X-Git-Url: http://git.demorecorder.com/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fxcb.h;h=23fe74e9fe47df6fc8cf7917e88adb463fdd2f3f;hb=a187ae85729ec56e46ed0a0453458db18ab731eb;hp=68c32a858a0205836d0194af7bd693962e65b0fc;hpb=d8de2c7c2a9b8bf59c8f1fcece5faed0b6cbf6f4;p=free-sw%2Fxcb%2Flibxcb diff --git a/src/xcb.h b/src/xcb.h index 68c32a8..23fe74e 100644 --- a/src/xcb.h +++ b/src/xcb.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2001-2004 Bart Massey, Jamey Sharp, and Josh Triplett. + * Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -8,163 +8,572 @@ * 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 and this permission notice 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 THE * AUTHORS 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 names of the authors or their * institutions shall not be used in advertising or otherwise to promote the * sale, use or other dealings in this Software without prior written * authorization from the authors. */ -#ifndef __XCB_H -#define __XCB_H +#ifndef __XCB_H__ +#define __XCB_H__ #include -#include -#include + +#if defined(__solaris__) +#include +#else +#include +#endif + +#ifndef _WIN32 #include +#else +#include "xcb_windefs.h" +#endif #include + #ifdef __cplusplus extern "C" { #endif -#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) -#define deprecated __attribute__((__deprecated__)) -#else -#define deprecated -#endif +/** + * @file xcb.h + */ + +#define XCB_PACKED __attribute__((__packed__)) + +/** + * @defgroup XCB_Core_API XCB Core API + * @brief Core API of the XCB library. + * + * @{ + */ /* Pre-defined constants */ -/* current protocol version */ +/** Current protocol version */ #define X_PROTOCOL 11 -/* current minor version */ +/** Current minor version */ #define X_PROTOCOL_REVISION 0 -/* X_TCP_PORT + display number = server port for TCP transport */ +/** X_TCP_PORT + display number = server port for TCP transport */ #define X_TCP_PORT 6000 -#define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1)) +/** xcb connection errors because of socket, pipe and other stream errors. */ +#define XCB_CONN_ERROR 1 + +/** xcb connection shutdown because of extension not supported */ +#define XCB_CONN_CLOSED_EXT_NOTSUPPORTED 2 + +/** malloc(), calloc() and realloc() error upon failure, for eg ENOMEM */ +#define XCB_CONN_CLOSED_MEM_INSUFFICIENT 3 + +/** Connection closed, exceeding request length that server accepts. */ +#define XCB_CONN_CLOSED_REQ_LEN_EXCEED 4 +/** Connection closed, error during parsing display string. */ +#define XCB_CONN_CLOSED_PARSE_ERR 5 + +/** Connection closed because the server does not have a screen matching the display. */ +#define XCB_CONN_CLOSED_INVALID_SCREEN 6 + +/** Connection closed because some FD passing operation failed */ +#define XCB_CONN_CLOSED_FDPASSING_FAILED 7 + +#define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1)) /* Opaque structures */ -typedef struct XCBConnection XCBConnection; +/** + * @brief XCB Connection structure. + * + * A structure that contain all data that XCB needs to communicate with an X server. + */ +typedef struct xcb_connection_t xcb_connection_t; /**< Opaque structure containing all data that XCB needs to communicate with an X server. */ /* Other types */ +/** + * @brief Generic iterator. + * + * A generic iterator structure. + */ typedef struct { - void *data; - int rem; - int index; -} XCBGenericIter; + void *data; /**< Data of the current iterator */ + int rem; /**< remaining elements */ + int index; /**< index of the current iterator */ +} xcb_generic_iterator_t; +/** + * @brief Generic reply. + * + * A generic reply structure. + */ typedef struct { - BYTE response_type; - CARD8 pad0; - CARD16 sequence; - CARD32 length; -} XCBGenericRep; - + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t length; /**< Length of the response */ +} xcb_generic_reply_t; + +/** + * @brief Generic event. + * + * A generic event structure. + */ typedef struct { - BYTE response_type; - CARD8 pad0; - CARD16 sequence; - CARD32 pad[7]; - CARD32 full_sequence; -} XCBGenericEvent; - + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t pad[7]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_generic_event_t; + +/** + * @brief GE event + * + * An event as sent by the XGE extension. The length field specifies the + * number of 4-byte blocks trailing the struct. + * + * @deprecated Since some fields in this struct have unfortunate names, it is + * recommended to use xcb_ge_generic_event_t instead. + */ typedef struct { - BYTE response_type; - BYTE error_code; - CARD16 sequence; - CARD32 pad[7]; - CARD32 full_sequence; -} XCBGenericError; - + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t length; + uint16_t event_type; + uint16_t pad1; + uint32_t pad[5]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_ge_event_t; + +/** + * @brief Generic error. + * + * A generic error structure. + */ typedef struct { - unsigned int sequence; -} XCBVoidCookie; + uint8_t response_type; /**< Type of the response */ + uint8_t error_code; /**< Error code */ + uint16_t sequence; /**< Sequence number */ + uint32_t resource_id; /** < Resource ID for requests with side effects only */ + uint16_t minor_code; /** < Minor opcode of the failed request */ + uint8_t major_code; /** < Major opcode of the failed request */ + uint8_t pad0; + uint32_t pad[5]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_generic_error_t; + +/** + * @brief Generic cookie. + * + * A generic cookie structure. + */ +typedef struct { + unsigned int sequence; /**< Sequence number */ +} xcb_void_cookie_t; -/* Include the generated xproto and xcb_types headers. */ -#include "xcb_types.h" +/* Include the generated xproto header. */ #include "xproto.h" -/* xcb_auth.c */ +/** XCB_NONE is the universal null resource or null atom parameter value for many core X requests */ +#define XCB_NONE 0L + +/** XCB_COPY_FROM_PARENT can be used for many xcb_create_window parameters */ +#define XCB_COPY_FROM_PARENT 0L + +/** XCB_CURRENT_TIME can be used in most requests that take an xcb_timestamp_t */ +#define XCB_CURRENT_TIME 0L + +/** XCB_NO_SYMBOL fills in unused entries in xcb_keysym_t tables */ +#define XCB_NO_SYMBOL 0L + -typedef struct XCBAuthInfo { - int namelen; - char *name; - int datalen; - char *data; -} XCBAuthInfo; +/* xcb_auth.c */ -int XCBGetAuthInfo(int fd, XCBAuthInfo *info) deprecated; +/** + * @brief Container for authorization information. + * + * A container for authorization information to be sent to the X server. + */ +typedef struct xcb_auth_info_t { + int namelen; /**< Length of the string name (as returned by strlen). */ + char *name; /**< String containing the authentication protocol name, such as "MIT-MAGIC-COOKIE-1" or "XDM-AUTHORIZATION-1". */ + int datalen; /**< Length of the data member. */ + char *data; /**< Data interpreted in a protocol-specific manner. */ +} xcb_auth_info_t; /* xcb_out.c */ -int XCBFlush(XCBConnection *c); -CARD32 XCBGetMaximumRequestLength(XCBConnection *c); +/** + * @brief Forces any buffered output to be written to the server. + * @param c: The connection to the X server. + * @return > @c 0 on success, <= @c 0 otherwise. + * + * Forces any buffered output to be written to the server. Blocks + * until the write is complete. + */ +int xcb_flush(xcb_connection_t *c); + +/** + * @brief Returns the maximum request length that this server accepts. + * @param c: The connection to the X server. + * @return The maximum request length field. + * + * In the absence of the BIG-REQUESTS extension, returns the + * maximum request length field from the connection setup data, which + * may be as much as 65535. If the server supports BIG-REQUESTS, then + * the maximum request length field from the reply to the + * BigRequestsEnable request will be returned instead. + * + * Note that this length is measured in four-byte units, making the + * theoretical maximum lengths roughly 256kB without BIG-REQUESTS and + * 16GB with. + */ +uint32_t xcb_get_maximum_request_length(xcb_connection_t *c); + +/** + * @brief Prefetch the maximum request length without blocking. + * @param c: The connection to the X server. + * + * Without blocking, does as much work as possible toward computing + * the maximum request length accepted by the X server. + * + * Invoking this function may cause a call to xcb_big_requests_enable, + * but will not block waiting for the reply. + * xcb_get_maximum_request_length will return the prefetched data + * after possibly blocking while the reply is retrieved. + * + * Note that in order for this function to be fully non-blocking, the + * application must previously