2 * vim:ts=4:sw=4:expandtab
4 * © 2010 Michael Stapelberg
6 * xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers
7 * around the rather complicated/ugly parts of the XCB API.
11 #include <xcb/xcb_keysyms.h>
12 #include <xcb/xcb_image.h>
23 #define curs_invisible_width 8
24 #define curs_invisible_height 8
26 static unsigned char curs_invisible_bits[] = {
27 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
29 #define curs_windows_width 11
30 #define curs_windows_height 19
32 static unsigned char curs_windows_bits[] = {
33 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
34 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
35 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
38 #define mask_windows_width 11
39 #define mask_windows_height 19
41 static unsigned char mask_windows_bits[] = {
42 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
43 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
44 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
47 static uint32_t get_colorpixel(char *hex) {
48 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
49 {hex[2], hex[3], '\0'},
50 {hex[4], hex[5], '\0'}};
51 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
52 (strtol(strgroups[1], NULL, 16)),
53 (strtol(strgroups[2], NULL, 16))};
55 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
58 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
59 xcb_visualtype_t *visual_type = NULL;
60 xcb_depth_iterator_t depth_iter;
61 xcb_visualtype_iterator_t visual_iter;
63 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
65 xcb_depth_next(&depth_iter)) {
67 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
69 xcb_visualtype_next(&visual_iter)) {
70 if (screen->root_visual != visual_iter.data->visual_id)
73 visual_type = visual_iter.data;
81 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color) {
84 xcb_window_t win = xcb_generate_id(conn);
86 mask |= XCB_CW_BACK_PIXEL;
87 values[0] = get_colorpixel(color);
89 mask |= XCB_CW_OVERRIDE_REDIRECT;
92 mask |= XCB_CW_EVENT_MASK;
93 values[2] = XCB_EVENT_MASK_EXPOSURE |
94 XCB_EVENT_MASK_KEY_PRESS |
95 XCB_EVENT_MASK_KEY_RELEASE |
96 XCB_EVENT_MASK_VISIBILITY_CHANGE;
98 xcb_create_window(conn,
100 win, /* the window id */
101 scr->root, /* parent == root */
103 scr->width_in_pixels,
104 scr->height_in_pixels, /* dimensions */
105 0, /* border = 0, we draw our own */
106 XCB_WINDOW_CLASS_INPUT_OUTPUT,
107 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
111 /* Map the window (= make it visible) */
112 xcb_map_window(conn, win);
114 /* Raise window (put it on top) */
115 values[0] = XCB_STACK_MODE_ABOVE;
116 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
122 * Returns the mask for Mode_switch (to be used for looking up keysymbols by
126 uint32_t get_mod_mask(xcb_connection_t *conn, xcb_key_symbols_t *symbols, uint32_t keycode) {
127 xcb_get_modifier_mapping_reply_t *modmap_r;
128 xcb_keycode_t *modmap, kc;
129 xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(symbols, keycode);
130 if (modeswitchcodes == NULL)
133 modmap_r = xcb_get_modifier_mapping_reply(conn, xcb_get_modifier_mapping(conn), NULL);
134 modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
136 for (int i = 0; i < 8; i++)
137 for (int j = 0; j < modmap_r->keycodes_per_modifier; j++) {
138 kc = modmap[i * modmap_r->keycodes_per_modifier + j];
139 for (xcb_keycode_t *ktest = modeswitchcodes; *ktest; ktest++) {
143 free(modeswitchcodes);
152 void dpms_turn_off_screen(xcb_connection_t *conn) {
153 xcb_dpms_enable(conn);
154 xcb_dpms_force_level(conn, XCB_DPMS_DPMS_MODE_OFF);
159 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
162 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
163 xcb_grab_pointer_cookie_t pcookie;
164 xcb_grab_pointer_reply_t *preply;
166 xcb_grab_keyboard_cookie_t kcookie;
167 xcb_grab_keyboard_reply_t *kreply;
171 while (tries-- > 0) {
172 pcookie = xcb_grab_pointer(
174 false, /* get all pointer events specified by the following mask */
175 screen->root, /* grab the root window */
176 XCB_NONE, /* which events to let through */
177 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
178 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
179 XCB_NONE, /* confine_to = in which window should the cursor stay */
180 cursor, /* we change the cursor to whatever the user wanted */
184 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
185 preply->status == XCB_GRAB_STATUS_SUCCESS) {
190 /* Make this quite a bit slower */
194 if (cursor != XCB_NONE)
195 xcb_free_cursor(conn, cursor);
197 while (tries-- > 0) {
198 kcookie = xcb_grab_keyboard(
200 true, /* report events */
201 screen->root, /* grab the root window */
203 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
207 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
208 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
213 /* Make this quite a bit slower */
218 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
221 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
226 unsigned char* curs_bits;
227 unsigned char* mask_bits;
232 curs_bits = curs_invisible_bits;
233 mask_bits = curs_invisible_bits;
234 curs_w = curs_invisible_width;
235 curs_h = curs_invisible_height;
238 curs_bits = curs_windows_bits;
239 mask_bits = mask_windows_bits;
240 curs_w = curs_windows_width;
241 curs_h = curs_windows_height;
245 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
248 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
258 mask = xcb_create_pixmap_from_bitmap_data(conn,
268 cursor = xcb_generate_id(conn);
270 xcb_create_cursor(conn,
278 xcb_free_pixmap(conn, bitmap);
279 xcb_free_pixmap(conn, mask);