src/rt/x11.c

#ifndef lint
static const char       RCSid[] = "$Id: x11.c,v 2.30 2003/02/25 02:47:23 greg Exp $";
#endif
/*
 *  x11.c - driver for X-windows version 11
 */

#include "copyright.h"

#include  "standard.h"
#include  <sys/ioctl.h>
#ifdef sparc
#include  <sys/conf.h>
#include  <sys/file.h>
#include  <sys/filio.h>
#endif
#if  !defined(FNDELAY) && defined(O_NONBLOCK)
#define  FNDELAY  O_NONBLOCK
#endif

#include  <X11/Xlib.h>
#include  <X11/cursorfont.h>
#include  <X11/Xutil.h>

#include  "color.h"
#include  "driver.h"
#include  "x11twind.h"
#include  "x11icon.h"

#define GAMMA           2.2             /* default exponent correction */

#define MINWIDTH        (32*COMCW)      /* minimum graphics window width */
#define MINHEIGHT       (MINWIDTH/2)    /* minimum graphics window height */

#define BORWIDTH        5               /* border width */
#define COMHEIGHT       (COMLH*COMCH)   /* command line height (pixels) */

#define COMFN           "8x13"          /* command line font name */
#define COMLH           3               /* number of command lines */
#define COMCW           8               /* approx. character width (pixels) */
#define COMCH           14              /* approx. character height (pixels) */

#define  ourscreen      DefaultScreen(ourdisplay)
#define  ourroot        RootWindow(ourdisplay,ourscreen)

#define  levptr(etype)  ((etype *)&currentevent)

static XEvent  currentevent;            /* current event */

static int  ncolors = 0;                /* color table size */
static int  mapped = 0;                 /* window is mapped? */
static unsigned long  *pixval = NULL;   /* allocated pixels */
static unsigned long  ourblack=0, ourwhite=1;

static Display  *ourdisplay = NULL;     /* our display */

static XVisualInfo  ourvinfo;           /* our visual information */

static Window  gwind = 0;               /* our graphics window */

static Cursor  pickcursor = 0;          /* cursor used for picking */

static int  gwidth, gheight;            /* graphics window size */

static int  comheight;                  /* desired comline height */
static TEXTWIND  *comline = NULL;       /* our command line */

static char  c_queue[64];               /* input queue */
static int  c_first = 0;                /* first character in queue */
static int  c_last = 0;                 /* last character in queue */

static GC  ourgc = 0;                   /* our graphics context for drawing */

static Colormap ourmap = 0;             /* our color map */

#define IC_X11          0
#define IC_IOCTL        1
#define IC_READ         2

static int  inpcheck;                   /* whence to check input */

static int      x11_getcur();

static void  x11_close(), x11_clear(), x11_paintr(), x11_errout(),
                x11_comout(), x11_comin(), x11_flush();

static void  std_comin(), std_comout();

static struct driver  x11_driver = {
        x11_close, x11_clear, x11_paintr, x11_getcur,
        NULL, NULL, x11_flush, 1.0
};

static int  getpixels(), x11_getc();
static void  xnewcolr(), freepixels(), resizewindow(),
                getevent(), getkey(), fixwindow();
static unsigned long  true_pixel();


struct driver *
x11_init(name, id)              /* initialize driver */
char  *name, *id;
{
        char  *gv;
        int  nplanes;
        XSetWindowAttributes    ourwinattr;
        XWMHints  ourxwmhints;
        XSizeHints      oursizhints;
                                        /* open display server */
        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL) {
                eputs("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
                                        /* find a usable visual */
        nplanes = DisplayPlanes(ourdisplay, ourscreen);
        if (XMatchVisualInfo(ourdisplay,ourscreen,
                                nplanes>12?nplanes:24,TrueColor,&ourvinfo) ||
                        XMatchVisualInfo(ourdisplay,ourscreen,
                                nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
                ourblack = 0;
                ourwhite = ourvinfo.red_mask |
                                ourvinfo.green_mask |
                                ourvinfo.blue_mask ;
        } else {
                if (nplanes < 4) {
                        eputs("not enough colors\n");
                        return(NULL);
                }
                if (!XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,PseudoColor,&ourvinfo) &&
                                !XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,GrayScale,&ourvinfo)) {
                        eputs("unsupported visual type\n");
                        return(NULL);
                }
                ourblack = BlackPixel(ourdisplay,ourscreen);
                ourwhite = WhitePixel(ourdisplay,ourscreen);
        }
                                        /* set gamma */
        if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
                        || (gv = getenv("DISPLAY_GAMMA")) != NULL)
                make_gmap(atof(gv));
        else
                make_gmap(GAMMA);
                                        /* X11 command line or no? */
        if (!strcmp(name, "x11"))
                comheight = COMHEIGHT;
        else /* "x11d" */ {
                comheight = 0;
#ifndef  FNDELAY
                eputs("warning: x11d driver not fully functional on this machine\n");
#endif
        }
                                        /* open window */
        ourwinattr.background_pixel = ourblack;
        ourwinattr.border_pixel = ourblack;
                                        /* this is stupid */
        ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
                                ourvinfo.visual, AllocNone);
        gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
                DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
                DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
                BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
                CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr);
        if (gwind == 0) {
                eputs("cannot create window\n");
                return(NULL);
        }
        XStoreName(ourdisplay, gwind, id);
        /* create a cursor */
        pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
        ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
        ourxwmhints.flags = InputHint|IconPixmapHint;
        ourxwmhints.input = True;
        ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
                        gwind, x11icon_bits, x11icon_width, x11icon_height);
        XSetWMHints(ourdisplay, gwind, &ourxwmhints);
        oursizhints.min_width = MINWIDTH;
        oursizhints.min_height = MINHEIGHT+comheight;
        oursizhints.flags = PMinSize;
        XSetNormalHints(ourdisplay, gwind, &oursizhints);
        XSelectInput(ourdisplay, gwind, ExposureMask);
        XMapWindow(ourdisplay, gwind);
        XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
        gwidth = levptr(XExposeEvent)->width;
        gheight = levptr(XExposeEvent)->height - comheight;
        x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
        x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
        x11_driver.inpready = 0;
        mapped = 1;
                                        /* set i/o vectors */
        if (comheight) {
                x11_driver.comin = x11_comin;
                x11_driver.comout = x11_comout;
                erract[COMMAND].pf = x11_comout;
                if (erract[WARNING].pf != NULL)
                        erract[WARNING].pf = x11_errout;
                inpcheck = IC_X11;
        } else {
                x11_driver.comin = std_comin;
                x11_driver.comout = std_comout;
                erract[COMMAND].pf = std_comout;
                inpcheck = IC_IOCTL;
        }
        return(&x11_driver);
}


