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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2010 |
3 | * |
4 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. |
5 | * See the COPYING file in the top-level directory. |
6 | */ |
7 | |
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8 | #include <stdio.h> |
9 | #include <string.h> |
10 | #include <pthread.h> |
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11 | |
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12 | #include <dlfcn.h> |
13 | #include <X11/Xlib.h> |
14 | #include <X11/Xutil.h> |
15 | |
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16 | #include <sys/types.h> |
17 | #include <sys/stat.h> |
18 | #include <fcntl.h> |
19 | #include <unistd.h> |
20 | #include <sys/ioctl.h> |
21 | #include <termios.h> |
22 | #include <linux/kd.h> |
23 | |
24 | #define PFX "oshide: " |
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25 | |
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26 | #define FPTR(f) typeof(f) * p##f |
27 | #define FPTR_LINK(xf, dl, f) { \ |
28 | xf.p##f = dlsym(dl, #f); \ |
29 | if (xf.p##f == NULL) { \ |
30 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
31 | goto fail; \ |
32 | } \ |
33 | } |
34 | |
35 | struct xfuncs { |
36 | FPTR(XCreateBitmapFromData); |
37 | FPTR(XCreatePixmapCursor); |
38 | FPTR(XFreePixmap); |
39 | FPTR(XOpenDisplay); |
40 | FPTR(XDisplayName); |
41 | FPTR(XCloseDisplay); |
42 | FPTR(XCreateSimpleWindow); |
43 | FPTR(XChangeWindowAttributes); |
44 | FPTR(XSelectInput); |
45 | FPTR(XMapWindow); |
46 | FPTR(XNextEvent); |
47 | FPTR(XCheckTypedEvent); |
48 | FPTR(XUnmapWindow); |
49 | FPTR(XGrabKeyboard); |
50 | }; |
51 | |
52 | |
53 | static Cursor transparent_cursor(struct xfuncs *xf, Display *display, Window win) |
54 | { |
55 | Cursor cursor; |
56 | Pixmap pix; |
57 | XColor dummy; |
58 | char d = 0; |
59 | |
60 | memset(&dummy, 0, sizeof(dummy)); |
61 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
62 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
63 | &dummy, &dummy, 0, 0); |
64 | xf->pXFreePixmap(display, pix); |
65 | return cursor; |
66 | } |
67 | |
68 | static void *x11h_handler(void *arg) |
69 | { |
70 | struct xfuncs xf; |
71 | unsigned int display_width, display_height; |
72 | XSetWindowAttributes attributes; |
73 | Window win; |
74 | XEvent report; |
75 | Display *display; |
76 | Visual *visual; |
77 | void *x11lib; |
78 | int screen; |
79 | |
80 | memset(&xf, 0, sizeof(xf)); |
81 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
82 | if (x11lib == NULL) { |
83 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
84 | goto fail; |
85 | } |
86 | FPTR_LINK(xf, x11lib, XCreateBitmapFromData); |
87 | FPTR_LINK(xf, x11lib, XCreatePixmapCursor); |
88 | FPTR_LINK(xf, x11lib, XFreePixmap); |
89 | FPTR_LINK(xf, x11lib, XOpenDisplay); |
90 | FPTR_LINK(xf, x11lib, XDisplayName); |
91 | FPTR_LINK(xf, x11lib, XCloseDisplay); |
92 | FPTR_LINK(xf, x11lib, XCreateSimpleWindow); |
93 | FPTR_LINK(xf, x11lib, XChangeWindowAttributes); |
94 | FPTR_LINK(xf, x11lib, XSelectInput); |
95 | FPTR_LINK(xf, x11lib, XMapWindow); |
96 | FPTR_LINK(xf, x11lib, XNextEvent); |
97 | FPTR_LINK(xf, x11lib, XCheckTypedEvent); |
98 | FPTR_LINK(xf, x11lib, XUnmapWindow); |
99 | FPTR_LINK(xf, x11lib, XGrabKeyboard); |
100 | |
101 | //XInitThreads(); |
102 | |
103 | display = xf.pXOpenDisplay(NULL); |
104 | if (display == NULL) |
105 | { |
106 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
107 | xf.pXDisplayName(NULL)); |
108 | goto fail2; |
109 | } |
110 | |
111 | visual = DefaultVisual(display, 0); |
112 | if (visual->class != TrueColor) |
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113 | fprintf(stderr, PFX "warning: non true color visual\n"); |
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114 | |
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115 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
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116 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
117 | ProtocolRevision(display)); |
118 | |
119 | screen = DefaultScreen(display); |
120 | |
121 | display_width = DisplayWidth(display, screen); |
122 | display_height = DisplayHeight(display, screen); |
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123 | printf(PFX "display is %dx%d\n", display_width, display_height); |
