| 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 |