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xserver-multidpi/GL/glx/glxcmds.c
Kaleb Keithley 4ee0a53de8 Import most of XFree86 4.4RC3. This import excludes files which have the 
new license. If we want to, later we can import 4.4RC3 again and pick
    up the files that have the new license, but for now the vendor branch
    is "pure."
2004-02-23 20:35:22 +00:00

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/* $XFree86: xc/programs/Xserver/GL/glx/glxcmds.c,v 1.13 2004/02/12 02:25:01 torrey 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
#define FONT_PCF
#include "glxserver.h"
#include <GL/glxtokens.h>
#include <unpack.h>
#include "g_disptab.h"
#include <pixmapstr.h>
#include <windowstr.h>
#include "g_disptab_EXT.h"
#include "glximports.h"
#include "glxutil.h"
#include "glxext.h"
#include "GL/glx_ansic.h"
/************************************************************************/
static __GLimports imports = {
__glXImpMalloc,
__glXImpCalloc,
__glXImpRealloc,
__glXImpFree,
__glXImpWarning,
__glXImpFatal,
__glXImpGetenv,
__glXImpAtoi,
__glXImpSprintf,
__glXImpFopen,
__glXImpFclose,
__glXImpFprintf,
__glXImpGetDrawablePrivate,
__glXImpGetReadablePrivate,
NULL
};
static int DoMakeCurrent( __GLXclientState *cl, GLXDrawable drawId,
GLXDrawable readId, GLXContextID contextId, GLXContextTag tag );
/************************************************************************/
/*
** Create a GL context with the given properties.
*/
int __glXCreateContext(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXCreateContextReq *req = (xGLXCreateContextReq *) pc;
VisualPtr pVisual;
ScreenPtr pScreen;
__GLXcontext *glxc, *shareglxc;
__GLXvisualConfig *pGlxVisual;
__GLXscreenInfo *pGlxScreen;
__GLinterface *shareGC;
GLXContextID gcId = req->context;
GLXContextID shareList = req->shareList;
VisualID visual = req->visual;
GLuint screen = req->screen;
GLboolean isDirect = req->isDirect;
GLint i;
/*
** Check if screen exists.
*/
if (screen >= screenInfo.numScreens) {
client->errorValue = screen;
return BadValue;
}
pScreen = screenInfo.screens[screen];
pGlxScreen = &__glXActiveScreens[screen];
/*
** Check if the visual ID is valid for this screen.
*/
pVisual = pScreen->visuals;
for (i = 0; i < pScreen->numVisuals; i++, pVisual++) {
if (pVisual->vid == visual) {
break;
}
}
if (i == pScreen->numVisuals) {
client->errorValue = visual;
return BadValue;
}
/*
** Get configuration of the visual. This assumes that the
** glXActiveScreens structure contains visual configurations only for the
** subset of Visuals that are supported by this implementation of the
** OpenGL.
*/
pGlxVisual = pGlxScreen->pGlxVisual;
for (i = 0; i < pGlxScreen->numVisuals; i++, pGlxVisual++) {
if (pGlxVisual->vid == visual) {
break;
}
}
if (i == pGlxScreen->numVisuals) {
/*
** Visual not support on this screen by this OpenGL implementation.
*/
client->errorValue = visual;
return BadValue;
}
/*
** 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) {
shareGC = 0;
} else {
shareglxc = (__GLXcontext *) LookupIDByType(shareList, __glXContextRes);
if (!shareglxc) {
client->errorValue = shareList;
return __glXBadContext;
}
if (shareglxc->isDirect) {
/*
** NOTE: no support for sharing display lists between direct
** contexts, even if they are in the same address space.
*/
#if 0
/* Disabling this code seems to allow shared display lists
* and texture objects to work. We'll leave it disabled for now.
*/
client->errorValue = shareList;
return BadMatch;
#endif
} else {
/*
** Create an indirect context regardless of what the client asked
** for; this way we can share display list space with shareList.
*/
isDirect = GL_FALSE;
}
shareGC = shareglxc->gc;
}
/*
** Allocate memory for the new context
*/
glxc = (__GLXcontext *) __glXMalloc(sizeof(__GLXcontext));
if (!glxc) {
return BadAlloc;
}
__glXMemset(glxc, 0, sizeof(__GLXcontext));
/*
** Initially, setup the part of the context that could be used by
** a GL core that needs windowing information (e.g., Mesa).
*/
glxc->pScreen = pScreen;
glxc->pGlxScreen = pGlxScreen;
glxc->pVisual = pVisual;
glxc->pGlxVisual = pGlxVisual;
if (!isDirect) {
__GLcontextModes *modes;
/*
** first build __GLcontextModes from __GLXvisualConfig
*/
modes = (__GLcontextModes *) __glXMalloc(sizeof(__GLcontextModes));
glxc->modes = modes;
__glXFormatGLModes(modes, pGlxVisual);
/*
** Allocate a GL context
*/
imports.other = (void *)glxc;
glxc->gc = (*pGlxScreen->createContext)(&imports, modes, shareGC);
if (!glxc->gc) {
__glXFree(glxc);
client->errorValue = gcId;
return BadAlloc;
}
} else {
/*
** Don't need local GL context for a direct context.
*/
glxc->gc = 0;
