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a09e091a JB |
1 | /* |
2 | * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) | |
3 | * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice including the dates of first publication and | |
13 | * either this permission notice or a reference to | |
14 | * http://oss.sgi.com/projects/FreeB/ | |
15 | * shall be included in all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
21 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF | |
22 | * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | * | |
25 | * Except as contained in this notice, the name of Silicon Graphics, Inc. | |
26 | * shall not be used in advertising or otherwise to promote the sale, use or | |
27 | * other dealings in this Software without prior written authorization from | |
28 | * Silicon Graphics, Inc. | |
29 | */ | |
30 | ||
31 | #ifdef HAVE_DIX_CONFIG_H | |
32 | #include <dix-config.h> | |
33 | #endif | |
34 | ||
35 | #include <string.h> | |
36 | #include <stdio.h> | |
37 | #include <stdlib.h> | |
38 | ||
39 | #include "glxserver.h" | |
40 | #include "glxutil.h" | |
41 | #include "glxext.h" | |
42 | #include "indirect_dispatch.h" | |
43 | #include "unpack.h" | |
44 | ||
45 | int | |
46 | __glXDisp_FeedbackBuffer(__GLXclientState * cl, GLbyte * pc) | |
47 | { | |
48 | GLsizei size; | |
49 | GLenum type; | |
50 | __GLXcontext *cx; | |
51 | int error; | |
52 | ||
53 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
54 | if (!cx) { | |
55 | return error; | |
56 | } | |
57 | ||
58 | pc += __GLX_SINGLE_HDR_SIZE; | |
59 | size = *(GLsizei *) (pc + 0); | |
60 | type = *(GLenum *) (pc + 4); | |
61 | if (cx->feedbackBufSize < size) { | |
62 | cx->feedbackBuf = (GLfloat *) realloc(cx->feedbackBuf, | |
63 | (size_t) size | |
64 | * __GLX_SIZE_FLOAT32); | |
65 | if (!cx->feedbackBuf) { | |
66 | cl->client->errorValue = size; | |
67 | return BadAlloc; | |
68 | } | |
69 | cx->feedbackBufSize = size; | |
70 | } | |
71 | glFeedbackBuffer(size, type, cx->feedbackBuf); | |
72 | cx->hasUnflushedCommands = GL_TRUE; | |
73 | return Success; | |
74 | } | |
75 | ||
76 | int | |
77 | __glXDisp_SelectBuffer(__GLXclientState * cl, GLbyte * pc) | |
78 | { | |
79 | __GLXcontext *cx; | |
80 | GLsizei size; | |
81 | int error; | |
82 | ||
83 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
84 | if (!cx) { | |
85 | return error; | |
86 | } | |
87 | ||
88 | pc += __GLX_SINGLE_HDR_SIZE; | |
89 | size = *(GLsizei *) (pc + 0); | |
90 | if (cx->selectBufSize < size) { | |
91 | cx->selectBuf = (GLuint *) realloc(cx->selectBuf, | |
92 | (size_t) size * __GLX_SIZE_CARD32); | |
93 | if (!cx->selectBuf) { | |
94 | cl->client->errorValue = size; | |
95 | return BadAlloc; | |
96 | } | |
97 | cx->selectBufSize = size; | |
98 | } | |
99 | glSelectBuffer(size, cx->selectBuf); | |
100 | cx->hasUnflushedCommands = GL_TRUE; | |
101 | return Success; | |
102 | } | |
103 | ||
104 | int | |
105 | __glXDisp_RenderMode(__GLXclientState * cl, GLbyte * pc) | |
106 | { | |
107 | ClientPtr client; | |
108 | xGLXRenderModeReply reply; | |
109 | __GLXcontext *cx; | |
110 | GLint nitems = 0, retBytes = 0, retval, newModeCheck; | |
111 | GLubyte *retBuffer = NULL; | |
112 | GLenum newMode; | |
113 | int error; | |
114 | ||
115 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
116 | if (!cx) { | |
117 | return error; | |
118 | } | |
119 | ||
120 | pc += __GLX_SINGLE_HDR_SIZE; | |
121 | newMode = *(GLenum *) pc; | |
122 | retval = glRenderMode(newMode); | |
123 | ||
124 | /* Check that render mode worked */ | |
125 | glGetIntegerv(GL_RENDER_MODE, &newModeCheck); | |
126 | if (newModeCheck != newMode) { | |
127 | /* Render mode change failed. Bail */ | |
128 | newMode = newModeCheck; | |
129 | goto noChangeAllowed; | |
130 | } | |
131 | ||
132 | /* | |
133 | ** Render mode might have still failed if we get here. But in this | |
