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/* $XFree86: xc/programs/Xserver/GL/glx/glxcmds.c,v 1.12 2004/01/28 18:11:50 alanh 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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