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xserver/GL/glx/glxcmds.c

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/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/
#define NEED_REPLIES
#define FONT_PCF
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <string.h>
#include <assert.h>
#include "glxserver.h"
#include <GL/glxtokens.h>
#include <unpack.h>
#include "g_disptab.h"
#include <pixmapstr.h>
#include <windowstr.h>
#include "glxutil.h"
#include "glxext.h"
#include "glcontextmodes.h"
#include "glapitable.h"
#include "glapi.h"
#include "glthread.h"
#include "dispatch.h"
#include "indirect_dispatch.h"
#include "indirect_table.h"
#include "indirect_util.h"
/************************************************************************/
void
GlxSetRenderTables (struct _glapi_table *table)
{
_glapi_set_dispatch (table);
}
/************************************************************************/
void
__glXContextDestroy(__GLXcontext *context)
{
__glXFlushContextCache();
}
static void __glXdirectContextDestroy(__GLXcontext *context)
{
__glXContextDestroy(context);
xfree(context);
}
static __GLXcontext *__glXdirectContextCreate(__GLXscreen *screen,
__GLcontextModes *modes,
__GLXcontext *shareContext)
{
__GLXcontext *context;
context = xalloc (sizeof (__GLXcontext));
if (context == NULL)
return NULL;
memset(context, 0, sizeof *context);
context->destroy = __glXdirectContextDestroy;
return context;
}
/**
* Create a GL context with the given properties. This routine is used
* to implement \c glXCreateContext, \c glXCreateNewContext, and
* \c glXCreateContextWithConfigSGIX. This works becuase of the hack way
* that GLXFBConfigs are implemented. Basically, the FBConfigID is the
* same as the VisualID.
*/
int DoCreateContext(__GLXclientState *cl, GLXContextID gcId,
GLXContextID shareList, VisualID visual,
GLuint screen, GLboolean isDirect)
{
ClientPtr client = cl->client;
VisualPtr pVisual;
ScreenPtr pScreen;
__GLXcontext *glxc, *shareglxc;
__GLcontextModes *modes;
__GLXscreen *pGlxScreen;
GLint i;
LEGAL_NEW_RESOURCE(gcId, client);
/*
** 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.
*/
modes = _gl_context_modes_find_visual( pGlxScreen->modes, visual );
if (modes == NULL) {
/*
** 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) {
shareglxc = 0;
} else {
shareglxc = (__GLXcontext *) LookupIDByType(shareList, __glXContextRes);
if (!shareglxc) {
client->errorValue = shareList;
return __glXError(GLXBadContext);
}
if (shareglxc->isDirect) {
/*
** NOTE: no support for sharing display lists between direct
** contexts, even if they are in the same address space.
*/
#if 0
/* Disabling this code seems to allow shared display lists
* and texture objects to work. We'll leave it disabled for now.
*/
client->errorValue = shareList;
return BadMatch;
#endif
} else {
/*
** Create an indirect context regardless of what the client asked
** for; this way we can share display list space with shareList.
*/
isDirect = GL_FALSE;
}
}
/*
** Allocate memory for the new context
*/
if (!isDirect)
glxc = pGlxScreen->createContext(pGlxScreen, modes, shareglxc);
else
glxc = __glXdirectContextCreate(pGlxScreen, modes, shareglxc);
if (!glxc) {
return BadAlloc;
}
/*
** Initially, setup the part of the context that could be used by
** a GL core that needs windowing information (e.g., Mesa).
*/
glxc->pScreen = pScreen;
glxc->pGlxScreen = pGlxScreen;
glxc->pVisual = pVisual;
glxc->modes = modes;
/*
** Register this context as a resource.
*/
if (!AddResource(gcId, __glXContextRes, (pointer)glxc)) {
(*glxc->destroy)(glxc);
client->errorValue = gcId;
return BadAlloc;
}
/*
** Finally, now that everything is working, setup the rest of the
** context.
*/
glxc->id = gcId;
glxc->share_id = shareList;
glxc->idExists = GL_TRUE;
glxc->isCurrent = GL_FALSE;
glxc->isDirect = isDirect;
glxc->renderMode = GL_RENDER;
return Success;
}
int __glXDisp_CreateContext(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateContextReq *req = (xGLXCreateContextReq *) pc;
return DoCreateContext( cl, req->context, req->shareList, req->visual,
req->screen, req->isDirect );
}
int __glXDisp_CreateNewContext(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateNewContextReq *req = (xGLXCreateNewContextReq *) pc;
return DoCreateContext( cl, req->context, req->shareList, req->fbconfig,
req->screen, req->isDirect );
}
int __glXDisp_CreateContextWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateContextWithConfigSGIXReq *req =
(xGLXCreateContextWithConfigSGIXReq *) pc;
return DoCreateContext( cl, req->context, req->shareList, req->fbconfig,
req->screen, req->isDirect );
}
/*
** Destroy a GL context as an X resource.
*/
int __glXDisp_DestroyContext(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXDestroyContextReq *req = (xGLXDestroyContextReq *) pc;
GLXContextID gcId = req->context;
__GLXcontext *glxc;
glxc = (__GLXcontext *) LookupIDByType(gcId, __glXContextRes);
if (glxc) {
/*
** Just free the resource; don't actually destroy the context,
** because it might be in use. The
** destroy method will be called by the resource destruction routine
** if necessary.
*/
FreeResourceByType(gcId, __glXContextRes, FALSE);
return Success;
} else {
client->errorValue = gcId;
return __glXError(GLXBadContext);
}
}
/*****************************************************************************/
/*
** For each client, the server keeps a table of all the contexts that are
** current for that client (each thread of a client may have its own current
** context). These routines add, change, and lookup contexts in the table.
*/
/*
** Add a current context, and return the tag that will be used to refer to it.
*/
static int AddCurrentContext(__GLXclientState *cl, __GLXcontext *glxc)
{
int i;
int num = cl->numCurrentContexts;
__GLXcontext **table = cl->currentContexts;
if (!glxc) return -1;
/*
** Try to find an empty slot and use it.
*/
for (i=0; i < num; i++) {
if (!table[i]) {
table[i] = glxc;
return i+1;
}
}
/*
** Didn't find a free slot, so we'll have to grow the table.
*/
if (!num) {
table = (__GLXcontext **) xalloc(sizeof(__GLXcontext *));
} else {
table = (__GLXcontext **) xrealloc(table,
(num+1)*sizeof(__GLXcontext *));
}
table[num] = glxc;
cl->currentContexts = table;
cl->numCurrentContexts++;
return num+1;
}
/*
** Given a tag, change the current context for the corresponding entry.
*/
static void ChangeCurrentContext(__GLXclientState *cl, __GLXcontext *glxc,
GLXContextTag tag)
{
__GLXcontext **table = cl->currentContexts;
table[tag-1] = glxc;
}
/*
** For this implementation we have chosen to simply use the index of the
** context's entry in the table as the context tag. A tag must be greater
** than 0.
*/
__GLXcontext *__glXLookupContextByTag(__GLXclientState *cl, GLXContextTag tag)
{
int num = cl->numCurrentContexts;
if (tag < 1 || tag > num) {
return 0;
} else {
return cl->currentContexts[tag-1];
}
}
/*****************************************************************************/
static void StopUsingContext(__GLXcontext *glxc)
{
if (glxc) {
if (glxc == __glXLastContext) {
/* Tell server GL library */
__glXLastContext = 0;
}
glxc->isCurrent = GL_FALSE;
if (!glxc->idExists) {
__glXFreeContext(glxc);
}
}
}
static void StartUsingContext(__GLXclientState *cl, __GLXcontext *glxc)
{
glxc->isCurrent = GL_TRUE;
