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File indexing completed on 2025-01-18 10:14:41
0001 #ifndef XCB_CURSOR_H 0002 #define XCB_CURSOR_H 0003 0004 /* Copyright © 2013 Michael Stapelberg 0005 * 0006 * Permission is hereby granted, free of charge, to any person obtaining a 0007 * copy of this software and associated documentation files (the "Software"), 0008 * to deal in the Software without restriction, including without limitation 0009 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 0010 * and/or sell copies of the Software, and to permit persons to whom the 0011 * Software is furnished to do so, subject to the following conditions: 0012 * 0013 * The above copyright notice and this permission notice shall be included in 0014 * all copies or substantial portions of the Software. 0015 * 0016 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 0017 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 0018 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 0019 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 0020 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 0021 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 0022 * 0023 * Except as contained in this notice, the names of the authors or their 0024 * institutions shall not be used in advertising or otherwise to promote the 0025 * sale, use or other dealings in this Software without prior written 0026 * authorization from the authors. 0027 */ 0028 0029 #include <xcb/xcb.h> 0030 0031 #ifdef __cplusplus 0032 extern "C" { 0033 #endif 0034 0035 /** 0036 * @defgroup xcb__cursor_context_t XCB Cursor Functions 0037 * 0038 * These functions are the equivalent of libXcursor, but re-implemented for 0039 * XCB. They respect the user’s configured cursor theme when loading cursors, 0040 * specified by the X resources setting "Xcursor.theme". 0041 * 0042 * Here is how you would use these functions to change the X11 root window 0043 * cursor to "watch": 0044 * @code 0045 * int screennr; 0046 * xcb_connection_t *conn = xcb_connect(NULL, &screennr); 0047 * if (conn == NULL || xcb_connection_has_error(conn)) 0048 * err(EXIT_FAILURE, "Could not connect to X11"); 0049 * 0050 * xcb_screen_t *screen = xcb_aux_get_screen(conn, screennr); 0051 * xcb_cursor_context_t *ctx; 0052 * if (xcb_cursor_context_new(conn, screen, &ctx) < 0) 0053 * err(EXIT_FAILURE, "Could not initialize xcb-cursor"); 0054 * 0055 * xcb_cursor_t cid = xcb_cursor_load_cursor(ctx, "watch"); 0056 * 0057 * xcb_screen_t *screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; 0058 * xcb_change_window_attributes(conn, screen->root, XCB_CW_CURSOR, (uint32_t[]){ cid }); 0059 * xcb_free_cursor(conn, cid); 0060 * xcb_flush(conn); 0061 * 0062 * xcb_cursor_context_free(ctx); 0063 * xcb_disconnect(conn); 0064 * @endcode 0065 * 0066 * @{ 0067 */ 0068 0069 /** 0070 * @struct xcb_cursor_context_t 0071 * Describes a context for using this library. 0072 * 0073 * Create a context with @ref xcb_cursor_context_new (), then load one or more 0074 * cursors with @ref xcb_cursor_load_cursor () and destroy the context with @ref 0075 * xcb_cursor_context_free (). 0076 */ 0077 typedef struct xcb_cursor_context_t xcb_cursor_context_t; 0078 0079 /** 0080 * Create a new @ref xcb_cursor_context_t. 0081 * 0082 * @param conn A working XCB connection, which will be used until you destroy 0083 * the context with @ref xcb_cursor_context_free (). 0084 * @param screen The xcb_screen_t to use (e.g. for getting the RESOURCE_MANAGER 0085 * contents, for creating cursors on, for using the size as fallback when 0086 * calculating the best cursor size). 0087 * @param ctx A pointer to an xcb_cursor_context_t* which will be modified to 0088 * refer to the newly created context. 0089 * @return 0 on success, a negative error code otherwise. 0090 * 0091 * @ingroup xcb_cursor_context_t 0092 */ 0093 int xcb_cursor_context_new(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_context_t **ctx); 0094 0095 /** 0096 * Loads the specified cursor, either from the cursor theme or by falling back 0097 * to the X11 "cursor" font. 0098 * 0099 * @param ctx A cursor context, created with @ref xcb_cursor_context_new () 0100 * @param name The name of the cursor to load, e.g. "watch". 0101 * @returns The ID of the created cursor. When you are done using it, use 0102 * xcb_free_cursor. Calling @ref xcb_cursor_context_free () will NOT free the 0103 * created cursor. 0104 * 0105 */ 0106 xcb_cursor_t xcb_cursor_load_cursor(xcb_cursor_context_t *ctx, const char *name); 0107 0108 /** 0109 * Frees the @ref xcb_cursor_context_t. 0110 * 0111 * @param ctx The context to free. 0112 * 0113 */ 0114 void xcb_cursor_context_free(xcb_cursor_context_t *ctx); 0115 0116 /** 0117 * @} 0118 */ 0119 0120 #ifdef __cplusplus 0121 } 0122 #endif 0123 0124 #endif
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