}
/*
** Register this context as a resource.
*/
if (!AddResource(gcId, __glXContextRes, (pointer)glxc)) {
if (!isDirect) {
(*glxc->gc->exports.destroyContext)((__GLcontext *)glxc->gc);
}
__glXFree(glxc);
client->errorValue = gcId;
return BadAlloc;
}
/*
** Finally, now that everything is working, setup the rest of the
** context.
*/
glxc->id = gcId;
glxc->share_id = shareList;
glxc->idExists = GL_TRUE;
glxc->isCurrent = GL_FALSE;
glxc->isDirect = isDirect;
glxc->renderMode = GL_RENDER;
return Success;
}
/*
** Destroy a GL context as an X resource.
*/
int __glXDestroyContext(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXDestroyContextReq *req = (xGLXDestroyContextReq *) pc;
GLXContextID gcId = req->context;
__GLXcontext *glxc;
glxc = (__GLXcontext *) LookupIDByType(gcId, __glXContextRes);
if (glxc) {
/*
** Just free the resource; don't actually destroy the context,
** because it might be in use. The
** destroy method will be called by the resource destruction routine
** if necessary.
*/
FreeResourceByType(gcId, __glXContextRes, FALSE);
return Success;
} else {
client->errorValue = gcId;
return __glXBadContext;
}
}
/*****************************************************************************/
/*
** For each client, the server keeps a table of all the contexts that are
** current for that client (each thread of a client may have its own current
** context). These routines add, change, and lookup contexts in the table.
*/
/*
** Add a current context, and return the tag that will be used to refer to it.
*/
static int AddCurrentContext(__GLXclientState *cl, __GLXcontext *glxc)
{
int i;
int num = cl->numCurrentContexts;
__GLXcontext **table = cl->currentContexts;
if (!glxc) return -1;
/*
** Try to find an empty slot and use it.
*/
for (i=0; i < num; i++) {
if (!table[i]) {
table[i] = glxc;
return i+1;
}
}
/*
** Didn't find a free slot, so we'll have to grow the table.
*/
if (!num) {
table = (__GLXcontext **) __glXMalloc(sizeof(__GLXcontext *));
} else {
table = (__GLXcontext **) __glXRealloc(table,
(num+1)*sizeof(__GLXcontext *));
}
table[num] = glxc;
cl->currentContexts = table;
cl->numCurrentContexts++;
return num+1;
}
/*
** Given a tag, change the current context for the corresponding entry.
*/
static void ChangeCurrentContext(__GLXclientState *cl, __GLXcontext *glxc,
GLXContextTag tag)
{
__GLXcontext **table = cl->currentContexts;
table[tag-1] = glxc;
}
/*
** For this implementation we have chosen to simply use the index of the
** context's entry in the table as the context tag. A tag must be greater
** than 0.
*/
__GLXcontext *__glXLookupContextByTag(__GLXclientState *cl, GLXContextTag tag)
{
int num = cl->numCurrentContexts;
if (tag < 1 || tag > num) {
return 0;
} else {
return cl->currentContexts[tag-1];
}
}
/*****************************************************************************/
static void StopUsingContext(__GLXcontext *glxc)
{
if (glxc) {
if (glxc == __glXLastContext) {
/* Tell server GL library */
__glXLastContext = 0;
}
glxc->isCurrent = GL_FALSE;
if (!glxc->idExists) {
__glXFreeContext(glxc);
}
}
}
static void StartUsingContext(__GLXclientState *cl, __GLXcontext *glxc)
{
glxc->isCurrent = GL_TRUE;
}
/*****************************************************************************/
/*
** Make an OpenGL context and drawable current.
*/
int __glXMakeCurrent(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeCurrentReq *req = (xGLXMakeCurrentReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->drawable,
req->context, req->oldContextTag );
}
int __glXMakeContextCurrent(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeContextCurrentReq *req = (xGLXMakeContextCurrentReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->readdrawable,
req->context, req->oldContextTag );
}
int __glXMakeCurrentReadSGI(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeCurrentReadSGIReq *req = (xGLXMakeCurrentReadSGIReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->readable,
req->context, req->oldContextTag );
}
/**
* Given a drawable ID, get the associated drawable and / or pixmap.
*
* If the specified drawable ID is not a pixmap, \c ppPixmap will be set
* to \c NULL on return. In either case, \c ppDraw will be set to a drawable.
* In the case where the drawable ID is a pixmap, \c ppDraw will be set to
* the drawable associated with that pixmap.
*
* \param glxc Associated GLX context.
* \param drawId ID of the drawable.
* \param ppDraw Location to store the pointer to the drawable.
* \param ppPixmap Location to store the pointer to the pixmap.
* \param client Pointer to the client state.
* \return Zero is returned on success. Otherwise a GLX / X11 protocol error
* is returned.
*
* \notes This function will need some modification when support pbuffers
* is added.
