diff options
Diffstat (limited to 'otherlibs/graph/open.c')
| -rw-r--r-- | otherlibs/graph/open.c | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/otherlibs/graph/open.c b/otherlibs/graph/open.c deleted file mode 100644 index 4354033b97..0000000000 --- a/otherlibs/graph/open.c +++ /dev/null @@ -1,339 +0,0 @@ -#include <fcntl.h> -#include <signal.h> -#include "libgraph.h" -#include <alloc.h> -#include <fail.h> -#include <memory.h> -#ifdef HAS_SETITIMER -#include <sys/time.h> -#endif - -static Bool gr_initialized = False; - -static int gr_error_handler(), gr_ioerror_handler(); -value gr_clear_graph(); - -value gr_open_graph(arg) - value arg; -{ - char display_name[64], geometry_spec[64]; - char * p, * q; - XSizeHints hints; - int ret; - XEvent event; - int x, y, w, h; - XWindowAttributes attributes; - - if (gr_initialized) { - gr_clear_graph(); - } else { - - /* Parse the argument */ - for (p = String_val(arg), q = display_name; *p != 0 && *p != ' '; p++) - if (q < display_name + sizeof(display_name) - 1) *q++ = *p; - *q = 0; - while (*p == ' ') p++; - for (q = geometry_spec; *p != 0; p++) - if (q < geometry_spec + sizeof(geometry_spec) - 1) *q++ = *p; - *q = 0; - - /* Open the display */ - grdisplay = XOpenDisplay(display_name); - if (grdisplay == NULL) - gr_fail("Cannot open display %s", XDisplayName(display_name)); - grscreen = DefaultScreen(grdisplay); - grblack = BlackPixel(grdisplay, grscreen); - grwhite = WhitePixel(grdisplay, grscreen); - grcolormap = DefaultColormap(grdisplay, grscreen); - - /* Set up the error handlers */ - XSetErrorHandler(gr_error_handler); - XSetIOErrorHandler(gr_ioerror_handler); - - /* Parse the geometry specification */ - hints.x = 0; - hints.y = 0; - hints.width = DEFAULT_SCREEN_WIDTH; - hints.height = DEFAULT_SCREEN_HEIGHT; - hints.flags = PPosition | PSize; - hints.win_gravity = 0; - - ret = XWMGeometry(grdisplay, grscreen, geometry_spec, "", BORDER_WIDTH, - &hints, &x, &y, &w, &h, &hints.win_gravity); - if (ret & (XValue | YValue)) { - hints.x = x; hints.y = y; hints.flags |= USPosition; - } - if (ret & (WidthValue | HeightValue)) { - hints.width = w; hints.height = h; hints.flags |= USSize; - } - - /* Initial drawing color is black */ - grcolor = grblack; - - /* Create the on-screen window */ - grwindow.w = hints.width; - grwindow.h = hints.height; - grwindow.win = - XCreateSimpleWindow(grdisplay, DefaultRootWindow(grdisplay), - hints.x, hints.y, hints.width, hints.height, - BORDER_WIDTH, grblack, grwhite); - XSetStandardProperties(grdisplay, grwindow.win, WINDOW_NAME, ICON_NAME, - None, NULL, 0, &hints); - grwindow.gc = XCreateGC(grdisplay, grwindow.win, 0, NULL); - XSetBackground(grdisplay, grwindow.gc, grwhite); - XSetForeground(grdisplay, grwindow.gc, grcolor); - - /* Require exposure, resize and keyboard events */ - XSelectInput(grdisplay, grwindow.win, DEFAULT_EVENT_MASK); - - /* Map the window on the screen and wait for the first Expose event */ - XMapWindow(grdisplay, grwindow.win); - do { XNextEvent(grdisplay, &event); } while (event.type != Expose); - - /* Get the actual window dimensions */ - - XGetWindowAttributes(grdisplay, grwindow.win, &attributes); - grwindow.w = attributes.width; - grwindow.h = attributes.height; - - /* Create the pixmap used for backing store */ - grbstore.w = grwindow.w; - grbstore.h = grwindow.h; - grbstore.win = - XCreatePixmap(grdisplay, grwindow.win, grbstore.w, grbstore.h, - XDefaultDepth(grdisplay, grscreen)); - grbstore.gc = XCreateGC(grdisplay, grbstore.win, 0, NULL); - XSetBackground(grdisplay, grbstore.gc, grwhite); - - /* Clear the pixmap */ - XSetForeground(grdisplay, grbstore.gc, grwhite); - XFillRectangle(grdisplay, grbstore.win, grbstore.gc, - 0, 0, grbstore.w, grbstore.h); - XSetForeground(grdisplay, grbstore.gc, grcolor); - - /* The global data structures are now correctly initialized. - In particular, gr_sigio_handler can now handle events safely. */ - gr_initialized = True; - - /* If possible, request that system calls be restarted after - the EVENT_SIGNAL signal. */ -#ifdef SA_RESTART - { struct sigaction action; - sigaction(EVENT_SIGNAL, NULL, &action); - action.sa_flags |= SA_RESTART; - sigaction(EVENT_SIGNAL, &action, NULL); - } -#endif - -#ifdef USE_ASYNC_IO - /* If BSD-style asynchronous I/O are supported: - arrange for I/O on the connection to trigger the SIGIO signal */ - ret = fcntl(ConnectionNumber(grdisplay), F_GETFL, 0); - fcntl(ConnectionNumber(grdisplay), F_SETFL, ret | FASYNC); - fcntl(ConnectionNumber(grdisplay), F_SETOWN, getpid()); -#endif -#ifdef USE_INTERVAL_TIMER - /* If BSD-style interval timers are provided, use the real-time timer - to poll events. */ - { struct itimerval it; - it.it_interval.tv_sec = 0; - it.it_interval.tv_usec = 250000; - it.it_value.tv_sec = 0; - it.it_value.tv_usec = 250000; - setitimer(ITIMER_REAL, &it, NULL); - } -#endif -#ifdef USE_ALARM - /* The poor man's solution: use alarm to poll events. */ - alarm(1); -#endif - } - /* Position the current point at origin */ - grx = 0; - gry = 0; - /* Reset the color cache */ - gr_init_color_cache(); - return Val_unit; -} - -value gr_close_graph() -{ - if (gr_initialized) { -#ifdef USE_INTERVAL_TIMER - struct itimerval it; - it.it_value.tv_sec = 0; - it.it_value.tv_usec = 0; - setitimer(ITIMER_REAL, &it, NULL); -#endif - gr_initialized = False; - if (grfont != NULL) { XFreeFont(grdisplay, grfont); grfont = NULL; } - XFreeGC(grdisplay, grwindow.gc); - XDestroyWindow(grdisplay, grwindow.win); - XFreeGC(grdisplay, grbstore.gc); - XFreePixmap(grdisplay, grbstore.win); - XCloseDisplay(grdisplay); - } - return Val_unit; -} - -value gr_clear_graph() -{ - gr_check_open(); - XSetForeground(grdisplay, grwindow.gc, grwhite); - XFillRectangle(grdisplay, grwindow.win, grwindow.gc, - 0, 0, grwindow.w, grwindow.h); - XSetForeground(grdisplay, grwindow.gc, grcolor); - XSetForeground(grdisplay, grbstore.gc, grwhite); - XFillRectangle(grdisplay, grbstore.win, grbstore.gc, - 0, 0, grbstore.w, grbstore.h); - XSetForeground(grdisplay, grbstore.gc, grcolor); - XFlush(grdisplay); - return Val_unit; -} - -value gr_size_x() -{ - gr_check_open(); - return Val_int(grwindow.w); -} - -value gr_size_y() -{ - gr_check_open(); - return Val_int(grwindow.h); -} - -/* The gr_sigio_handler is called via the signal machinery in the bytecode - interpreter. The signal system ensures that this function will be - called either between two bytecode instructions, or during a blocking - primitive. In either case, not in the middle of an Xlib call. - (There is no blocking primitives in this library, not even - wait_next_event, for various reasons.) */ - -void gr_handle_simple_event(); - -value gr_sigio_signal(unit) - value unit; -{ - return Val_int(EVENT_SIGNAL); -} - -value gr_sigio_handler() -{ - XEvent grevent; - - if (gr_initialized) { - while (XCheckMaskEvent(grdisplay, -1 /*all events*/, &grevent)) - gr_handle_simple_event(&grevent); - } -#ifdef USE_ALARM - alarm(1); -#endif - return Val_unit; -} - -void gr_handle_simple_event(e) - XEvent * e; -{ - switch (e->type) { - - case Expose: - XCopyArea(grdisplay, grbstore.win, grwindow.win, grwindow.gc, - e->xexpose.x, e->xexpose.y + grbstore.h - grwindow.h, - e->xexpose.width, e->xexpose.height, - e->xexpose.x, e->xexpose.y); - XFlush(grdisplay); - break; - - case ConfigureNotify: - grwindow.w = e->xconfigure.width; - grwindow.h = e->xconfigure.height; - if (grwindow.w > grbstore.w || grwindow.h > grbstore.h) { - - /* Allocate a new backing store large enough to accomodate - both the old backing store and the current window. */ - struct canvas newbstore; - newbstore.w = max(grwindow.w, grbstore.w); - newbstore.h = max(grwindow.h, grbstore.h); - newbstore.win = - XCreatePixmap(grdisplay, grwindow.win, newbstore.w, newbstore.h, - XDefaultDepth(grdisplay, grscreen)); - newbstore.gc = XCreateGC(grdisplay, newbstore.win, 0, NULL); - XSetBackground(grdisplay, newbstore.gc, grwhite); - XSetForeground(grdisplay, newbstore.gc, grwhite); - XFillRectangle(grdisplay, newbstore.win, newbstore.gc, - 0, 0, newbstore.w, newbstore.h); - XSetForeground(grdisplay, newbstore.gc, grcolor); - - /* Copy the old backing store into the new one */ - XCopyArea(grdisplay, grbstore.win, newbstore.win, newbstore.gc, - 0, 0, grbstore.w, grbstore.h, 0, newbstore.h - grbstore.h); - - /* Free the old backing store */ - XFreeGC(grdisplay, grbstore.gc); - XFreePixmap(grdisplay, grbstore.win); - - /* Use the new backing store */ - grbstore = newbstore; - XFlush(grdisplay); - } - break; - - case MappingNotify: - XRefreshKeyboardMapping(&(e->xmapping)); - break; - - case KeyPress: - { KeySym thekey; - char keytxt[256]; - int nchars; - char * p; - nchars = XLookupString(&(e->xkey), keytxt, sizeof(keytxt), &thekey, 0); - for (p = keytxt; nchars > 0; p++, nchars--) gr_enqueue_char(*p); - break; - } - } -} - -/* Processing of graphic errors */ - -static value graphic_failure_exn; - -value gr_register_graphic_failure(exn) - value exn; -{ - graphic_failure_exn = Field(exn, 0); - register_global_root(&graphic_failure_exn); - return Val_unit; -} - -void gr_fail(fmt, arg) - char * fmt, * arg; -{ - char buffer[1024]; - sprintf(buffer, fmt, arg); - raise_with_string(graphic_failure_exn, buffer); -} - -void gr_check_open() -{ - if (!gr_initialized) gr_fail("graphic screen not opened", NULL); -} - -static int gr_error_handler(display, error) - Display * display; - XErrorEvent * error; -{ - char errmsg[512]; - XGetErrorText(error->display, error->error_code, errmsg, sizeof(errmsg)); - gr_fail("Xlib error: %s", errmsg); - return 0; -} - -static int gr_ioerror_handler(display) - Display * display; -{ - gr_fail("fatal I/O error", NULL); - return 0; -} - |