2 * Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett.
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
19 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * Except as contained in this notice, the names of the authors or their
23 * institutions shall not be used in advertising or otherwise to promote the
24 * sale, use or other dealings in this Software without prior written
25 * authorization from the authors.
30 #include <sys/types.h>
32 /* TODO: check for stdint in config? (HAVE_STDINT) fallback? */
35 /* FIXME: these names conflict with those defined in Xmd.h. */
39 typedef uint8_t CARD8;
40 typedef uint16_t CARD16;
41 typedef uint32_t CARD32;
43 typedef int16_t INT16;
44 typedef int32_t INT32;
56 #if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
57 #define deprecated __attribute__((__deprecated__))
68 * @defgroup XCB_Core_Api XCB Core API
69 * @brief Core API of the XCB library.
74 /* Pre-defined constants */
76 /** Current protocol version */
79 /** Current minor version */
80 #define X_PROTOCOL_REVISION 0
82 /** X_TCP_PORT + display number = server port for TCP transport */
83 #define X_TCP_PORT 6000
85 #define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1))
87 /* Opaque structures */
90 * @brief XCB Connection structure.
92 * A structure that contain all data that XCB needs to communicate with an X server.
94 typedef struct XCBConnection XCBConnection; /**< Opaque structure containing all data that XCB needs to communicate with an X server. */
100 * @brief Generic iterator.
102 * A generic iterator structure.
105 void *data; /**< Data of the current iterator */
106 int rem; /**< remaining elements */
107 int index; /**< index of the current iterator */
111 * @brief Generic reply.
113 * A generic reply structure.
116 BYTE response_type; /**< Type of the response */
117 CARD8 pad0; /**< Padding */
118 CARD16 sequence; /**< Sequence number */
119 CARD32 length; /**< Length of the response */
123 * @brief Generic event.
125 * A generic event structure.
128 BYTE response_type; /**< Type of the response */
129 CARD8 pad0; /**< Padding */
130 CARD16 sequence; /**< Sequence number */
131 CARD32 pad[7]; /**< Padding */
132 CARD32 full_sequence;
136 * @brief Generic error.
138 * A generic error structure.
141 BYTE response_type; /**< Type of the response */
142 BYTE error_code; /**< Error code */
143 CARD16 sequence; /**< Sequence number */
144 CARD32 pad[7]; /**< Padding */
145 CARD32 full_sequence;
149 * @brief Generic cookie.
151 * A generic cookie structure.
154 unsigned int sequence; /**< Sequence number */
158 /* Include the generated xproto header. */
162 /** XCBNone is the universal null resource or null atom parameter value for many core X requests */
165 /** XCBCopyFromParent can be used for many CreateWindow parameters */
166 #define XCBCopyFromParent 0L
168 /** XCBCurrentTime can be used in most requests that take an XCBTIMESTAMP */
169 #define XCBCurrentTime 0L
171 /** XCBNoSymbol fills in unused entries in XCBKEYSYM tables */
172 #define XCBNoSymbol 0L
178 * @brief Container for authorization information.
180 * A container for authorization information to be sent to the X server.
182 typedef struct XCBAuthInfo {
183 int namelen; /**< Length of the string name (as returned by strlen). */
184 char *name; /**< String containing the authentication protocol name, such as "MIT-MAGIC-COOKIE-1" or "XDM-AUTHORIZATION-1". */
185 int datalen; /**< Length of the data member. */
186 char *data; /**< Data interpreted in a protocol-specific manner. */
190 * @brief Gets authorization information.
191 * @param fd: The file descriptor.
192 * @param info: The authorisation info to set.
193 * @return @c 0 on failure, 1 otherwise.
195 * @deprecated This function is deprecated. It must not be used in
196 * newly written code.
198 int XCBGetAuthInfo(int fd, XCBAuthInfo *info) deprecated;
204 * @brief Forces any buffered output to be written to the server.
205 * @param c: The connection to the X server.
206 * @return > @c 0 on success, <= @c 0 otherwise.
208 * Forces any buffered output to be written to the server. Blocks
209 * until the write is complete.
211 int XCBFlush(XCBConnection *c);
214 * @brief Returns the maximum request length field from the connection
216 * @param c: The connection to the X server.
217 * @return The maximum request length field.