*/
static int GetDrawableOrPixmap( __GLXcontext *glxc, GLXDrawable drawId,
DrawablePtr *ppDraw, __GLXpixmap **ppPixmap,
ClientPtr client )
{
DrawablePtr pDraw;
__GLXpixmap *drawPixmap = NULL;
pDraw = (DrawablePtr) LookupDrawable(drawId, client);
if (pDraw) {
if (pDraw->type == DRAWABLE_WINDOW) {
/*
** Drawable is an X Window.
*/
WindowPtr pWin = (WindowPtr)pDraw;
VisualID vid = wVisual(pWin);
/*
** Check if window and context are similar.
*/
if ((vid != glxc->pVisual->vid) ||
(pWin->drawable.pScreen != glxc->pScreen)) {
client->errorValue = drawId;
return BadMatch;
}
} else {
/*
** An X Pixmap is not allowed as a parameter (a GLX Pixmap
** is, but it must first be created with glxCreateGLXPixmap).
*/
client->errorValue = drawId;
return __glXBadDrawable;
}
} else {
drawPixmap = (__GLXpixmap *) LookupIDByType(drawId, __glXPixmapRes);
if (drawPixmap) {
/*
** Check if pixmap and context are similar.
*/
if (drawPixmap->pScreen != glxc->pScreen ||
drawPixmap->pGlxVisual != glxc->pGlxVisual) {
client->errorValue = drawId;
return BadMatch;
}
pDraw = drawPixmap->pDraw;
} else {
/*
** Drawable is neither a Window nor a GLXPixmap.
*/
client->errorValue = drawId;
return __glXBadDrawable;
}
}
*ppPixmap = drawPixmap;
*ppDraw = pDraw;
return 0;
}
static int DoMakeCurrent( __GLXclientState *cl,
GLXDrawable drawId, GLXDrawable readId,
GLXContextID contextId, GLXContextTag tag )
{
ClientPtr client = cl->client;
DrawablePtr pDraw;
DrawablePtr pRead;
xGLXMakeCurrentReply reply;
__GLXpixmap *drawPixmap = NULL;
__GLXpixmap *readPixmap = NULL;
__GLXcontext *glxc, *prevglxc;
__GLinterface *gc, *prevgc;
__GLXdrawablePrivate *drawPriv = NULL;
__GLXdrawablePrivate *readPriv = NULL;
GLint error;
GLuint mask;
/*
** If one is None and the other isn't, it's a bad match.
*/
mask = (drawId == None) ? (1 << 0) : 0;
mask |= (readId == None) ? (1 << 1) : 0;
mask |= (contextId == None) ? (1 << 2) : 0;
if ( (mask != 0x00) && (mask != 0x07) ) {
return BadMatch;
}
/*
** Lookup old context. If we have one, it must be in a usable state.
*/
if (tag != 0) {
prevglxc = __glXLookupContextByTag(cl, tag);
if (!prevglxc) {
/*
** Tag for previous context is invalid.
*/
return __glXBadContextTag;
}
if (prevglxc->renderMode != GL_RENDER) {
/* Oops. Not in render mode render. */
client->errorValue = prevglxc->id;
return __glXBadContextState;
}
prevgc = prevglxc->gc;
} else {
prevglxc = 0;
prevgc = 0;
}
/*
** Lookup new context. It must not be current for someone else.
*/
if (contextId != None) {
int status;
glxc = (__GLXcontext *) LookupIDByType(contextId, __glXContextRes);
if (!glxc) {
client->errorValue = contextId;
return __glXBadContext;
}
if ((glxc != prevglxc) && glxc->isCurrent) {
/* Context is current to somebody else */
return BadAccess;
}
gc = glxc->gc;
assert( drawId != None );
assert( readId != None );
status = GetDrawableOrPixmap( glxc, drawId, & pDraw, & drawPixmap,
client );
if ( status != 0 ) {
return status;
}
if ( readId != drawId ) {
status = GetDrawableOrPixmap( glxc, readId, & pRead, & readPixmap,
client );
if ( status != 0 ) {
return status;
}
} else {
pRead = pDraw;
}
/* FIXME: Finish refactoring this. - idr */
/* get the drawable private */
if (pDraw) {
drawPriv = __glXGetDrawablePrivate(pDraw, drawId, glxc->modes);
if (drawPriv == NULL) {
return __glXBadDrawable;
}
}
if (pRead != pDraw) {
readPriv = __glXGetDrawablePrivate(pRead, readId, glxc->modes);
if (readPriv == NULL) {
return __glXBadDrawable;
}
} else {
readPriv = drawPriv;
}
} else {
/* Switching to no context. Ignore new drawable. */
glxc = 0;
gc = 0;
pDraw = 0;
pRead = 0;
}
if (prevglxc) {
/*
** Flush the previous context if needed.
*/
if (__GLX_HAS_UNFLUSHED_CMDS(prevglxc)) {
if (__glXForceCurrent(cl, tag, (int *)&error)) {
glFlush();
__GLX_NOTE_FLUSHED_CMDS(prevglxc);
} else {
return error;
}
}
/*
** Make the previous context not current.
*/
if (!(*prevgc->exports.loseCurrent)((__GLcontext *)prevgc)) {
return __glXBadContext;
}
__glXDeassociateContext(prevglxc);
}
if ((glxc != 0) && !glxc->isDirect) {
glxc->drawPriv = drawPriv;
glxc->readPriv = readPriv;
__glXCacheDrawableSize(drawPriv);
/* make the context current */
if (!(*gc->exports.makeCurrent)((__GLcontext *)gc)) {
glxc->drawPriv = NULL;
glxc->readPriv = NULL;
return __glXBadContext;
}
/* resize the buffers */
if (!__glXResizeDrawableBuffers(drawPriv)) {
/* could not do initial resize. make current failed */
(*gc->exports.loseCurrent)((__GLcontext *)gc);
glxc->drawPriv = NULL;
glxc->readPriv = NULL;
return __glXBadContext;
}
glxc->isCurrent = GL_TRUE;
__glXAssociateContext(glxc);
assert(drawPriv->drawGlxc == glxc);
assert(readPriv->readGlxc == glxc);