static void
x11_close()                     /* close our display */
{
        erract[COMMAND].pf = NULL;              /* reset error vectors */
        if (erract[WARNING].pf != NULL)
                erract[WARNING].pf = wputs;
        if (ourdisplay == NULL)
                return;
        if (comline != NULL) {
                xt_close(comline);
                comline = NULL;
        }
        freepixels();
        XFreeGC(ourdisplay, ourgc);
        XDestroyWindow(ourdisplay, gwind);
        gwind = 0;
        ourgc = 0;
        XFreeCursor(ourdisplay, pickcursor);
        XCloseDisplay(ourdisplay);
        ourdisplay = NULL;
}


static void
x11_clear(xres, yres)                   /* clear our display */
int  xres, yres;
{
                                                /* check limits */
        if (xres < MINWIDTH)
                xres = MINWIDTH;
        if (yres < MINHEIGHT)
                yres = MINHEIGHT;
                                                /* resize window */
        if (xres != gwidth || yres != gheight) {
                XSelectInput(ourdisplay, gwind, 0);
                XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
                gwidth = xres;
                gheight = yres;
                XFlush(ourdisplay);
                sleep(2);                       /* wait for window manager */
                XSync(ourdisplay, 1);           /* discard input */
        }
        XClearWindow(ourdisplay, gwind);
                                                /* reinitialize color table */
        if (ourvinfo.class == PseudoColor || ourvinfo.class == GrayScale) {
                if (getpixels() == 0)
                        eputs("cannot allocate colors\n");
                else
                        new_ctab(ncolors);
        }
                                                /* get new command line */
        if (comline != NULL)
                xt_close(comline);
        if (comheight) {
                comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
                                comheight, 0, ourblack, ourwhite, COMFN);
                if (comline == NULL) {
                        eputs("cannot open command line window\n");
                        quit(1);
                }
                XSelectInput(ourdisplay, comline->w, ExposureMask);
                                                /* remove earmuffs */
                XSelectInput(ourdisplay, gwind,
                StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
        } else                                  /* remove earmuffs */
                XSelectInput(ourdisplay, gwind,
                        StructureNotifyMask|ExposureMask|ButtonPressMask);
}


static void
x11_paintr(col, xmin, ymin, xmax, ymax)         /* fill a rectangle */
COLOR  col;
int  xmin, ymin, xmax, ymax;
{
        unsigned long  pixel;

        if (!mapped)
                return;
        if (ncolors > 0)
                pixel = pixval[get_pixel(col, xnewcolr)];
        else
                pixel = true_pixel(col);
        XSetForeground(ourdisplay, ourgc, pixel);
        XFillRectangle(ourdisplay, gwind, 
                ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
}


static void
x11_flush()                     /* flush output */
{
        char    buf[256];
        int     n;
                                                /* check for input */
        XNoOp(ourdisplay);
        n = XPending(ourdisplay);                       /* from X server */
        while (n-- > 0)
                getevent();
#ifdef FNDELAY
        if (inpcheck == IC_IOCTL) {                     /* from stdin */
#ifdef FIONREAD
                if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
#else
                if (1) {
#endif
                        if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
                                eputs("cannot change input mode\n");
                                quit(1);
                        }
                        inpcheck = IC_READ;
                } else
                        x11_driver.inpready += n;
        }
        if (inpcheck == IC_READ) {
                n = read(fileno(stdin), buf, sizeof(buf)-1);
                if (n > 0) {
                        buf[n] = '\0';
                        tocombuf(buf, &x11_driver);
                }
        }
#endif
}