219 * In the absence of the BIG-REQUESTS extension, returns the
220 * maximum request length field from the connection setup data, which
221 * may be as much as 65535. If the server supports BIG-REQUESTS, then
222 * the maximum request length field from the reply to the
223 * BigRequestsEnable request will be returned instead.
225 * Note that this length is measured in four-byte units, making the
226 * theoretical maximum lengths roughly 256kB without BIG-REQUESTS and
229 CARD32 XCBGetMaximumRequestLength(XCBConnection *c);
235 * @brief Returns the next event or error from the server.
236 * @param c: The connection to the X server.
237 * @return The next event from the server.
239 * @deprecated This function is deprecated. It must not be used in
240 * newly written code.
242 XCBGenericEvent *XCBWaitEvent(XCBConnection *c) deprecated;
245 * @brief Returns the next event or error from the server.
246 * @param c: The connection to the X server.
247 * @return The next event from the server.
249 * Returns the next event or error from the server, or returns null in
250 * the event of an I/O error. Blocks until either an event or error
251 * arrive, or an I/O error occurs.
253 XCBGenericEvent *XCBWaitForEvent(XCBConnection *c);
256 * @brief Returns the next event or error from the server.
257 * @param c: The connection to the X server.
258 * @param error: A pointer to an int to be filled in with the I/O
259 * error status of the operation.
260 * @return The next event from the server.
262 * Returns the next event or error from the server, if one is
263 * available, or returns @c NULL otherwise. If no event is available, that
264 * might be because an I/O error like connection close occurred while
265 * attempting to read the next event. The @p error parameter is a
266 * pointer to an int to be filled in with the I/O error status of the
267 * operation. If @p error is @c NULL, terminates the application when an
270 XCBGenericEvent *XCBPollForEvent(XCBConnection *c, int *error);
273 * @brief Returns the last sequence number that the server is known to
275 * @param c: The connection to the X server.
276 * @return The last sequence number.
278 * Returns the last sequence number that the server is known to have
279 * processed. This function enables applications to determine whether
280 * forcing a cookie is going to block.
282 * @deprecated This function is deprecated in favor of XCBPollForReply.
283 * It must not be used in newly written code.
285 unsigned int XCBGetRequestRead(XCBConnection *c) deprecated;
291 * @typedef typedef struct XCBExtension XCBExtension
293 typedef struct XCBExtension XCBExtension; /**< Opaque structure used as key for XCBGetExtensionData. */
296 * @brief Caches reply information from QueryExtension requests.
297 * @param c: The connection.
298 * @param ext: The extension data.
299 * @return A pointer to the XCBQueryExtensionRep for the extension.
301 * This function is the primary interface to the "extension cache",
302 * which caches reply information from QueryExtension
303 * requests. Invoking this function may cause a call to
304 * XCBQueryExtension to retrieve extension information from the
305 * server, and may block until extension data is received from the
308 * The result must not be freed. This storage is managed by the cache
311 const XCBQueryExtensionRep *XCBGetExtensionData(XCBConnection *c, XCBExtension *ext);
314 * @brief Prefetch of extension data into the extension cache
315 * @param c: The connection.
316 * @param ext: The extension data.
318 * This function allows a "prefetch" of extension data into the
319 * extension cache. Invoking the function may cause a call to
320 * XCBQueryExtension, but will not block waiting for the
321 * reply. XCBGetExtensionData will return the prefetched data after
322 * possibly blocking while it is retrieved.
324 void XCBPrefetchExtensionData(XCBConnection *c, XCBExtension *ext);
330 * @brief Access the data returned by the server.
331 * @param c: The connection.
332 * @return A pointer to an XCBSetup structure.
334 * Accessor for the data returned by the server when the XCBConnection
335 * was initialized. This data includes
336 * - the server's required format for images,
337 * - a list of available visuals,
338 * - a list of available screens,
339 * - the server's maximum request length (in the absence of the
340 * BIG-REQUESTS extension),
341 * - and other assorted information.
343 * See the X protocol specification for more details.
345 * The result must not be freed.
347 const XCBSetup *XCBGetSetup(XCBConnection *c);
350 * @brief Access the file descriptor of the connection.
351 * @param c: The connection.
352 * @return The file descriptor.