}
if (prevglxc) {
if (prevglxc->drawPixmap) {
if (prevglxc->drawPixmap != prevglxc->readPixmap) {
/*
** The previous drawable was a glx pixmap, release it.
*/
prevglxc->readPixmap->refcnt--;
if (!prevglxc->readPixmap->idExists &&
!prevglxc->readPixmap->refcnt) {
PixmapPtr pPixmap = (PixmapPtr) prevglxc->readPixmap->pDraw;
/*
** The DestroyPixmap routine should decrement the
** refcount of the X pixmap and free only if it's zero.
*/
(*prevglxc->readPixmap->pScreen->DestroyPixmap)(pPixmap);
__glXFree(prevglxc->readPixmap);
}
}
/*
** The previous drawable was a glx pixmap, release it.
*/
prevglxc->drawPixmap->refcnt--;
if (!prevglxc->drawPixmap->idExists &&
!prevglxc->drawPixmap->refcnt) {
PixmapPtr pPixmap = (PixmapPtr) prevglxc->drawPixmap->pDraw;
/*
** The DestroyPixmap routine should decrement the
** refcount of the X pixmap and free only if it's zero.
*/
(*prevglxc->drawPixmap->pScreen->DestroyPixmap)(pPixmap);
__glXFree(prevglxc->drawPixmap);
}
prevglxc->drawPixmap = NULL;
}
ChangeCurrentContext(cl, glxc, tag);
StopUsingContext(prevglxc);
} else {
tag = AddCurrentContext(cl, glxc);
}
if (glxc) {
if (drawPixmap) {
drawPixmap->refcnt++;
glxc->drawPixmap = drawPixmap;
}
if (readPixmap && (readPixmap != drawPixmap)) {
readPixmap->refcnt++;
glxc->readPixmap = readPixmap;
}
StartUsingContext(cl, glxc);
reply.contextTag = tag;
} else {
reply.contextTag = 0;
}
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__glXSwapMakeCurrentReply(client, &reply);
} else {
WriteToClient(client, sz_xGLXMakeCurrentReply, (char *)&reply);
}
return Success;
}
int __glXIsDirect(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXIsDirectReq *req = (xGLXIsDirectReq *) pc;
xGLXIsDirectReply reply;
__GLXcontext *glxc;
/*
** Find the GL context.
*/
glxc = (__GLXcontext *) LookupIDByType(req->context, __glXContextRes);
if (!glxc) {
client->errorValue = req->context;
return __glXBadContext;
}
reply.isDirect = glxc->isDirect;
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__glXSwapIsDirectReply(client, &reply);
} else {
WriteToClient(client, sz_xGLXIsDirectReply, (char *)&reply);
}
return Success;
}
int __glXQueryVersion(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryVersionReq *req = (xGLXQueryVersionReq *) pc;
xGLXQueryVersionReply reply;
GLuint major, minor;
major = req->majorVersion;
minor = req->minorVersion;
(void)major;
(void)minor;
/*
** Server should take into consideration the version numbers sent by the
** client if it wants to work with older clients; however, in this
** implementation the server just returns its version number.
*/
reply.majorVersion = GLX_SERVER_MAJOR_VERSION;
reply.minorVersion = GLX_SERVER_MINOR_VERSION;
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__glXSwapQueryVersionReply(client, &reply);
} else {
WriteToClient(client, sz_xGLXQueryVersionReply, (char *)&reply);
}
return Success;
}
int __glXWaitGL(__GLXclientState *cl, GLbyte *pc)
{
xGLXWaitGLReq *req = (xGLXWaitGLReq *)pc;
int error;
if (!__glXForceCurrent(cl, req->contextTag, &error)) {
return error;
}
glFinish();
return Success;
}
int __glXWaitX(__GLXclientState *cl, GLbyte *pc)
{
xGLXWaitXReq *req = (xGLXWaitXReq *)pc;
int error;
if (!__glXForceCurrent(cl, req->contextTag, &error)) {
return error;
}
/*
** In a multithreaded server that had separate X and GL threads, we would
** have to wait for the X thread to finish before returning. As it stands,
** this sample implementation only supports singlethreaded servers, and
** nothing needs to be done here.
*/
return Success;
}
int __glXCopyContext(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXCopyContextReq *req = (xGLXCopyContextReq *) pc;
GLXContextID source = req->source;
GLXContextID dest = req->dest;
GLXContextTag tag = req->contextTag;
unsigned long mask = req->mask;
__GLXcontext *src, *dst;
int error;
/*
** Check that each context exists.
*/
src = (__GLXcontext *) LookupIDByType(source, __glXContextRes);
if (!src) {
client->errorValue = source;
return __glXBadContext;
}
dst = (__GLXcontext *) LookupIDByType(dest, __glXContextRes);
if (!dst) {
client->errorValue = dest;
return __glXBadContext;
}
/*
** They must be in the same address space, and same screen.
** NOTE: no support for direct rendering contexts here.
*/
if (src->isDirect || dst->isDirect ||
(src->pGlxScreen != dst->pGlxScreen)) {
client->errorValue = source;
return BadMatch;
}
/*
** The destination context must not be current for any client.
*/
if (dst->isCurrent) {
client->errorValue = dest;
return BadAccess;
}
if (tag) {
__GLXcontext *tagcx = __glXLookupContextByTag(cl, tag);
if (!tagcx) {
return __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.