have called + * xcb_prefetch_extension_data(c, &xcb_big_requests_id) and the reply + * must have already arrived. + */ +void xcb_prefetch_maximum_request_length(xcb_connection_t *c); /* xcb_in.c */ -XCBGenericEvent *XCBWaitEvent(XCBConnection *c) deprecated; -XCBGenericEvent *XCBWaitForEvent(XCBConnection *c); -XCBGenericEvent *XCBPollForEvent(XCBConnection *c, int *error); -unsigned int XCBGetRequestRead(XCBConnection *c); +/** + * @brief Returns the next event or error from the server. + * @param c: The connection to the X server. + * @return The next event from the server. + * + * Returns the next event or error from the server, or returns null in + * the event of an I/O error. Blocks until either an event or error + * arrive, or an I/O error occurs. + */ +xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c); +/** + * @brief Returns the next event or error from the server. + * @param c: The connection to the X server. + * @return The next event from the server. + * + * Returns the next event or error from the server, if one is + * available, or returns @c NULL otherwise. If no event is available, that + * might be because an I/O error like connection close occurred while + * attempting to read the next event, in which case the connection is + * shut down when this function returns. + */ +xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c); -/* xcb_ext.c */ +/** + * @brief Returns the next event without reading from the connection. + * @param c: The connection to the X server. + * @return The next already queued event from the server. + * + * This is a version of xcb_poll_for_event that only examines the + * event queue for new events. The function doesn't try to read new + * events from the connection if no queued events are found. + * + * This function is useful for callers that know in advance that all + * interesting events have already been read from the connection. For + * example, callers might use xcb_wait_for_reply and be interested + * only of events that preceded a specific reply. + */ +xcb_generic_event_t *xcb_poll_for_queued_event(xcb_connection_t *c); + +typedef struct xcb_special_event xcb_special_event_t; + +/** + * @brief Returns the next event from a special queue + */ +xcb_generic_event_t *xcb_poll_for_special_event(xcb_connection_t *c, + xcb_special_event_t *se); + +/** + * @brief Returns the next event from a special queue, blocking until one arrives + */ +xcb_generic_event_t *xcb_wait_for_special_event(xcb_connection_t *c, + xcb_special_event_t *se); +/** + * @typedef typedef struct xcb_extension_t xcb_extension_t + */ +typedef struct xcb_extension_t xcb_extension_t; /**< Opaque structure used as key for xcb_get_extension_data_t. */ + +/** + * @brief Listen for a special event + */ +xcb_special_event_t *xcb_register_for_special_xge(xcb_connection_t *c, + xcb_extension_t *ext, + uint32_t eid, + uint32_t *stamp); + +/** + * @brief Stop listening for a special event + */ +void xcb_unregister_for_special_event(xcb_connection_t *c, + xcb_special_event_t *se); + +/** + * @brief Return the error for a request, or NULL if none can ever arrive. + * @param c: The connection to the X server. + * @param cookie: The request cookie. + * @return The error for the request, or NULL if none can ever arrive. + * + * The xcb_void_cookie_t cookie supplied to this function must have resulted + * from a call to xcb_[request_name]_checked(). This function will block + * until one of two conditions happens. If an error is received, it will be + * returned. If a reply to a subsequent request has already arrived, no error + * can arrive for this request, so this function will return NULL. + * + * Note that this function will perform a sync if needed to ensure that the + * sequence number will advance beyond that provided in cookie; this is a + * convenience to avoid races in determining whether the sync is needed. + */ +xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie); + +/** + * @brief Discards the reply for a request. + * @param c: The connection to the X server. + * @param sequence: The request sequence number from a cookie. + * + * Discards the reply for a request. Additionally, any error generated + * by the request is also discarded (unless it was an _unchecked request + * and the error has already arrived). + * + * This function