{
+    __glXFlushContextCache();
+}
+
+static void __glXdirectContextDestroy(__GLXcontext *context)
+{
+    __glXContextDestroy(context);
+    free(context);
+}
+
+static __GLXcontext *__glXdirectContextCreate(__GLXscreen *screen,
+					      __GLXconfig *modes,
+					      __GLXcontext *shareContext)
+{
+    __GLXcontext *context;
+
+    context = calloc(1, sizeof (__GLXcontext));
+    if (context == NULL)
+	return NULL;
+
+    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;
+    int err;
+    
+    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 {
+	if (!validGlxContext(client, shareList, DixReadAccess,
+			     &shareglxc, &err))
+	    return err;
+
+	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;
+
+    __glXAddToContextList(glxc);
+
+    return Success;
+}
+
+int __glXDisp_CreateContext(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateContextReq *req = (xGLXCreateContextReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXCreateContextReq);
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateNewContextReq *req = (xGLXCreateNewContextReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXCreateNewContextReq);
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateContextWithConfigSGIXReq *req = 
+	(xGLXCreateContextWithConfigSGIXReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXCreateContextWithConfigSGIXReq);
+
+    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;
+    __GLXcontext *glxc;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXDestroyContextReq);
+
+    if (!validGlxContext(cl->client, req->context, DixDestroyAccess,
+			 &glxc, &err))
+	    return err;
+
+    glxc->idExists = GL_FALSE;
+    if (!glxc->isCurrent)
+        FreeResourceByType(req->context, __glXContextRes, FALSE);
+
+    return Success;
+}
+
+/*
+ * This will return "deleted" contexts, ie, where idExists is GL_FALSE.
+ * Contrast validGlxContext, which will not.  We're cheating here and
+ * using the XID as the context tag, which is fine as long as we defer
+ * actually destroying the context until it's no longer referenced, and
+ * block clients from trying to MakeCurrent on contexts that are on the
+ * way to destruction.  Notice that DoMakeCurrent calls validGlxContext
+ * for new contexts but __glXLookupContextByTag for previous contexts.
+ */
+__GLXcontext *__glXLookupContextByTag(__GLXclientState *cl, GLXContextTag tag)
+{
+    __GLXcontext *ret;
+
+    if (dixLookupResourceByType((void **)&ret, tag, __glXContextRes,
+                                cl->client, DixUseAccess) == Success)
+        return ret;
+
+    return NULL;
+}
+
+/*****************************************************************************/
+
+static void StopUsingContext(__GLXcontext *glxc)
+{
+    if (glxc) {
+	if (glxc == __glXLastContext) {
+	    /* Tell server GL library */
+	    __glXLastContext = 0;
+	}
+	glxc->isCurrent = GL_FALSE;
+	if (!glxc->idExists) {
+            FreeResourceByType(glxc->id, __glXContextRes, FALSE);
+	}
+    }
+}
+
+static void StartUsingContext(__GLXclientState *cl, __GLXcontext *glxc)
+{
+    glxc->isCurrent = GL_TRUE;
+    __glXLastContext = glxc;	
+}
+
+/**
+ * This is a helper function to handle the legacy (pre GLX 1.3) cases
+ * where passing an X window to glXMakeCurrent is valid.  Given a
+ * resource ID, look up the GLX drawable if available, otherwise, make
+ * sure it's an X window and create a GLX drawable one the fly.