*/
glFinish();
__GLX_NOTE_FLUSHED_CMDS(tagcx);
} else {
return error;
}
}
/*
** Issue copy. The only reason for failure is a bad mask.
*/
if (!(*dst->gc->exports.copyContext)((__GLcontext *)dst->gc,
(__GLcontext *)src->gc,
mask)) {
client->errorValue = mask;
return BadValue;
}
return Success;
}
int __glXGetVisualConfigs(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXGetVisualConfigsReq *req = (xGLXGetVisualConfigsReq *) pc;
xGLXGetVisualConfigsReply reply;
__GLXscreenInfo *pGlxScreen;
__GLXvisualConfig *pGlxVisual;
CARD32 buf[__GLX_TOTAL_CONFIG];
unsigned int screen;
int i, p;
screen = req->screen;
if (screen >= screenInfo.numScreens) {
/* The client library must send a valid screen number. */
client->errorValue = screen;
return BadValue;
}
pGlxScreen = &__glXActiveScreens[screen];
reply.numVisuals = pGlxScreen->numUsableVisuals;
reply.numProps = __GLX_TOTAL_CONFIG;
reply.length = (pGlxScreen->numUsableVisuals * __GLX_SIZE_CARD32 *
__GLX_TOTAL_CONFIG) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
WriteToClient(client, sz_xGLXGetVisualConfigsReply, (char *)&reply);
for (i=0; i < pGlxScreen->numVisuals; i++) {
pGlxVisual = &pGlxScreen->pGlxVisual[i];
if (pGlxVisual->vid == 0) {
/* not a usable visual */
continue;
}
p = 0;
buf[p++] = pGlxVisual->vid;
buf[p++] = pGlxVisual->class;
buf[p++] = pGlxVisual->rgba;
buf[p++] = pGlxVisual->redSize;
buf[p++] = pGlxVisual->greenSize;
buf[p++] = pGlxVisual->blueSize;
buf[p++] = pGlxVisual->alphaSize;
buf[p++] = pGlxVisual->accumRedSize;
buf[p++] = pGlxVisual->accumGreenSize;
buf[p++] = pGlxVisual->accumBlueSize;
buf[p++] = pGlxVisual->accumAlphaSize;
buf[p++] = pGlxVisual->doubleBuffer;
buf[p++] = pGlxVisual->stereo;
buf[p++] = pGlxVisual->bufferSize;
buf[p++] = pGlxVisual->depthSize;
buf[p++] = pGlxVisual->stencilSize;
buf[p++] = pGlxVisual->auxBuffers;
buf[p++] = pGlxVisual->level;
/*
** Add token/value pairs for extensions.
*/
buf[p++] = GLX_VISUAL_CAVEAT_EXT;
buf[p++] = pGlxVisual->visualRating;
buf[p++] = GLX_TRANSPARENT_TYPE_EXT;
buf[p++] = pGlxVisual->transparentPixel;
buf[p++] = GLX_TRANSPARENT_RED_VALUE_EXT;
buf[p++] = pGlxVisual->transparentRed;
buf[p++] = GLX_TRANSPARENT_GREEN_VALUE_EXT;
buf[p++] = pGlxVisual->transparentGreen;
buf[p++] = GLX_TRANSPARENT_BLUE_VALUE_EXT;
buf[p++] = pGlxVisual->transparentBlue;
buf[p++] = GLX_TRANSPARENT_ALPHA_VALUE_EXT;
buf[p++] = pGlxVisual->transparentAlpha;
buf[p++] = GLX_TRANSPARENT_INDEX_VALUE_EXT;
buf[p++] = pGlxVisual->transparentIndex;
WriteToClient(client, __GLX_SIZE_CARD32 * __GLX_TOTAL_CONFIG,
(char *)buf);
}
return Success;
}
/*
** Create a GLX Pixmap from an X Pixmap.
*/
int __glXCreateGLXPixmap(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXCreateGLXPixmapReq *req = (xGLXCreateGLXPixmapReq *) pc;
VisualID visual = req->visual;
GLuint screenNum = req->screen;
XID pixmapId = req->pixmap;
XID glxpixmapId = req->glxpixmap;
DrawablePtr pDraw;
ScreenPtr pScreen;
VisualPtr pVisual;
__GLXpixmap *pGlxPixmap;
__GLXscreenInfo *pGlxScreen;
__GLXvisualConfig *pGlxVisual;
int i;
pDraw = (DrawablePtr) LookupDrawable(pixmapId, client);
if (!pDraw || pDraw->type != DRAWABLE_PIXMAP) {
client->errorValue = pixmapId;
return BadPixmap;
}
/*
** Check if screen of visual matches screen of pixmap.
*/
pScreen = pDraw->pScreen;
if (screenNum != pScreen->myNum) {
return BadMatch;
}
/*
** Find the VisualRec for this visual.
*/
pVisual = pScreen->visuals;
for (i=0; i < pScreen->numVisuals; i++, pVisual++) {
if (pVisual->vid == visual) {
break;
}
}
if (i == pScreen->numVisuals) {
client->errorValue = visual;
return BadValue;
}
/*
** Check if depth of visual matches depth of pixmap.
*/
if (pVisual->nplanes != pDraw->depth) {
return BadMatch;
}
/*
** Get configuration of the visual.
*/
pGlxScreen = &__glXActiveScreens[screenNum];
pGlxVisual = pGlxScreen->pGlxVisual;
for (i = 0; i < pGlxScreen->numVisuals; i++, pGlxVisual++) {
if (pGlxVisual->vid == visual) {
break;
