/*
** The contents of this file are subject to the GLX Public License Version 1.0
** (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, 2011 N. Shoreline Blvd., Mountain View, CA 94043
** or at http://www.sgi.com/software/opensource/glx/license.html.
**
** Software distributed under the License is distributed on an "AS IS"
** basis. ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY
** IMPLIED WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
** PURPOSE OR OF NON- INFRINGEMENT. See the License for the specific
** language governing rights and limitations under the License.
**
** The Original Software is GLX version 1.2 source code, released February,
** 1999. The developer of the Original Software is Silicon Graphics, Inc.
** Those portions of the Subject Software created by Silicon Graphics, Inc.
** are Copyright (c) 1991-9 Silicon Graphics, Inc. All Rights Reserved.
**
*/
#define NEED_REPLIES
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <string.h>
#include "glxserver.h"
#include <windowstr.h>
#include <propertyst.h>
#include <os.h>
#include "g_disptab.h"
#include "unpack.h"
#include "glxutil.h"
#include "glxext.h"
#include "indirect_table.h"
#include "indirect_util.h"
/*
** The last context used by the server. It is the context that is current
** from the server's perspective.
*/
__GLXcontext *__glXLastContext;
/*
** X resources.
*/
RESTYPE __glXContextRes;
RESTYPE __glXClientRes;
RESTYPE __glXPixmapRes;
RESTYPE __glXDrawableRes;
RESTYPE __glXSwapBarrierRes;
/*
** Reply for most singles.
*/
xGLXSingleReply __glXReply;
/*
** A set of state for each client. The 0th one is unused because client
** indices start at 1, not 0.
*/
static __GLXclientState *__glXClients[MAXCLIENTS + 1];
/*
** Client that called into GLX dispatch.
*/
ClientPtr __pGlxClient;
/*
** Forward declarations.
*/
static int __glXDispatch(ClientPtr);
/*
** Called when the extension is reset.
*/
static void ResetExtension(ExtensionEntry* extEntry)
{
__glXFlushContextCache();
__glXResetScreens();
}
/*
** Initialize the per-client context storage.
*/
static void ResetClientState(int clientIndex)
{
__GLXclientState *cl = __glXClients[clientIndex];
if (cl->returnBuf) xfree(cl->returnBuf);
if (cl->largeCmdBuf) xfree(cl->largeCmdBuf);
if (cl->currentContexts) xfree(cl->currentContexts);
memset(cl, 0, sizeof(__GLXclientState));
/*
** By default, assume that the client supports
** GLX major version 1 minor version 0 protocol.
*/
cl->GLClientmajorVersion = 1;
cl->GLClientminorVersion = 0;
if (cl->GLClientextensions)
xfree(cl->GLClientextensions);
}
/*
** Reset state used to keep track of large (multi-request) commands.
*/
void __glXResetLargeCommandStatus(__GLXclientState *cl)
{
cl->largeCmdBytesSoFar = 0;
cl->largeCmdBytesTotal = 0;
cl->largeCmdRequestsSoFar = 0;
cl->largeCmdRequestsTotal = 0;
}
/*
** This procedure is called when the client who created the context goes
** away OR when glXDestroyContext is called. In either case, all we do is
** flag that the ID is no longer valid, and (maybe) free the context.
** use.
*/
static int ContextGone(__GLXcontext* cx, XID id)
{
cx->idExists = GL_FALSE;
if (!cx->isCurrent) {
__glXFreeContext(cx);
}
return True;
}
/*
** Free a client's state.
*/
static int ClientGone(int clientIndex, XID id)
{
__GLXcontext *cx;
__GLXclientState *cl = __glXClients[clientIndex];
int i;
if (cl) {
/*
** Free all the contexts that are current for this client.
*/
for (i=0; i < cl->numCurrentContexts; i++) {
cx = cl->currentContexts[i];
if (cx) {
__glXDeassociateContext(cx);
cx->isCurrent = GL_FALSE;
if (!cx->idExists) {
__glXFreeContext(cx);
}
}
}
/*
** Re-initialize the client state structure. Don't free it because
** we'll probably get another client with this index and use the struct
** again. There is a maximum of MAXCLIENTS of these structures.
*/
ResetClientState(clientIndex);
}
return True;
}
/*
** Free a GLX Pixmap.
*/
static int PixmapGone(__GLXpixmap *pGlxPixmap, XID id)
{
PixmapPtr pPixmap = (PixmapPtr) pGlxPixmap->pDraw;
pGlxPixmap->idExists = False;
if (!pGlxPixmap->refcnt) {
#ifdef XF86DRI
if (pGlxPixmap->pDamage) {
DamageUnregister (pGlxPixmap->pDraw, pGlxPixmap->pDamage);
DamageDestroy(pGlxPixmap->pDamage);
}
#endif
/*
** The DestroyPixmap routine should decrement the refcount and free
** only if it's zero.
*/
(*pGlxPixmap->pScreen->DestroyPixmap)(pPixmap);
xfree(pGlxPixmap);
}
return True;