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124 | |
125 | win = xf.pXCreateSimpleWindow(display, |
126 | RootWindow(display, screen), |
127 | 0, 0, display_width, display_height, 0, |
128 | BlackPixel(display, screen), |
129 | BlackPixel(display, screen)); |
130 | |
131 | attributes.override_redirect = True; |
132 | attributes.cursor = transparent_cursor(&xf, display, win); |
133 | xf.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
134 | |
135 | xf.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask); |
136 | xf.pXMapWindow(display, win); |
137 | xf.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
138 | // XSetIOErrorHandler |
139 | |
140 | while (1) |
141 | { |
142 | xf.pXNextEvent(display, &report); |
143 | switch (report.type) |
144 | { |
145 | case Expose: |
146 | while (xf.pXCheckTypedEvent(display, Expose, &report)) |
147 | ; |
148 | break; |
149 | |
150 | case FocusOut: |
151 | // XFocusChangeEvent |
152 | // printf("focus out\n"); |
153 | // xf.pXUnmapWindow(display, win); |
154 | break; |
155 | |
156 | case KeyPress: |
157 | // printf("press %d\n", report.xkey.keycode); |
158 | break; |
159 | |
160 | default: |
161 | break; |
162 | } |
163 | } |
164 | |
165 | fail2: |
166 | dlclose(x11lib); |
167 | fail: |
168 | fprintf(stderr, "x11 handling disabled.\n"); |
169 | return NULL; |
170 | } |
171 | |
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172 | static struct termios g_kbd_termios_saved; |
173 | static int g_kbdfd; |
174 | |
175 | static void hidecon_start(void) |
176 | { |
177 | struct termios kbd_termios; |
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178 | int mode; |
179 | |
180 | g_kbdfd = open("/dev/tty", O_RDWR); |
181 | if (g_kbdfd == -1) { |
182 | perror(PFX "open /dev/tty"); |
183 | return; |
184 | } |
185 | |
186 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
187 | perror(PFX "(not hiding FB): KDGETMODE"); |
188 | goto fail; |
189 | } |
190 | |
191 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
192 | perror(PFX "tcgetattr"); |
193 | goto fail; |
194 | } |
195 | |
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196 | g_kbd_termios_saved = kbd_termios; |
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197 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
198 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
199 | kbd_termios.c_cc[VMIN] = 0; |
200 | kbd_termios.c_cc[VTIME] = 0; |
201 | |
202 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
203 | perror(PFX "tcsetattr"); |
204 | goto fail; |
205 | } |
206 | |
207 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
208 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
209 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
210 | goto fail; |
211 | } |
212 | |
213 | return; |
214 | |
215 | fail: |
216 | close(g_kbdfd); |
217 | g_kbdfd = -1; |
218 | } |
219 | |
220 | static void hidecon_end(void) |
221 | { |
222 | if (g_kbdfd < 0) |
223 | return; |
224 | |
225 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
226 | perror(PFX "KDSETMODE KD_TEXT"); |
227 | |
228 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
229 | perror(PFX "tcsetattr"); |
230 | |
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231 | close(g_kbdfd); |
232 | g_kbdfd = -1; |
233 | } |
234 | |
235 | int oshide_init(void) |
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236 | { |
237 | pthread_t tid; |
238 | int ret; |
239 | |
240 | ret = pthread_create(&tid, NULL, x11h_handler, NULL); |
241 | if (ret != 0) { |
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242 | fprintf(stderr, PFX "failed to create thread: %d\n", ret); |
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243 | return ret; |
244 | } |
245 | pthread_detach(tid); |
246 | |
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247 | hidecon_start(); |
248 | |
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249 | return 0; |
250 | } |
251 | |
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252 | void oshide_finish(void) |
253 | { |
254 | /* XXX: the X thread.. */ |
255 | |
256 | hidecon_end(); |
257 | } |
258 | |
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259 | #if 0 |
260 | int main() |
261 | { |
262 | x11h_init(); |
263 | sleep(5); |
264 | } |
265 | #endif |