/* * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice including the dates of first publication and * either this permission notice or a reference to * http://oss.sgi.com/projects/FreeB/ * shall be included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Except as contained in this notice, the name of Silicon Graphics, Inc. * shall not be used in advertising or otherwise to promote the sale, use or * other dealings in this Software without prior written authorization from * Silicon Graphics, Inc. */ #ifdef HAVE_DIX_CONFIG_H #include <dix-config.h> #else #include "glheader.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 *) realloc(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) ); cx->hasUnflushedCommands = GL_TRUE; 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 *) realloc(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) ); cx->hasUnflushedCommands = GL_TRUE; 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(), () ); cx->hasUnflushedCommands = GL_FALSE; 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(), () ); cx->hasUnflushedCommands = GL_FALSE; /* 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 *) malloc(slen + 2); s1 = (char *) malloc(slen + 2); if (s1) strcpy(s1, sext_string); s2 = cext_string; } else { combo_string = (char *) malloc(clen + 2); s1 = (char *) malloc(clen + 2); if (s1) strcpy(s1, cext_string); s2 = sext_string; } if (!combo_string || !s1) { free(combo_string); free(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); } free(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; if (string == NULL) string = ""; /* ** 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); free(buf1); string = buf; } else if ( name == GL_VERSION ) { if ( atof( string ) > atof( GLServerVersion ) ) { buf = malloc( 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); free(buf); return Success; } int __glXDisp_GetString(__GLXclientState *cl, GLbyte *pc) { return DoGetString(cl, pc, GL_FALSE); }