}
/*
** Destroy routine that gets called when a drawable is freed. A drawable
** contains the ancillary buffers needed for rendering.
*/
static Bool DrawableGone(__GLXdrawable *glxPriv, XID xid)
{
__GLXcontext *cx, *cx1;
/*
** Use glxPriv->type to figure out what kind of drawable this is. Don't
** use glxPriv->pDraw->type because by the time this routine is called,
** the pDraw might already have been freed.
*/
if (glxPriv->type == DRAWABLE_WINDOW) {
/*
** When a window is destroyed, notify all context bound to
** it, that there are no longer bound to anything.
*/
for (cx = glxPriv->drawGlxc; cx; cx = cx1) {
cx1 = cx->nextDrawPriv;
cx->pendingState |= __GLX_PENDING_DESTROY;
}
for (cx = glxPriv->readGlxc; cx; cx = cx1) {
cx1 = cx->nextReadPriv;
cx->pendingState |= __GLX_PENDING_DESTROY;
}
}
__glXUnrefDrawable(glxPriv);
return True;
}
static __GLXcontext *glxPendingDestroyContexts;
static int glxServerLeaveCount;
static int glxBlockClients;
/*
** Free a context.
*/
GLboolean __glXFreeContext(__GLXcontext *cx)
{
if (cx->idExists || cx->isCurrent) return GL_FALSE;
if (cx->feedbackBuf) xfree(cx->feedbackBuf);
if (cx->selectBuf) xfree(cx->selectBuf);
if (cx == __glXLastContext) {
__glXFlushContextCache();
}
/* We can get here through both regular dispatching from
* __glXDispatch() or as a callback from the resource manager. In
* the latter case we need to lift the DRI lock manually. */
if (!glxBlockClients) {
__glXleaveServer(GL_FALSE);
cx->destroy(cx);
__glXenterServer(GL_FALSE);
} else {
cx->next = glxPendingDestroyContexts;
glxPendingDestroyContexts = cx;
}
return GL_TRUE;
}
extern RESTYPE __glXSwapBarrierRes;
static int SwapBarrierGone(int screen, XID drawable)
{
if (__glXSwapBarrierFuncs &&
__glXSwapBarrierFuncs[screen].bindSwapBarrierFunc != NULL) {
__glXSwapBarrierFuncs[screen].bindSwapBarrierFunc(screen, drawable, 0);
}
FreeResourceByType(drawable, __glXSwapBarrierRes, FALSE);
return True;
}
/************************************************************************/
/*
** These routines can be used to check whether a particular GL command
** has caused an error. Specifically, we use them to check whether a
** given query has caused an error, in which case a zero-length data
** reply is sent to the client.
*/
static GLboolean errorOccured = GL_FALSE;
/*
** The GL was will call this routine if an error occurs.
*/
void __glXErrorCallBack(GLenum code)
{
errorOccured = GL_TRUE;
}
/*
** Clear the error flag before calling the GL command.
*/
void __glXClearErrorOccured(void)
{
errorOccured = GL_FALSE;
}
/*
** Check if the GL command caused an error.
*/
GLboolean __glXErrorOccured(void)
{
return errorOccured;
}
static int __glXErrorBase;
int __glXError(int error)
{
return __glXErrorBase + error;
}
/************************************************************************/
/*
** Initialize the GLX extension.
*/
void GlxExtensionInit(void)
{
ExtensionEntry *extEntry;
int i;
__glXContextRes = CreateNewResourceType((DeleteType)ContextGone);
__glXClientRes = CreateNewResourceType((DeleteType)ClientGone);
__glXPixmapRes = CreateNewResourceType((DeleteType)PixmapGone);
__glXDrawableRes = CreateNewResourceType((DeleteType)DrawableGone);
__glXSwapBarrierRes = CreateNewResourceType((DeleteType)SwapBarrierGone);
/*
** Add extension to server extensions.
*/
extEntry = AddExtension(GLX_EXTENSION_NAME, __GLX_NUMBER_EVENTS,
__GLX_NUMBER_ERRORS, __glXDispatch,
__glXDispatch, ResetExtension,
StandardMinorOpcode);
if (!extEntry) {
FatalError("__glXExtensionInit: AddExtensions failed\n");
return;
}
if (!AddExtensionAlias(GLX_EXTENSION_ALIAS, extEntry)) {
ErrorF("__glXExtensionInit: AddExtensionAlias failed\n");
return;
}
__glXErrorBase = extEntry->errorBase;
/*
** Initialize table of client state. There is never a client 0.
*/
for (i = 1; i <= MAXCLIENTS; i++) {
__glXClients[i] = 0;
}
/*
** Initialize screen specific data.
*/
__glXInitScreens();
}
/************************************************************************/
void __glXFlushContextCache(void)