}
/*****************************************************************************/
/*
** Make an OpenGL context and drawable current.
*/
int __glXDisp_MakeCurrent(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeCurrentReq *req = (xGLXMakeCurrentReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->drawable,
req->context, req->oldContextTag );
}
int __glXDisp_MakeContextCurrent(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeContextCurrentReq *req = (xGLXMakeContextCurrentReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->readdrawable,
req->context, req->oldContextTag );
}
int __glXDisp_MakeCurrentReadSGI(__GLXclientState *cl, GLbyte *pc)
{
xGLXMakeCurrentReadSGIReq *req = (xGLXMakeCurrentReadSGIReq *) pc;
return DoMakeCurrent( cl, req->drawable, req->readable,
req->context, req->oldContextTag );
}
/**
* 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,
__GLXdrawable **ppGlxDraw,
__GLXpixmap **ppPixmap,
ClientPtr client )
{
DrawablePtr pDraw;
__GLcontextModes *modes;
__GLXdrawable *pGlxDraw;
__GLXpixmap *drawPixmap = NULL;
int rc;
/* This is the GLX 1.3 case - the client passes in a GLXWindow and
* we just return the __GLXdrawable. The first time a GLXPixmap
* comes in, it doesn't have a corresponding __GLXdrawable, so it
* falls through to the else-case below, but after that it'll have
* a __GLXdrawable and we'll handle it here. */
pGlxDraw = (__GLXdrawable *) LookupIDByType(drawId, __glXDrawableRes);
if (pGlxDraw != NULL) {
if (glxc != NULL && pGlxDraw->modes != glxc->modes) {
client->errorValue = drawId;
return BadMatch;
}
*ppGlxDraw = pGlxDraw;
*ppPixmap = pGlxDraw->pGlxPixmap;
return Success;
}
/* The drawId wasn't a GLXWindow, so presumably it's a regular X
* window. In that case, we create a shadow GLXWindow for it on
* demand here for pre GLX 1.3 compatibility and use the X Window
* XID as its GLXWindow XID. The client can't explicitly create a
* GLXWindow with the same XID as an X Window, so we wont get any
* resource ID clashes. Effectively, the X Window is now also a
* GLXWindow. */
rc = dixLookupDrawable(&pDraw, drawId, client, 0, DixUnknownAccess);
if (rc == Success) {
if (pDraw->type == DRAWABLE_WINDOW) {
VisualID vid = wVisual((WindowPtr)pDraw);
modes = _gl_context_modes_find_visual(glxc->pGlxScreen->modes,
vid);
} 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 __glXError(GLXBadDrawable);
}
} else {
drawPixmap = (__GLXpixmap *) LookupIDByType(drawId, __glXPixmapRes);
if (drawPixmap) {
pDraw = drawPixmap->pDraw;
modes = drawPixmap->modes;
} else {
/*
** Drawable is neither a Window nor a GLXPixmap.
*/
client->errorValue = drawId;
return __glXError(GLXBadDrawable);
}
}
/* If we're not given a context, don't create the __GLXdrawable */
if (glxc == NULL) {
*ppPixmap = NULL;
*ppGlxDraw = NULL;
return Success;
}
/* We're binding an X Window or a GLX Pixmap for the first time
* and need to create a GLX drawable for it. First check that the
* drawable screen and fbconfig matches the context ditto. */
if (pDraw->pScreen != glxc->pScreen || modes != glxc->modes) {
client->errorValue = drawId;
return BadMatch;
}
pGlxDraw =
glxc->pGlxScreen->createDrawable(glxc->pGlxScreen,
pDraw, drawId, modes);
/* since we are creating the drawablePrivate, drawId should be new */
if (!AddResource(drawId, __glXDrawableRes, pGlxDraw)) {
pGlxDraw->destroy (pGlxDraw);
return BadAlloc;
}
*ppPixmap = drawPixmap;
*ppGlxDraw = pGlxDraw;
return 0;
}
int DoMakeCurrent( __GLXclientState *cl,
GLXDrawable drawId, GLXDrawable readId,
GLXContextID contextId, GLXContextTag tag )
{
ClientPtr client = cl->client;
xGLXMakeCurrentReply reply;
__GLXpixmap *drawPixmap = NULL;
__GLXpixmap *readPixmap = NULL;
__GLXcontext *glxc, *prevglxc;
__GLXdrawable *drawPriv = NULL;
__GLXdrawable *readPriv = NULL;
GLint error;
GLuint mask;
/*
** If one is None and the other isn't, it's a bad match.
*/
mask = (drawId == None) ? (1 << 0) : 0;
mask |= (readId == None) ? (1 << 1) : 0;
mask |= (contextId == None) ? (1 << 2) : 0;
if ( (mask != 0x00) && (mask != 0x07) ) {
return BadMatch;
}
/*
** Lookup old context. If we have one, it must be in a usable state.
*/
if (tag != 0) {
prevglxc = __glXLookupContextByTag(cl, tag);
if (!prevglxc) {
/*
** Tag for previous context is invalid.
*/
return __glXError(GLXBadContextTag);
}
if (prevglxc->renderMode != GL_RENDER) {
/* Oops. Not in render mode render. */
client->errorValue = prevglxc->id;
return __glXError(GLXBadContextState);
}
} else {
prevglxc = 0;
}
/*
** Lookup new context. It must not be current for someone else.
*/
if (contextId != None) {
int status;
glxc = (__GLXcontext *) LookupIDByType(contextId, __glXContextRes);
if (!glxc) {
client->errorValue = contextId;
return __glXError(GLXBadContext);
}
if ((glxc != prevglxc) && glxc->isCurrent) {
/* Context is current to somebody else */
return BadAccess;
}
assert( drawId != None );
assert( readId != None );
status = GetDrawableOrPixmap(glxc, drawId, &drawPriv, &drawPixmap,
client);
if ( status != 0 ) {
return status;
}
if ( readId != drawId ) {
status = GetDrawableOrPixmap(glxc, readId, &readPriv, &readPixmap,
client);
if ( status != 0 ) {
return status;
}
} else {
readPriv = drawPriv;
}
} else {
/* Switching to no context. Ignore new drawable. */
glxc = 0;
drawPriv = 0;
readPriv = 0;
}
if (prevglxc) {
/*
** Flush the previous context if needed.
*/
if (__GLX_HAS_UNFLUSHED_CMDS(prevglxc)) {
if (__glXForceCurrent(cl, tag, (int *)&error)) {
CALL_Flush( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(prevglxc);
} else {
return error;
}
}
/*
** Make the previous context not current.
*/
if (!(*prevglxc->loseCurrent)(prevglxc)) {
return __glXError(GLXBadContext);
}
__glXFlushContextCache();
__glXDeassociateContext(prevglxc);
}
if ((glxc != 0) && !glxc->isDirect) {
glxc->drawPriv = drawPriv;
glxc->readPriv = readPriv;
/* make the context current */
if (!(*glxc->makeCurrent)(glxc)) {
glxc->drawPriv = NULL;
glxc->readPriv = NULL;
return __glXError(GLXBadContext);
}
/* resize the buffers */
if (!(*drawPriv->resize)(drawPriv)) {
/* could not do initial resize. make current failed */
(*glxc->loseCurrent)(glxc);
glxc->drawPriv = NULL;
glxc->readPriv = NULL;
return __glXError(GLXBadContext);
}
glxc->isCurrent = GL_TRUE;
__glXAssociateContext(glxc);
assert(drawPriv->drawGlxc == glxc);
assert(readPriv->readGlxc == glxc);
}
if (prevglxc) {
if (prevglxc->drawPixmap) {
if (prevglxc->readPixmap &&
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);
xfree(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);
xfree(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 __glXDisp_IsDirect(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXIsDirectReq *req = (xGLXIsDirectReq *) pc;
xGLXIsDirectReply reply;