static void
x11_comin(inp, prompt)          /* read in a command line */
char  *inp, *prompt;
{
        if (prompt != NULL) {
                x11_flush();            /* make sure we get everything */
                if (fromcombuf(inp, &x11_driver))
                        return;
                xt_puts(prompt, comline);
        }
        xt_cursor(comline, TBLKCURS);
        editline(inp, x11_getc, x11_comout);
        xt_cursor(comline, TNOCURS);
}


static void
x11_comout(outp)                /* output a string to command line */
char  *outp;
{
        if (comline == NULL || outp == NULL || !outp[0])
                return;
        xt_puts(outp, comline);
        if (outp[strlen(outp)-1] == '\n')
                XFlush(ourdisplay);
}


static void
x11_errout(msg)                 /* output an error message */
char  *msg;
{
        eputs(msg);             /* send to stderr also! */
        x11_comout(msg);
}


static void
std_comin(inp, prompt)          /* read in command line from stdin */
char  *inp, *prompt;
{
        if (prompt != NULL) {
                if (fromcombuf(inp, &x11_driver))
                        return;
                if (!x11_driver.inpready)
                        std_comout(prompt);
        }
#ifdef FNDELAY
        if (inpcheck == IC_READ) {      /* turn off FNDELAY */
                if (fcntl(fileno(stdin), F_SETFL, 0) < 0) {
                        eputs("cannot change input mode\n");
                        quit(1);
                }
                inpcheck = IC_IOCTL;
        }
#endif
        if (gets(inp) == NULL) {
                strcpy(inp, "quit");
                return;
        }
        x11_driver.inpready -= strlen(inp) + 1;
        if (x11_driver.inpready < 0)
                x11_driver.inpready = 0;
}


static void
std_comout(outp)                /* write out string to stdout */
char    *outp;
{
        fputs(outp, stdout);
        fflush(stdout);
}


static int
x11_getcur(xp, yp)              /* get cursor position */
int  *xp, *yp;
{
        while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
                        GrabModeAsync, GrabModeAsync, None, pickcursor,
                        CurrentTime) != GrabSuccess)
                sleep(2);

        do
                getevent();
        while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
        *xp = levptr(XButtonPressedEvent)->x;
        *yp = gheight-1 - levptr(XButtonPressedEvent)->y;
        XUngrabPointer(ourdisplay, CurrentTime);
        XFlush(ourdisplay);                             /* insure release */
        if (c_last > c_first)                   /* key pressed */
                return(x11_getc());
                                                /* button pressed */
        if (levptr(XButtonPressedEvent)->button == Button1)
                return(MB1);
        if (levptr(XButtonPressedEvent)->button == Button2)
                return(MB2);
        if (levptr(XButtonPressedEvent)->button == Button3)
                return(MB3);
        return(ABORT);
}


static void
xnewcolr(ndx, r, g, b)          /* enter a color into hardware table */
int  ndx;
int  r, g, b;
{
        XColor  xcolor;

        xcolor.pixel = pixval[ndx];
        xcolor.red = r << 8;
        xcolor.green = g << 8;
        xcolor.blue = b << 8;
        xcolor.flags = DoRed|DoGreen|DoBlue;

        XStoreColor(ourdisplay, ourmap, &xcolor);
}


static int
getpixels()                             /* get the color map */
{
        XColor  thiscolor;
        register int  i, j;

        if (ncolors > 0)
                return(ncolors);
        if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
                ourmap = DefaultColormap(ourdisplay,ourscreen);
                goto loop;
        }
newmap:
        ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
loop:
        for (ncolors = ourvinfo.colormap_size;
                        ncolors > ourvinfo.colormap_size/3;
                        ncolors = ncolors*.937) {
                pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
                if (pixval == NULL)
                        return(ncolors = 0);
                if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
                        break;
                free((void *)pixval);
                pixval = NULL;
        }
        if (pixval == NULL) {
                if (ourmap == DefaultColormap(ourdisplay,ourscreen))
                        goto newmap;            /* try it with our map */
                else
                        return(ncolors = 0);    /* failed */
        }
        if (ourmap != DefaultColormap(ourdisplay,ourscreen))
                for (i = 0; i < ncolors; i++) { /* reset black and white */
                        if (pixval[i] != ourblack && pixval[i] != ourwhite)
                                continue;
                        thiscolor.pixel = pixval[i];
                        thiscolor.flags = DoRed|DoGreen|DoBlue;
                        XQueryColor(ourdisplay,
                                        DefaultColormap(ourdisplay,ourscreen),
                                        &thiscolor);
                        XStoreColor(ourdisplay, ourmap, &thiscolor);
                        for (j = i; j+1 < ncolors; j++)
                                pixval[j] = pixval[j+1];
                        ncolors--;
                        i--;
                }
        XSetWindowColormap(ourdisplay, gwind, ourmap);
        return(ncolors);
}


static void
freepixels()                            /* free our pixels */
{
        if (ncolors == 0)
                return;
        XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
        free((void *)pixval);
        pixval = NULL;
        ncolors = 0;
        if (ourmap != DefaultColormap(ourdisplay,ourscreen))
                XFreeColormap(ourdisplay, ourmap);
        ourmap = 0;
}


