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>
14 #include <xcb/composite.h>
25 #include "unlock_indicator.h"
27 extern pam_state_t pam_state;
29 xcb_connection_t *conn;
32 #define curs_invisible_width 8
33 #define curs_invisible_height 8
35 static unsigned char curs_invisible_bits[] = {
36 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
38 #define curs_windows_width 11
39 #define curs_windows_height 19
41 static unsigned char curs_windows_bits[] = {
42 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
43 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
44 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
47 #define mask_windows_width 11
48 #define mask_windows_height 19
50 static unsigned char mask_windows_bits[] = {
51 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
52 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
53 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
56 static uint32_t get_colorpixel(char *hex) {
57 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
58 {hex[2], hex[3], '\0'},
59 {hex[4], hex[5], '\0'}};
60 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
61 (strtol(strgroups[1], NULL, 16)),
62 (strtol(strgroups[2], NULL, 16))};
64 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
67 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
68 xcb_visualtype_t *visual_type = NULL;
69 xcb_depth_iterator_t depth_iter;
70 xcb_visualtype_iterator_t visual_iter;
72 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
74 xcb_depth_next(&depth_iter)) {
75 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
77 xcb_visualtype_next(&visual_iter)) {
78 if (screen->root_visual != visual_iter.data->visual_id)
81 visual_type = visual_iter.data;
89 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) {
90 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
91 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
92 resolution[0], resolution[1]);
94 /* Generate a Graphics Context and fill the pixmap with background color
95 * (for images that are smaller than your screen) */
96 xcb_gcontext_t gc = xcb_generate_id(conn);
97 uint32_t values[] = {get_colorpixel(color)};
98 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
99 xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
100 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
101 xcb_free_gc(conn, gc);
106 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
109 xcb_window_t win = xcb_generate_id(conn);
110 xcb_window_t parent_win = scr->root;
112 /* Check whether the composite extension is available */
113 const xcb_query_extension_reply_t *extension_query = NULL;
114 xcb_generic_error_t *error = NULL;
115 xcb_composite_get_overlay_window_cookie_t cookie;
116 xcb_composite_get_overlay_window_reply_t *composite_reply = NULL;
118 extension_query = xcb_get_extension_data(conn, &xcb_composite_id);
119 if (extension_query && extension_query->present) {
120 /* When composition is used, we need to use the composite overlay
121 * window instead of the normal root window to be able to cover
122 * composited windows */
123 cookie = xcb_composite_get_overlay_window(conn, scr->root);
124 composite_reply = xcb_composite_get_overlay_window_reply(conn, cookie, &error);
126 if (!error && composite_reply) {
127 parent_win = composite_reply->overlay_win;
130 free(composite_reply);
134 if (pixmap == XCB_NONE) {
135 mask |= XCB_CW_BACK_PIXEL;
136 values[0] = get_colorpixel(color);
138 mask |= XCB_CW_BACK_PIXMAP;
142 mask |= XCB_CW_OVERRIDE_REDIRECT;
145 mask |= XCB_CW_EVENT_MASK;
146 values[2] = XCB_EVENT_MASK_EXPOSURE |
147 XCB_EVENT_MASK_KEY_PRESS |
148 XCB_EVENT_MASK_KEY_RELEASE |
149 XCB_EVENT_MASK_VISIBILITY_CHANGE |
150 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
152 xcb_create_window(conn,
153 XCB_COPY_FROM_PARENT,
154 win, /* the window id */
157 scr->width_in_pixels,
158 scr->height_in_pixels, /* dimensions */
159 0, /* border = 0, we draw our own */
160 XCB_WINDOW_CLASS_INPUT_OUTPUT,
161 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
165 char *name = "i3lock";
166 xcb_change_property(conn,
167 XCB_PROP_MODE_REPLACE,
175 /* Map the window (= make it visible) */
176 xcb_map_window(conn, win);
178 /* Raise window (put it on top) */
179 values[0] = XCB_STACK_MODE_ABOVE;
180 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
182 /* Ensure that the window is created and set up before returning */
189 * Repeatedly tries to grab pointer and keyboard (up to 10000 times).
192 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
193 xcb_grab_pointer_cookie_t pcookie;
194 xcb_grab_pointer_reply_t *preply;
196 xcb_grab_keyboard_cookie_t kcookie;
197 xcb_grab_keyboard_reply_t *kreply;
201 /* Using few variables to trigger a redraw_screen() if too many tries */
202 bool redrawn = false;
203 time_t start = clock();
205 while (tries-- > 0) {
206 pcookie = xcb_grab_pointer(
208 false, /* get all pointer events specified by the following mask */
209 screen->root, /* grab the root window */
210 XCB_NONE, /* which events to let through */
211 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
212 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
213 XCB_NONE, /* confine_to = in which window should the cursor stay */
214 cursor, /* we change the cursor to whatever the user wanted */
217 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
218 preply->status == XCB_GRAB_STATUS_SUCCESS) {
223 /* Make this quite a bit slower */
226 /* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
228 (tries % 100) == 0 &&
229 (clock() - start) > 250000) {
235 while (tries-- > 0) {
236 kcookie = xcb_grab_keyboard(
238 true, /* report events */
239 screen->root, /* grab the root window */
241 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
242 XCB_GRAB_MODE_ASYNC);
244 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
245 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
250 /* Make this quite a bit slower */
253 /* Measure elapsed time and trigger a screen redraw if elapsed > 250000 */
255 (tries % 100) == 0 &&
256 (clock() - start) > 250000) {
262 /* After trying for 10000 times, i3lock will display an error message
263 * for 2 sec prior to terminate. */
265 pam_state = STATE_I3LOCK_LOCK_FAILED;
268 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
272 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
277 unsigned char *curs_bits;
278 unsigned char *mask_bits;
283 curs_bits = curs_invisible_bits;
284 mask_bits = curs_invisible_bits;
285 curs_w = curs_invisible_width;
286 curs_h = curs_invisible_height;
289 curs_bits = curs_windows_bits;
290 mask_bits = mask_windows_bits;
291 curs_w = curs_windows_width;
292 curs_h = curs_windows_height;
296 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
299 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
309 mask = xcb_create_pixmap_from_bitmap_data(conn,
319 cursor = xcb_generate_id(conn);
321 xcb_create_cursor(conn,
329 xcb_free_pixmap(conn, bitmap);
330 xcb_free_pixmap(conn, mask);