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>
23 xcb_connection_t *conn;
26 #define curs_invisible_width 8
27 #define curs_invisible_height 8
29 static unsigned char curs_invisible_bits[] = {
30 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
32 #define curs_windows_width 11
33 #define curs_windows_height 19
35 static unsigned char curs_windows_bits[] = {
36 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
37 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
38 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
41 #define mask_windows_width 11
42 #define mask_windows_height 19
44 static unsigned char mask_windows_bits[] = {
45 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
46 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
47 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
50 static uint32_t get_colorpixel(char *hex) {
51 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
52 {hex[2], hex[3], '\0'},
53 {hex[4], hex[5], '\0'}};
54 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
55 (strtol(strgroups[1], NULL, 16)),
56 (strtol(strgroups[2], NULL, 16))};
58 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
61 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
62 xcb_visualtype_t *visual_type = NULL;
63 xcb_depth_iterator_t depth_iter;
64 xcb_visualtype_iterator_t visual_iter;
66 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
68 xcb_depth_next(&depth_iter)) {
69 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
71 xcb_visualtype_next(&visual_iter)) {
72 if (screen->root_visual != visual_iter.data->visual_id)
75 visual_type = visual_iter.data;
83 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) {
84 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
85 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
86 resolution[0], resolution[1]);
88 /* Generate a Graphics Context and fill the pixmap with background color
89 * (for images that are smaller than your screen) */
90 xcb_gcontext_t gc = xcb_generate_id(conn);
91 uint32_t values[] = {get_colorpixel(color)};
92 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
93 xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
94 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
95 xcb_free_gc(conn, gc);
100 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
103 xcb_window_t win = xcb_generate_id(conn);
105 if (pixmap == XCB_NONE) {
106 mask |= XCB_CW_BACK_PIXEL;
107 values[0] = get_colorpixel(color);
109 mask |= XCB_CW_BACK_PIXMAP;
113 mask |= XCB_CW_OVERRIDE_REDIRECT;
116 mask |= XCB_CW_EVENT_MASK;
117 values[2] = XCB_EVENT_MASK_EXPOSURE |
118 XCB_EVENT_MASK_KEY_PRESS |
119 XCB_EVENT_MASK_KEY_RELEASE |
120 XCB_EVENT_MASK_VISIBILITY_CHANGE |
121 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
123 xcb_create_window(conn,
124 XCB_COPY_FROM_PARENT,
125 win, /* the window id */
126 scr->root, /* parent == root */
128 scr->width_in_pixels,
129 scr->height_in_pixels, /* dimensions */
130 0, /* border = 0, we draw our own */
131 XCB_WINDOW_CLASS_INPUT_OUTPUT,
132 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
136 char *name = "i3lock";
137 xcb_change_property(conn,
138 XCB_PROP_MODE_REPLACE,
146 /* Map the window (= make it visible) */
147 xcb_map_window(conn, win);
149 /* Raise window (put it on top) */
150 values[0] = XCB_STACK_MODE_ABOVE;
151 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
157 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
160 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
161 xcb_grab_pointer_cookie_t pcookie;
162 xcb_grab_pointer_reply_t *preply;
164 xcb_grab_keyboard_cookie_t kcookie;
165 xcb_grab_keyboard_reply_t *kreply;
169 while (tries-- > 0) {
170 pcookie = xcb_grab_pointer(
172 false, /* get all pointer events specified by the following mask */
173 screen->root, /* grab the root window */
174 XCB_NONE, /* which events to let through */
175 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
176 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
177 XCB_NONE, /* confine_to = in which window should the cursor stay */
178 cursor, /* we change the cursor to whatever the user wanted */
181 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
182 preply->status == XCB_GRAB_STATUS_SUCCESS) {
187 /* Make this quite a bit slower */
191 while (tries-- > 0) {
192 kcookie = xcb_grab_keyboard(
194 true, /* report events */
195 screen->root, /* grab the root window */
197 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
198 XCB_GRAB_MODE_ASYNC);
200 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
201 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
206 /* Make this quite a bit slower */
211 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
214 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
219 unsigned char *curs_bits;
220 unsigned char *mask_bits;
225 curs_bits = curs_invisible_bits;
226 mask_bits = curs_invisible_bits;
227 curs_w = curs_invisible_width;
228 curs_h = curs_invisible_height;
231 curs_bits = curs_windows_bits;
232 mask_bits = mask_windows_bits;
233 curs_w = curs_windows_width;
234 curs_h = curs_windows_height;
238 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
241 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
251 mask = xcb_create_pixmap_from_bitmap_data(conn,
261 cursor = xcb_generate_id(conn);
263 xcb_create_cursor(conn,
271 xcb_free_pixmap(conn, bitmap);
272 xcb_free_pixmap(conn, mask);