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xserver/GL/glx/single2.c

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/* $XFree86: xc/programs/Xserver/GL/glx/single2.c,v 1.8 2004/02/10 22:54:15 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
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "glxserver.h"
#include "glxutil.h"
#include "glxext.h"
#include "indirect_dispatch.h"
#include "unpack.h"
#include "glapitable.h"
#include "glapi.h"
#include "glthread.h"
#include "dispatch.h"
int __glXDisp_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
{
GLsizei size;
GLenum type;
__GLXcontext *cx;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
size = *(GLsizei *)(pc+0);
type = *(GLenum *)(pc+4);
if (cx->feedbackBufSize < size) {
cx->feedbackBuf = (GLfloat *) xrealloc(cx->feedbackBuf,
(size_t)size
* __GLX_SIZE_FLOAT32);
if (!cx->feedbackBuf) {
cl->client->errorValue = size;
return BadAlloc;
}
cx->feedbackBufSize = size;
}
CALL_FeedbackBuffer( GET_DISPATCH(), (size, type, cx->feedbackBuf) );
__GLX_NOTE_UNFLUSHED_CMDS(cx);
return Success;
}
int __glXDisp_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
{
__GLXcontext *cx;
GLsizei size;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
size = *(GLsizei *)(pc+0);
if (cx->selectBufSize < size) {
cx->selectBuf = (GLuint *) xrealloc(cx->selectBuf,
(size_t) size
* __GLX_SIZE_CARD32);
if (!cx->selectBuf) {
cl->client->errorValue = size;
return BadAlloc;
}
cx->selectBufSize = size;
}
CALL_SelectBuffer( GET_DISPATCH(), (size, cx->selectBuf) );
__GLX_NOTE_UNFLUSHED_CMDS(cx);
return Success;
}
int __glXDisp_RenderMode(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client;
xGLXRenderModeReply reply;
__GLXcontext *cx;
GLint nitems=0, retBytes=0, retval, newModeCheck;
GLubyte *retBuffer = NULL;
GLenum newMode;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
newMode = *(GLenum*) pc;
retval = CALL_RenderMode( GET_DISPATCH(), (newMode) );
/* Check that render mode worked */
CALL_GetIntegerv( GET_DISPATCH(), (GL_RENDER_MODE, &newModeCheck) );
if (newModeCheck != newMode) {
/* Render mode change failed. Bail */
newMode = newModeCheck;
goto noChangeAllowed;
}
/*
** Render mode might have still failed if we get here. But in this
** case we can't really tell, nor does it matter. If it did fail, it
** will return 0, and thus we won't send any data across the wire.
*/
switch (cx->renderMode) {
case GL_RENDER:
cx->renderMode = newMode;
break;
case GL_FEEDBACK:
if (retval < 0) {
/* Overflow happened. Copy the entire buffer */
nitems = cx->feedbackBufSize;
} else {
nitems = retval;
}
retBytes = nitems * __GLX_SIZE_FLOAT32;
retBuffer = (GLubyte*) cx->feedbackBuf;
cx->renderMode = newMode;
break;
case GL_SELECT:
if (retval < 0) {
/* Overflow happened. Copy the entire buffer */
nitems = cx->selectBufSize;
} else {
GLuint *bp = cx->selectBuf;
GLint i;
/*
** Figure out how many bytes of data need to be sent. Parse
** the selection buffer to determine this fact as the
** return value is the number of hits, not the number of
** items in the buffer.
*/
nitems = 0;
i = retval;
while (--i >= 0) {
GLuint n;
/* Parse select data for this hit */
n = *bp;
bp += 3 + n;
}
nitems = bp - cx->selectBuf;
}
retBytes = nitems * __GLX_SIZE_CARD32;
retBuffer = (GLubyte*) cx->selectBuf;
cx->renderMode = newMode;
break;