will not block even if the reply is not yet available. + * + * Note that the sequence really does have to come from an xcb cookie; + * this function is not designed to operate on socket-handoff replies. + */ +void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence); -typedef struct XCBExtension XCBExtension; -/* Do not free the returned XCBQueryExtensionRep - on return, it's aliased - * from the cache. */ -const XCBQueryExtensionRep *XCBGetExtensionData(XCBConnection *c, XCBExtension *ext); +/* xcb_ext.c */ + +/** + * @brief Caches reply information from QueryExtension requests. + * @param c: The connection. + * @param ext: The extension data. + * @return A pointer to the xcb_query_extension_reply_t for the extension. + * + * This function is the primary interface to the "extension cache", + * which caches reply information from QueryExtension + * requests. Invoking this function may cause a call to + * xcb_query_extension to retrieve extension information from the + * server, and may block until extension data is received from the + * server. + * + * The result must not be freed. This storage is managed by the cache + * itself. + */ +const struct xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext); -void XCBPrefetchExtensionData(XCBConnection *c, XCBExtension *ext); +/** + * @brief Prefetch of extension data into the extension cache + * @param c: The connection. + * @param ext: The extension data. + * + * This function allows a "prefetch" of extension data into the + * extension cache. Invoking the function may cause a call to + * xcb_query_extension, but will not block waiting for the + * reply. xcb_get_extension_data will return the prefetched data after + * possibly blocking while it is retrieved. + */ +void xcb_prefetch_extension_data(xcb_connection_t *c, xcb_extension_t *ext); /* xcb_conn.c */ -XCBConnSetupSuccessRep *XCBGetSetup(XCBConnection *c); -int XCBGetFileDescriptor(XCBConnection *c); +/** + * @brief Access the data returned by the server. + * @param c: The connection. + * @return A pointer to an xcb_setup_t structure. + * + * Accessor for the data returned by the server when the xcb_connection_t + * was initialized. This data includes + * - the server's required format for images, + * - a list of available visuals, + * - a list of available screens, + * - the server's maximum request length (in the absence of the + * BIG-REQUESTS extension), + * - and other assorted information. + * + * See the X protocol specification for more details. + * + * The result must not be freed. + */ +const struct xcb_setup_t *xcb_get_setup(xcb_connection_t *c); + +/** + * @brief Access the file descriptor of the connection. + * @param c: The connection. + * @return The file descriptor. + * + * Accessor for the file descriptor that was passed to the + * xcb_connect_to_fd call that returned @p c. + */ +int xcb_get_file_descriptor(xcb_connection_t *c); + +/** + * @brief Test whether the connection has shut down due to a fatal error. + * @param c: The connection. + * @return > 0 if the connection is in an error state; 0 otherwise. + * + * Some errors that occur in the context of an xcb_connection_t + * are unrecoverable. When such an error occurs, the + * connection is shut down and further operations on the + * xcb_connection_t have no effect, but memory will not be freed until + * xcb_disconnect() is called on the xcb_connection_t. + * + * @return XCB_CONN_ERROR, because of socket errors, pipe errors or other stream errors. + * @return XCB_CONN_CLOSED_EXT_NOTSUPPORTED, when extension not supported. + * @return XCB_CONN_CLOSED_MEM_INSUFFICIENT, when memory not available. + * @return XCB_CONN_CLOSED_REQ_LEN_EXCEED, exceeding request length that server accepts. + * @return XCB_CONN_CLOSED_PARSE_ERR, error during parsing display string. + * @return XCB_CONN_CLOSED_INVALID_SCREEN, because the server does not have a screen matching the display. + */ +int xcb_connection_has_error(xcb_connection_t *c); + +/** + * @brief Connects to the X server. + * @param fd: The file descriptor. + * @param auth_info: Authentication data. