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diff --git a/GL/glx/single2swap.c b/GL/glx/single2swap.c
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+/* $XFree86: xc/programs/Xserver/GL/glx/single2swap.c,v 1.7 2002/01/14 22:47:08 tsi Exp $ */
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#define NEED_REPLIES
+#include "glxserver.h"
+#include "glxutil.h"
+#include "glxext.h"
+#include "unpack.h"
+#include "g_disptab.h"
+#include "GL/glx_ansic.h"
+
+int __glXDispSwap_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
+{
+ GLsizei size;
+ GLenum type;
+ __GLX_DECLARE_SWAP_VARIABLES;
+ __GLXcontext *cx;
+ int error;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ pc += __GLX_SINGLE_HDR_SIZE;
+ __GLX_SWAP_INT(pc+0);
+ __GLX_SWAP_INT(pc+4);
+ size = *(GLsizei *)(pc+0);
+ type = *(GLenum *)(pc+4);
+ if (cx->feedbackBufSize < size) {
+ cx->feedbackBuf = (GLfloat *) __glXRealloc(cx->feedbackBuf,
+ (size_t) size
+ * __GLX_SIZE_FLOAT32);
+ if (!cx->feedbackBuf) {
+ cl->client->errorValue = size;
+ return BadAlloc;
+ }
+ cx->feedbackBufSize = size;
+ }
+ glFeedbackBuffer(size, type, cx->feedbackBuf);
+ __GLX_NOTE_UNFLUSHED_CMDS(cx);
+ return Success;
+}
+
+int __glXDispSwap_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
+{
+ __GLXcontext *cx;
+ GLsizei size;
+ __GLX_DECLARE_SWAP_VARIABLES;
+ int error;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ pc += __GLX_SINGLE_HDR_SIZE;
+ __GLX_SWAP_INT(pc+0);
+ size = *(GLsizei *)(pc+0);
+ if (cx->selectBufSize < size) {
+ cx->selectBuf = (GLuint *) __glXRealloc(cx->selectBuf,
+ (size_t) size
+ * __GLX_SIZE_CARD32);
+ if (!cx->selectBuf) {
+ cl->client->errorValue = size;
+ return BadAlloc;
+ }
+ cx->selectBufSize = size;
+ }
+ glSelectBuffer(size, cx->selectBuf);
+ __GLX_NOTE_UNFLUSHED_CMDS(cx);
+ return Success;
+}
+
+int __glXDispSwap_RenderMode(__GLXclientState *cl, GLbyte *pc)
+{
+ ClientPtr client;
+ __GLXcontext *cx;
+ xGLXRenderModeReply reply;
+ GLint nitems=0, retBytes=0, retval, newModeCheck;
+ GLubyte *retBuffer = NULL;
+ GLenum newMode;
+ __GLX_DECLARE_SWAP_VARIABLES;
+ __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
+ int error;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ pc += __GLX_SINGLE_HDR_SIZE;
+ __GLX_SWAP_INT(pc);
+ newMode = *(GLenum*) pc;
+ retval = glRenderMode(newMode);
+
+ /* Check that render mode worked */
+ glGetIntegerv(GL_RENDER_MODE, &newModeCheck);
+ if (newModeCheck != newMode) {
+ /* Render mode change failed. Bail */
+ newMode = newModeCheck;
+ goto noChangeAllowed;
+ }
+
+ /*
+ ** Render mode might have still failed if we get here. But in this
+ ** case we can't really tell, nor does it matter. If it did fail, it
+ ** will return 0, and thus we won't send any data across the wire.
+ */
+
+ switch (cx->renderMode) {
+ case GL_RENDER:
+ cx->renderMode = newMode;
+ break;
+ case GL_FEEDBACK:
+ if (retval < 0) {
+ /* Overflow happened. Copy the entire buffer */
+ nitems = cx->feedbackBufSize;
+ } else {
+ nitems = retval;
+ }
+ retBytes = nitems * __GLX_SIZE_FLOAT32;
+ retBuffer = (GLubyte*) cx->feedbackBuf;
+ __GLX_SWAP_FLOAT_ARRAY((GLbyte *)retBuffer, nitems);
+ cx->renderMode = newMode;
+ break;
+ case GL_SELECT:
+ if (retval < 0) {
+ /* Overflow happened. Copy the entire buffer */
+ nitems = cx->selectBufSize;
+ } else {
+ GLuint *bp = cx->selectBuf;
+ GLint i;
+
+ /*
+ ** Figure out how many bytes of data need to be sent. Parse
+ ** the selection buffer to determine this fact as the
+ ** return value is the number of hits, not the number of
+ ** items in the buffer.
+ */
+ nitems = 0;
+ i = retval;
+ while (--i >= 0) {
+ GLuint n;
+
+ /* Parse select data for this hit */
+ n = *bp;
+ bp += 3 + n;
+ }
+ nitems = bp - cx->selectBuf;
+ }
+ retBytes = nitems * __GLX_SIZE_CARD32;
+ retBuffer = (GLubyte*) cx->selectBuf;
+ __GLX_SWAP_INT_ARRAY((GLbyte *)retBuffer, nitems);
+ cx->renderMode = newMode;
+ break;
+ }
+
+ /*
+ ** First reply is the number of elements returned in the feedback or
+ ** selection array, as per the API for glRenderMode itself.
