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>
22 xcb_connection_t *conn;
25 #define curs_invisible_width 8
26 #define curs_invisible_height 8
28 static unsigned char curs_invisible_bits[] = {
29 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
31 #define curs_windows_width 11
32 #define curs_windows_height 19
34 static unsigned char curs_windows_bits[] = {
35 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
36 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
37 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
40 #define mask_windows_width 11
41 #define mask_windows_height 19
43 static unsigned char mask_windows_bits[] = {
44 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
45 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
46 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
49 static uint32_t get_colorpixel(char *hex) {
50 char strgroups[3][3] = {{hex[0], hex[1], '\0'},
51 {hex[2], hex[3], '\0'},
52 {hex[4], hex[5], '\0'}};
53 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
54 (strtol(strgroups[1], NULL, 16)),
55 (strtol(strgroups[2], NULL, 16))};
57 return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
60 xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
61 xcb_visualtype_t *visual_type = NULL;
62 xcb_depth_iterator_t depth_iter;
63 xcb_visualtype_iterator_t visual_iter;
65 for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
67 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 /* Map the window (= make it visible) */
137 xcb_map_window(conn, win);
139 /* Raise window (put it on top) */
140 values[0] = XCB_STACK_MODE_ABOVE;
141 xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
146 void dpms_turn_off_screen(xcb_connection_t *conn) {
147 xcb_dpms_enable(conn);
148 xcb_dpms_force_level(conn, XCB_DPMS_DPMS_MODE_OFF);
153 * Repeatedly tries to grab pointer and keyboard (up to 1000 times).
156 void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
157 xcb_grab_pointer_cookie_t pcookie;
158 xcb_grab_pointer_reply_t *preply;
160 xcb_grab_keyboard_cookie_t kcookie;
161 xcb_grab_keyboard_reply_t *kreply;
165 while (tries-- > 0) {
166 pcookie = xcb_grab_pointer(
168 false, /* get all pointer events specified by the following mask */
169 screen->root, /* grab the root window */
170 XCB_NONE, /* which events to let through */
171 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
172 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
173 XCB_NONE, /* confine_to = in which window should the cursor stay */
174 cursor, /* we change the cursor to whatever the user wanted */
178 if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
179 preply->status == XCB_GRAB_STATUS_SUCCESS) {
184 /* Make this quite a bit slower */
188 while (tries-- > 0) {
189 kcookie = xcb_grab_keyboard(
191 true, /* report events */
192 screen->root, /* grab the root window */
194 XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
198 if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
199 kreply->status == XCB_GRAB_STATUS_SUCCESS) {
204 /* Make this quite a bit slower */
209 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
212 xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
217 unsigned char* curs_bits;
218 unsigned char* mask_bits;
223 curs_bits = curs_invisible_bits;
224 mask_bits = curs_invisible_bits;
225 curs_w = curs_invisible_width;
226 curs_h = curs_invisible_height;
229 curs_bits = curs_windows_bits;
230 mask_bits = mask_windows_bits;
231 curs_w = curs_windows_width;
232 curs_h = curs_windows_height;
236 return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
239 bitmap = xcb_create_pixmap_from_bitmap_data(conn,
249 mask = xcb_create_pixmap_from_bitmap_data(conn,
259 cursor = xcb_generate_id(conn);
261 xcb_create_cursor(conn,
269 xcb_free_pixmap(conn, bitmap);
270 xcb_free_pixmap(conn, mask);