+ */
+static __GLXdrawable *
+__glXGetDrawable(__GLXcontext *glxc, GLXDrawable drawId, ClientPtr client,
+		 int *error)
+{
+    DrawablePtr pDraw;
+    __GLXdrawable *pGlxDraw;
+    int rc;
+
+    if (validGlxDrawable(client, drawId, GLX_DRAWABLE_ANY,
+			 DixWriteAccess, &pGlxDraw, &rc)) {
+	if (glxc != NULL && pGlxDraw->config != glxc->config) {
+	    client->errorValue = drawId;
+	    *error = BadMatch;
+	    return NULL;
+	}
+
+	return pGlxDraw;
+    }
+
+    /* No active context and an unknown drawable, bail. */
+    if (glxc == NULL) {
+	    client->errorValue = drawId;
+	    *error = BadMatch;
+	    return NULL;
+    }
+
+    /* The drawId wasn't a GLX drawable.  Make sure it's a window and
+     * create a GLXWindow for it.  Check that the drawable screen
+     * matches the context screen and that the context fbconfig is
+     * compatible with the window visual. */
+
+    rc = dixLookupDrawable(&pDraw, drawId, client, 0, DixGetAttrAccess);
+    if (rc != Success || pDraw->type != DRAWABLE_WINDOW) {
+	client->errorValue = drawId;
+	*error = __glXError(GLXBadDrawable);
+	return NULL;
+    }
+
+    if (pDraw->pScreen != glxc->pGlxScreen->pScreen) {
+	client->errorValue = pDraw->pScreen->myNum;
+	*error = BadMatch;
+	return NULL;
+    }
+
+    if (!validGlxFBConfigForWindow(client, glxc->config, pDraw, error))
+	return NULL;
+
+    pGlxDraw = glxc->pGlxScreen->createDrawable(client, glxc->pGlxScreen,
+						pDraw, drawId,
+						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;
+    int 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;
+
+	if (!validGlxContext(client, contextId, DixUseAccess, &glxc, &error))
+	    return error;
+	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 (prevglxc->hasUnflushedCommands) {
+	    if (__glXForceCurrent(cl, tag, (int *)&error)) {
+		CALL_Flush( GET_DISPATCH(), () );
+		prevglxc->hasUnflushedCommands = GL_FALSE;
+	    } else {
+		return error;
+	    }
+	}
+
+	/*
+	** Make the previous context not current.
+	*/
+	if (!(*prevglxc->loseCurrent)(prevglxc)) {
+	    return __glXError(GLXBadContext);
+	}
+	__glXFlushContextCache();
+	if (!prevglxc->isDirect) {
+	    prevglxc->drawPriv = NULL;
+	    prevglxc->readPriv = NULL;
+	}
+    }
+	
+
+    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);
+	}
+
+	glxc->isCurrent = GL_TRUE;
+    }
+
+    StopUsingContext(prevglxc);
+
+    if (glxc) {
+	StartUsingContext(cl, glxc);
+	reply.contextTag = glxc->id;
+    } 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)
+{
+    ClientPtr client = cl->client;
+    xGLXMakeCurrentReq *req = (xGLXMakeCurrentReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXMakeCurrentReq);
+
+    return DoMakeCurrent( cl, req->drawable, req->drawable,
+			  req->context, req->oldContextTag );
+}
+
+int __glXDisp_MakeContextCurrent(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXMakeContextCurrentReq *req = (xGLXMakeContextCurrentReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXMakeContextCurrentReq);
+
+    return DoMakeCurrent( cl, req->drawable, req->readdrawable,
+			  req->context, req->oldContextTag );
+}
+
+int __glXDisp_MakeCurrentReadSGI(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXMakeCurrentReadSGIReq *req = (xGLXMakeCurrentReadSGIReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXMakeCurrentReadSGIReq);
+
+    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;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXIsDirectReq);
+
+    if (!validGlxContext(cl->client, req->context, DixReadAccess, &glxc, &err))
+	return err;
+
+    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;
+
+    REQUEST_SIZE_MATCH(xGLXQueryVersionReq);
+
+    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 = glxMajorVersion;
+    reply.minorVersion = glxMinorVersion;
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXWaitGLReq *req = (xGLXWaitGLReq *)pc;
+    GLXContextTag tag;