static unsigned long
true_pixel(col)                 /* return true pixel value for color */
COLOR  col;
{
        unsigned long  rval;
        BYTE  rgb[3];

        map_color(rgb, col);
        rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
        rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
        rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
        return(rval);
}


static int
x11_getc()                      /* get a command character */
{
        while (c_last <= c_first) {
                c_first = c_last = 0;           /* reset */
                getevent();                     /* wait for key */
        }
        x11_driver.inpready--;
        return(c_queue[c_first++]);
}


static void
getevent()                      /* get next event */
{
        XNextEvent(ourdisplay, levptr(XEvent));
        switch (levptr(XEvent)->type) {
        case ConfigureNotify:
                resizewindow(levptr(XConfigureEvent));
                break;
        case UnmapNotify:
                mapped = 0;
                freepixels();
                break;
        case MapNotify:
                if (ourvinfo.class == PseudoColor ||
                                ourvinfo.class == GrayScale) {
                        if (getpixels() == 0)
                                eputs("cannot allocate colors\n");
                        else
                                new_ctab(ncolors);
                }
                mapped = 1;
                break;
        case Expose:
                fixwindow(levptr(XExposeEvent));
                break;
        case KeyPress:
                getkey(levptr(XKeyPressedEvent));
                break;
        case ButtonPress:
                break;
        }
}


static void
getkey(ekey)                            /* get input key */
register XKeyPressedEvent  *ekey;
{
        register int  n;

        n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
                                NULL, NULL);
        c_last += n;
        x11_driver.inpready += n;
}


static void
fixwindow(eexp)                         /* repair damage to window */
register XExposeEvent  *eexp;
{
        char  buf[80];

        if (eexp->window == gwind) {
                sprintf(buf, "repaint %d %d %d %d\n",
                        eexp->x, gheight - eexp->y - eexp->height,
                        eexp->x + eexp->width, gheight - eexp->y);
                tocombuf(buf, &x11_driver);
        } else if (eexp->window == comline->w) {
                if (eexp->count == 0)
                        xt_redraw(comline);
        }
}


static void
resizewindow(ersz)                      /* resize window */
register XConfigureEvent  *ersz;
{
        if (ersz->width == gwidth && ersz->height-comheight == gheight)
                return;

        gwidth = ersz->width;
        gheight = ersz->height-comheight;
        x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
        x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;