}
}
if (i == pGlxScreen->numVisuals) {
/*
** Visual not support on this screen by this OpenGL implementation.
*/
client->errorValue = visual;
return BadValue;
}
pGlxPixmap = (__GLXpixmap *) __glXMalloc(sizeof(__GLXpixmap));
if (!pGlxPixmap) {
return BadAlloc;
}
if (!(AddResource(glxpixmapId, __glXPixmapRes, pGlxPixmap))) {
return BadAlloc;
}
pGlxPixmap->pDraw = pDraw;
pGlxPixmap->pGlxScreen = pGlxScreen;
pGlxPixmap->pGlxVisual = pGlxVisual;
pGlxPixmap->pScreen = pScreen;
pGlxPixmap->idExists = True;
pGlxPixmap->refcnt = 0;
/*
** Bump the ref count on the X pixmap so it won't disappear.
*/
((PixmapPtr) pDraw)->refcnt++;
return Success;
}
int __glXDestroyGLXPixmap(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXDestroyGLXPixmapReq *req = (xGLXDestroyGLXPixmapReq *) pc;
XID glxpixmap = req->glxpixmap;
/*
** Check if it's a valid GLX pixmap.
*/
if (!LookupIDByType(glxpixmap, __glXPixmapRes)) {
client->errorValue = glxpixmap;
return __glXBadPixmap;
}
FreeResource(glxpixmap, FALSE);
return Success;
}
/*****************************************************************************/
/*
** 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 __glXSwapBuffers(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
DrawablePtr pDraw;
xGLXSwapBuffersReq *req = (xGLXSwapBuffersReq *) pc;
GLXContextTag tag = req->contextTag;
XID drawId = req->drawable;
__GLXpixmap *pGlxPixmap;
__GLXcontext *glxc = NULL;
int error;
/*
** Check that the GLX drawable is valid.
*/
pDraw = (DrawablePtr) LookupDrawable(drawId, client);
if (pDraw) {
if (pDraw->type == DRAWABLE_WINDOW) {
/*
** Drawable is an X window.
*/
} else {
/*
** Drawable is an X pixmap, which is not allowed.
*/
client->errorValue = drawId;
return __glXBadDrawable;
}
} else {
pGlxPixmap = (__GLXpixmap *) LookupIDByType(drawId,
__glXPixmapRes);
if (pGlxPixmap) {
/*
** Drawable is a GLX pixmap.
*/
} else {
/*
** Drawable is neither a X window nor a GLX pixmap.
*/
client->errorValue = drawId;
return __glXBadDrawable;
}
}
if (tag) {
glxc = __glXLookupContextByTag(cl, tag);
if (!glxc) {
return __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.
*/
glFinish();
__GLX_NOTE_FLUSHED_CMDS(glxc);
} else {
return error;
}
}
if (pDraw) {
__GLXdrawablePrivate *glxPriv;
if (glxc) {
glxPriv = __glXGetDrawablePrivate(pDraw, drawId, glxc->modes);
if (glxPriv == NULL) {
return __glXBadDrawable;
}
}
else {
glxPriv = __glXFindDrawablePrivate(drawId);
if (glxPriv == NULL) {
/* This is a window we've never seen before, do nothing */
return Success;
}
}
if ((*glxPriv->swapBuffers)(glxPriv) == GL_FALSE) {
return __glXBadDrawable;
}
}
return Success;
}
int __glXQueryContextInfoEXT(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
__GLXcontext *ctx;
xGLXQueryContextInfoEXTReq *req;
xGLXQueryContextInfoEXTReply reply;
int nProps;
int *sendBuf, *pSendBuf;
int nReplyBytes;
req = (xGLXQueryContextInfoEXTReq *)pc;
ctx = (__GLXcontext *) LookupIDByType(req->context, __glXContextRes);
if (!ctx) {
client->errorValue = req->context;
return __glXBadContext;
}
nProps = 3;
reply.length = nProps << 1;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.n = nProps;
nReplyBytes = reply.length << 2;
sendBuf = (int *)__glXMalloc((size_t)nReplyBytes);
if (sendBuf == NULL) {
return __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->pVisual->vid);
*pSendBuf++ = GLX_SCREEN_EXT;
*pSendBuf++ = (int)(ctx->pScreen->myNum);
if (client->swapped) {
__glXSwapQueryContextInfoEXTReply(client, &reply, sendBuf);
} else {
WriteToClient(client, sz_xGLXQueryContextInfoEXTReply, (char *)&reply);
WriteToClient(client, nReplyBytes, (char *)sendBuf);
}
__glXFree((char *)sendBuf);
return Success;
}
/************************************************************************/
/*
** 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 __glXRender(__GLXclientState *cl, GLbyte *pc)
{
xGLXRenderReq *req;
ClientPtr client= cl->client;
int left, cmdlen, error;
int commandsDone;
CARD16 opcode;
__GLXrenderHeader *hdr;
__GLXcontext *glxc;
/*
** NOTE: much of this code also appears in the byteswapping version of this
** routine, __glXSwapRender(). Any changes made here should also be
** duplicated there.
*/
req = (xGLXRenderReq *) pc;
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;
void (* proc)(GLbyte *);
/*
** Verify that the header length and the overall length agree.
** Also, each command must be word aligned.
*/
hdr = (__GLXrenderHeader *) pc;
cmdlen = hdr->length;
opcode = hdr->opcode;
