try harder with screen res detection
[sdl_omap.git] / src / video / omapdss / linux / xenv.c
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 = -1;
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 }