+    __GLXcontext *glxc = NULL;
+    int error;
+
+    REQUEST_SIZE_MATCH(xGLXWaitGLReq);
+
+    tag = req->contextTag;
+    if (tag) {
+	glxc = __glXLookupContextByTag(cl, tag);
+	if (!glxc)
+	    return __glXError(GLXBadContextTag);
+    
+	if (!__glXForceCurrent(cl, req->contextTag, &error))
+	    return error;
+
+	CALL_Finish( GET_DISPATCH(), () );
+    }
+
+    if (glxc && glxc->drawPriv->waitGL)
+	(*glxc->drawPriv->waitGL)(glxc->drawPriv);
+
+    return Success;
+}
+
+int __glXDisp_WaitX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXWaitXReq *req = (xGLXWaitXReq *)pc;
+    GLXContextTag tag;
+    __GLXcontext *glxc = NULL;
+    int error;
+
+    REQUEST_SIZE_MATCH(xGLXWaitXReq);
+
+    tag = req->contextTag;
+    if (tag) {
+	glxc = __glXLookupContextByTag(cl, tag);
+	if (!glxc)
+	    return __glXError(GLXBadContextTag);
+    
+	if (!__glXForceCurrent(cl, req->contextTag, &error))
+	    return error;
+    }
+
+    if (glxc && glxc->drawPriv->waitX)
+	(*glxc->drawPriv->waitX)(glxc->drawPriv);
+
+    return Success;
+}
+
+int __glXDisp_CopyContext(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCopyContextReq *req = (xGLXCopyContextReq *) pc;
+    GLXContextID source;
+    GLXContextID dest;
+    GLXContextTag tag;
+    unsigned long mask;
+    __GLXcontext *src, *dst;
+    int error;
+
+    REQUEST_SIZE_MATCH(xGLXCopyContextReq);
+
+    source = req->source;
+    dest = req->dest;
+    tag = req->contextTag;
+    mask = req->mask;
+    if (!validGlxContext(cl->client, source, DixReadAccess, &src, &error))
+	return error;
+    if (!validGlxContext(cl->client, dest, DixWriteAccess, &dst, &error))
+	return error;
+
+    /*
+    ** 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(), () );
+	    tagcx->hasUnflushedCommands = GL_FALSE;
+	} 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;
+}
+
+enum {
+    GLX_VIS_CONFIG_UNPAIRED = 18,
+    GLX_VIS_CONFIG_PAIRED = 20
+};
+
+enum {
+    GLX_VIS_CONFIG_TOTAL = GLX_VIS_CONFIG_UNPAIRED + GLX_VIS_CONFIG_PAIRED
+};
+
+int __glXDisp_GetVisualConfigs(__GLXclientState *cl, GLbyte *pc)
+{
+    xGLXGetVisualConfigsReq *req = (xGLXGetVisualConfigsReq *) pc;
+    ClientPtr client = cl->client;
+    xGLXGetVisualConfigsReply reply;
+    __GLXscreen *pGlxScreen;
+    __GLXconfig *modes;
+    CARD32 buf[GLX_VIS_CONFIG_TOTAL];
+    int p, i, err;
+    __GLX_DECLARE_SWAP_VARIABLES;
+    __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
+
+    REQUEST_SIZE_MATCH(xGLXGetVisualConfigsReq);
+
+    if (!validGlxScreen(cl->client, req->screen, &pGlxScreen, &err))
+	return err;
+
+    reply.numVisuals = pGlxScreen->numVisuals;
+    reply.numProps = GLX_VIS_CONFIG_TOTAL;
+    reply.length = (reply.numVisuals * __GLX_SIZE_CARD32 * GLX_VIS_CONFIG_TOTAL) >> 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->renderType & GLX_RGBA_BIT) ? GL_TRUE : GL_FALSE;
+
+	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;
+
+	assert(p == GLX_VIS_CONFIG_UNPAIRED);
+	/* 
+	** 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++] = GLX_SAMPLES_SGIS;
+	buf[p++] = modes->samples;
+	buf[p++] = GLX_SAMPLE_BUFFERS_SGIS;
+	buf[p++] = modes->sampleBuffers;
+	buf[p++] = 0; /* copy over visualSelectGroup (GLX_VISUAL_SELECT_GROUP_SGIX)? */
+	buf[p++] = 0;
+
+	assert(p == GLX_VIS_CONFIG_TOTAL);
+	if (client->swapped) {
+	    __GLX_SWAP_INT_ARRAY(buf, p);
+	}
+	WriteToClient(client, __GLX_SIZE_CARD32 * p, (char *)buf);
+    }
+    return Success;
+}
+
+#define __GLX_TOTAL_FBCONFIG_ATTRIBS (36)
+#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->renderType & GLX_RGBA_BIT) ? GL_TRUE : GL_FALSE );
+	WRITE_PAIR( GLX_RENDER_TYPE,      modes->renderType );
+	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_SAMPLES_SGIS, modes->samples );
+	WRITE_PAIR( GLX_SAMPLE_BUFFERS_SGIS, modes->sampleBuffers );
+	/* GLX_VISUAL_SELECT_GROUP_SGIX ? */
+	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)
+{