__GLXcontext *glxc;
/*
** Find the GL context.
*/
glxc = (__GLXcontext *) LookupIDByType(req->context, __glXContextRes);
if (!glxc) {
client->errorValue = req->context;
return __glXError(GLXBadContext);
}
reply.isDirect = glxc->isDirect;
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__glXSwapIsDirectReply(client, &reply);
} else {
WriteToClient(client, sz_xGLXIsDirectReply, (char *)&reply);
}
return Success;
}
int __glXDisp_QueryVersion(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryVersionReq *req = (xGLXQueryVersionReq *) pc;
xGLXQueryVersionReply reply;
GLuint major, minor;
major = req->majorVersion;
minor = req->minorVersion;
(void)major;
(void)minor;
/*
** Server should take into consideration the version numbers sent by the
** client if it wants to work with older clients; however, in this
** implementation the server just returns its version number.
*/
reply.majorVersion = GLX_SERVER_MAJOR_VERSION;
reply.minorVersion = GLX_SERVER_MINOR_VERSION;
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__glXSwapQueryVersionReply(client, &reply);
} else {
WriteToClient(client, sz_xGLXQueryVersionReply, (char *)&reply);
}
return Success;
}
int __glXDisp_WaitGL(__GLXclientState *cl, GLbyte *pc)
{
xGLXWaitGLReq *req = (xGLXWaitGLReq *)pc;
int error;
if (!__glXForceCurrent(cl, req->contextTag, &error)) {
return error;
}
CALL_Finish( GET_DISPATCH(), () );
return Success;
}
int __glXDisp_WaitX(__GLXclientState *cl, GLbyte *pc)
{
xGLXWaitXReq *req = (xGLXWaitXReq *)pc;
int error;
if (!__glXForceCurrent(cl, req->contextTag, &error)) {
return error;
}
/*
** In a multithreaded server that had separate X and GL threads, we would
** have to wait for the X thread to finish before returning. As it stands,
** this sample implementation only supports singlethreaded servers, and
** nothing needs to be done here.
*/
return Success;
}
int __glXDisp_CopyContext(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXCopyContextReq *req = (xGLXCopyContextReq *) pc;
GLXContextID source = req->source;
GLXContextID dest = req->dest;
GLXContextTag tag = req->contextTag;
unsigned long mask = req->mask;
__GLXcontext *src, *dst;
int error;
/*
** Check that each context exists.
*/
src = (__GLXcontext *) LookupIDByType(source, __glXContextRes);
if (!src) {
client->errorValue = source;
return __glXError(GLXBadContext);
}
dst = (__GLXcontext *) LookupIDByType(dest, __glXContextRes);
if (!dst) {
client->errorValue = dest;
return __glXError(GLXBadContext);
}
/*
** They must be in the same address space, and same screen.
** NOTE: no support for direct rendering contexts here.
*/
if (src->isDirect || dst->isDirect ||
(src->pGlxScreen != dst->pGlxScreen)) {
client->errorValue = source;
return BadMatch;
}
/*
** The destination context must not be current for any client.
*/
if (dst->isCurrent) {
client->errorValue = dest;
return BadAccess;
}
if (tag) {
__GLXcontext *tagcx = __glXLookupContextByTag(cl, tag);
if (!tagcx) {
return __glXError(GLXBadContextTag);
}
if (tagcx != src) {
/*
** This would be caused by a faulty implementation of the client
** library.
*/
return BadMatch;
}
/*
** In this case, glXCopyContext is in both GL and X streams, in terms
** of sequentiality.
*/
if (__glXForceCurrent(cl, tag, &error)) {
/*
** Do whatever is needed to make sure that all preceding requests
** in both streams are completed before the copy is executed.
*/
CALL_Finish( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(tagcx);
} else {
return error;
}
}
/*
** Issue copy. The only reason for failure is a bad mask.
*/
if (!(*dst->copy)(dst, src, mask)) {
client->errorValue = mask;
return BadValue;
}
return Success;
}
int DoGetVisualConfigs(__GLXclientState *cl, unsigned screen,
GLboolean do_swap)
{
ClientPtr client = cl->client;
xGLXGetVisualConfigsReply reply;
__GLXscreen *pGlxScreen;
__GLcontextModes *modes;
CARD32 buf[__GLX_TOTAL_CONFIG];
int p;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_DECLARE_SWAP_ARRAY_VARIABLES;
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;
if ( do_swap ) {
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.length);
__GLX_SWAP_INT(&reply.numVisuals);
__GLX_SWAP_INT(&reply.numProps);
}
WriteToClient(client, sz_xGLXGetVisualConfigsReply, (char *)&reply);
for ( modes = pGlxScreen->modes ; modes != NULL ; modes = modes->next ) {
if (modes->visualID == 0) {
/* not a usable visual */
continue;
}
p = 0;
buf[p++] = modes->visualID;
buf[p++] = _gl_convert_to_x_visual_type( modes->visualType );
buf[p++] = modes->rgbMode;
buf[p++] = modes->redBits;
buf[p++] = modes->greenBits;
buf[p++] = modes->blueBits;
buf[p++] = modes->alphaBits;
buf[p++] = modes->accumRedBits;
buf[p++] = modes->accumGreenBits;
buf[p++] = modes->accumBlueBits;
buf[p++] = modes->accumAlphaBits;
buf[p++] = modes->doubleBufferMode;
buf[p++] = modes->stereoMode;
buf[p++] = modes->rgbBits;
buf[p++] = modes->depthBits;
buf[p++] = modes->stencilBits;
buf[p++] = modes->numAuxBuffers;
buf[p++] = modes->level;
/*
** Add token/value pairs for extensions.
*/
buf[p++] = GLX_VISUAL_CAVEAT_EXT;
buf[p++] = modes->visualRating;
buf[p++] = GLX_TRANSPARENT_TYPE;
buf[p++] = modes->transparentPixel;
buf[p++] = GLX_TRANSPARENT_RED_VALUE;
buf[p++] = modes->transparentRed;
buf[p++] = GLX_TRANSPARENT_GREEN_VALUE;
buf[p++] = modes->transparentGreen;
buf[p++] = GLX_TRANSPARENT_BLUE_VALUE;
buf[p++] = modes->transparentBlue;
buf[p++] = GLX_TRANSPARENT_ALPHA_VALUE;
buf[p++] = modes->transparentAlpha;
buf[p++] = GLX_TRANSPARENT_INDEX_VALUE;
buf[p++] = modes->transparentIndex;
if ( do_swap ) {
__GLX_SWAP_INT_ARRAY(buf, __GLX_TOTAL_CONFIG);
}
WriteToClient(client, __GLX_SIZE_CARD32 * __GLX_TOTAL_CONFIG,
(char *)buf);
}
return Success;
}
int __glXDisp_GetVisualConfigs(__GLXclientState *cl, GLbyte *pc)
{
xGLXGetVisualConfigsReq *req = (xGLXGetVisualConfigsReq *) pc;
return DoGetVisualConfigs( cl, req->screen, GL_FALSE );
}
/* Composite adds a 32 bit ARGB visual after glxvisuals.c have created
* the context modes for the screens. This visual is useful for GLX
* pixmaps, so we create a single mode for this visual with no extra
* buffers. */
static void
__glXCreateARGBConfig(__GLXscreen *screen)
{
__GLcontextModes *modes;
VisualPtr visual;
int i;
visual = NULL;
for (i = 0; i < screen->pScreen->numVisuals; i++)
if (screen->pScreen->visuals[i].nplanes == 32) {
visual = &screen->pScreen->visuals[i];
break;
}
if (visual == NULL || visual->class != TrueColor)
return;
/* Stop now if we already added the mode. */
if (_gl_context_modes_find_visual (screen->modes, visual->vid))
return;
modes = _gl_context_modes_create(1, sizeof(__GLcontextModes));
if (modes == NULL)
return;
modes->next = screen->modes;
screen->modes = modes;
screen->numUsableVisuals++;
screen->numVisuals++;
modes->visualID = visual->vid;
modes->fbconfigID = visual->vid;
modes->visualType = GLX_TRUE_COLOR;
modes->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT;
modes->renderType = GLX_RGBA_BIT;
modes->xRenderable = GL_TRUE;
modes->rgbMode = TRUE;
modes->colorIndexMode = FALSE;
modes->doubleBufferMode = FALSE;
modes->stereoMode = FALSE;
modes->haveAccumBuffer = FALSE;
modes->redBits = visual->bitsPerRGBValue;;
modes->greenBits = visual->bitsPerRGBValue;
modes->blueBits = visual->bitsPerRGBValue;
modes->alphaBits = visual->bitsPerRGBValue;
modes->rgbBits = 4 * visual->bitsPerRGBValue;
modes->indexBits = 0;
modes->level = 0;
modes->numAuxBuffers = 0;
modes->haveDepthBuffer = FALSE;
modes->depthBits = 0;
modes->haveStencilBuffer = FALSE;
modes->stencilBits = 0;
modes->visualRating = GLX_NON_CONFORMANT_CONFIG;
}
#define __GLX_TOTAL_FBCONFIG_ATTRIBS (28)
#define __GLX_FBCONFIG_ATTRIBS_LENGTH (__GLX_TOTAL_FBCONFIG_ATTRIBS * 2)
/**
* Send the set of GLXFBConfigs to the client. There is not currently
* and interface into the driver on the server-side to get GLXFBConfigs,
* so we "invent" some based on the \c __GLXvisualConfig structures that
* the driver does supply.
