diff options
Diffstat (limited to 'frontend/linux/xenv.c')
| -rw-r--r-- | frontend/linux/xenv.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/frontend/linux/xenv.c b/frontend/linux/xenv.c new file mode 100644 index 0000000..3de7628 --- /dev/null +++ b/frontend/linux/xenv.c @@ -0,0 +1,281 @@ +/* + * (C) GraÅžvydas "notaz" Ignotas, 2009-2011 + * + * This work is licensed under the terms of any of these licenses + * (at your option): + * - GNU GPL, version 2 or later. + * - GNU LGPL, version 2.1 or later. + * See the COPYING file in the top-level directory. + */ + +#include <stdio.h> +#include <string.h> +#include <pthread.h> + +#include <dlfcn.h> +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/XKBlib.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <termios.h> +#include <linux/kd.h> + +#define PFX "xenv: " + +#define FPTR(f) typeof(f) * p##f +#define FPTR_LINK(xf, dl, f) { \ + xf.p##f = dlsym(dl, #f); \ + if (xf.p##f == NULL) { \ + fprintf(stderr, "missing symbol: %s\n", #f); \ + goto fail; \ + } \ +} + +struct xstuff { + Display *display; + FPTR(XCreateBitmapFromData); + FPTR(XCreatePixmapCursor); + FPTR(XFreePixmap); + FPTR(XOpenDisplay); + FPTR(XDisplayName); + FPTR(XCloseDisplay); + FPTR(XCreateSimpleWindow); + FPTR(XChangeWindowAttributes); + FPTR(XSelectInput); + FPTR(XMapWindow); + FPTR(XNextEvent); + FPTR(XCheckTypedEvent); + FPTR(XUnmapWindow); + FPTR(XGrabKeyboard); + FPTR(XPending); + FPTR(XLookupKeysym); + FPTR(XkbSetDetectableAutoRepeat); +}; + +static struct xstuff g_xstuff; + +static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win) +{ + Cursor cursor; + Pixmap pix; + XColor dummy; + char d = 0; + + memset(&dummy, 0, sizeof(dummy)); + pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); + cursor = xf->pXCreatePixmapCursor(display, pix, pix, + &dummy, &dummy, 0, 0); + xf->pXFreePixmap(display, pix); + return cursor; +} + +static int x11h_init(void) +{ + unsigned int display_width, display_height; + Display *display; + XSetWindowAttributes attributes; + Window win; + Visual *visual; + void *x11lib; + int screen; + + memset(&g_xstuff, 0, sizeof(g_xstuff)); + x11lib = dlopen("libX11.so.6", RTLD_LAZY); + if (x11lib == NULL) { + fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); + goto fail; + } + FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData); + FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor); + FPTR_LINK(g_xstuff, x11lib, XFreePixmap); + FPTR_LINK(g_xstuff, x11lib, XOpenDisplay); + FPTR_LINK(g_xstuff, x11lib, XDisplayName); + FPTR_LINK(g_xstuff, x11lib, XCloseDisplay); + FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow); + FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes); + FPTR_LINK(g_xstuff, x11lib, XSelectInput); + FPTR_LINK(g_xstuff, x11lib, XMapWindow); + FPTR_LINK(g_xstuff, x11lib, XNextEvent); + FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent); + FPTR_LINK(g_xstuff, x11lib, XUnmapWindow); + FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard); + FPTR_LINK(g_xstuff, x11lib, XPending); + FPTR_LINK(g_xstuff, x11lib, XLookupKeysym); + FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat); + + //XInitThreads(); + + g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL); + if (display == NULL) + { + fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", + g_xstuff.pXDisplayName(NULL)); + goto fail2; + } + + visual = DefaultVisual(display, 0); + if (visual->class != TrueColor) + fprintf(stderr, PFX "warning: non true color visual\n"); + + printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), + VendorRelease(display), DisplayString(display), ProtocolVersion(display), + ProtocolRevision(display)); + + screen = DefaultScreen(display); + + display_width = DisplayWidth(display, screen); + display_height = DisplayHeight(display, screen); + printf(PFX "display is %dx%d\n", display_width, display_height); + + win = g_xstuff.pXCreateSimpleWindow(display, + RootWindow(display, screen), + 0, 0, display_width, display_height, 0, + BlackPixel(display, screen), + BlackPixel(display, screen)); + + attributes.override_redirect = True; + attributes.cursor = transparent_cursor(&g_xstuff, display, win); + g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); + + g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask); + g_xstuff.pXMapWindow(display, win); + g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); + g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); + // XSetIOErrorHandler + + return 0; +fail2: + dlclose(x11lib); +fail: + g_xstuff.display = NULL; + fprintf(stderr, "x11 handling disabled.\n"); + return -1; +} + +static int x11h_update(int *is_down) +{ + XEvent evt; + + while (g_xstuff.pXPending(g_xstuff.display)) + { + g_xstuff.pXNextEvent(g_xstuff.display, &evt); + switch (evt.type) + { + case Expose: + while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt)) + ; + break; + + case KeyPress: + *is_down = 1; + return g_xstuff.pXLookupKeysym(&evt.xkey, 0); + + case KeyRelease: + *is_down = 0; + return g_xstuff.pXLookupKeysym(&evt.xkey, 0); + // printf("press %d\n", evt.xkey.keycode); + } + } + + return NoSymbol; +} + +static struct termios g_kbd_termios_saved; +static int g_kbdfd = -1; + +static int tty_init(void) +{ + struct termios kbd_termios; + int mode; + + g_kbdfd = open("/dev/tty", O_RDWR); + if (g_kbdfd == -1) { + perror(PFX "open /dev/tty"); + return -1; + } + + if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { + perror(PFX "(not hiding FB): KDGETMODE"); + goto fail; + } + + if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { + perror(PFX "tcgetattr"); + goto fail; + } + + g_kbd_termios_saved = kbd_termios; + kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); + kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); + kbd_termios.c_cc[VMIN] = 0; + kbd_termios.c_cc[VTIME] = 0; + + if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { + perror(PFX "tcsetattr"); + goto fail; + } + + if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { + perror(PFX "KDSETMODE KD_GRAPHICS"); + tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); + goto fail; + } + + return 0; + +fail: + close(g_kbdfd); + g_kbdfd = -1; + return -1; +} + +static void tty_end(void) +{ + if (g_kbdfd < 0) + return; + + if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) + perror(PFX "KDSETMODE KD_TEXT"); + + if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) + perror(PFX "tcsetattr"); + + close(g_kbdfd); + g_kbdfd = -1; +} + +int xenv_init(void) +{ + int ret; + + ret = x11h_init(); + if (ret == 0) + return 0; + + ret = tty_init(); + if (ret == 0) + return 0; + + fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n"); + return -1; +} + +int xenv_update(int *is_down) +{ + if (g_xstuff.display) + return x11h_update(is_down); + + // TODO: read tty? + return -1; +} + +void xenv_finish(void) +{ + // TODO: cleanup X? + tty_end(); +} |