+    ClientPtr client = cl->client;
+    xGLXGetFBConfigsReq *req = (xGLXGetFBConfigsReq *) pc;
+    REQUEST_SIZE_MATCH(xGLXGetFBConfigsReq);
+    return DoGetFBConfigs(cl, req->screen);
+}
+
+int __glXDisp_GetFBConfigsSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXGetFBConfigsSGIXReq *req = (xGLXGetFBConfigsSGIXReq *) pc;
+    /* work around mesa bug, don't use REQUEST_SIZE_MATCH */
+    REQUEST_AT_LEAST_SIZE(xGLXGetFBConfigsSGIXReq);
+    return DoGetFBConfigs(cl, req->screen);
+}
+
+GLboolean
+__glXDrawableInit(__GLXdrawable *drawable,
+		  __GLXscreen *screen, DrawablePtr pDraw, int type,
+		  XID drawId, __GLXconfig *config)
+{
+    drawable->pDraw = pDraw;
+    drawable->type = type;
+    drawable->drawId = drawId;
+    drawable->config = config;
+    drawable->eventMask = 0;
+
+    return GL_TRUE;
+}
+
+void
+__glXDrawableRelease(__GLXdrawable *drawable)
+{
+}
+
+static int 
+DoCreateGLXDrawable(ClientPtr client, __GLXscreen *pGlxScreen,
+		    __GLXconfig *config, DrawablePtr pDraw, XID drawableId,
+		    XID glxDrawableId, int type)
+{
+    __GLXdrawable *pGlxDraw;
+
+    if (pGlxScreen->pScreen != pDraw->pScreen)
+	return BadMatch;
+
+    pGlxDraw = pGlxScreen->createDrawable(client, pGlxScreen, pDraw,
+					  drawableId, type,
+					  glxDrawableId, config);
+    if (pGlxDraw == NULL)
+	return BadAlloc;
+
+    if (!AddResource(glxDrawableId, __glXDrawableRes, pGlxDraw)) {
+	pGlxDraw->destroy (pGlxDraw);
+	return BadAlloc;
+    }
+
+    /*
+     * Windows aren't refcounted, so track both the X and the GLX window
+     * so we get called regardless of destruction order.
+     */
+    if (drawableId != glxDrawableId && type == GLX_DRAWABLE_WINDOW &&
+	!AddResource(pDraw->id, __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;
+
+    LEGAL_NEW_RESOURCE(glxDrawableId, client);
+
+    err = dixLookupDrawable(&pDraw, drawableId, client, 0, DixAddAccess);
+    if (err != Success) {
+	client->errorValue = drawableId;
+	return err;
+    }
+    if (pDraw->type != DRAWABLE_PIXMAP) {
+	client->errorValue = drawableId;
+	return BadPixmap;
+    }
+
+    err = DoCreateGLXDrawable(client, pGlxScreen, config, pDraw, drawableId,
+			      glxDrawableId, GLX_DRAWABLE_PIXMAP);
+
+    ((PixmapPtr)pDraw)->refcnt++;
+
+    return err;
+}
+
+static void
+determineTextureTarget(ClientPtr client, XID glxDrawableID,
+		       CARD32 *attribs, CARD32 numAttribs)
+{
+    GLenum target = 0;
+    GLenum format = 0;
+    int i, err;
+    __GLXdrawable *pGlxDraw;
+
+    if (!validGlxDrawable(client, glxDrawableID, GLX_DRAWABLE_PIXMAP,
+			  DixWriteAccess, &pGlxDraw, &err))
+	/* We just added it in CreatePixmap, so we should never get here. */
+	return;
+
+    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 (attribs[2 * i] == GLX_TEXTURE_FORMAT_EXT)
+		format = attribs[2 * i + 1];
+    }
+ 
+    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;
+    pGlxDraw->format = format;
+}
+
+int __glXDisp_CreateGLXPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateGLXPixmapReq *req = (xGLXCreateGLXPixmapReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXCreateGLXPixmapReq);
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXCreatePixmapReq *req = (xGLXCreatePixmapReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_AT_LEAST_SIZE(xGLXCreatePixmapReq);
+    if (req->numAttribs > (UINT32_MAX >> 3)) {
+	client->errorValue = req->numAttribs;
+	return BadValue;
+    }
+    REQUEST_FIXED_SIZE(xGLXCreatePixmapReq, req->numAttribs << 3);
+
+    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(cl->client, req->glxpixmap,
+			   (CARD32*) (req + 1), req->numAttribs);
+
+    return Success;
+}
+
+int __glXDisp_CreateGLXPixmapWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateGLXPixmapWithConfigSGIXReq *req = 
+	(xGLXCreateGLXPixmapWithConfigSGIXReq *) pc;
+    __GLXconfig *config;
+    __GLXscreen *pGlxScreen;
+    int err;
+