        tocombuf("new\n", &x11_driver);
}
Revision:	2.31
Committed:	Mon Jul 21 22:30:19 2003 UTC (20 years, 9 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.30:	+5 -3 lines
Log Message:	Eliminated copystruct() macro, which is unnecessary in ANSI. Reduced ambiguity warnings for nested if/if/else clauses.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.31	static const char RCSid[] = "$Id: x11.c,v 2.30 2003/02/25 02:47:23 greg Exp $";
3	greg	1.1	#endif
4			/*
5	greg	2.4	* x11.c - driver for X-windows version 11
6	greg	2.29	*/
7
8	greg	2.30	#include "copyright.h"
9	greg	1.1
10	gregl	2.27	#include "standard.h"
11	greg	1.1	#include <sys/ioctl.h>
12	greg	2.23	#ifdef sparc
13			#include <sys/conf.h>
14			#include <sys/file.h>
15			#include <sys/filio.h>
16			#endif
17	greg	2.25	#if !defined(FNDELAY) && defined(O_NONBLOCK)
18			#define FNDELAY O_NONBLOCK
19			#endif
20	greg	1.1
21			#include <X11/Xlib.h>
22	greg	1.4	#include <X11/cursorfont.h>
23			#include <X11/Xutil.h>
24	greg	1.1
25			#include "color.h"
26			#include "driver.h"
27			#include "x11twind.h"
28	greg	1.18	#include "x11icon.h"
29	greg	1.1
30	greg	2.6	#define GAMMA 2.2 /* default exponent correction */
31	greg	1.1
32	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
33	greg	2.9	#define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
34	greg	1.4
35	greg	1.1	#define BORWIDTH 5 /* border width */
36			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
37
38			#define COMFN "8x13" /* command line font name */
39			#define COMLH 3 /* number of command lines */
40			#define COMCW 8 /* approx. character width (pixels) */
41			#define COMCH 14 /* approx. character height (pixels) */
42
43	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
44			#define ourroot RootWindow(ourdisplay,ourscreen)
45
46			#define levptr(etype) ((etype *)&currentevent)
47	greg	1.1
48	greg	1.4	static XEvent currentevent; /* current event */
49	greg	1.1
50			static int ncolors = 0; /* color table size */
51	greg	2.8	static int mapped = 0; /* window is mapped? */
52	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
53	greg	2.3	static unsigned long ourblack=0, ourwhite=1;
54	greg	1.1
55			static Display ourdisplay = NULL; / our display */
56
57	greg	2.2	static XVisualInfo ourvinfo; /* our visual information */
58	greg	1.6
59	greg	1.1	static Window gwind = 0; /* our graphics window */
60
61			static Cursor pickcursor = 0; /* cursor used for picking */
62
63	greg	1.4	static int gwidth, gheight; /* graphics window size */
64	greg	1.1
65	greg	2.17	static int comheight; /* desired comline height */
66	greg	1.1	static TEXTWIND comline = NULL; / our command line */
67
68			static char c_queue[64]; /* input queue */
69			static int c_first = 0; /* first character in queue */
70			static int c_last = 0; /* last character in queue */
71
72			static GC ourgc = 0; /* our graphics context for drawing */
73
74	greg	1.6	static Colormap ourmap = 0; /* our color map */
75	greg	1.1
76	greg	2.19	#define IC_X11 0
77			#define IC_IOCTL 1
78			#define IC_READ 2
79
80			static int inpcheck; /* whence to check input */
81
82	greg	2.29	static int x11_getcur();
83	greg	1.1
84	greg	2.29	static void x11_close(), x11_clear(), x11_paintr(), x11_errout(),
85			x11_comout(), x11_comin(), x11_flush();
86	greg	1.1
87	greg	2.29	static void std_comin(), std_comout();
88	greg	2.17
89	greg	1.1	static struct driver x11_driver = {
90			x11_close, x11_clear, x11_paintr, x11_getcur,
91	greg	2.17	NULL, NULL, x11_flush, 1.0
92	greg	1.1	};
93
94	greg	2.29	static int getpixels(), x11_getc();
95			static void xnewcolr(), freepixels(), resizewindow(),
96			getevent(), getkey(), fixwindow();
97	greg	2.11	static unsigned long true_pixel();
98	greg	1.1
99	greg	2.11
100	greg	1.1	struct driver *
101			x11_init(name, id) /* initialize driver */
102			char name, id;
103			{
104	greg	2.6	char *gv;
105	greg	1.6	int nplanes;
106	greg	1.10	XSetWindowAttributes ourwinattr;
107	greg	1.4	XWMHints ourxwmhints;
108	greg	1.12	XSizeHints oursizhints;
109	greg	2.17	/* open display server */
110	greg	1.1	ourdisplay = XOpenDisplay(NULL);
111			if (ourdisplay == NULL) {
112	gregl	2.27	eputs("cannot open X-windows; DISPLAY variable set?\n");
113	greg	1.1	return(NULL);
114			}
115	greg	2.2	/* find a usable visual */
116	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
117	greg	2.4	if (XMatchVisualInfo(ourdisplay,ourscreen,
118	greg	2.26	nplanes>12?nplanes:24,TrueColor,&ourvinfo) \|\|
119	greg	2.4	XMatchVisualInfo(ourdisplay,ourscreen,
120	greg	2.26	nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
121	greg	2.4	ourblack = 0;
122			ourwhite = ourvinfo.red_mask \|
123			ourvinfo.green_mask \|
124			ourvinfo.blue_mask ;
125			} else {
126	greg	2.2	if (nplanes < 4) {
127	gregl	2.27	eputs("not enough colors\n");
128	greg	1.6	return(NULL);
129	greg	2.4	}
130			if (!XMatchVisualInfo(ourdisplay,ourscreen,
131	greg	2.2	nplanes,PseudoColor,&ourvinfo) &&
132			!XMatchVisualInfo(ourdisplay,ourscreen,
133			nplanes,GrayScale,&ourvinfo)) {
134	gregl	2.27	eputs("unsupported visual type\n");
135	greg	2.2	return(NULL);
136	greg	1.6	}
