2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2012 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>
24 xcb_connection_t *conn;
27 #define curs_invisible_width 8
28 #define curs_invisible_height 8
30 static unsigned char curs_invisible_bits[] = {
31 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
33 #define curs_windows_width 11
34 #define curs_windows_height 19
36 static unsigned char curs_windows_bits[] = {
37 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
38 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
39 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
42 #define mask_windows_width 11
43 #define mask_windows_height 19
45 static unsigned char mask_windows_bits[] = {
46 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
47 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
48 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
51 static uint32_t get_colorpixel(char *hex) {
52 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
53 {hex[2], hex[3], '\0'},
54 {hex[4], hex[5], '\0'}};
55 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
56 (strtol(strgroups[1], NULL, 16)),
57 (strtol(strgroups[2], NULL, 16))};
59 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
62 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
63 xcb_visualtype_t *visual_type = NULL;
64 xcb_depth_iterator_t depth_iter;
65 xcb_visualtype_iterator_t visual_iter;
67 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
69 xcb_depth_next(&depth_iter)) {
71 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
73 xcb_visualtype_next(&visual_iter)) {
74 if (screen->root_visual != visual_iter.data->visual_id)
77 visual_type = visual_iter.data;
85 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t* resolution, char *color) {
86 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
87 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
88 resolution[0], resolution[1]);
90 /* Generate a Graphics Context and fill the pixmap with background color
91 * (for images that are smaller than your screen) */
92 xcb_gcontext_t gc = xcb_generate_id(conn);
93 uint32_t values[] = { get_colorpixel(color) };
94 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
95 xcb_rectangle_t rect = { 0, 0, resolution[0], resolution[1] };
96 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
97 xcb_free_gc(conn, gc);
102 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
105 xcb_window_t win = xcb_generate_id(conn);
107 if (pixmap == XCB_NONE) {
108 mask |= XCB_CW_BACK_PIXEL;
109 values[0] = get_colorpixel(color);
111 mask |= XCB_CW_BACK_PIXMAP;
115 mask |= XCB_CW_OVERRIDE_REDIRECT;
118 mask |= XCB_CW_EVENT_MASK;
119 values[2] = XCB_EVENT_MASK_EXPOSURE |
120 XCB_EVENT_MASK_KEY_PRESS |
121 XCB_EVENT_MASK_KEY_RELEASE |
122 XCB_EVENT_MASK_VISIBILITY_CHANGE |
123 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
125 xcb_create_window(conn,
126 XCB_COPY_FROM_PARENT,
127 win, /* the window id */
128 scr->root, /* parent == root */
130 scr->width_in_pixels,
131 scr->height_in_pixels, /* dimensions */
132 0, /* border = 0, we draw our own */
133 XCB_WINDOW_CLASS_INPUT_OUTPUT,
134 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
138 char *name = "i3lock";
139 xcb_change_property(conn,
140 XCB_PROP_MODE_REPLACE,
148 /* Map the window (= make it visible) */
149 xcb_map_window(conn, win);
151 /* Raise window (put it on top) */
152 values[0] = XCB_STACK_MODE_ABOVE;
153 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
159 * Set the dpms level to 'mode'.
162 void dpms_set_mode(xcb_connection_t *conn, xcb_dpms_dpms_mode_t mode) {
163 xcb_dpms_enable(conn);
164 xcb_dpms_force_level(conn, mode);
169 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
172 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
173 xcb_grab_pointer_cookie_t pcookie;
174 xcb_grab_pointer_reply_t *preply;
176 xcb_grab_keyboard_cookie_t kcookie;
177 xcb_grab_keyboard_reply_t *kreply;
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 */
194 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
195 preply->status == XCB_GRAB_STATUS_SUCCESS) {
200 /* Make this quite a bit slower */
204 while (tries-- > 0) {
205 kcookie = xcb_grab_keyboard(
207 true, /* report events */
208 screen->root, /* grab the root window */
210 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
214 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
215 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
220 /* Make this quite a bit slower */
225 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
228 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
233 unsigned char* curs_bits;
234 unsigned char* mask_bits;
239 curs_bits = curs_invisible_bits;
240 mask_bits = curs_invisible_bits;
241 curs_w = curs_invisible_width;
242 curs_h = curs_invisible_height;
245 curs_bits = curs_windows_bits;
246 mask_bits = mask_windows_bits;
247 curs_w = curs_windows_width;
248 curs_h = curs_windows_height;
252 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
255 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
265 mask = xcb_create_pixmap_from_bitmap_data(conn,
275 cursor = xcb_generate_id(conn);
277 xcb_create_cursor(conn,
285 xcb_free_pixmap(conn, bitmap);
286 xcb_free_pixmap(conn, mask);