eb3668fc |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2011 |
3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <string.h> |
13 | #include <pthread.h> |
14 | |
15 | #include <dlfcn.h> |
16 | #include <X11/Xlib.h> |
17 | #include <X11/Xutil.h> |
18 | #include <X11/XKBlib.h> |
19 | |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> |
22 | #include <fcntl.h> |
23 | #include <unistd.h> |
24 | #include <sys/ioctl.h> |
25 | #include <termios.h> |
26 | #include <linux/kd.h> |
27 | |
28 | #define PFX "xenv: " |
29 | |
30 | #define FPTR(f) typeof(f) * p##f |
31 | #define FPTR_LINK(xf, dl, f) { \ |
32 | xf.p##f = dlsym(dl, #f); \ |
33 | if (xf.p##f == NULL) { \ |
34 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
35 | goto fail; \ |
36 | } \ |
37 | } |
38 | |
39 | struct xstuff { |
40 | Display *display; |
41 | FPTR(XCreateBitmapFromData); |
42 | FPTR(XCreatePixmapCursor); |
43 | FPTR(XFreePixmap); |
44 | FPTR(XOpenDisplay); |
45 | FPTR(XDisplayName); |
46 | FPTR(XCloseDisplay); |
47 | FPTR(XCreateSimpleWindow); |
48 | FPTR(XChangeWindowAttributes); |
49 | FPTR(XSelectInput); |
50 | FPTR(XMapWindow); |
51 | FPTR(XNextEvent); |
52 | FPTR(XCheckTypedEvent); |
53 | FPTR(XUnmapWindow); |
54 | FPTR(XGrabKeyboard); |
55 | FPTR(XPending); |
56 | FPTR(XLookupKeysym); |
57 | FPTR(XkbSetDetectableAutoRepeat); |
58 | }; |
59 | |
60 | static struct xstuff g_xstuff; |
61 | |
62 | static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win) |
63 | { |
64 | Cursor cursor; |
65 | Pixmap pix; |
66 | XColor dummy; |
67 | char d = 0; |
68 | |
69 | memset(&dummy, 0, sizeof(dummy)); |
70 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
71 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
72 | &dummy, &dummy, 0, 0); |
73 | xf->pXFreePixmap(display, pix); |
74 | return cursor; |
75 | } |
76 | |
77 | static int x11h_init(void) |
78 | { |
79 | unsigned int display_width, display_height; |
80 | Display *display; |
81 | XSetWindowAttributes attributes; |
82 | Window win; |
83 | Visual *visual; |
84 | void *x11lib; |
85 | int screen; |
86 | |
87 | memset(&g_xstuff, 0, sizeof(g_xstuff)); |
88 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
89 | if (x11lib == NULL) { |
90 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
91 | goto fail; |
92 | } |
93 | FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData); |
94 | FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor); |
95 | FPTR_LINK(g_xstuff, x11lib, XFreePixmap); |
96 | FPTR_LINK(g_xstuff, x11lib, XOpenDisplay); |
97 | FPTR_LINK(g_xstuff, x11lib, XDisplayName); |
98 | FPTR_LINK(g_xstuff, x11lib, XCloseDisplay); |
99 | FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow); |
100 | FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes); |
101 | FPTR_LINK(g_xstuff, x11lib, XSelectInput); |
102 | FPTR_LINK(g_xstuff, x11lib, XMapWindow); |
103 | FPTR_LINK(g_xstuff, x11lib, XNextEvent); |
104 | FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent); |
105 | FPTR_LINK(g_xstuff, x11lib, XUnmapWindow); |
106 | FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard); |
107 | FPTR_LINK(g_xstuff, x11lib, XPending); |
108 | FPTR_LINK(g_xstuff, x11lib, XLookupKeysym); |
109 | FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat); |
110 | |
111 | //XInitThreads(); |
112 | |
113 | g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL); |
114 | if (display == NULL) |
115 | { |
116 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
117 | g_xstuff.pXDisplayName(NULL)); |
118 | goto fail2; |
119 | } |
120 | |
121 | visual = DefaultVisual(display, 0); |
122 | if (visual->class != TrueColor) |
123 | fprintf(stderr, PFX "warning: non true color visual\n"); |
124 | |
125 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
126 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
127 | ProtocolRevision(display)); |
128 | |
129 | screen = DefaultScreen(display); |
130 | |
131 | display_width = DisplayWidth(display, screen); |