*
* The reply format for both \c glXGetFBConfigs and \c glXGetFBConfigsSGIX
* is the same, so this routine pulls double duty.
*/
int DoGetFBConfigs(__GLXclientState *cl, unsigned screen, GLboolean do_swap)
{
ClientPtr client = cl->client;
xGLXGetFBConfigsReply reply;
__GLXscreen *pGlxScreen;
CARD32 buf[__GLX_FBCONFIG_ATTRIBS_LENGTH];
int p;
__GLcontextModes *modes;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_DECLARE_SWAP_ARRAY_VARIABLES;
if (screen >= screenInfo.numScreens) {
/* The client library must send a valid screen number. */
client->errorValue = screen;
return BadValue;
}
pGlxScreen = __glXActiveScreens[screen];
__glXCreateARGBConfig(pGlxScreen);
reply.numFBConfigs = pGlxScreen->numUsableVisuals;
reply.numAttribs = __GLX_TOTAL_FBCONFIG_ATTRIBS;
reply.length = (__GLX_FBCONFIG_ATTRIBS_LENGTH * reply.numFBConfigs);
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if ( do_swap ) {
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.length);
__GLX_SWAP_INT(&reply.numFBConfigs);
__GLX_SWAP_INT(&reply.numAttribs);
}
WriteToClient(client, sz_xGLXGetFBConfigsReply, (char *)&reply);
for ( modes = pGlxScreen->modes ; modes != NULL ; modes = modes->next ) {
if (modes->visualID == 0) {
/* not a usable visual */
continue;
}
p = 0;
#define WRITE_PAIR(tag,value) \
do { buf[p++] = tag ; buf[p++] = value ; } while( 0 )
WRITE_PAIR( GLX_VISUAL_ID, modes->visualID );
WRITE_PAIR( GLX_FBCONFIG_ID, modes->visualID );
WRITE_PAIR( GLX_X_RENDERABLE, GL_TRUE );
WRITE_PAIR( GLX_RGBA, modes->rgbMode );
WRITE_PAIR( GLX_DOUBLEBUFFER, modes->doubleBufferMode );
WRITE_PAIR( GLX_STEREO, modes->stereoMode );
WRITE_PAIR( GLX_BUFFER_SIZE, modes->rgbBits );
WRITE_PAIR( GLX_LEVEL, modes->level );
WRITE_PAIR( GLX_AUX_BUFFERS, modes->numAuxBuffers );
WRITE_PAIR( GLX_RED_SIZE, modes->redBits );
WRITE_PAIR( GLX_GREEN_SIZE, modes->greenBits );
WRITE_PAIR( GLX_BLUE_SIZE, modes->blueBits );
WRITE_PAIR( GLX_ALPHA_SIZE, modes->alphaBits );
WRITE_PAIR( GLX_ACCUM_RED_SIZE, modes->accumRedBits );
WRITE_PAIR( GLX_ACCUM_GREEN_SIZE, modes->accumGreenBits );
WRITE_PAIR( GLX_ACCUM_BLUE_SIZE, modes->accumBlueBits );
WRITE_PAIR( GLX_ACCUM_ALPHA_SIZE, modes->accumAlphaBits );
WRITE_PAIR( GLX_DEPTH_SIZE, modes->depthBits );
WRITE_PAIR( GLX_STENCIL_SIZE, modes->stencilBits );
WRITE_PAIR( GLX_X_VISUAL_TYPE, modes->visualType );
/*
** Add token/value pairs for extensions.
*/
WRITE_PAIR( GLX_CONFIG_CAVEAT, modes->visualRating );
WRITE_PAIR( GLX_TRANSPARENT_TYPE, modes->transparentPixel );
WRITE_PAIR( GLX_TRANSPARENT_RED_VALUE, modes->transparentRed );
WRITE_PAIR( GLX_TRANSPARENT_GREEN_VALUE, modes->transparentGreen );
WRITE_PAIR( GLX_TRANSPARENT_BLUE_VALUE, modes->transparentBlue );
WRITE_PAIR( GLX_TRANSPARENT_ALPHA_VALUE, modes->transparentAlpha );
WRITE_PAIR( GLX_TRANSPARENT_INDEX_VALUE, modes->transparentIndex );
WRITE_PAIR( GLX_SWAP_METHOD_OML, modes->swapMethod );
if ( do_swap ) {
__GLX_SWAP_INT_ARRAY(buf, __GLX_FBCONFIG_ATTRIBS_LENGTH);
}
WriteToClient(client, __GLX_SIZE_CARD32 * __GLX_FBCONFIG_ATTRIBS_LENGTH,
(char *)buf);
}
return Success;
}
int __glXDisp_GetFBConfigs(__GLXclientState *cl, GLbyte *pc)
{
xGLXGetFBConfigsReq *req = (xGLXGetFBConfigsReq *) pc;
return DoGetFBConfigs( cl, req->screen, GL_FALSE );
}
int __glXDisp_GetFBConfigsSGIX(__GLXclientState *cl, GLbyte *pc)
{
xGLXGetFBConfigsSGIXReq *req = (xGLXGetFBConfigsSGIXReq *) pc;
return DoGetFBConfigs( cl, req->screen, GL_FALSE );
}
static int ValidateCreateDrawable(ClientPtr client,
int screenNum, XID fbconfigId,
XID drawablId, XID glxDrawableId,
int type, __GLcontextModes **modes,
DrawablePtr *ppDraw)
{
DrawablePtr pDraw;
ScreenPtr pScreen;
VisualPtr pVisual;
__GLXscreen *pGlxScreen;
int i, rc;
LEGAL_NEW_RESOURCE(glxDrawableId, client);
rc = dixLookupDrawable(&pDraw, drawablId, client, 0, DixUnknownAccess);
if (rc != Success || pDraw->type != type) {
client->errorValue = drawablId;
return type == DRAWABLE_WINDOW ? BadWindow : BadPixmap;
}
/* Check if screen of the fbconfig matches screen of drawable. */
pScreen = pDraw->pScreen;
if (screenNum != pScreen->myNum) {
return BadMatch;
}
/* If this fbconfig has a corresponding VisualRec the number of
* planes must match the drawable depth. */
pVisual = pScreen->visuals;
for (i = 0; i < pScreen->numVisuals; i++, pVisual++) {
if (pVisual->vid == fbconfigId && pVisual->nplanes != pDraw->depth)
return BadMatch;
}
/* Get configuration of the visual. */
pGlxScreen = __glXgetActiveScreen(screenNum);
*modes = _gl_context_modes_find_visual(pGlxScreen->modes, fbconfigId);
if (*modes == NULL) {
/* Visual not support on this screen by this OpenGL implementation. */
client->errorValue = fbconfigId;
return BadValue;
}
*ppDraw = pDraw;
return Success;