+    REQUEST_SIZE_MATCH(xGLXCreateGLXPixmapWithConfigSGIXReq);
+
+    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)
+{
+    __GLXdrawable *pGlxDraw;
+    int err;
+
+    if (!validGlxDrawable(cl->client, glxdrawable, type,
+			  DixDestroyAccess, &pGlxDraw, &err))
+	return err;
+
+    FreeResource(glxdrawable, FALSE);
+
+    return Success;
+}
+
+int __glXDisp_DestroyGLXPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyGLXPixmapReq *req = (xGLXDestroyGLXPixmapReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXDestroyGLXPixmapReq);
+
+    return DoDestroyDrawable(cl, req->glxpixmap, GLX_DRAWABLE_PIXMAP);
+}
+
+int __glXDisp_DestroyPixmap(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyPixmapReq *req = (xGLXDestroyPixmapReq *) pc;
+
+    /* should be REQUEST_SIZE_MATCH, but mesa's glXDestroyPixmap used to set
+     * length to 3 instead of 2 */
+    REQUEST_AT_LEAST_SIZE(xGLXDestroyPixmapReq);
+
+    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;
+
+    LEGAL_NEW_RESOURCE(glxDrawableId, client);
+
+    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);
+
+    /* Assign the pixmap the same id as the pbuffer and add it as a
+     * resource so it and the DRI2 drawable will be reclaimed when the
+     * pbuffer is destroyed. */
+    pPixmap->drawable.id = glxDrawableId;
+    if (!AddResource(pPixmap->drawable.id, RT_PIXMAP, pPixmap))
+	return BadAlloc;
+
+    return DoCreateGLXDrawable(client, pGlxScreen, config, &pPixmap->drawable,
+			       glxDrawableId, glxDrawableId,
+			       GLX_DRAWABLE_PBUFFER);
+}
+
+int __glXDisp_CreatePbuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXCreatePbufferReq	*req = (xGLXCreatePbufferReq *) pc;
+    CARD32			*attrs;
+    int				 width, height, i;
+
+    REQUEST_AT_LEAST_SIZE(xGLXCreatePbufferReq);
+    if (req->numAttribs > (UINT32_MAX >> 3)) {
+	client->errorValue = req->numAttribs;
+	return BadValue;
+    }
+    REQUEST_FIXED_SIZE(xGLXCreatePbufferReq, req->numAttribs << 3);
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXCreateGLXPbufferSGIXReq *req = (xGLXCreateGLXPbufferSGIXReq *) pc;
+
+    REQUEST_AT_LEAST_SIZE(xGLXCreateGLXPbufferSGIXReq);
+
+    return DoCreatePbuffer(cl->client, req->screen, req->fbconfig,
+			   req->width, req->height, req->pbuffer);
+}
+
+int __glXDisp_DestroyPbuffer(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyPbufferReq *req = (xGLXDestroyPbufferReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXDestroyPbufferReq);
+
+    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);
+}
+
+int __glXDisp_DestroyGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyGLXPbufferSGIXReq *req = (xGLXDestroyGLXPbufferSGIXReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXDestroyGLXPbufferSGIXReq);
+
+    return DoDestroyDrawable(cl, req->pbuffer, GLX_DRAWABLE_PBUFFER);
+}
+
+static int
+DoChangeDrawableAttributes(ClientPtr client, XID glxdrawable,
+			   int numAttribs, CARD32 *attribs)
+{
+    __GLXdrawable *pGlxDraw;
+    int i, err;
+
+    if (!validGlxDrawable(client, glxdrawable, GLX_DRAWABLE_ANY,
+			  DixSetAttrAccess, &pGlxDraw, &err))
+	return err;
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXChangeDrawableAttributesReq *req =
+	(xGLXChangeDrawableAttributesReq *) pc;
+
+    REQUEST_AT_LEAST_SIZE(xGLXChangeDrawableAttributesReq);
+    if (req->numAttribs > (UINT32_MAX >> 3)) {
+	client->errorValue = req->numAttribs;
+	return BadValue;
+    }
+#if 0
+    /* mesa sends an additional 8 bytes */
+    REQUEST_FIXED_SIZE(xGLXChangeDrawableAttributesReq, req->numAttribs << 3);
+#else
+    if (((sizeof(xGLXChangeDrawableAttributesReq) + (req->numAttribs << 3)) >> 2) < client->req_len)
+	    return BadLength;
+#endif
+
+    return DoChangeDrawableAttributes(cl->client, req->drawable,
+				      req->numAttribs, (CARD32 *) (req + 1));
+}
+
+int __glXDisp_ChangeDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXChangeDrawableAttributesSGIXReq *req =
