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_keysyms.h>
12 #include <xcb/xcb_image.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)) {
70 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
72 xcb_visualtype_next(&visual_iter)) {
73 if (screen->root_visual != visual_iter.data->visual_id)
76 visual_type = visual_iter.data;
84 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t* resolution, char *color) {
85 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
86 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
87 resolution[0], resolution[1]);
89 /* Generate a Graphics Context and fill the pixmap with background color
90 * (for images that are smaller than your screen) */
91 xcb_gcontext_t gc = xcb_generate_id(conn);
92 uint32_t values[] = { get_colorpixel(color) };
93 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
94 xcb_rectangle_t rect = { 0, 0, resolution[0], resolution[1] };
95 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
96 xcb_free_gc(conn, gc);
101 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
104 xcb_window_t win = xcb_generate_id(conn);
106 if (pixmap == XCB_NONE) {
107 mask |= XCB_CW_BACK_PIXEL;
108 values[0] = get_colorpixel(color);
110 mask |= XCB_CW_BACK_PIXMAP;
114 mask |= XCB_CW_OVERRIDE_REDIRECT;
117 mask |= XCB_CW_EVENT_MASK;
118 values[2] = XCB_EVENT_MASK_EXPOSURE |
119 XCB_EVENT_MASK_KEY_PRESS |
120 XCB_EVENT_MASK_KEY_RELEASE |
121 XCB_EVENT_MASK_VISIBILITY_CHANGE |
122 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
124 xcb_create_window(conn,
125 XCB_COPY_FROM_PARENT,
126 win, /* the window id */
127 scr->root, /* parent == root */
129 scr->width_in_pixels,
130 scr->height_in_pixels, /* dimensions */
131 0, /* border = 0, we draw our own */
132 XCB_WINDOW_CLASS_INPUT_OUTPUT,
133 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
137 /* Map the window (= make it visible) */
138 xcb_map_window(conn, win);
140 /* Raise window (put it on top) */
141 values[0] = XCB_STACK_MODE_ABOVE;
142 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
148 * Returns the mask for Mode_switch (to be used for looking up keysymbols by
152 uint32_t get_mod_mask(xcb_connection_t *conn, xcb_key_symbols_t *symbols, uint32_t keycode) {
153 xcb_get_modifier_mapping_reply_t *modmap_r;
154 xcb_keycode_t *modmap, kc;
155 xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(symbols, keycode);
156 if (modeswitchcodes == NULL)
159 modmap_r = xcb_get_modifier_mapping_reply(conn, xcb_get_modifier_mapping(conn), NULL);
160 modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
162 for (int i = 0; i < 8; i++)
163 for (int j = 0; j < modmap_r->keycodes_per_modifier; j++) {
164 kc = modmap[i * modmap_r->keycodes_per_modifier + j];
165 for (xcb_keycode_t *ktest = modeswitchcodes; *ktest; ktest++) {
169 free(modeswitchcodes);
175 free(modeswitchcodes);
180 void dpms_turn_off_screen(xcb_connection_t *conn) {
181 xcb_dpms_enable(conn);
182 xcb_dpms_force_level(conn, XCB_DPMS_DPMS_MODE_OFF);
187 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
190 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
191 xcb_grab_pointer_cookie_t pcookie;
192 xcb_grab_pointer_reply_t *preply;
194 xcb_grab_keyboard_cookie_t kcookie;
195 xcb_grab_keyboard_reply_t *kreply;
199 while (tries-- > 0) {
200 pcookie = xcb_grab_pointer(
202 false, /* get all pointer events specified by the following mask */
203 screen->root, /* grab the root window */
204 XCB_NONE, /* which events to let through */
205 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
206 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
207 XCB_NONE, /* confine_to = in which window should the cursor stay */
208 cursor, /* we change the cursor to whatever the user wanted */
212 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
213 preply->status == XCB_GRAB_STATUS_SUCCESS) {
218 /* Make this quite a bit slower */
222 while (tries-- > 0) {
223 kcookie = xcb_grab_keyboard(
225 true, /* report events */
226 screen->root, /* grab the root window */
228 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
232 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
233 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
238 /* Make this quite a bit slower */
243 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
246 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
251 unsigned char* curs_bits;
252 unsigned char* mask_bits;
257 curs_bits = curs_invisible_bits;
258 mask_bits = curs_invisible_bits;
259 curs_w = curs_invisible_width;
260 curs_h = curs_invisible_height;
263 curs_bits = curs_windows_bits;
264 mask_bits = mask_windows_bits;
265 curs_w = curs_windows_width;
266 curs_h = curs_windows_height;
270 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
273 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
283 mask = xcb_create_pixmap_from_bitmap_data(conn,
293 cursor = xcb_generate_id(conn);
295 xcb_create_cursor(conn,
303 xcb_free_pixmap(conn, bitmap);
304 xcb_free_pixmap(conn, mask);