{
__glXLastContext = 0;
}
/*
** Make a context the current one for the GL (in this implementation, there
** is only one instance of the GL, and we use it to serve all GL clients by
** switching it between different contexts). While we are at it, look up
** a context by its tag and return its (__GLXcontext *).
*/
__GLXcontext *__glXForceCurrent(__GLXclientState *cl, GLXContextTag tag,
int *error)
{
__GLXcontext *cx;
/*
** See if the context tag is legal; it is managed by the extension,
** so if it's invalid, we have an implementation error.
*/
cx = (__GLXcontext *) __glXLookupContextByTag(cl, tag);
if (!cx) {
cl->client->errorValue = tag;
*error = __glXError(GLXBadContextTag);
return 0;
}
if (!cx->isDirect) {
if (cx->drawPriv == NULL) {
/*
** The drawable has vanished. It must be a window, because only
** windows can be destroyed from under us; GLX pixmaps are
** refcounted and don't go away until no one is using them.
*/
*error = __glXError(GLXBadCurrentWindow);
return 0;
}
}
if (cx == __glXLastContext) {
/* No need to re-bind */
return cx;
}
/* Make this context the current one for the GL. */
if (!cx->isDirect) {
if (!(*cx->forceCurrent)(cx)) {
/* Bind failed, and set the error code. Bummer */
cl->client->errorValue = cx->id;
*error = __glXError(GLXBadContextState);
return 0;
}
}
__glXLastContext = cx;
return cx;
}
/************************************************************************/
void glxSuspendClients(void)
{
int i;
for (i = 1; i <= MAXCLIENTS; i++) {
if (__glXClients[i] == NULL || !__glXClients[i]->inUse)
continue;
IgnoreClient(__glXClients[i]->client);
}
glxBlockClients = TRUE;
}
void glxResumeClients(void)
{
__GLXcontext *cx, *next;
int i;
glxBlockClients = FALSE;
for (i = 1; i <= MAXCLIENTS; i++) {
if (__glXClients[i] == NULL || !__glXClients[i]->inUse)
continue;
AttendClient(__glXClients[i]->client);
}
__glXleaveServer(GL_FALSE);
for (cx = glxPendingDestroyContexts; cx != NULL; cx = next) {
next = cx->next;
cx->destroy(cx);
}
glxPendingDestroyContexts = NULL;
__glXenterServer(GL_FALSE);
}
static void
__glXnopEnterServer(GLboolean rendering)
{
}
static void
__glXnopLeaveServer(GLboolean rendering)
{
}
static void (*__glXenterServerFunc)(GLboolean) = __glXnopEnterServer;
static void (*__glXleaveServerFunc)(GLboolean) = __glXnopLeaveServer;
void __glXsetEnterLeaveServerFuncs(void (*enter)(GLboolean),
void (*leave)(GLboolean))
{
__glXenterServerFunc = enter;
__glXleaveServerFunc = leave;
}
void __glXenterServer(GLboolean rendering)
{
glxServerLeaveCount--;
if (glxServerLeaveCount == 0)
(*__glXenterServerFunc)(rendering);
}
void __glXleaveServer(GLboolean rendering)
{
if (glxServerLeaveCount == 0)
(*__glXleaveServerFunc)(rendering);
glxServerLeaveCount++;
}
/*
** Top level dispatcher; all commands are executed from here down.
*/
static int __glXDispatch(ClientPtr client)
{
REQUEST(xGLXSingleReq);
CARD8 opcode;
__GLXdispatchSingleProcPtr proc;
__GLXclientState *cl;
int retval;
opcode = stuff->glxCode;
cl = __glXClients[client->index];
if (!cl) {
cl = (__GLXclientState *) xalloc(sizeof(__GLXclientState));
__glXClients[client->index] = cl;
if (!cl) {
return BadAlloc;
}
memset(cl, 0, sizeof(__GLXclientState));
}
if (!cl->inUse) {
/*
** This is first request from this client. Associate a resource
** with the client so we will be notified when the client dies.
*/
XID xid = FakeClientID(client->index);
if (!AddResource( xid, __glXClientRes, (pointer)(long)client->index)) {
return BadAlloc;
}
ResetClientState(client->index);
cl->inUse = GL_TRUE;
cl->client = client;
}
/*
** If we're expecting a glXRenderLarge request, this better be one.
*/
if ((cl->largeCmdRequestsSoFar != 0) && (opcode != X_GLXRenderLarge)) {
client->errorValue = stuff->glxCode;
return __glXError(GLXBadLargeRequest);
}
/* If we're currently blocking GLX clients, just put this guy to
* sleep, reset the request and return. */
if (glxBlockClients) {
ResetCurrentRequest(client);
client->sequence--;
IgnoreClient(client);
return(client->noClientException);
}
/*
** Use the opcode to index into the procedure table.
*/
proc = (__GLXdispatchSingleProcPtr) __glXGetProtocolDecodeFunction(& Single_dispatch_info,
opcode,
client->swapped);
if (proc != NULL) {
GLboolean rendering = opcode <= X_GLXRenderLarge;
__glXleaveServer(rendering);
__pGlxClient = client;
retval = (*proc)(cl, (GLbyte *) stuff);
__glXenterServer(rendering);
}
else {
retval = BadRequest;
}
return retval;
}
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