/*
** Check for core opcodes and grab entry data.
*/
if ( (opcode >= __GLX_MIN_RENDER_OPCODE) &&
(opcode <= __GLX_MAX_RENDER_OPCODE) ) {
entry = &__glXRenderSizeTable[opcode];
proc = __glXRenderTable[opcode];
#if __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT
} else if ( (opcode >= __GLX_MIN_RENDER_OPCODE_EXT) &&
(opcode <= __GLX_MAX_RENDER_OPCODE_EXT) ) {
entry =
&__glXRenderSizeTable_EXT[opcode -
__GLX_MIN_RENDER_OPCODE_EXT];
proc = __glXRenderTable_EXT[opcode -
__GLX_MIN_RENDER_OPCODE_EXT];
#endif /* __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT */
} else {
client->errorValue = commandsDone;
return __glXBadRenderRequest;
}
if (!entry->bytes) {
/* unused opcode */
client->errorValue = commandsDone;
return __glXBadRenderRequest;
}
if (entry->varsize) {
/* variable size command */
extra = (*entry->varsize)(pc + __GLX_RENDER_HDR_SIZE, False);
if (extra < 0) {
extra = 0;
}
if (cmdlen != __GLX_PAD(entry->bytes + extra)) {
return BadLength;
}
} else {
/* constant size command */
if (cmdlen != __GLX_PAD(entry->bytes)) {
return BadLength;
}
}
if (left < cmdlen) {
return BadLength;
}
/*
** Skip over the header and execute the command. We allow the
** caller to trash the command memory. This is useful especially
** for things that require double alignment - they can just shift
** the data towards lower memory (trashing the header) by 4 bytes
** and achieve the required alignment.
*/
(*proc)(pc + __GLX_RENDER_HDR_SIZE);
pc += cmdlen;
left -= cmdlen;
commandsDone++;
}
__GLX_NOTE_UNFLUSHED_CMDS(glxc);
return Success;
}
/*
** Execute a large rendering request (one that spans multiple X requests).
*/
int __glXRenderLarge(__GLXclientState *cl, GLbyte *pc)
{
xGLXRenderLargeReq *req;
ClientPtr client= cl->client;
GLuint dataBytes;
void (*proc)(GLbyte *);
__GLXrenderLargeHeader *hdr;
__GLXcontext *glxc;
int error;
CARD16 opcode;
/*
** NOTE: much of this code also appears in the byteswapping version of this
** routine, __glXSwapRenderLarge(). Any changes made here should also be
** duplicated there.
*/
req = (xGLXRenderLargeReq *) pc;
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, cmdlen;
/*
** 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 __glXBadLargeRequest;
}
hdr = (__GLXrenderLargeHeader *) pc;
cmdlen = hdr->length;
opcode = hdr->opcode;
/*
** Check for core opcodes and grab entry data.
*/
if ( (opcode >= __GLX_MIN_RENDER_OPCODE) &&
(opcode <= __GLX_MAX_RENDER_OPCODE) ) {
entry = &__glXRenderSizeTable[opcode];
#if __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT
} else if ( (opcode >= __GLX_MIN_RENDER_OPCODE_EXT) &&
(opcode <= __GLX_MAX_RENDER_OPCODE_EXT) ) {
opcode -= __GLX_MIN_RENDER_OPCODE_EXT;
entry = &__glXRenderSizeTable_EXT[opcode];
#endif /* __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT */
} else {
client->errorValue = opcode;
return __glXBadLargeRequest;
}
if (!entry->bytes) {
/* unused opcode */
client->errorValue = opcode;
return __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, False);
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 *) __glXMalloc((size_t)cmdlen);
} else {
cl->largeCmdBuf = (GLbyte *) __glXRealloc(cl->largeCmdBuf,
(size_t)cmdlen);
}
if (!cl->largeCmdBuf) {
return BadAlloc;
}
cl->largeCmdBufSize = cmdlen;
}
__glXMemcpy(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 __glXBadLargeRequest;
}
if (req->requestTotal != cl->largeCmdRequestsTotal) {
client->errorValue = req->requestTotal;
__glXResetLargeCommandStatus(cl);
return __glXBadLargeRequest;
}
/*
** Check that we didn't get too much data.
*/
if ((cl->largeCmdBytesSoFar + dataBytes) > cl->largeCmdBytesTotal) {
client->errorValue = dataBytes;
__glXResetLargeCommandStatus(cl);
return __glXBadLargeRequest;
}
__glXMemcpy(cl->largeCmdBuf + cl->largeCmdBytesSoFar, pc, dataBytes);
cl->largeCmdBytesSoFar += dataBytes;
cl->largeCmdRequestsSoFar++;
if (req->requestNumber == cl->largeCmdRequestsTotal) {
/*
** 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 __glXBadLargeRequest;
}
hdr = (__GLXrenderLargeHeader *) cl->largeCmdBuf;
opcode = hdr->opcode;
/*
** Use the opcode to index into the procedure table.
*/
if ( (opcode >= __GLX_MIN_RENDER_OPCODE) &&
(opcode <= __GLX_MAX_RENDER_OPCODE) ) {
proc = __glXRenderTable[opcode];
#if __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT
} else if ( (opcode >= __GLX_MIN_RENDER_OPCODE_EXT) &&
(opcode <= __GLX_MAX_RENDER_OPCODE_EXT) ) {
opcode -= __GLX_MIN_RENDER_OPCODE_EXT;
proc = __glXRenderTable_EXT[opcode];
#endif /* __GLX_MAX_RENDER_OPCODE_EXT > __GLX_MIN_RENDER_OPCODE_EXT */
} else {
client->errorValue = opcode;
return __glXBadLargeRequest;
