diff options
Diffstat (limited to 'glx/single2.c')
| -rw-r--r-- | glx/single2.c | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/glx/single2.c b/glx/single2.c new file mode 100644 index 0000000..07b89a8 --- /dev/null +++ b/glx/single2.c @@ -0,0 +1,386 @@ +/* + * 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> +#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) ); + __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 *) 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) ); + __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 *) 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); +} |