}
/*
** Create a GLX Pixmap from an X Pixmap.
*/
int DoCreateGLXPixmap(__GLXclientState *cl, XID fbconfigId,
GLuint screenNum, XID pixmapId, XID glxPixmapId)
{
ClientPtr client = cl->client;
DrawablePtr pDraw;
__GLXpixmap *pGlxPixmap;
__GLcontextModes *modes;
int retval;
retval = ValidateCreateDrawable (client, screenNum, fbconfigId,
pixmapId, glxPixmapId,
DRAWABLE_PIXMAP, &modes, &pDraw);
if (retval != Success)
return retval;
pGlxPixmap = (__GLXpixmap *) xalloc(sizeof(__GLXpixmap));
if (!pGlxPixmap) {
return BadAlloc;
}
if (!(AddResource(glxPixmapId, __glXPixmapRes, pGlxPixmap))) {
return BadAlloc;
}
pGlxPixmap->pDraw = pDraw;
pGlxPixmap->pGlxScreen = __glXgetActiveScreen(screenNum);
pGlxPixmap->pScreen = pDraw->pScreen;
pGlxPixmap->idExists = True;
pGlxPixmap->pDamage = NULL;
pGlxPixmap->refcnt = 0;
pGlxPixmap->modes = modes;
/*
** Bump the ref count on the X pixmap so it won't disappear.
*/
((PixmapPtr) pDraw)->refcnt++;
return Success;
}
int __glXDisp_CreateGLXPixmap(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateGLXPixmapReq *req = (xGLXCreateGLXPixmapReq *) pc;
return DoCreateGLXPixmap( cl, req->visual, req->screen,
req->pixmap, req->glxpixmap );
}
int __glXDisp_CreatePixmap(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreatePixmapReq *req = (xGLXCreatePixmapReq *) pc;
return DoCreateGLXPixmap( cl, req->fbconfig, req->screen,
req->pixmap, req->glxpixmap );
}
int __glXDisp_CreateGLXPixmapWithConfigSGIX(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateGLXPixmapWithConfigSGIXReq *req =
(xGLXCreateGLXPixmapWithConfigSGIXReq *) pc;
return DoCreateGLXPixmap( cl, req->fbconfig, req->screen,
req->pixmap, req->glxpixmap );
}
int DoDestroyPixmap(__GLXclientState *cl, XID glxpixmap)
{
ClientPtr client = cl->client;
/*
** Check if it's a valid GLX pixmap.
*/
if (!LookupIDByType(glxpixmap, __glXPixmapRes)) {
client->errorValue = glxpixmap;
return __glXError(GLXBadPixmap);
}
FreeResource(glxpixmap, FALSE);
return Success;
}
int __glXDisp_DestroyGLXPixmap(__GLXclientState *cl, GLbyte *pc)
{
xGLXDestroyGLXPixmapReq *req = (xGLXDestroyGLXPixmapReq *) pc;
return DoDestroyPixmap(cl, req->glxpixmap);
}
int __glXDisp_DestroyPixmap(__GLXclientState *cl, GLbyte *pc)
{
xGLXDestroyPixmapReq *req = (xGLXDestroyPixmapReq *) pc;
return DoDestroyPixmap(cl, req->glxpixmap);
}
int __glXDisp_CreatePbuffer(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreatePbufferReq *req = (xGLXCreatePbufferReq *) pc;
(void) req;
return BadRequest;
}
int __glXDisp_DestroyPbuffer(__GLXclientState *cl, GLbyte *pc)
{
xGLXDestroyPbufferReq *req = (xGLXDestroyPbufferReq *) pc;
(void) req;
return BadRequest;
}
int __glXDisp_ChangeDrawableAttributes(__GLXclientState *cl, GLbyte *pc)
{
xGLXChangeDrawableAttributesReq *req =
(xGLXChangeDrawableAttributesReq *) pc;
(void) req;
return BadRequest;
}
int __glXDisp_CreateWindow(__GLXclientState *cl, GLbyte *pc)
{
xGLXCreateWindowReq *req = (xGLXCreateWindowReq *) pc;
ClientPtr client = cl->client;
DrawablePtr pDraw;
__GLXdrawable *glxPriv;
__GLXscreen *screen;
__GLcontextModes *modes;
int retval;
retval = ValidateCreateDrawable (client, req->screen, req->fbconfig,
req->window, req->glxwindow,
DRAWABLE_WINDOW, &modes, &pDraw);
if (retval != Success)
return retval;
/* FIXME: We need to check that the window visual is compatible
* with the specified fbconfig. */
screen = __glXgetActiveScreen(req->screen);
glxPriv = screen->createDrawable(screen, pDraw, req->glxwindow, modes);
if (glxPriv == NULL)
return BadAlloc;
if (!AddResource(req->glxwindow, __glXDrawableRes, glxPriv)) {
glxPriv->destroy (glxPriv);
return BadAlloc;
}
return Success;
}
int __glXDisp_DestroyWindow(__GLXclientState *cl, GLbyte *pc)
{
xGLXDestroyWindowReq *req = (xGLXDestroyWindowReq *) pc;
ClientPtr client = cl->client;
/*
** Check if it's a valid GLX window.
*/
if (!LookupIDByType(req->glxwindow, __glXDrawableRes)) {
client->errorValue = req->glxwindow;
return __glXError(GLXBadWindow);
}
FreeResource(req->glxwindow, 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 __glXDisp_SwapBuffers(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXSwapBuffersReq *req = (xGLXSwapBuffersReq *) pc;
GLXContextTag tag = req->contextTag;
XID drawId = req->drawable;
__GLXcontext *glxc = NULL;
__GLXdrawable *pGlxDraw;
__GLXpixmap *pPixmap;
int error;
if (tag) {
glxc = __glXLookupContextByTag(cl, tag);
if (!glxc) {
return __glXError(GLXBadContextTag);