354 * Accessor for the file descriptor that was passed to the
355 * XCBConnectToFD call that returned @p c.
357 int XCBGetFileDescriptor(XCBConnection *c);
360 * @brief Connects to the X server.
361 * @param fd: The file descriptor.
362 * @param auth_info: Authentication data.
363 * @return A newly allocated XCBConnection structure.
365 * Connects to an X server, given the open socket @p fd and the
366 * XCBAuthInfo @p auth_info. The file descriptor @p fd is
367 * bidirectionally connected to an X server. XCBGetTCPFD and
368 * XCBGetUnixFD return appropriate file descriptors. If the connection
369 * should be unauthenticated, @p auth_info must be @c
370 * NULL. XCBGetAuthInfo returns appropriate authentication data.
372 XCBConnection *XCBConnectToFD(int fd, XCBAuthInfo *auth_info);
375 * @brief Closes the connection.
376 * @param c: The connection.
378 * Closes the file descriptor and frees all memory associated with the
381 void XCBDisconnect(XCBConnection *c);
387 * @brief Parses a display string name in the form documented by X(7x).
388 * @param displayname: The name of the display.
389 * @param hostp: A pointer to a malloc'd copy of the hostname.
390 * @param displayp: A pointer to the display number.
391 * @param screenp: A pointer to the screen number.
392 * @return 0 on failure, non 0 otherwise.
394 * Parses the display string name @p display_name in the form
395 * documented by X(7x). Has no side effects on failure. If
396 * @p displayname is @c NULL or empty, it uses the environment
397 * variable DISPLAY. @p hostp is a pointer to a newly allocated string
398 * that contain the host name. @p displayp is set to the display
399 * number and @p screenp to the preferred screen number. @p screenp
400 * can be @c NULL. If @p displayname does not contain a screen number,
403 int XCBParseDisplay(const char *name, char **host, int *display, int *screen);
406 * @brief Open a connection to the X server.
407 * @param host: The host name.
408 * @param display: The display number.
409 * @return The file descriptor.
411 * @deprecated This function is deprecated. It must not be used in
412 * newly written code.
414 int XCBOpen(const char *host, int display) deprecated;
417 * @brief Open a connection to the X server.
418 * @param host: The host name.
419 * @param port: The TCP port.
420 * @return The file descriptor.
422 * @deprecated This function is deprecated. It must not be used in
423 * newly written code.
425 int XCBOpenTCP(const char *host, unsigned short port) deprecated;
428 * @brief Connects to the X server.
429 * @param file: The file name.
430 * @return The file descriptor.
432 * @deprecated This function is deprecated. It must not be used in
433 * newly written code.
435 int XCBOpenUnix(const char *file) deprecated;
438 * @brief Connects to the X server.
439 * @return A newly allocated XCBConnection structure.
441 * @deprecated This function is deprecated. It must not be used in
442 * newly written code.
444 XCBConnection *XCBConnectBasic(void) deprecated;
447 * @brief Connects to the X server.
448 * @param displayname: The name of the display.
449 * @param screenp: A pointer to a preferred screen number.
450 * @return A newly allocated XCBConnection structure.
452 * Connects to the X server specified by @p displayname. If @p
453 * displayname is @c NULL, uses the value of the DISPLAY environment
454 * variable. If a particular screen on that server is preferred, the
455 * int pointed to by @p screenp (if not @c NULL) will be set to that
456 * screen; otherwise the screen will be set to 0.
458 XCBConnection *XCBConnect(const char *displayname, int *screenp);
461 * @brief Connects to the X server, using an authorization information.
462 * @param displayname: The name of the display.
463 * @param auth: The authorization information.
464 * @param screenp: A pointer to a preferred screen number.
465 * @return A newly allocated XCBConnection structure.
467 * Connects to the X server specified by @p displayname, using the
468 * authorization @p auth. If a particular screen on that server is
469 * preferred, the int pointed to by @p screenp (if not @c NULL) will
470 * be set to that screen; otherwise @p screenp will be set to 0.
472 XCBConnection *XCBConnectToDisplayWithAuthInfo(const char *display, XCBAuthInfo *auth, int *screen);
475 * @brief Ensures that all events and errors are avalaible in XCB.
476 * @param c: The connection to the X server.
477 * @param e: A pointer to an error.
