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_image.h>
12 #include <xcb/xcb_atom.h>
13 #include <xcb/xcb_aux.h>
24 #include "unlock_indicator.h"
26 extern auth_state_t auth_state;
28 xcb_connection_t *conn;
31 #define curs_invisible_width 8
32 #define curs_invisible_height 8
34 static unsigned char curs_invisible_bits[] = {
35 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
37 #define curs_windows_width 11
38 #define curs_windows_height 19
40 static unsigned char curs_windows_bits[] = {
41 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
42 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
43 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
46 #define mask_windows_width 11
47 #define mask_windows_height 19
49 static unsigned char mask_windows_bits[] = {
50 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
51 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
52 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
55 static uint32_t get_colorpixel(char *hex) {
56 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
57 {hex[2], hex[3], '\0'},
58 {hex[4], hex[5], '\0'}};
59 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
60 (strtol(strgroups[1], NULL, 16)),
61 (strtol(strgroups[2], NULL, 16))};
63 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
66 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
67 xcb_visualtype_t *visual_type = NULL;
68 xcb_depth_iterator_t depth_iter;
69 xcb_visualtype_iterator_t visual_iter;
71 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
73 xcb_depth_next(&depth_iter)) {
74 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
76 xcb_visualtype_next(&visual_iter)) {
77 if (screen->root_visual != visual_iter.data->visual_id)
80 visual_type = visual_iter.data;
88 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) {
89 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
90 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
91 resolution[0], resolution[1]);
93 /* Generate a Graphics Context and fill the pixmap with background color
94 * (for images that are smaller than your screen) */
95 xcb_gcontext_t gc = xcb_generate_id(conn);
96 uint32_t values[] = {get_colorpixel(color)};
97 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
98 xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
99 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
100 xcb_free_gc(conn, gc);
105 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
108 xcb_window_t win = xcb_generate_id(conn);
110 if (pixmap == XCB_NONE) {
111 mask |= XCB_CW_BACK_PIXEL;
112 values[0] = get_colorpixel(color);
114 mask |= XCB_CW_BACK_PIXMAP;
118 mask |= XCB_CW_OVERRIDE_REDIRECT;
121 mask |= XCB_CW_EVENT_MASK;
122 values[2] = XCB_EVENT_MASK_EXPOSURE |
123 XCB_EVENT_MASK_KEY_PRESS |
124 XCB_EVENT_MASK_KEY_RELEASE |
125 XCB_EVENT_MASK_VISIBILITY_CHANGE |
126 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
128 xcb_create_window(conn,
129 XCB_COPY_FROM_PARENT,
130 win, /* the window id */
131 scr->root, /* parent == root */
133 scr->width_in_pixels,
134 scr->height_in_pixels, /* dimensions */
135 0, /* border = 0, we draw our own */
136 XCB_WINDOW_CLASS_INPUT_OUTPUT,
137 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
141 char *name = "i3lock";
142 xcb_change_property(conn,
143 XCB_PROP_MODE_REPLACE,
151 /* Map the window (= make it visible) */
152 xcb_map_window(conn, win);
154 /* Raise window (put it on top) */
155 values[0] = XCB_STACK_MODE_ABOVE;
156 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
158 /* Ensure that the window is created and set up before returning */
165 * Repeatedly tries to grab pointer and keyboard (up to 10000 times).
168 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
169 xcb_grab_pointer_cookie_t pcookie;
170 xcb_grab_pointer_reply_t *preply;
172 xcb_grab_keyboard_cookie_t kcookie;
173 xcb_grab_keyboard_reply_t *kreply;
177 /* Using few variables to trigger a redraw_screen() if too many tries */
178 bool redrawn = false;
179 time_t start = clock();
181 while (tries-- > 0) {
182 pcookie = xcb_grab_pointer(
184 false, /* get all pointer events specified by the following mask */
185 screen->root, /* grab the root window */
186 XCB_NONE, /* which events to let through */
187 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
188 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
189 XCB_NONE, /* confine_to = in which window should the cursor stay */
190 cursor, /* we change the cursor to whatever the user wanted */
193 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
194 preply->status == XCB_GRAB_STATUS_SUCCESS) {
199 /* Make this quite a bit slower */
202 /* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
204 (tries % 100) == 0 &&
205 (clock() - start) > 250000) {
211 while (tries-- > 0) {
212 kcookie = xcb_grab_keyboard(
214 true, /* report events */
215 screen->root, /* grab the root window */
217 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
218 XCB_GRAB_MODE_ASYNC);
220 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
221 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
226 /* Make this quite a bit slower */
229 /* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
231 (tries % 100) == 0 &&
232 (clock() - start) > 250000) {
238 /* After trying for 10000 times, i3lock will display an error message
239 * for 2 sec prior to terminate. */
241 auth_state = STATE_I3LOCK_LOCK_FAILED;
244 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
248 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
253 unsigned char *curs_bits;
254 unsigned char *mask_bits;
259 curs_bits = curs_invisible_bits;
260 mask_bits = curs_invisible_bits;
261 curs_w = curs_invisible_width;
262 curs_h = curs_invisible_height;
265 curs_bits = curs_windows_bits;
266 mask_bits = mask_windows_bits;
267 curs_w = curs_windows_width;
268 curs_h = curs_windows_height;
272 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
275 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
285 mask = xcb_create_pixmap_from_bitmap_data(conn,
295 cursor = xcb_generate_id(conn);
297 xcb_create_cursor(conn,
305 xcb_free_pixmap(conn, bitmap);
306 xcb_free_pixmap(conn, mask);