}
/*
** The calling thread is swapping its current drawable. In this case,
** glxSwapBuffers is in both GL and X streams, in terms of
** sequentiality.
*/
if (__glXForceCurrent(cl, tag, &error)) {
/*
** Do whatever is needed to make sure that all preceding requests
** in both streams are completed before the swap is executed.
*/
CALL_Finish( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(glxc);
} else {
return error;
}
}
error = GetDrawableOrPixmap(glxc, drawId, &pGlxDraw, &pPixmap, client);
if (error != Success)
return error;
if (pGlxDraw != NULL && pGlxDraw->type == DRAWABLE_WINDOW &&
(*pGlxDraw->swapBuffers)(pGlxDraw) == GL_FALSE)
return __glXError(GLXBadDrawable);
return Success;
}
int DoQueryContext(__GLXclientState *cl, GLXContextID gcId)
{
ClientPtr client = cl->client;
__GLXcontext *ctx;
xGLXQueryContextInfoEXTReply reply;
int nProps;
int *sendBuf, *pSendBuf;
int nReplyBytes;
ctx = (__GLXcontext *) LookupIDByType(gcId, __glXContextRes);
if (!ctx) {
client->errorValue = gcId;
return __glXError(GLXBadContext);
}
nProps = 3;
reply.length = nProps << 1;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.n = nProps;
nReplyBytes = reply.length << 2;
sendBuf = (int *)xalloc((size_t)nReplyBytes);
if (sendBuf == NULL) {
return __glXError(GLXBadContext); /* XXX: Is this correct? */
}
pSendBuf = sendBuf;
*pSendBuf++ = GLX_SHARE_CONTEXT_EXT;
*pSendBuf++ = (int)(ctx->share_id);
*pSendBuf++ = GLX_VISUAL_ID_EXT;
*pSendBuf++ = (int)(ctx->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);
}
xfree((char *)sendBuf);
return Success;
}
int __glXDisp_QueryContextInfoEXT(__GLXclientState *cl, GLbyte *pc)
{
xGLXQueryContextInfoEXTReq *req = (xGLXQueryContextInfoEXTReq *) pc;
return DoQueryContext(cl, req->context);
}
int __glXDisp_QueryContext(__GLXclientState *cl, GLbyte *pc)
{
xGLXQueryContextReq *req = (xGLXQueryContextReq *) pc;
return DoQueryContext(cl, req->context);
}
int __glXDisp_BindTexImageEXT(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
ClientPtr client = cl->client;
__GLXpixmap *pGlxPixmap;
__GLXcontext *context;
GLXDrawable drawId;
int buffer;
int error;
pc += __GLX_VENDPRIV_HDR_SIZE;
drawId = *((CARD32 *) (pc));
buffer = *((INT32 *) (pc + 4));
if (buffer != GLX_FRONT_LEFT_EXT)
return __glXError(GLXBadPixmap);
context = __glXForceCurrent (cl, req->contextTag, &error);
if (!context)
return error;
pGlxPixmap = (__GLXpixmap *)LookupIDByType(drawId, __glXPixmapRes);
if (!pGlxPixmap) {
client->errorValue = drawId;
return __glXError(GLXBadPixmap);
}
if (!context->textureFromPixmap)
return __glXError(GLXUnsupportedPrivateRequest);
return context->textureFromPixmap->bindTexImage(context,
buffer,
pGlxPixmap);
}
int __glXDisp_ReleaseTexImageEXT(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
ClientPtr client = cl->client;
__GLXpixmap *pGlxPixmap;
__GLXcontext *context;
GLXDrawable drawId;
int buffer;
int error;
pc += __GLX_VENDPRIV_HDR_SIZE;
drawId = *((CARD32 *) (pc));
buffer = *((INT32 *) (pc + 4));
context = __glXForceCurrent (cl, req->contextTag, &error);
if (!context)
return error;
pGlxPixmap = (__GLXpixmap *)LookupIDByType(drawId, __glXPixmapRes);
if (!pGlxPixmap) {
client->errorValue = drawId;
return __glXError(GLXBadDrawable);
}
if (!context->textureFromPixmap)
return __glXError(GLXUnsupportedPrivateRequest);
return context->textureFromPixmap->releaseTexImage(context,
buffer,
pGlxPixmap);
}
int __glXDisp_CopySubBufferMESA(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
GLXContextTag tag = req->contextTag;
__GLXcontext *glxc = NULL;
__GLXdrawable *pGlxDraw;
__GLXpixmap *pPixmap;
ClientPtr client = cl->client;
GLXDrawable drawId;
int error;
int x, y, width, height;
(void) client;
(void) req;
pc += __GLX_VENDPRIV_HDR_SIZE;
drawId = *((CARD32 *) (pc));
x = *((INT32 *) (pc + 4));
y = *((INT32 *) (pc + 8));
width = *((INT32 *) (pc + 12));
height = *((INT32 *) (pc + 16));
if (tag) {
glxc = __glXLookupContextByTag(cl, tag);
if (!glxc) {
return __glXError(GLXBadContextTag);
}
/*
** The calling thread is swapping its current drawable. In this case,
** glxSwapBuffers is in both GL and X streams, in terms of
** sequentiality.
*/
if (__glXForceCurrent(cl, tag, &error)) {
/*
** Do whatever is needed to make sure that all preceding requests
** in both streams are completed before the swap is executed.
*/
CALL_Finish( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(glxc);
} else {
return error;
}
}
error = GetDrawableOrPixmap(glxc, drawId, &pGlxDraw, &pPixmap, client);
if (error != Success)
return error;
if (pGlxDraw == NULL ||
pGlxDraw->type != DRAWABLE_WINDOW ||
pGlxDraw->copySubBuffer == NULL)
return __glXError(GLXBadDrawable);
(*pGlxDraw->copySubBuffer)(pGlxDraw, x, y, width, height);
return Success;
}
/*
** Get drawable attributes
*/
static int
DoGetDrawableAttributes(__GLXclientState *cl, XID drawId)
{
ClientPtr client = cl->client;
__GLXpixmap *glxPixmap;
xGLXGetDrawableAttributesReply reply;
CARD32 attributes[4];
int numAttribs;
glxPixmap = (__GLXpixmap *)LookupIDByType(drawId, __glXPixmapRes);
if (!glxPixmap) {
client->errorValue = drawId;
return __glXError(GLXBadPixmap);
}
numAttribs = 2;
reply.length = numAttribs << 1;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.numAttribs = numAttribs;
attributes[0] = GLX_TEXTURE_TARGET_EXT;
attributes[1] = GLX_TEXTURE_RECTANGLE_EXT;
attributes[2] = GLX_Y_INVERTED_EXT;
attributes[3] = GL_FALSE;
if (client->swapped) {
__glXSwapGetDrawableAttributesReply(client, &reply, attributes);
} else {
WriteToClient(client, sz_xGLXGetDrawableAttributesReply,
(char *)&reply);
WriteToClient(client, reply.length * sizeof (CARD32),
(char *)attributes);
}
return Success;
}
int __glXDisp_GetDrawableAttributesSGIX(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateWithReplyReq *req = (xGLXVendorPrivateWithReplyReq *)pc;
CARD32 *data;
XID drawable;
data = (CARD32 *) (req + 1);
drawable = data[0];
return DoGetDrawableAttributes(cl, drawable);
}
int __glXDisp_GetDrawableAttributes(__GLXclientState *cl, GLbyte *pc)
{
xGLXGetDrawableAttributesReq *req = (xGLXGetDrawableAttributesReq *)pc;
return DoGetDrawableAttributes(cl, req->drawable);
}
/************************************************************************/
/*
** Render and Renderlarge are not in the GLX API. They are used by the GLX
** client library to send batches of GL rendering commands.
*/
int DoRender(__GLXclientState *cl, GLbyte *pc, int do_swap)
{
xGLXRenderReq *req;
ClientPtr client= cl->client;
int left, cmdlen, error;
int commandsDone;
CARD16 opcode;
__GLXrenderHeader *hdr;
__GLXcontext *glxc;
__GLX_DECLARE_SWAP_VARIABLES;
req = (xGLXRenderReq *) pc;
if (do_swap) {
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
}
glxc = __glXForceCurrent(cl, req->contextTag, &error);
if (!glxc) {
return error;
}
commandsDone = 0;
pc += sz_xGLXRenderReq;
left = (req->length << 2) - sz_xGLXRenderReq;
while (left > 0) {
__GLXrenderSizeData entry;
int extra;
__GLXdispatchRenderProcPtr proc;
int err;
/*
** Verify that the header length and the overall length agree.
** Also, each command must be word aligned.
*/
hdr = (__GLXrenderHeader *) pc;
if (do_swap) {
__GLX_SWAP_SHORT(&hdr->length);
__GLX_SWAP_SHORT(&hdr->opcode);
}
cmdlen = hdr->length;
opcode = hdr->opcode;
/*
** Check for core opcodes and grab entry data.
*/
err = __glXGetProtocolSizeData(& Render_dispatch_info, opcode, & entry);
proc = (__GLXdispatchRenderProcPtr)
__glXGetProtocolDecodeFunction(& Render_dispatch_info, opcode, do_swap);
if ((err < 0) || (proc == NULL)) {
client->errorValue = commandsDone;
return __glXError(GLXBadRenderRequest);
}
if (entry.varsize) {
/* variable size command */
extra = (*entry.varsize)(pc + __GLX_RENDER_HDR_SIZE, do_swap);
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 all the drawing commands in a request.