}
/*
** First reply is the number of elements returned in the feedback or
** selection array, as per the API for glRenderMode itself.
*/
noChangeAllowed:;
client = cl->client;
reply.length = nitems;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.retval = retval;
reply.size = nitems;
reply.newMode = newMode;
WriteToClient(client, sz_xGLXRenderModeReply, (char *)&reply);
if (retBytes) {
WriteToClient(client, retBytes, (char *)retBuffer);
}
return Success;
}
int __glXDisp_Flush(__GLXclientState *cl, GLbyte *pc)
{
__GLXcontext *cx;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
CALL_Flush( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(cx);
return Success;
}
int __glXDisp_Finish(__GLXclientState *cl, GLbyte *pc)
{
__GLXcontext *cx;
ClientPtr client;
int error;
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
/* Do a local glFinish */
CALL_Finish( GET_DISPATCH(), () );
__GLX_NOTE_FLUSHED_CMDS(cx);
/* Send empty reply packet to indicate finish is finished */
client = cl->client;
__GLX_BEGIN_REPLY(0);
__GLX_SEND_HEADER();
return Success;
}
#define SEPARATOR " "
char *__glXcombine_strings(const char *cext_string, const char *sext_string)
{
size_t clen, slen;
char *combo_string, *token, *s1;
const char *s2, *end;
/* safeguard to prevent potentially fatal errors in the string functions */
if (!cext_string)
cext_string = "";
if (!sext_string)
sext_string = "";
/*
** String can't be longer than min(cstring, sstring)
** pull tokens out of shortest string
** include space in combo_string for final separator and null terminator
*/
clen = strlen(cext_string);
slen = strlen(sext_string);
if (clen > slen) {
combo_string = (char *) xalloc(slen + 2);
s1 = (char *) xalloc(slen + 2);
if (s1) strcpy(s1, sext_string);
s2 = cext_string;
} else {
combo_string = (char *) xalloc(clen + 2);
s1 = (char *) xalloc(clen + 2);
if (s1) strcpy(s1, cext_string);
s2 = sext_string;
}
if (!combo_string || !s1) {
if (combo_string)
xfree(combo_string);
if (s1)
xfree(s1);
return NULL;
}
combo_string[0] = '\0';
/* Get first extension token */
token = strtok( s1, SEPARATOR);
while ( token != NULL ) {
/*
** if token in second string then save it
** beware of extension names which are prefixes of other extension names
*/
const char *p = s2;
end = p + strlen(p);
while (p < end) {
size_t n = strcspn(p, SEPARATOR);
if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) {
combo_string = strcat(combo_string, token);
combo_string = strcat(combo_string, SEPARATOR);
}
p += (n + 1);
}
/* Get next extension token */
token = strtok( NULL, SEPARATOR);
}
xfree(s1);
return combo_string;
}
int DoGetString(__GLXclientState *cl, GLbyte *pc, GLboolean need_swap)
{
ClientPtr client;
__GLXcontext *cx;
GLenum name;
const char *string;
__GLX_DECLARE_SWAP_VARIABLES;
int error;
char *buf = NULL, *buf1 = NULL;
GLint length = 0;
/* If the client has the opposite byte order, swap the contextTag and
* the name.
*/
if ( need_swap ) {
__GLX_SWAP_INT(pc + 4);
__GLX_SWAP_INT(pc + __GLX_SINGLE_HDR_SIZE);
}
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
name = *(GLenum *)(pc + 0);
string = (const char *) CALL_GetString( GET_DISPATCH(), (name) );
client = cl->client;
/*
** Restrict extensions to those that are supported by both the
** implementation and the connection. That is, return the
** intersection of client, server, and core extension strings.
*/
if (name == GL_EXTENSIONS) {
buf1 = __glXcombine_strings(string,
cl->GLClientextensions);
buf = __glXcombine_strings(buf1,
cx->pGlxScreen->GLextensions);
if (buf1 != NULL) {
xfree(buf1);
}
string = buf;
}
else if ( name == GL_VERSION ) {
if ( atof( string ) > atof( GLServerVersion ) ) {
buf = xalloc( strlen( string ) + strlen( GLServerVersion ) + 4 );
if ( buf == NULL ) {
string = GLServerVersion;
}
else {
sprintf( buf, "%s (%s)", GLServerVersion, string );
string = buf;
}
}
}
if (string) {
length = strlen((const char *) string) + 1;
}
__GLX_BEGIN_REPLY(length);
__GLX_PUT_SIZE(length);
if ( need_swap ) {
__GLX_SWAP_REPLY_SIZE();
__GLX_SWAP_REPLY_HEADER();
}
__GLX_SEND_HEADER();
WriteToClient(client, length, (char *) string);
if (buf != NULL)
xfree(buf);
return Success;
}
int __glXDisp_GetString(__GLXclientState *cl, GLbyte *pc)
{
return DoGetString(cl, pc, GL_FALSE);
}
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