134 | ** case we can't really tell, nor does it matter. If it did fail, it | |
135 | ** will return 0, and thus we won't send any data across the wire. | |
136 | */ | |
137 | ||
138 | switch (cx->renderMode) { | |
139 | case GL_RENDER: | |
140 | cx->renderMode = newMode; | |
141 | break; | |
142 | case GL_FEEDBACK: | |
143 | if (retval < 0) { | |
144 | /* Overflow happened. Copy the entire buffer */ | |
145 | nitems = cx->feedbackBufSize; | |
146 | } | |
147 | else { | |
148 | nitems = retval; | |
149 | } | |
150 | retBytes = nitems * __GLX_SIZE_FLOAT32; | |
151 | retBuffer = (GLubyte *) cx->feedbackBuf; | |
152 | cx->renderMode = newMode; | |
153 | break; | |
154 | case GL_SELECT: | |
155 | if (retval < 0) { | |
156 | /* Overflow happened. Copy the entire buffer */ | |
157 | nitems = cx->selectBufSize; | |
158 | } | |
159 | else { | |
160 | GLuint *bp = cx->selectBuf; | |
161 | GLint i; | |
162 | ||
163 | /* | |
164 | ** Figure out how many bytes of data need to be sent. Parse | |
165 | ** the selection buffer to determine this fact as the | |
166 | ** return value is the number of hits, not the number of | |
167 | ** items in the buffer. | |
168 | */ | |
169 | nitems = 0; | |
170 | i = retval; | |
171 | while (--i >= 0) { | |
172 | GLuint n; | |
173 | ||
174 | /* Parse select data for this hit */ | |
175 | n = *bp; | |
176 | bp += 3 + n; | |
177 | } | |
178 | nitems = bp - cx->selectBuf; | |
179 | } | |
180 | retBytes = nitems * __GLX_SIZE_CARD32; | |
181 | retBuffer = (GLubyte *) cx->selectBuf; | |
182 | cx->renderMode = newMode; | |
183 | break; | |
184 | } | |
185 | ||
186 | /* | |
187 | ** First reply is the number of elements returned in the feedback or | |
188 | ** selection array, as per the API for glRenderMode itself. | |
189 | */ | |
190 | noChangeAllowed:; | |
191 | client = cl->client; | |
192 | reply = (xGLXRenderModeReply) { | |
193 | .type = X_Reply, | |
194 | .sequenceNumber = client->sequence, | |
195 | .length = nitems, | |
196 | .retval = retval, | |
197 | .size = nitems, | |
198 | .newMode = newMode | |
199 | }; | |
200 | WriteToClient(client, sz_xGLXRenderModeReply, &reply); | |
201 | if (retBytes) { | |
202 | WriteToClient(client, retBytes, retBuffer); | |
203 | } | |
204 | return Success; | |
205 | } | |
206 | ||
207 | int | |
208 | __glXDisp_Flush(__GLXclientState * cl, GLbyte * pc) | |
209 | { | |
210 | __GLXcontext *cx; | |
211 | int error; | |
212 | ||
213 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
214 | if (!cx) { | |
215 | return error; | |
216 | } | |
217 | ||
218 | glFlush(); | |
219 | cx->hasUnflushedCommands = GL_FALSE; | |
220 | return Success; | |
221 | } | |
222 | ||
223 | int | |
224 | __glXDisp_Finish(__GLXclientState * cl, GLbyte * pc) | |
225 | { | |
226 | __GLXcontext *cx; | |
227 | ClientPtr client; | |
228 | int error; | |
229 | ||
230 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
231 | if (!cx) { | |
232 | return error; | |
233 | } | |
234 | ||
235 | /* Do a local glFinish */ | |
236 | glFinish(); | |
237 | cx->hasUnflushedCommands = GL_FALSE; | |
238 | ||
239 | /* Send empty reply packet to indicate finish is finished */ | |
240 | client = cl->client; | |
241 | __GLX_BEGIN_REPLY(0); | |
242 | __GLX_SEND_HEADER(); | |
243 | return Success; | |
244 | } | |
245 | ||
246 | #define SEPARATOR " " | |
247 | ||
248 | char * | |
249 | __glXcombine_strings(const char *cext_string, const char *sext_string) | |
250 | { | |
251 | size_t clen, slen; | |
252 | char *combo_string, *token, *s1; | |
253 | const char *s2, *end; | |
254 | ||
255 | /* safeguard to prevent potentially fatal errors in the string functions */ | |
256 | if (!cext_string) | |
257 | cext_string = ""; | |
258 | if (!sext_string) | |
259 | sext_string = ""; | |
260 | ||
261 | /* | |
262 | ** String can't be longer than min(cstring, sstring) | |
263 | ** pull tokens out of shortest string | |
264 | ** include space in combo_string for final separator and null terminator | |