*/
int __glXDisp_Render(__GLXclientState *cl, GLbyte *pc)
{
return DoRender(cl, pc, False);
}
int DoRenderLarge(__GLXclientState *cl, GLbyte *pc, int do_swap)
{
xGLXRenderLargeReq *req;
ClientPtr client= cl->client;
size_t dataBytes;
__GLXrenderLargeHeader *hdr;
__GLXcontext *glxc;
int error;
CARD16 opcode;
__GLX_DECLARE_SWAP_VARIABLES;
req = (xGLXRenderLargeReq *) pc;
if (do_swap) {
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
__GLX_SWAP_INT(&req->dataBytes);
__GLX_SWAP_SHORT(&req->requestNumber);
__GLX_SWAP_SHORT(&req->requestTotal);
}
glxc = __glXForceCurrent(cl, req->contextTag, &error);
if (!glxc) {
/* Reset in case this isn't 1st request. */
__glXResetLargeCommandStatus(cl);
return error;
}
dataBytes = req->dataBytes;
/*
** Check the request length.
*/
if ((req->length << 2) != __GLX_PAD(dataBytes) + sz_xGLXRenderLargeReq) {
client->errorValue = req->length;
/* Reset in case this isn't 1st request. */
__glXResetLargeCommandStatus(cl);
return BadLength;
}
pc += sz_xGLXRenderLargeReq;
if (cl->largeCmdRequestsSoFar == 0) {
__GLXrenderSizeData entry;
int extra;
size_t cmdlen;
int err;
/*
** This is the first request of a multi request command.
** Make enough space in the buffer, then copy the entire request.
*/
if (req->requestNumber != 1) {
client->errorValue = req->requestNumber;
return __glXError(GLXBadLargeRequest);
}
hdr = (__GLXrenderLargeHeader *) pc;
if (do_swap) {
__GLX_SWAP_INT(&hdr->length);
__GLX_SWAP_INT(&hdr->opcode);
}
cmdlen = hdr->length;
opcode = hdr->opcode;
/*
** Check for core opcodes and grab entry data.
*/
err = __glXGetProtocolSizeData(& Render_dispatch_info, opcode, & entry);
if (err < 0) {
client->errorValue = opcode;
return __glXError(GLXBadLargeRequest);
}
if (entry.varsize) {
/*
** If it's a variable-size command (a command whose length must
** be computed from its parameters), all the parameters needed
** will be in the 1st request, so it's okay to do this.
*/
extra = (*entry.varsize)(pc + __GLX_RENDER_LARGE_HDR_SIZE, do_swap);
if (extra < 0) {
extra = 0;
}
/* large command's header is 4 bytes longer, so add 4 */
if (cmdlen != __GLX_PAD(entry.bytes + 4 + extra)) {
return BadLength;
}
} else {
/* constant size command */
if (cmdlen != __GLX_PAD(entry.bytes + 4)) {
return BadLength;
}
}
/*
** Make enough space in the buffer, then copy the entire request.
*/
if (cl->largeCmdBufSize < cmdlen) {
if (!cl->largeCmdBuf) {
cl->largeCmdBuf = (GLbyte *) xalloc(cmdlen);
} else {
cl->largeCmdBuf = (GLbyte *) xrealloc(cl->largeCmdBuf, cmdlen);
}
if (!cl->largeCmdBuf) {
return BadAlloc;
}
cl->largeCmdBufSize = cmdlen;
}
memcpy(cl->largeCmdBuf, pc, dataBytes);
cl->largeCmdBytesSoFar = dataBytes;
cl->largeCmdBytesTotal = cmdlen;
cl->largeCmdRequestsSoFar = 1;
cl->largeCmdRequestsTotal = req->requestTotal;
return Success;
} else {
/*
** We are receiving subsequent (i.e. not the first) requests of a
** multi request command.
*/
/*
** Check the request number and the total request count.
*/
if (req->requestNumber != cl->largeCmdRequestsSoFar + 1) {
client->errorValue = req->requestNumber;
__glXResetLargeCommandStatus(cl);
return __glXError(GLXBadLargeRequest);
}
if (req->requestTotal != cl->largeCmdRequestsTotal) {
client->errorValue = req->requestTotal;
__glXResetLargeCommandStatus(cl);
return __glXError(GLXBadLargeRequest);
}
/*
** Check that we didn't get too much data.
*/
if ((cl->largeCmdBytesSoFar + dataBytes) > cl->largeCmdBytesTotal) {
client->errorValue = dataBytes;
__glXResetLargeCommandStatus(cl);
return __glXError(GLXBadLargeRequest);
}
memcpy(cl->largeCmdBuf + cl->largeCmdBytesSoFar, pc, dataBytes);
cl->largeCmdBytesSoFar += dataBytes;
cl->largeCmdRequestsSoFar++;
if (req->requestNumber == cl->largeCmdRequestsTotal) {
__GLXdispatchRenderProcPtr proc;
/*
** This is the last request; it must have enough bytes to complete
** the command.
*/
/* NOTE: the two pad macros have been added below; they are needed
** because the client library pads the total byte count, but not
** the per-request byte counts. The Protocol Encoding says the
** total byte count should not be padded, so a proposal will be
** made to the ARB to relax the padding constraint on the total
** byte count, thus preserving backward compatibility. Meanwhile,
** the padding done below fixes a bug that did not allow
** large commands of odd sizes to be accepted by the server.
*/
if (__GLX_PAD(cl->largeCmdBytesSoFar) !=
__GLX_PAD(cl->largeCmdBytesTotal)) {
client->errorValue = dataBytes;
__glXResetLargeCommandStatus(cl);
return __glXError(GLXBadLargeRequest);
}
hdr = (__GLXrenderLargeHeader *) cl->largeCmdBuf;
/*
** The opcode and length field in the header had already been
** swapped when the first request was received.
**
** Use the opcode to index into the procedure table.
*/
opcode = hdr->opcode;
proc = (__GLXdispatchRenderProcPtr)
__glXGetProtocolDecodeFunction(& Render_dispatch_info, opcode, do_swap);
if (proc == NULL) {
client->errorValue = opcode;
return __glXError(GLXBadLargeRequest);
}
/*
** Skip over the header and execute the command.
*/
(*proc)(cl->largeCmdBuf + __GLX_RENDER_LARGE_HDR_SIZE);
__GLX_NOTE_UNFLUSHED_CMDS(glxc);
/*
** Reset for the next RenderLarge series.
*/
__glXResetLargeCommandStatus(cl);
} else {
/*
** This is neither the first nor the last request.
*/
}
return Success;