132 | display_height = DisplayHeight(display, screen); |
133 | printf(PFX "display is %dx%d\n", display_width, display_height); |
134 | |
135 | win = g_xstuff.pXCreateSimpleWindow(display, |
136 | RootWindow(display, screen), |
137 | 0, 0, display_width, display_height, 0, |
138 | BlackPixel(display, screen), |
139 | BlackPixel(display, screen)); |
140 | |
141 | attributes.override_redirect = True; |
142 | attributes.cursor = transparent_cursor(&g_xstuff, display, win); |
143 | g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
144 | |
145 | g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask); |
146 | g_xstuff.pXMapWindow(display, win); |
147 | g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
148 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
149 | // XSetIOErrorHandler |
150 | |
151 | return 0; |
152 | fail2: |
153 | dlclose(x11lib); |
154 | fail: |
155 | g_xstuff.display = NULL; |
156 | fprintf(stderr, "x11 handling disabled.\n"); |
157 | return -1; |
158 | } |
159 | |
160 | static int x11h_update(int *is_down) |
161 | { |
162 | XEvent evt; |
163 | |
164 | while (g_xstuff.pXPending(g_xstuff.display)) |
165 | { |
166 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
167 | switch (evt.type) |
168 | { |
169 | case Expose: |
170 | while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt)) |
171 | ; |
172 | break; |
173 | |
174 | case KeyPress: |
175 | *is_down = 1; |
176 | return g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
177 | |
178 | case KeyRelease: |
179 | *is_down = 0; |
180 | return g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
181 | // printf("press %d\n", evt.xkey.keycode); |
182 | } |
183 | } |
184 | |
185 | return NoSymbol; |
186 | } |
187 | |
188 | static struct termios g_kbd_termios_saved; |
189 | static int g_kbdfd; |
190 | |
191 | static int tty_init(void) |
192 | { |
193 | struct termios kbd_termios; |
194 | int mode; |
195 | |
196 | g_kbdfd = open("/dev/tty", O_RDWR); |
197 | if (g_kbdfd == -1) { |
198 | perror(PFX "open /dev/tty"); |
199 | return -1; |
200 | } |
201 | |
202 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
203 | perror(PFX "(not hiding FB): KDGETMODE"); |
204 | goto fail; |
205 | } |
206 | |
207 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
208 | perror(PFX "tcgetattr"); |
209 | goto fail; |
210 | } |
211 | |
212 | g_kbd_termios_saved = kbd_termios; |
213 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
214 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
215 | kbd_termios.c_cc[VMIN] = 0; |
216 | kbd_termios.c_cc[VTIME] = 0; |
217 | |
218 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
219 | perror(PFX "tcsetattr"); |
220 | goto fail; |
221 | } |
222 | |
223 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
224 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
225 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
226 | goto fail; |
227 | } |
228 | |
229 | return 0; |
230 | |
231 | fail: |
232 | close(g_kbdfd); |
233 | g_kbdfd = -1; |
234 | return -1; |
235 | } |
236 | |
237 | static void tty_end(void) |
238 | { |
239 | if (g_kbdfd <= 0) |
240 | return; |
241 | |
242 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
243 | perror(PFX "KDSETMODE KD_TEXT"); |
244 | |
245 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
246 | perror(PFX "tcsetattr"); |
247 | |
248 | close(g_kbdfd); |
249 | g_kbdfd = -1; |
250 | } |
251 | |
252 | int xenv_init(void) |
253 | { |
254 | int ret; |
255 | |
256 | ret = x11h_init(); |
257 | if (ret == 0) |
258 | return 0; |
259 | |
260 | ret = tty_init(); |
261 | if (ret == 0) |
262 | return 0; |
263 | |
264 | fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n"); |
265 | return -1; |
266 | } |
267 | |
268 | int xenv_update(int *is_down) |
269 | { |
270 | if (g_xstuff.display) |
271 | return x11h_update(is_down); |
272 | |
273 | // TODO: read tty? |
274 | return -1; |
275 | } |
276 | |
277 | void xenv_finish(void) |
278 | { |
279 | // TODO: cleanup X? |
280 | tty_end(); |
281 | } |