265 | */ | |
266 | clen = strlen(cext_string); | |
267 | slen = strlen(sext_string); | |
268 | if (clen > slen) { | |
269 | combo_string = (char *) malloc(slen + 2); | |
270 | s1 = (char *) malloc(slen + 2); | |
271 | if (s1) | |
272 | strcpy(s1, sext_string); | |
273 | s2 = cext_string; | |
274 | } | |
275 | else { | |
276 | combo_string = (char *) malloc(clen + 2); | |
277 | s1 = (char *) malloc(clen + 2); | |
278 | if (s1) | |
279 | strcpy(s1, cext_string); | |
280 | s2 = sext_string; | |
281 | } | |
282 | if (!combo_string || !s1) { | |
283 | free(combo_string); | |
284 | free(s1); | |
285 | return NULL; | |
286 | } | |
287 | combo_string[0] = '\0'; | |
288 | ||
289 | /* Get first extension token */ | |
290 | token = strtok(s1, SEPARATOR); | |
291 | while (token != NULL) { | |
292 | ||
293 | /* | |
294 | ** if token in second string then save it | |
295 | ** beware of extension names which are prefixes of other extension names | |
296 | */ | |
297 | const char *p = s2; | |
298 | ||
299 | end = p + strlen(p); | |
300 | while (p < end) { | |
301 | size_t n = strcspn(p, SEPARATOR); | |
302 | ||
303 | if ((strlen(token) == n) && (strncmp(token, p, n) == 0)) { | |
304 | combo_string = strcat(combo_string, token); | |
305 | combo_string = strcat(combo_string, SEPARATOR); | |
306 | } | |
307 | p += (n + 1); | |
308 | } | |
309 | ||
310 | /* Get next extension token */ | |
311 | token = strtok(NULL, SEPARATOR); | |
312 | } | |
313 | free(s1); | |
314 | return combo_string; | |
315 | } | |
316 | ||
317 | int | |
318 | DoGetString(__GLXclientState * cl, GLbyte * pc, GLboolean need_swap) | |
319 | { | |
320 | ClientPtr client; | |
321 | __GLXcontext *cx; | |
322 | GLenum name; | |
323 | const char *string; | |
324 | ||
325 | __GLX_DECLARE_SWAP_VARIABLES; | |
326 | int error; | |
327 | char *buf = NULL, *buf1 = NULL; | |
328 | GLint length = 0; | |
329 | ||
330 | /* If the client has the opposite byte order, swap the contextTag and | |
331 | * the name. | |
332 | */ | |
333 | if (need_swap) { | |
334 | __GLX_SWAP_INT(pc + 4); | |
335 | __GLX_SWAP_INT(pc + __GLX_SINGLE_HDR_SIZE); | |
336 | } | |
337 | ||
338 | cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error); | |
339 | if (!cx) { | |
340 | return error; | |
341 | } | |
342 | ||
343 | pc += __GLX_SINGLE_HDR_SIZE; | |
344 | name = *(GLenum *) (pc + 0); | |
345 | string = (const char *) glGetString(name); | |
346 | client = cl->client; | |
347 | ||
348 | if (string == NULL) | |
349 | string = ""; | |
350 | ||
351 | /* | |
352 | ** Restrict extensions to those that are supported by both the | |
353 | ** implementation and the connection. That is, return the | |
354 | ** intersection of client, server, and core extension strings. | |
355 | */ | |
356 | if (name == GL_EXTENSIONS) { | |
357 | buf1 = __glXcombine_strings(string, cl->GLClientextensions); | |
358 | buf = __glXcombine_strings(buf1, cx->pGlxScreen->GLextensions); | |
359 | free(buf1); | |
360 | string = buf; | |
361 | } | |
362 | else if (name == GL_VERSION) { | |
363 | if (atof(string) > atof(GLServerVersion)) { | |
364 | if (asprintf(&buf, "%s (%s)", GLServerVersion, string) == -1) { | |
365 | string = GLServerVersion; | |
366 | } | |
367 | else { | |
368 | string = buf; | |
369 | } | |
370 | } | |
371 | } | |
372 | if (string) { | |
373 | length = strlen((const char *) string) + 1; | |
374 | } | |
375 | ||
376 | __GLX_BEGIN_REPLY(length); | |
377 | __GLX_PUT_SIZE(length); | |
378 | ||
379 | if (need_swap) { | |
380 | __GLX_SWAP_REPLY_SIZE(); | |
381 | __GLX_SWAP_REPLY_HEADER(); | |
382 | } | |
383 | ||
384 | __GLX_SEND_HEADER(); | |
385 | WriteToClient(client, length, string); | |
386 | free(buf); | |
387 | ||
388 | return Success; | |
389 | } | |
390 | ||
391 | int | |
392 | __glXDisp_GetString(__GLXclientState * cl, GLbyte * pc) | |
393 | { | |
394 | return DoGetString(cl, pc, GL_FALSE); | |
395 | } |