137	greg	2.3	ourblack = BlackPixel(ourdisplay,ourscreen);
138			ourwhite = WhitePixel(ourdisplay,ourscreen);
139			}
140	greg	2.6	/* set gamma */
141	greg	2.14	if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
142	greg	2.18	\|\| (gv = getenv("DISPLAY_GAMMA")) != NULL)
143	greg	2.6	make_gmap(atof(gv));
144			else
145			make_gmap(GAMMA);
146	greg	2.17	/* X11 command line or no? */
147			if (!strcmp(name, "x11"))
148			comheight = COMHEIGHT;
149	greg	2.25	else /* "x11d" */ {
150	greg	2.17	comheight = 0;
151	greg	2.25	#ifndef FNDELAY
152	gregl	2.27	eputs("warning: x11d driver not fully functional on this machine\n");
153	greg	2.25	#endif
154			}
155	greg	2.6	/* open window */
156	greg	1.12	ourwinattr.background_pixel = ourblack;
157	greg	1.10	ourwinattr.border_pixel = ourblack;
158	greg	2.4	/* this is stupid */
159	greg	2.2	ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
160			ourvinfo.visual, AllocNone);
161	greg	1.10	gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
162	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
163			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
164	greg	2.2	BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
165			CWBackPixel\|CWBorderPixel\|CWColormap, &ourwinattr);
166	greg	1.4	if (gwind == 0) {
167	gregl	2.27	eputs("cannot create window\n");
168	greg	1.4	return(NULL);
169			}
170	greg	2.4	XStoreName(ourdisplay, gwind, id);
171	greg	1.10	/* create a cursor */
172			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
173	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
174	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
175	greg	1.4	ourxwmhints.input = True;
176	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
177			gwind, x11icon_bits, x11icon_width, x11icon_height);
178	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
179	greg	1.12	oursizhints.min_width = MINWIDTH;
180	greg	2.17	oursizhints.min_height = MINHEIGHT+comheight;
181	greg	1.12	oursizhints.flags = PMinSize;
182			XSetNormalHints(ourdisplay, gwind, &oursizhints);
183	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
184			XMapWindow(ourdisplay, gwind);
185	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
186	greg	1.4	gwidth = levptr(XExposeEvent)->width;
187	greg	2.17	gheight = levptr(XExposeEvent)->height - comheight;
188	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
189			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
190	greg	1.1	x11_driver.inpready = 0;
191	greg	2.8	mapped = 1;
192	greg	2.17	/* set i/o vectors */
193			if (comheight) {
194			x11_driver.comin = x11_comin;
195			x11_driver.comout = x11_comout;
196	gregl	2.27	erract[COMMAND].pf = x11_comout;
197			if (erract[WARNING].pf != NULL)
198			erract[WARNING].pf = x11_errout;
199	greg	2.19	inpcheck = IC_X11;
200	greg	2.17	} else {
201			x11_driver.comin = std_comin;
202			x11_driver.comout = std_comout;
203	gregl	2.27	erract[COMMAND].pf = std_comout;
204	greg	2.19	inpcheck = IC_IOCTL;
205	greg	2.17	}
206	greg	1.1	return(&x11_driver);
207			}
208
209
210	greg	2.29	static void
211	greg	1.1	x11_close() /* close our display */
212			{
213	gregl	2.27	erract[COMMAND].pf = NULL; /* reset error vectors */
214			if (erract[WARNING].pf != NULL)
215			erract[WARNING].pf = wputs;
216	greg	1.1	if (ourdisplay == NULL)
217			return;
218			if (comline != NULL) {
219			xt_close(comline);
220			comline = NULL;
221			}
222	greg	1.8	freepixels();
223			XFreeGC(ourdisplay, ourgc);
224			XDestroyWindow(ourdisplay, gwind);
225			gwind = 0;
226			ourgc = 0;
227	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
228			XCloseDisplay(ourdisplay);
229			ourdisplay = NULL;
230			}
231
232
233	greg	2.29	static void
234	greg	1.1	x11_clear(xres, yres) /* clear our display */
235			int xres, yres;
236			{
237	greg	1.12	/* check limits */
238			if (xres < MINWIDTH)
239			xres = MINWIDTH;
240			if (yres < MINHEIGHT)
241			yres = MINHEIGHT;
242			/* resize window */
243			if (xres != gwidth \|\| yres != gheight) {
244	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
245	greg	2.17	XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
246	greg	1.1	gwidth = xres;
247			gheight = yres;
248	greg	1.8	XFlush(ourdisplay);
249			sleep(2); /* wait for window manager */
250	greg	1.4	XSync(ourdisplay, 1); /* discard input */
251			}
252	greg	1.13	XClearWindow(ourdisplay, gwind);
253			/* reinitialize color table */
254	schorsch	2.31	if (ourvinfo.class == PseudoColor \|\| ourvinfo.class == GrayScale) {
255	greg	1.13	if (getpixels() == 0)
256	gregl	2.27	eputs("cannot allocate colors\n");
257	greg	1.13	else
258			new_ctab(ncolors);
259	schorsch	2.31	}
260	greg	1.12	/* get new command line */
261	greg	1.13	if (comline != NULL)
262			xt_close(comline);
263	greg	2.17	if (comheight) {
264			comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
265			comheight, 0, ourblack, ourwhite, COMFN);
266			if (comline == NULL) {
267	gregl	2.27	eputs("cannot open command line window\n");
268	greg	2.17	quit(1);
269			}
270			XSelectInput(ourdisplay, comline->w, ExposureMask);
271	greg	1.12	/* remove earmuffs */
272	greg	2.17	XSelectInput(ourdisplay, gwind,
