2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2011 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 #define curs_invisible_width 8
24 #define curs_invisible_height 8
26 static unsigned char curs_invisible_bits[] = {
27 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
29 #define curs_windows_width 11
30 #define curs_windows_height 19
32 static unsigned char curs_windows_bits[] = {
33 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
34 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
35 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
38 #define mask_windows_width 11
39 #define mask_windows_height 19
41 static unsigned char mask_windows_bits[] = {
42 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
43 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
44 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
47 static uint32_t get_colorpixel(char *hex) {
48 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
49 {hex[2], hex[3], '\0'},
50 {hex[4], hex[5], '\0'}};
51 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
52 (strtol(strgroups[1], NULL, 16)),
53 (strtol(strgroups[2], NULL, 16))};
55 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
58 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
59 xcb_visualtype_t *visual_type = NULL;
60 xcb_depth_iterator_t depth_iter;
61 xcb_visualtype_iterator_t visual_iter;
63 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
65 xcb_depth_next(&depth_iter)) {
67 for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
69 xcb_visualtype_next(&visual_iter)) {
70 if (screen->root_visual != visual_iter.data->visual_id)
73 visual_type = visual_iter.data;
81 xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t* resolution, char *color) {
82 xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
83 xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
84 resolution[0], resolution[1]);
86 /* Generate a Graphics Context and fill the pixmap with background color
87 * (for images that are smaller than your screen) */
88 xcb_gcontext_t gc = xcb_generate_id(conn);
89 uint32_t values[] = { get_colorpixel(color) };
90 xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
91 xcb_rectangle_t rect = { 0, 0, resolution[0], resolution[1] };
92 xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
93 xcb_free_gc(conn, gc);
98 xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
101 xcb_window_t win = xcb_generate_id(conn);
103 if (pixmap == XCB_NONE) {
104 mask |= XCB_CW_BACK_PIXEL;
105 values[0] = get_colorpixel(color);
107 mask |= XCB_CW_BACK_PIXMAP;
111 mask |= XCB_CW_OVERRIDE_REDIRECT;
114 mask |= XCB_CW_EVENT_MASK;
115 values[2] = XCB_EVENT_MASK_EXPOSURE |
116 XCB_EVENT_MASK_KEY_PRESS |
117 XCB_EVENT_MASK_KEY_RELEASE |
118 XCB_EVENT_MASK_VISIBILITY_CHANGE |
119 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
121 xcb_create_window(conn,
123 win, /* the window id */
124 scr->root, /* parent == root */
126 scr->width_in_pixels,
127 scr->height_in_pixels, /* dimensions */
128 0, /* border = 0, we draw our own */
129 XCB_WINDOW_CLASS_INPUT_OUTPUT,
130 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
134 /* Map the window (= make it visible) */
135 xcb_map_window(conn, win);
137 /* Raise window (put it on top) */
138 values[0] = XCB_STACK_MODE_ABOVE;
139 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
145 * Returns the mask for Mode_switch (to be used for looking up keysymbols by
149 uint32_t get_mod_mask(xcb_connection_t *conn, xcb_key_symbols_t *symbols, uint32_t keycode) {
150 xcb_get_modifier_mapping_reply_t *modmap_r;
151 xcb_keycode_t *modmap, kc;
152 xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(symbols, keycode);
153 if (modeswitchcodes == NULL)
156 modmap_r = xcb_get_modifier_mapping_reply(conn, xcb_get_modifier_mapping(conn), NULL);
157 modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
159 for (int i = 0; i < 8; i++)
160 for (int j = 0; j < modmap_r->keycodes_per_modifier; j++) {
161 kc = modmap[i * modmap_r->keycodes_per_modifier + j];
162 for (xcb_keycode_t *ktest = modeswitchcodes; *ktest; ktest++) {
166 free(modeswitchcodes);
175 void dpms_turn_off_screen(xcb_connection_t *conn) {
176 xcb_dpms_enable(conn);
177 xcb_dpms_force_level(conn, XCB_DPMS_DPMS_MODE_OFF);
182 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
185 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
186 xcb_grab_pointer_cookie_t pcookie;
187 xcb_grab_pointer_reply_t *preply;
189 xcb_grab_keyboard_cookie_t kcookie;
190 xcb_grab_keyboard_reply_t *kreply;
194 while (tries-- > 0) {
195 pcookie = xcb_grab_pointer(
197 false, /* get all pointer events specified by the following mask */
198 screen->root, /* grab the root window */
199 XCB_NONE, /* which events to let through */
200 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
201 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
202 XCB_NONE, /* confine_to = in which window should the cursor stay */
203 cursor, /* we change the cursor to whatever the user wanted */
207 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
208 preply->status == XCB_GRAB_STATUS_SUCCESS) {
213 /* Make this quite a bit slower */
217 while (tries-- > 0) {
218 kcookie = xcb_grab_keyboard(
220 true, /* report events */
221 screen->root, /* grab the root window */
223 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
227 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
228 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
233 /* Make this quite a bit slower */
238 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
241 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
246 unsigned char* curs_bits;
247 unsigned char* mask_bits;
252 curs_bits = curs_invisible_bits;
253 mask_bits = curs_invisible_bits;
254 curs_w = curs_invisible_width;
255 curs_h = curs_invisible_height;
258 curs_bits = curs_windows_bits;
259 mask_bits = mask_windows_bits;
260 curs_w = curs_windows_width;
261 curs_h = curs_windows_height;
265 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
268 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
278 mask = xcb_create_pixmap_from_bitmap_data(conn,
288 cursor = xcb_generate_id(conn);
290 xcb_create_cursor(conn,
298 xcb_free_pixmap(conn, bitmap);
299 xcb_free_pixmap(conn, mask);