+ */
+ noChangeAllowed:;
+ client = cl->client;
+ reply.length = nitems;
+ reply.type = X_Reply;
+ reply.sequenceNumber = client->sequence;
+ reply.retval = retval;
+ reply.size = nitems;
+ reply.newMode = newMode;
+ __GLX_SWAP_SHORT(&reply.sequenceNumber);
+ __GLX_SWAP_INT(&reply.length);
+ __GLX_SWAP_INT(&reply.retval);
+ __GLX_SWAP_INT(&reply.size);
+ __GLX_SWAP_INT(&reply.newMode);
+ WriteToClient(client, sz_xGLXRenderModeReply, (char *)&reply);
+ if (retBytes) {
+ WriteToClient(client, retBytes, (char *)retBuffer);
+ }
+ return Success;
+}
+
+int __glXDispSwap_Flush(__GLXclientState *cl, GLbyte *pc)
+{
+ __GLXcontext *cx;
+ int error;
+ __GLX_DECLARE_SWAP_VARIABLES;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ glFlush();
+ __GLX_NOTE_FLUSHED_CMDS(cx);
+ return Success;
+}
+
+int __glXDispSwap_Finish(__GLXclientState *cl, GLbyte *pc)
+{
+ __GLXcontext *cx;
+ ClientPtr client;
+ int error;
+ __GLX_DECLARE_SWAP_VARIABLES;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ /* Do a local glFinish */
+ glFinish();
+ __GLX_NOTE_FLUSHED_CMDS(cx);
+
+ /* Send empty reply packet to indicate finish is finished */
+ client = cl->client;
+ __GLX_BEGIN_REPLY(0);
+ __GLX_PUT_RETVAL(0);
+ __GLX_SWAP_REPLY_HEADER();
+ __GLX_SEND_HEADER();
+
+ return Success;
+}
+
+int __glXDispSwap_GetString(__GLXclientState *cl, GLbyte *pc)
+{
+ ClientPtr client;
+ __GLXcontext *cx;
+ GLenum name;
+ const char *string;
+ __GLX_DECLARE_SWAP_VARIABLES;
+ int error;
+ char *buf = NULL, *buf1 = NULL;
+ GLint length = 0;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+
+ pc += __GLX_SINGLE_HDR_SIZE;
+ __GLX_SWAP_INT(pc + 0);
+ name = *(GLenum *)(pc + 0);
+ string = (const char *)glGetString(name);
+ client = cl->client;
+
+ /*
+ ** Restrict extensions to those that are supported by both the
+ ** implementation and the connection. That is, return the
+ ** intersection of client, server, and core extension strings.
+ */
+ if (name == GL_EXTENSIONS) {
+ buf1 = __glXcombine_strings(string,
+ cl->GLClientextensions);
+ buf = __glXcombine_strings(buf1,
+ cx->pGlxScreen->GLextensions);
+ if (buf1 != NULL) {
+ __glXFree(buf1);
+ }
+ string = buf;
+ }
+ if (string) {
+ length = __glXStrlen((const char *) string) + 1;
+ }
+
+ __GLX_BEGIN_REPLY(length);
+ __GLX_PUT_SIZE(length);
+
+ __GLX_SWAP_REPLY_SIZE();
+ __GLX_SWAP_REPLY_HEADER();
+ __GLX_SEND_HEADER();
+ WriteToClient(client, length, (char *) string);
+ if (buf != NULL) {
+ __glXFree(buf);
+ }
+
+ return Success;
+}
+
+int __glXDispSwap_GetClipPlane(__GLXclientState *cl, GLbyte *pc)
+{
+ __GLXcontext *cx;
+ ClientPtr client = cl->client;
+ int error;
+ GLdouble answer[4];
+ __GLX_DECLARE_SWAP_VARIABLES;
+ __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
+
+ __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
+ cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
+ if (!cx) {
+ return error;
+ }
+ pc += __GLX_SINGLE_HDR_SIZE;
+ __GLX_SWAP_INT(pc + 0);
+
+ __glXClearErrorOccured();
+ glGetClipPlane(*(GLenum *)(pc + 0), answer);
+ if (__glXErrorOccured()) {
+ __GLX_BEGIN_REPLY(0);
+ __GLX_SWAP_REPLY_HEADER();
+ __GLX_SEND_HEADER();
+ } else {
+ __GLX_SWAP_DOUBLE_ARRAY((GLbyte *)answer, 4);
+ __GLX_BEGIN_REPLY(32);
+ __GLX_SWAP_REPLY_HEADER();
+ __GLX_SEND_HEADER();
+ __GLX_SEND_DOUBLE_ARRAY(4);
+ }
+ return Success;
+}
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