273	greg	1.4	StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
274	greg	2.17	} else /* remove earmuffs */
275			XSelectInput(ourdisplay, gwind,
276			StructureNotifyMask\|ExposureMask\|ButtonPressMask);
277	greg	1.1	}
278
279
280	greg	2.29	static void
281	greg	1.1	x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
282			COLOR col;
283			int xmin, ymin, xmax, ymax;
284			{
285	greg	1.6	unsigned long pixel;
286	greg	1.1
287	greg	2.8	if (!mapped)
288			return;
289	greg	1.6	if (ncolors > 0)
290			pixel = pixval[get_pixel(col, xnewcolr)];
291	greg	2.8	else
292	greg	1.6	pixel = true_pixel(col);
293			XSetForeground(ourdisplay, ourgc, pixel);
294			XFillRectangle(ourdisplay, gwind,
295			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
296	greg	1.5	}
297
298
299	greg	2.29	static void
300	greg	1.5	x11_flush() /* flush output */
301			{
302	greg	2.19	char buf[256];
303	greg	2.15	int n;
304	greg	2.16	/* check for input */
305	greg	1.10	XNoOp(ourdisplay);
306	greg	2.16	n = XPending(ourdisplay); /* from X server */
307			while (n-- > 0)
308	greg	1.5	getevent();
309	greg	2.22	#ifdef FNDELAY
310	greg	2.19	if (inpcheck == IC_IOCTL) { /* from stdin */
311	greg	2.22	#ifdef FIONREAD
312	greg	2.17	if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
313	greg	2.22	#else
314			if (1) {
315			#endif
316	greg	2.19	if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
317	gregl	2.27	eputs("cannot change input mode\n");
318	greg	2.19	quit(1);
319			}
320			inpcheck = IC_READ;
321			} else
322			x11_driver.inpready += n;
323			}
324			if (inpcheck == IC_READ) {
325			n = read(fileno(stdin), buf, sizeof(buf)-1);
326			if (n > 0) {
327			buf[n] = '\0';
328	greg	2.21	tocombuf(buf, &x11_driver);
329	greg	2.17	}
330	greg	2.15	}
331	greg	2.22	#endif
332	greg	1.1	}
333
334
335	greg	2.29	static void
336	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
337			char inp, prompt;
338	greg	1.1	{
339	greg	2.15	if (prompt != NULL) {
340			x11_flush(); /* make sure we get everything */
341	greg	1.4	if (fromcombuf(inp, &x11_driver))
342			return;
343	greg	2.15	xt_puts(prompt, comline);
344			}
345	greg	1.1	xt_cursor(comline, TBLKCURS);
346			editline(inp, x11_getc, x11_comout);
347			xt_cursor(comline, TNOCURS);
348			}
349
350
351	greg	2.29	static void
352	greg	2.17	x11_comout(outp) /* output a string to command line */
353			char *outp;
354	greg	1.1	{
355	gregl	2.28	if (comline == NULL \|\| outp == NULL \|\| !outp[0])
356	greg	1.11	return;
357	greg	2.17	xt_puts(outp, comline);
358			if (outp[strlen(outp)-1] == '\n')
359	greg	1.11	XFlush(ourdisplay);
360	greg	1.1	}
361
362
363	greg	2.29	static void
364	greg	1.1	x11_errout(msg) /* output an error message */
365			char *msg;
366			{
367	gregl	2.27	eputs(msg); /* send to stderr also! */
368	greg	1.1	x11_comout(msg);
369			}
370
371
372	greg	2.29	static void
373	greg	2.17	std_comin(inp, prompt) /* read in command line from stdin */
374			char inp, prompt;
375			{
376			if (prompt != NULL) {
377			if (fromcombuf(inp, &x11_driver))
378			return;
379			if (!x11_driver.inpready)
380	greg	2.25	std_comout(prompt);
381	greg	2.17	}
382	greg	2.24	#ifdef FNDELAY
383			if (inpcheck == IC_READ) { /* turn off FNDELAY */
384			if (fcntl(fileno(stdin), F_SETFL, 0) < 0) {
385	gregl	2.27	eputs("cannot change input mode\n");
386	greg	2.24	quit(1);
387			}
388			inpcheck = IC_IOCTL;
389			}
390			#endif
391	greg	2.17	if (gets(inp) == NULL) {
392			strcpy(inp, "quit");
393			return;
394			}
395			x11_driver.inpready -= strlen(inp) + 1;
396			if (x11_driver.inpready < 0)
397			x11_driver.inpready = 0;
398			}
399
400
401	greg	2.29	static void
402	greg	2.17	std_comout(outp) /* write out string to stdout */
403			char *outp;
404			{
405			fputs(outp, stdout);
406	greg	2.20	fflush(stdout);
407	greg	2.17	}
408
409
410	greg	1.1	static int
411			x11_getcur(xp, yp) /* get cursor position */
412			int xp, yp;
413			{
414			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
415			GrabModeAsync, GrabModeAsync, None, pickcursor,
416			CurrentTime) != GrabSuccess)
417			sleep(2);
418
419			do
420			getevent();
421			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
422			*xp = levptr(XButtonPressedEvent)->x;
423			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
424			XUngrabPointer(ourdisplay, CurrentTime);
425			XFlush(ourdisplay); /* insure release */
426			if (c_last > c_first) /* key pressed */
427			return(x11_getc());
428			/* button pressed */
429	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button1)
430	greg	1.1	return(MB1);
431	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button2)
432	greg	1.1	return(MB2);
433	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button3)
434	greg	1.1	return(MB3);
435			return(ABORT);
436			}
437
438
439	greg	2.29	static void
440	greg	1.1	xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
441			int ndx;
442			int r, g, b;
443			{
444			XColor xcolor;
445
446			xcolor.pixel = pixval[ndx];
447			xcolor.red = r << 8;
448			xcolor.green = g << 8;
449			xcolor.blue = b << 8;
450			xcolor.flags = DoRed\|DoGreen\|DoBlue;
451
452			XStoreColor(ourdisplay, ourmap, &xcolor);