+	(xGLXChangeDrawableAttributesSGIXReq *)pc;
+
+    REQUEST_AT_LEAST_SIZE(xGLXChangeDrawableAttributesSGIXReq);
+    if (req->numAttribs > (UINT32_MAX >> 3)) {
+	client->errorValue = req->numAttribs;
+	return BadValue;
+    }
+    REQUEST_FIXED_SIZE(xGLXChangeDrawableAttributesSGIXReq, req->numAttribs << 3);
+
+    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;
+
+    REQUEST_AT_LEAST_SIZE(xGLXCreateWindowReq);
+    if (req->numAttribs > (UINT32_MAX >> 3)) {
+	client->errorValue = req->numAttribs;
+	return BadValue;
+    }
+    REQUEST_FIXED_SIZE(xGLXCreateWindowReq, req->numAttribs << 3);
+
+    LEGAL_NEW_RESOURCE(req->glxwindow, client);
+
+    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->window,
+			       req->glxwindow, GLX_DRAWABLE_WINDOW);
+}
+
+int __glXDisp_DestroyWindow(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXDestroyWindowReq *req = (xGLXDestroyWindowReq *) pc;
+
+    /* mesa's glXDestroyWindow used to set length to 3 instead of 2 */
+    REQUEST_AT_LEAST_SIZE(xGLXDestroyWindowReq);
+
+    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;
+    XID drawId;
+    __GLXcontext *glxc = NULL;
+    __GLXdrawable *pGlxDraw;
+    int error;
+
+    REQUEST_SIZE_MATCH(xGLXSwapBuffersReq);
+
+    tag = req->contextTag;
+    drawId = req->drawable;
+    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(), () );
+	    glxc->hasUnflushedCommands = GL_FALSE;
+	} else {
+	    return error;
+	}
+    }
+
+    pGlxDraw = __glXGetDrawable(glxc, drawId, client, &error);
+    if (pGlxDraw == NULL)
+	return error;
+
+    if (pGlxDraw->type == DRAWABLE_WINDOW &&
+	(*pGlxDraw->swapBuffers)(cl->client, 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;
+    int err;
+
+    if (!validGlxContext(cl->client, gcId, DixReadAccess, &ctx, &err))
+	return err;
+
+    nProps = 3;
+    reply.length = nProps << 1;
+    reply.type = X_Reply;
+    reply.sequenceNumber = client->sequence;
+    reply.n = nProps;
+
+    nReplyBytes = reply.length << 2;
+    sendBuf = (int *)malloc((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);
+    }
+    free((char *)sendBuf);
+
+    return Success;
+}
+
+int __glXDisp_QueryContextInfoEXT(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryContextInfoEXTReq *req = (xGLXQueryContextInfoEXTReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXQueryContextInfoEXTReq);
+
+    return DoQueryContext(cl, req->context);
+}
+
+int __glXDisp_QueryContext(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXQueryContextReq *req = (xGLXQueryContextReq *) pc;
+
+    REQUEST_SIZE_MATCH(xGLXQueryContextReq);
+
+    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;
+    CARD32		 num_attribs;
+
+    if ((sizeof(xGLXVendorPrivateReq) + 12) >> 2 > client->req_len)
+	return BadLength;
+
+    pc += __GLX_VENDPRIV_HDR_SIZE;
+
+    drawId = *((CARD32 *) (pc));
+    buffer = *((INT32 *)  (pc + 4));
+    num_attribs = *((CARD32 *) (pc + 8));
+    if (num_attribs > (UINT32_MAX >> 3)) {
+	client->errorValue = num_attribs;
+	return BadValue;
+    }
+    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 12 + (num_attribs << 3));
+
+    if (buffer != GLX_FRONT_LEFT_EXT)
+	return __glXError(GLXBadPixmap);
+
+    context = __glXForceCurrent (cl, req->contextTag, &error);
+    if (!context)
+	return error;
+
+    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_PIXMAP,
+			  DixReadAccess, &pGlxDraw, &error))
+	return error;
+
+    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;
+
+    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 8);
+
+    pc += __GLX_VENDPRIV_HDR_SIZE;
+
+    drawId = *((CARD32 *) (pc));
+    buffer = *((INT32 *)  (pc + 4));
+    
+    context = __glXForceCurrent (cl, req->contextTag, &error);
+    if (!context)
+	return error;
+
+    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_PIXMAP,
+			  DixReadAccess, &pGlxDraw, &error))