}
}
/*
** Execute a large rendering request (one that spans multiple X requests).
*/
int __glXDisp_RenderLarge(__GLXclientState *cl, GLbyte *pc)
{
return DoRenderLarge(cl, pc, False);
}
extern RESTYPE __glXSwapBarrierRes;
int __glXDisp_BindSwapBarrierSGIX(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXBindSwapBarrierSGIXReq *req = (xGLXBindSwapBarrierSGIXReq *) pc;
XID drawable = req->drawable;
int barrier = req->barrier;
DrawablePtr pDraw;
int screen, rc;
rc = dixLookupDrawable(&pDraw, drawable, client, 0, DixUnknownAccess);
if (rc == Success && (pDraw->type == DRAWABLE_WINDOW)) {
screen = pDraw->pScreen->myNum;
if (__glXSwapBarrierFuncs &&
__glXSwapBarrierFuncs[screen].bindSwapBarrierFunc) {
int ret = __glXSwapBarrierFuncs[screen].bindSwapBarrierFunc(screen, drawable, barrier);
if (ret == Success) {
if (barrier)
/* add source for cleanup when drawable is gone */
AddResource(drawable, __glXSwapBarrierRes, (pointer)screen);
else
/* delete source */
FreeResourceByType(drawable, __glXSwapBarrierRes, FALSE);
}
return ret;
}
}
client->errorValue = drawable;
return __glXError(GLXBadDrawable);
}
int __glXDisp_QueryMaxSwapBarriersSGIX(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryMaxSwapBarriersSGIXReq *req =
(xGLXQueryMaxSwapBarriersSGIXReq *) pc;
xGLXQueryMaxSwapBarriersSGIXReply reply;
int screen = req->screen;
if (__glXSwapBarrierFuncs &&
__glXSwapBarrierFuncs[screen].queryMaxSwapBarriersFunc)
reply.max = __glXSwapBarrierFuncs[screen].queryMaxSwapBarriersFunc(screen);
else
reply.max = 0;
reply.length = 0;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
if (client->swapped) {
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply.sequenceNumber);
}
WriteToClient(client, sz_xGLXQueryMaxSwapBarriersSGIXReply,
(char *) &reply);
return Success;
}
#define GLX_BAD_HYPERPIPE_SGIX 92
int __glXDisp_QueryHyperpipeNetworkSGIX(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryHyperpipeNetworkSGIXReq * req = (xGLXQueryHyperpipeNetworkSGIXReq *) pc;
xGLXQueryHyperpipeNetworkSGIXReply reply;
int screen = req->screen;
void *rdata = NULL;
int length=0;
int npipes=0;
int n= 0;
if (__glXHyperpipeFuncs &&
__glXHyperpipeFuncs[screen].queryHyperpipeNetworkFunc != NULL) {
rdata =
(__glXHyperpipeFuncs[screen].queryHyperpipeNetworkFunc(screen, &npipes, &n));
}
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
reply.npipes = npipes;
if (client->swapped) {
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.length);
__GLX_SWAP_INT(&reply.n);
__GLX_SWAP_INT(&reply.npipes);
}
WriteToClient(client, sz_xGLXQueryHyperpipeNetworkSGIXReply,
(char *) &reply);
WriteToClient(client, length << 2, (char *)rdata);
return Success;
}
int __glXDisp_DestroyHyperpipeConfigSGIX (__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXDestroyHyperpipeConfigSGIXReq * req =
(xGLXDestroyHyperpipeConfigSGIXReq *) pc;
xGLXDestroyHyperpipeConfigSGIXReply reply;
int screen = req->screen;
int success = GLX_BAD_HYPERPIPE_SGIX;
int hpId ;
hpId = req->hpId;
if (__glXHyperpipeFuncs &&
__glXHyperpipeFuncs[screen].destroyHyperpipeConfigFunc != NULL) {
success = __glXHyperpipeFuncs[screen].destroyHyperpipeConfigFunc(screen, hpId);
}
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = __GLX_PAD(0) >> 2;
reply.n = 0;
reply.success = success;
if (client->swapped) {
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply.sequenceNumber);
}
WriteToClient(client,
sz_xGLXDestroyHyperpipeConfigSGIXReply,
(char *) &reply);
return Success;
}
int __glXDisp_QueryHyperpipeConfigSGIX(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryHyperpipeConfigSGIXReq * req =
(xGLXQueryHyperpipeConfigSGIXReq *) pc;
xGLXQueryHyperpipeConfigSGIXReply reply;
int screen = req->screen;
void *rdata = NULL;
int length;
int npipes=0;
int n= 0;
int hpId;
hpId = req->hpId;
if (__glXHyperpipeFuncs &&
__glXHyperpipeFuncs[screen].queryHyperpipeConfigFunc != NULL) {
rdata = __glXHyperpipeFuncs[screen].queryHyperpipeConfigFunc(screen, hpId,&npipes, &n);
}
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
reply.npipes = npipes;
if (client->swapped) {
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.length);
__GLX_SWAP_INT(&reply.n);
__GLX_SWAP_INT(&reply.npipes);
}
WriteToClient(client, sz_xGLXQueryHyperpipeConfigSGIXReply,
(char *) &reply);
WriteToClient(client, length << 2, (char *)rdata);
return Success;
}
int __glXDisp_HyperpipeConfigSGIX(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXHyperpipeConfigSGIXReq * req =
(xGLXHyperpipeConfigSGIXReq *) pc;
xGLXHyperpipeConfigSGIXReply reply;
int screen = req->screen;
void *rdata;
int npipes=0, networkId;
int hpId=-1;
networkId = (int)req->networkId;
npipes = (int)req->npipes;
rdata = (void *)(req +1);
if (__glXHyperpipeFuncs &&
__glXHyperpipeFuncs[screen].hyperpipeConfigFunc != NULL) {
__glXHyperpipeFuncs[screen].hyperpipeConfigFunc(screen,networkId,
&hpId, &npipes,
(void *) rdata);
}
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = __GLX_PAD(0) >> 2;
reply.n = 0;
reply.npipes = npipes;
reply.hpId = hpId;
if (client->swapped) {
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.npipes);
__GLX_SWAP_INT(&reply.hpId);
}
WriteToClient(client, sz_xGLXHyperpipeConfigSGIXReply,
(char *) &reply);
return Success;
}
/************************************************************************/
/*
** No support is provided for the vendor-private requests other than
** allocating the entry points in the dispatch table.
*/
int __glXDisp_VendorPrivate(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
GLint vendorcode = req->vendorCode;
__GLXdispatchVendorPrivProcPtr proc;
proc = (__GLXdispatchVendorPrivProcPtr)
__glXGetProtocolDecodeFunction(& VendorPriv_dispatch_info,
vendorcode, 0);
if (proc != NULL) {
(*proc)(cl, (GLbyte*)req);
return Success;
}
cl->client->errorValue = req->vendorCode;
return __glXError(GLXUnsupportedPrivateRequest);
}
int __glXDisp_VendorPrivateWithReply(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req = (xGLXVendorPrivateReq *) pc;
GLint vendorcode = req->vendorCode;
__GLXdispatchVendorPrivProcPtr proc;
proc = (__GLXdispatchVendorPrivProcPtr)
__glXGetProtocolDecodeFunction(& VendorPriv_dispatch_info,
vendorcode, 0);
if (proc != NULL) {
return (*proc)(cl, (GLbyte*)req);
}
cl->client->errorValue = vendorcode;
return __glXError(GLXUnsupportedPrivateRequest);
}
int __glXDisp_QueryExtensionsString(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryExtensionsStringReq *req = (xGLXQueryExtensionsStringReq *) pc;
xGLXQueryExtensionsStringReply reply;
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 = strlen(ptr) + 1;
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
/* Allocate buffer to make sure it's a multiple of 4 bytes big.*/
buf = (char *) xalloc(length << 2);
if (buf == NULL)
return BadAlloc;
memcpy(buf, ptr, n);
if (client->swapped) {
glxSwapQueryExtensionsStringReply(client, &reply, buf);
} else {
WriteToClient(client, sz_xGLXQueryExtensionsStringReply,(char *)&reply);
WriteToClient(client, (int)(length << 2), (char *)buf);
}
xfree(buf);
return Success;
}
int __glXDisp_QueryServerString(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXQueryServerStringReq *req = (xGLXQueryServerStringReq *) pc;
xGLXQueryServerStringReply reply;
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 = strlen(ptr) + 1;
length = __GLX_PAD(n) >> 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = length;
reply.n = n;
buf = (char *) xalloc(length << 2);
if (buf == NULL) {
return BadAlloc;
}
memcpy(buf, ptr, n);
if (client->swapped) {
glxSwapQueryServerStringReply(client, &reply, buf);
} else {
WriteToClient(client, sz_xGLXQueryServerStringReply, (char *)&reply);
WriteToClient(client, (int)(length << 2), buf);
}
xfree(buf);
return Success;
}
int __glXDisp_ClientInfo(__GLXclientState *cl, GLbyte *pc)
{
xGLXClientInfoReq *req = (xGLXClientInfoReq *) pc;
const char *buf;
cl->GLClientmajorVersion = req->major;
cl->GLClientminorVersion = req->minor;
if (cl->GLClientextensions)
xfree(cl->GLClientextensions);
buf = (const char *)(req+1);
cl->GLClientextensions = xstrdup(buf);
return Success;
}
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