453			}
454
455
456			static int
457			getpixels() /* get the color map */
458			{
459	greg	1.16	XColor thiscolor;
460			register int i, j;
461
462	greg	1.4	if (ncolors > 0)
463	greg	2.2	return(ncolors);
464			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
465	greg	1.6	ourmap = DefaultColormap(ourdisplay,ourscreen);
466			goto loop;
467			}
468			newmap:
469	greg	2.2	ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
470	greg	1.6	loop:
471	greg	2.2	for (ncolors = ourvinfo.colormap_size;
472			ncolors > ourvinfo.colormap_size/3;
473	greg	1.6	ncolors = ncolors*.937) {
474	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
475	greg	1.1	if (pixval == NULL)
476	greg	1.6	return(ncolors = 0);
477	greg	2.8	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
478	greg	1.6	break;
479	greg	2.29	free((void *)pixval);
480	greg	1.6	pixval = NULL;
481	greg	1.1	}
482	greg	1.6	if (pixval == NULL) {
483			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
484			goto newmap; /* try it with our map */
485			else
486			return(ncolors = 0); /* failed */
487			}
488	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
489			for (i = 0; i < ncolors; i++) { /* reset black and white */
490	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
491			continue;
492			thiscolor.pixel = pixval[i];
493			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
494			XQueryColor(ourdisplay,
495			DefaultColormap(ourdisplay,ourscreen),
496			&thiscolor);
497			XStoreColor(ourdisplay, ourmap, &thiscolor);
498			for (j = i; j+1 < ncolors; j++)
499			pixval[j] = pixval[j+1];
500			ncolors--;
501			i--;
502			}
503	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
504	greg	1.6	return(ncolors);
505	greg	1.1	}
506
507
508	greg	2.29	static void
509	greg	1.1	freepixels() /* free our pixels */
510			{
511			if (ncolors == 0)
512			return;
513			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
514	greg	2.29	free((void *)pixval);
515	greg	2.7	pixval = NULL;
516	greg	1.1	ncolors = 0;
517	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
518	greg	1.6	XFreeColormap(ourdisplay, ourmap);
519			ourmap = 0;
520	greg	1.1	}
521
522
523	greg	1.6	static unsigned long
524			true_pixel(col) /* return true pixel value for color */
525			COLOR col;
526			{
527			unsigned long rval;
528			BYTE rgb[3];
529
530			map_color(rgb, col);
531	greg	2.2	rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
532			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
533			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
534	greg	1.6	return(rval);
535			}
536
537
538	greg	1.1	static int
539			x11_getc() /* get a command character */
540			{
541			while (c_last <= c_first) {
542			c_first = c_last = 0; /* reset */
543			getevent(); /* wait for key */
544			}
545			x11_driver.inpready--;
546			return(c_queue[c_first++]);
547			}
548
549
550	greg	2.29	static void
551	greg	1.1	getevent() /* get next event */
552			{
553			XNextEvent(ourdisplay, levptr(XEvent));
554			switch (levptr(XEvent)->type) {
555	greg	1.4	case ConfigureNotify:
556			resizewindow(levptr(XConfigureEvent));
557			break;
558			case UnmapNotify:
559	greg	2.8	mapped = 0;
560	greg	1.4	freepixels();
561			break;
562			case MapNotify:
563	greg	2.2	if (ourvinfo.class == PseudoColor \|\|
564	schorsch	2.31	ourvinfo.class == GrayScale) {
565	greg	1.6	if (getpixels() == 0)
566	gregl	2.27	eputs("cannot allocate colors\n");
567	greg	1.6	else
568			new_ctab(ncolors);
569	schorsch	2.31	}
570	greg	2.8	mapped = 1;
571	greg	1.4	break;
572			case Expose:
573			fixwindow(levptr(XExposeEvent));
574			break;
575	greg	1.1	case KeyPress:
576			getkey(levptr(XKeyPressedEvent));
577			break;
578			case ButtonPress:
579			break;
580			}
581			}
582
583
584	greg	2.29	static void
585	greg	1.1	getkey(ekey) /* get input key */
586			register XKeyPressedEvent *ekey;
587			{
588	greg	1.8	register int n;
589	greg	1.7
590			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
591	greg	1.1	NULL, NULL);
592	greg	1.7	c_last += n;
593			x11_driver.inpready += n;
594	greg	1.1	}
595
596
597	greg	2.29	static void
598	greg	1.1	fixwindow(eexp) /* repair damage to window */
599			register XExposeEvent *eexp;
600			{
601	greg	2.21	char buf[80];
602
603	greg	1.4	if (eexp->window == gwind) {
604	greg	2.21	sprintf(buf, "repaint %d %d %d %d\n",
605	greg	1.4	eexp->x, gheight - eexp->y - eexp->height,
606	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
607	greg	2.21	tocombuf(buf, &x11_driver);
608	greg	1.4	} else if (eexp->window == comline->w) {
609			if (eexp->count == 0)
610			xt_redraw(comline);
611			}
612	greg	1.1	}
613	greg	1.4
614
615	greg	2.29	static void
616	greg	1.4	resizewindow(ersz) /* resize window */
617			register XConfigureEvent *ersz;
618			{
619	greg	2.17	if (ersz->width == gwidth && ersz->height-comheight == gheight)
620	greg	1.4	return;
621
622			gwidth = ersz->width;
623	greg	2.17	gheight = ersz->height-comheight;
624	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
625			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
626
627	greg	2.21	tocombuf("new\n", &x11_driver);
628	greg	1.4	}