}
/*
** Skip over the header and execute the command.
*/
(*proc)(cl->largeCmdBuf + __GLX_RENDER_LARGE_HDR_SIZE);
__GLX_NOTE_UNFLUSHED_CMDS(glxc);
/*
** Reset for the next RenderLarge series.
*/
__glXResetLargeCommandStatus(cl);
} else {
/*
** This is neither the first nor the last request.
*/
}
return Success;
}
}
/************************************************************************/
/*
** No support is provided for the vendor-private requests other than
** allocating the entry points in the dispatch table.
*/
int __glXVendorPrivate(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req;
GLint vendorcode;
req = (xGLXVendorPrivateReq *) pc;
vendorcode = req->vendorCode;
#ifndef __DARWIN__
switch( vendorcode ) {
case X_GLvop_SampleMaskSGIS:
glSampleMaskSGIS(*(GLfloat *)(pc + 4),
*(GLboolean *)(pc + 8));
return Success;
case X_GLvop_SamplePatternSGIS:
glSamplePatternSGIS( *(GLenum *)(pc + 4));
return Success;
}
#endif
if ((vendorcode >= __GLX_MIN_VENDPRIV_OPCODE_EXT) &&
(vendorcode <= __GLX_MAX_VENDPRIV_OPCODE_EXT)) {
(*__glXVendorPrivTable_EXT[vendorcode-__GLX_MIN_VENDPRIV_OPCODE_EXT])
(cl, (GLbyte*)req);
return Success;
}
/*
** This sample implemention does not support any private requests.
*/
cl->client->errorValue = req->vendorCode;
return __glXUnsupportedPrivateRequest;
}
int __glXVendorPrivateWithReply(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateWithReplyReq *req;
GLint vendorcode;
req = (xGLXVendorPrivateWithReplyReq *) pc;
vendorcode = req->vendorCode;
switch (vendorcode) {
case X_GLXvop_QueryContextInfoEXT:
return __glXQueryContextInfoEXT(cl, pc);
case X_GLXvop_MakeCurrentReadSGI:
return __glXMakeCurrentReadSGI(cl, pc);
default:
break;
}
if ((vendorcode >= __GLX_MIN_VENDPRIV_OPCODE_EXT) &&
(vendorcode <= __GLX_MAX_VENDPRIV_OPCODE_EXT)) {
return
(*__glXVendorPrivTable_EXT[vendorcode-__GLX_MIN_VENDPRIV_OPCODE_EXT])
(cl, (GLbyte*)req);
}
cl->client->errorValue = vendorcode;
return __glXUnsupportedPrivateRequest;
}
int __glXQueryExtensionsString(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryExtensionsStringReq *req = (xGLXQueryExtensionsStringReq *) pc;
xGLXQueryExtensionsStringReply reply;
GLuint screen;
size_t n, length;
const char *ptr;
char *buf;
screen = req->screen;
/*
** Check if screen exists.
*/
if (screen >= screenInfo.numScreens) {
client->errorValue = screen;
return BadValue;
}
ptr = __glXActiveScreens[screen].GLXextensions;
n = __glXStrlen(ptr) + 1;
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
if ((buf = (char *) __glXMalloc(length << 2)) == NULL) {
return BadAlloc;
}
__glXStrncpy(buf, ptr, n);
if (client->swapped) {
glxSwapQueryExtensionsStringReply(client, &reply, buf);
} else {
WriteToClient(client, sz_xGLXQueryExtensionsStringReply,(char *)&reply);
WriteToClient(client, (int)(length << 2), (char *)buf);
}
__glXFree(buf);
return Success;
}
int __glXQueryServerString(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryServerStringReq *req = (xGLXQueryServerStringReq *) pc;
xGLXQueryServerStringReply reply;
int name;
GLuint screen;
size_t n, length;
const char *ptr;
char *buf;
name = req->name;
screen = req->screen;
/*
** Check if screen exists.
*/
if (screen >= screenInfo.numScreens) {
client->errorValue = screen;
return BadValue;
}
switch(name) {
case GLX_VENDOR:
ptr = __glXActiveScreens[screen].GLXvendor;
break;
case GLX_VERSION:
ptr = __glXActiveScreens[screen].GLXversion;
break;
case GLX_EXTENSIONS:
ptr = __glXActiveScreens[screen].GLXextensions;
break;
default:
return BadValue;
}
n = __glXStrlen(ptr) + 1;
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
if ((buf = (char *) Xalloc(length << 2)) == NULL) {
return BadAlloc;
}
__glXStrncpy(buf, ptr, n);
if (client->swapped) {
glxSwapQueryServerStringReply(client, &reply, buf);
} else {
WriteToClient(client, sz_xGLXQueryServerStringReply, (char *)&reply);
WriteToClient(client, (int)(length << 2), buf);
}
__glXFree(buf);
return Success;
}
int __glXClientInfo(__GLXclientState *cl, GLbyte *pc)
{
xGLXClientInfoReq *req = (xGLXClientInfoReq *) pc;
const char *buf;
cl->GLClientmajorVersion = req->major;
cl->GLClientminorVersion = req->minor;
if (cl->GLClientextensions) __glXFree(cl->GLClientextensions);
buf = (const char *)(req+1);
cl->GLClientextensions = __glXStrdup(buf);
return Success;
}
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