+	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;
+
+    REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 20);
+
+    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(), () );
+	    glxc->hasUnflushedCommands = GL_FALSE;
+	} 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;
+
+    if (!validGlxDrawable(client, drawId, GLX_DRAWABLE_ANY,
+			  DixGetAttrAccess, &pGlxDraw, &error))
+	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)
+{
+    ClientPtr client = cl->client;
+    xGLXGetDrawableAttributesReq *req = (xGLXGetDrawableAttributesReq *)pc;
+
+    /* this should be REQUEST_SIZE_MATCH, but mesa sends an additional 4 bytes */
+    REQUEST_AT_LEAST_SIZE(xGLXGetDrawableAttributesReq);
+
+    return DoGetDrawableAttributes(cl, req->drawable);
+}
+
+int __glXDisp_GetDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXGetDrawableAttributesSGIXReq *req =
+	(xGLXGetDrawableAttributesSGIXReq *)pc;
+    
+    REQUEST_SIZE_MATCH(xGLXGetDrawableAttributesSGIXReq);
+
+    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;
+
+    REQUEST_AT_LEAST_SIZE(xGLXRenderReq);
+
+    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;
+
+	if (left < sizeof(__GLXrenderHeader))
+	    return BadLength;
+
+	/*
+	** 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++;
+    }
+    glxc->hasUnflushedCommands = GL_TRUE;
+    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 *) malloc(cmdlen);
+	    } else {
+		cl->largeCmdBuf = (GLbyte *) realloc(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);
+	    glxc->hasUnflushedCommands = GL_TRUE;
+
+	    /*
+	    ** Reset for the next RenderLarge series.
+	    */
+	    __glXResetLargeCommandStatus(cl);
+	} else {
+	    /*
+	    ** This is neither the first nor the last request.
+	    */
+	}
+	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)
+{
+    ClientPtr client = cl->client;
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    GLint vendorcode = req->vendorCode;
+    __GLXdispatchVendorPrivProcPtr proc;
+
+    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateReq);
+
+    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)
+{
+    ClientPtr client = cl->client;
+    xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
+    GLint vendorcode = req->vendorCode;
+    __GLXdispatchVendorPrivProcPtr proc;
+
+    REQUEST_AT_LEAST_SIZE(xGLXVendorPrivateReq);
+
+    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;
+
+    REQUEST_SIZE_MATCH(xGLXQueryExtensionsStringReq);
+
+    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 *) malloc(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);
+    }
+
+    free(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;
+    char ver_str[16];
+
+    REQUEST_SIZE_MATCH(xGLXQueryServerStringReq);
+
+    if (!validGlxScreen(client, req->screen, &pGlxScreen, &err))
+	return err;
+
+    switch(req->name) {
+	case GLX_VENDOR:
+	    ptr = pGlxScreen->GLXvendor;
+	    break;
+	case GLX_VERSION:
+	    /* Return to the server version rather than the screen version
+	     * to prevent confusion when they do not match.
+	     */
+	    snprintf(ver_str, 16, "%d.%d", glxMajorVersion, glxMinorVersion);
+	    ptr = ver_str;
+	    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 *) malloc(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);
+    }
+
+    free(buf);
+    return Success;
+}
+
+int __glXDisp_ClientInfo(__GLXclientState *cl, GLbyte *pc)
+{
+    ClientPtr client = cl->client;
+    xGLXClientInfoReq *req = (xGLXClientInfoReq *) pc;
+    const char *buf;
+   
+    REQUEST_AT_LEAST_SIZE(xGLXClientInfoReq);
+
+    buf = (const char *)(req+1);
+    if (!memchr(buf, 0, (client->req_len << 2) - sizeof(xGLXClientInfoReq)))
+	return BadLength;
+
+    cl->GLClientmajorVersion = req->major;
+    cl->GLClientminorVersion = req->minor;
+    free(cl->GLClientextensions);
+    cl->GLClientextensions = strdup(buf);
+
+    return Success;
+}