b2c5ee47 |
1 | #include <stdio.h> |
2 | #include <string.h> |
3 | #include <pthread.h> |
4 | #include <dlfcn.h> |
5 | #include <X11/Xlib.h> |
6 | #include <X11/Xutil.h> |
7 | |
8 | #define FPTR(f) typeof(f) * p##f |
9 | #define FPTR_LINK(xf, dl, f) { \ |
10 | xf.p##f = dlsym(dl, #f); \ |
11 | if (xf.p##f == NULL) { \ |
12 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
13 | goto fail; \ |
14 | } \ |
15 | } |
16 | |
17 | struct xfuncs { |
18 | FPTR(XCreateBitmapFromData); |
19 | FPTR(XCreatePixmapCursor); |
20 | FPTR(XFreePixmap); |
21 | FPTR(XOpenDisplay); |
22 | FPTR(XDisplayName); |
23 | FPTR(XCloseDisplay); |
24 | FPTR(XCreateSimpleWindow); |
25 | FPTR(XChangeWindowAttributes); |
26 | FPTR(XSelectInput); |
27 | FPTR(XMapWindow); |
28 | FPTR(XNextEvent); |
29 | FPTR(XCheckTypedEvent); |
30 | FPTR(XUnmapWindow); |
31 | FPTR(XGrabKeyboard); |
32 | }; |
33 | |
34 | |
35 | static Cursor transparent_cursor(struct xfuncs *xf, Display *display, Window win) |
36 | { |
37 | Cursor cursor; |
38 | Pixmap pix; |
39 | XColor dummy; |
40 | char d = 0; |
41 | |
42 | memset(&dummy, 0, sizeof(dummy)); |
43 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
44 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
45 | &dummy, &dummy, 0, 0); |
46 | xf->pXFreePixmap(display, pix); |
47 | return cursor; |
48 | } |
49 | |
50 | static void *x11h_handler(void *arg) |
51 | { |
52 | struct xfuncs xf; |
53 | unsigned int display_width, display_height; |
54 | XSetWindowAttributes attributes; |
55 | Window win; |
56 | XEvent report; |
57 | Display *display; |
58 | Visual *visual; |
59 | void *x11lib; |
60 | int screen; |
61 | |
62 | memset(&xf, 0, sizeof(xf)); |
63 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
64 | if (x11lib == NULL) { |
65 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
66 | goto fail; |
67 | } |
68 | FPTR_LINK(xf, x11lib, XCreateBitmapFromData); |
69 | FPTR_LINK(xf, x11lib, XCreatePixmapCursor); |
70 | FPTR_LINK(xf, x11lib, XFreePixmap); |
71 | FPTR_LINK(xf, x11lib, XOpenDisplay); |
72 | FPTR_LINK(xf, x11lib, XDisplayName); |
73 | FPTR_LINK(xf, x11lib, XCloseDisplay); |
74 | FPTR_LINK(xf, x11lib, XCreateSimpleWindow); |
75 | FPTR_LINK(xf, x11lib, XChangeWindowAttributes); |
76 | FPTR_LINK(xf, x11lib, XSelectInput); |
77 | FPTR_LINK(xf, x11lib, XMapWindow); |
78 | FPTR_LINK(xf, x11lib, XNextEvent); |
79 | FPTR_LINK(xf, x11lib, XCheckTypedEvent); |
80 | FPTR_LINK(xf, x11lib, XUnmapWindow); |
81 | FPTR_LINK(xf, x11lib, XGrabKeyboard); |
82 | |
83 | //XInitThreads(); |
84 | |
85 | display = xf.pXOpenDisplay(NULL); |
86 | if (display == NULL) |
87 | { |
88 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
89 | xf.pXDisplayName(NULL)); |
90 | goto fail2; |
91 | } |
92 | |
93 | visual = DefaultVisual(display, 0); |
94 | if (visual->class != TrueColor) |
95 | { |
96 | fprintf(stderr, "cannot handle non true color visual\n"); |
97 | xf.pXCloseDisplay(display); |
98 | goto fail2; |
99 | } |
100 | |
101 | printf("x11h: X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
102 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
103 | ProtocolRevision(display)); |
104 | |
105 | screen = DefaultScreen(display); |
106 | |
107 | display_width = DisplayWidth(display, screen); |
108 | display_height = DisplayHeight(display, screen); |
109 | printf("x11h: display is %dx%d\n", display_width, display_height); |
110 | |
111 | win = xf.pXCreateSimpleWindow(display, |
112 | RootWindow(display, screen), |
113 | 0, 0, display_width, display_height, 0, |
114 | BlackPixel(display, screen), |
115 | BlackPixel(display, screen)); |
116 | |
117 | attributes.override_redirect = True; |
118 | attributes.cursor = transparent_cursor(&xf, display, win); |
119 | xf.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
120 | |
121 | xf.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask); |
122 | xf.pXMapWindow(display, win); |
123 | xf.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
124 | // XSetIOErrorHandler |
125 | |
126 | while (1) |
127 | { |
128 | xf.pXNextEvent(display, &report); |
129 | switch (report.type) |
130 | { |
131 | case Expose: |
132 | while (xf.pXCheckTypedEvent(display, Expose, &report)) |
133 | ; |
134 | break; |
135 | |
136 | case FocusOut: |
137 | // XFocusChangeEvent |
138 | // printf("focus out\n"); |
139 | // xf.pXUnmapWindow(display, win); |
140 | break; |
141 | |
142 | case KeyPress: |
143 | // printf("press %d\n", report.xkey.keycode); |
144 | break; |
145 | |
146 | default: |
147 | break; |
148 | } |
149 | } |
150 | |
151 | fail2: |
152 | dlclose(x11lib); |
153 | fail: |
154 | fprintf(stderr, "x11 handling disabled.\n"); |
155 | return NULL; |
156 | } |
157 | |
158 | int x11h_init(void) |
159 | { |
160 | pthread_t tid; |
161 | int ret; |
162 | |
163 | ret = pthread_create(&tid, NULL, x11h_handler, NULL); |
164 | if (ret != 0) { |
165 | fprintf(stderr, "x11h: failed to create thread: %d\n", ret); |
166 | return ret; |
167 | } |
168 | pthread_detach(tid); |
169 | |
170 | return 0; |
171 | } |
172 | |
173 | #if 0 |
174 | int main() |
175 | { |
176 | x11h_init(); |
177 | sleep(5); |
178 | } |
179 | #endif |