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to an X server, given the open socket @p fd and the + * xcb_auth_info_t @p auth_info. The file descriptor @p fd is + * bidirectionally connected to an X server. If the connection + * should be unauthenticated, @p auth_info must be @c + * NULL. + * + * Always returns a non-NULL pointer to a xcb_connection_t, even on failure. + * Callers need to use xcb_connection_has_error() to check for failure. + * When finished, use xcb_disconnect() to close the connection and free + * the structure. + */ +xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info); -XCBConnection *XCBConnectToFD(int fd, XCBAuthInfo *auth_info); -void XCBDisconnect(XCBConnection *c); +/** + * @brief Closes the connection. + * @param c: The connection. + * + * Closes the file descriptor and frees all memory associated with the + * connection @c c. If @p c is @c NULL, nothing is done. + */ +void xcb_disconnect(xcb_connection_t *c); /* xcb_util.c */ -int XCBParseDisplay(const char *name, char **host, int *display, int *screen); -int XCBOpen(const char *host, int display) deprecated; -int XCBOpenTCP(const char *host, unsigned short port) deprecated; -int XCBOpenUnix(const char *file) deprecated; +/** + * @brief Parses a display string name in the form documented by X(7x). + * @param name: The name of the display. + * @param host: A pointer to a malloc'd copy of the hostname. + * @param display: A pointer to the display number. + * @param screen: A pointer to the screen number. + * @return 0 on failure, non 0 otherwise. + * + * Parses the display string name @p display_name in the form + * documented by X(7x). Has no side effects on failure. If + * @p displayname is @c NULL or empty, it uses the environment + * variable DISPLAY. @p hostp is a pointer to a newly allocated string + * that contain the host name. @p displayp is set to the display + * number and @p screenp to the preferred screen number. @p screenp + * can be @c NULL. If @p displayname does not contain a screen number, + * it is set to @c 0. + */ +int xcb_parse_display(const char *name, char **host, int *display, int *screen); + +/** + * @brief Connects to the X server. + * @param displayname: The name of the display. + * @param screenp: A pointer to a preferred screen number. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to the X server specified by @p displayname. If @p + * displayname is @c NULL, uses the value of the DISPLAY environment + * variable. If a particular screen on that server is preferred, the + * int pointed to by @p screenp (if not @c NULL) will be set to that + * screen; otherwise the screen will be set to 0. + * + * Always returns a non-NULL pointer to a xcb_connection_t, even on failure. + * Callers need to use xcb_connection_has_error() to check for failure. + * When finished, use xcb_disconnect() to close the connection and free + * the structure. + */ +xcb_connection_t *xcb_connect(const char *displayname, int *screenp); + +/** + * @brief Connects to the X server, using an authorization information. + * @param display: The name of the display. + * @param auth: The authorization information. + * @param screen: A pointer to a preferred screen number. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to the X server specified by @p displayname, using the + * authorization @p auth. If a particular screen on that server is + * preferred, the int pointed to by @p screenp (if not @c NULL) will + * be set to that screen; otherwise @p screenp will be set to 0. + * + * Always returns a non-NULL pointer to a xcb_connection_t, even on failure. + * Callers need to use xcb_connection_has_error() to check for failure. + * When finished, use xcb_disconnect() to close the connection and free + * the structure. + */ +xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *display, xcb_auth_info_t *auth, int *screen); + -XCBConnection *XCBConnectBasic(void) deprecated; -XCBConnection *XCBConnect(const char *displayname, int *screenp); -XCBConnection *XCBConnectToDisplayWithAuthInfo(const char *display, XCBAuthInfo *auth, int *screen); +/* xcb_xid.c */ + +/** + * @brief Allocates an XID for a new object. + * @param c: The connection. + * @return A newly allocated XID. + * + * Allocates an XID for a new object. Typically used just prior to + * various object creation functions, such as xcb_create_window. + */ +uint32_t xcb_generate_id(xcb_connection_t *c); -int XCBSync(XCBConnection *c, XCBGenericError **e); +/** + * @} + */ #ifdef __cplusplus } #endif -#endif + +#endif /* __XCB_H__ */