478 * @return @c 1 on success, @c 0 otherwise.
480 * @deprecated This function is deprecated. It must not be used in
481 * newly written code. XCBFlush is more efficient.
482 * Use XCBAuxSync if absolutely necessary.
484 int XCBSync(XCBConnection *c, XCBGenericError **e) deprecated;
492 /* Old names for connection-setup types, to be removed before 1.0. */
494 typedef XCBSetupReq XCBConnSetupReq deprecated;
495 typedef XCBSetupReqIter XCBConnSetupReqIter deprecated;
496 typedef XCBSetupFailed XCBConnSetupFailedRep deprecated;
497 typedef XCBSetupFailedIter XCBConnSetupFailedRepIter deprecated;
498 typedef XCBSetupAuthenticate XCBConnSetupAuthenticateRep deprecated;
499 typedef XCBSetupAuthenticateIter XCBConnSetupAuthenticateRepIter deprecated;
500 typedef XCBSetup XCBConnSetupSuccessRep deprecated;
501 typedef XCBSetupIter XCBConnSetupSuccessRepIter deprecated;
503 char *XCBConnSetupReqAuthorizationProtocolName(XCBSetupReq *R) deprecated;
504 int XCBConnSetupReqAuthorizationProtocolNameLength(XCBSetupReq *R) deprecated;
505 XCBGenericIter XCBConnSetupReqAuthorizationProtocolNameEnd(XCBSetupReq *R) deprecated;
506 char *XCBConnSetupReqAuthorizationProtocolData(XCBSetupReq *R) deprecated;
507 int XCBConnSetupReqAuthorizationProtocolDataLength(XCBSetupReq *R) deprecated;
508 XCBGenericIter XCBConnSetupReqAuthorizationProtocolDataEnd(XCBSetupReq *R) deprecated;
509 void XCBConnSetupReqNext(XCBSetupReqIter *i) deprecated;
510 XCBGenericIter XCBConnSetupReqEnd(XCBSetupReqIter i) deprecated;
511 char *XCBConnSetupFailedRepReason(XCBSetupFailed *R) deprecated;
512 int XCBConnSetupFailedRepReasonLength(XCBSetupFailed *R) deprecated;
513 XCBGenericIter XCBConnSetupFailedRepReasonEnd(XCBSetupFailed *R) deprecated;
514 void XCBConnSetupFailedRepNext(XCBSetupFailedIter *i) deprecated;
515 XCBGenericIter XCBConnSetupFailedRepEnd(XCBSetupFailedIter i) deprecated;
516 char *XCBConnSetupAuthenticateRepReason(XCBSetupAuthenticate *R) deprecated;
517 int XCBConnSetupAuthenticateRepReasonLength(XCBSetupAuthenticate *R) deprecated;
518 XCBGenericIter XCBConnSetupAuthenticateRepReasonEnd(XCBSetupAuthenticate *R) deprecated;
519 void XCBConnSetupAuthenticateRepNext(XCBSetupAuthenticateIter *i) deprecated;
520 XCBGenericIter XCBConnSetupAuthenticateRepEnd(XCBSetupAuthenticateIter i) deprecated;
521 char *XCBConnSetupSuccessRepVendor(XCBSetup *R) deprecated;
522 int XCBConnSetupSuccessRepVendorLength(XCBSetup *R) deprecated;
523 XCBGenericIter XCBConnSetupSuccessRepVendorEnd(XCBSetup *R) deprecated;
524 XCBFORMAT *XCBConnSetupSuccessRepPixmapFormats(XCBSetup *R) deprecated;
525 int XCBConnSetupSuccessRepPixmapFormatsLength(XCBSetup *R) deprecated;
526 XCBFORMATIter XCBConnSetupSuccessRepPixmapFormatsIter(XCBSetup *R) deprecated;
527 int XCBConnSetupSuccessRepRootsLength(XCBSetup *R) deprecated;
528 XCBSCREENIter XCBConnSetupSuccessRepRootsIter(XCBSetup *R) deprecated;
529 void XCBConnSetupSuccessRepNext(XCBSetupIter *i) deprecated;
530 XCBGenericIter XCBConnSetupSuccessRepEnd(XCBSetupIter i) deprecated;
538 #endif /* __XCB_H__ */