src/rt/x11.c

/* Copyright (c) 1995 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  x11.c - driver for X-windows version 11
 *
 *     Jan 1990
 */

#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 */

extern char  *malloc();

static int  x11_close(), x11_clear(), x11_paintr(), x11_errout(),
                x11_getcur(), x11_comout(), x11_comin(), x11_flush();

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


struct driver *
x11_init(name, id)              /* initialize driver */
char  *name, *id;
{
        extern char  *getenv();
        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
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
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
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
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
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
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
x11_errout(msg)                 /* output an error message */
char  *msg;
{
        eputs(msg);             /* send to stderr also! */
        x11_comout(msg);
}


static
std_comin(inp, prompt)          /* read in command line from stdin */
char  *inp, *prompt;
{
        extern char     *gets();

        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
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
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((char *)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
freepixels()                            /* free our pixels */
{
        if (ncolors == 0)
                return;
        XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
        free((char *)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
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
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
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
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:	2.28
Committed:	Tue Dec 2 15:57:45 1997 UTC (26 years, 11 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 2.27:	+1 -1 lines
Log Message:	fixed bug in passing empty string to x11_comout()
#	User	Rev	Content
1	greg	2.25	/* Copyright (c) 1995 Regents of the University of California */
2	greg	2.4
3	greg	1.1	#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8	greg	2.4	* x11.c - driver for X-windows version 11
9	greg	1.1	*
10	greg	1.4	* Jan 1990
11	greg	1.1	*/
12
13	gregl	2.27	#include "standard.h"
14	greg	1.1	#include <sys/ioctl.h>
15	greg	2.23	#ifdef sparc
16			#include <sys/conf.h>
17			#include <sys/file.h>
18			#include <sys/filio.h>
19			#endif
20	greg	2.25	#if !defined(FNDELAY) && defined(O_NONBLOCK)
21			#define FNDELAY O_NONBLOCK
22			#endif
23	greg	1.1
24			#include <X11/Xlib.h>
25	greg	1.4	#include <X11/cursorfont.h>
26			#include <X11/Xutil.h>
27	greg	1.1
28			#include "color.h"
29			#include "driver.h"
30			#include "x11twind.h"
31	greg	1.18	#include "x11icon.h"
32	greg	1.1
33	greg	2.6	#define GAMMA 2.2 /* default exponent correction */
34	greg	1.1
35	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
36	greg	2.9	#define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
37	greg	1.4
38	greg	1.1	#define BORWIDTH 5 /* border width */
39			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
40
41			#define COMFN "8x13" /* command line font name */
42			#define COMLH 3 /* number of command lines */
43			#define COMCW 8 /* approx. character width (pixels) */
44			#define COMCH 14 /* approx. character height (pixels) */
45
46	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
47			#define ourroot RootWindow(ourdisplay,ourscreen)
48
49			#define levptr(etype) ((etype *)&currentevent)
50	greg	1.1
51	greg	1.4	static XEvent currentevent; /* current event */
52	greg	1.1
53			static int ncolors = 0; /* color table size */
54	greg	2.8	static int mapped = 0; /* window is mapped? */
55	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
56	greg	2.3	static unsigned long ourblack=0, ourwhite=1;
57	greg	1.1
58			static Display ourdisplay = NULL; / our display */
59
60	greg	2.2	static XVisualInfo ourvinfo; /* our visual information */
61	greg	1.6
62	greg	1.1	static Window gwind = 0; /* our graphics window */
63
64			static Cursor pickcursor = 0; /* cursor used for picking */
65
66	greg	1.4	static int gwidth, gheight; /* graphics window size */
67	greg	1.1
68	greg	2.17	static int comheight; /* desired comline height */
69	greg	1.1	static TEXTWIND comline = NULL; / our command line */
70
71			static char c_queue[64]; /* input queue */
72			static int c_first = 0; /* first character in queue */
73			static int c_last = 0; /* last character in queue */
74
75			static GC ourgc = 0; /* our graphics context for drawing */
76
77	greg	1.6	static Colormap ourmap = 0; /* our color map */
78	greg	1.1
79	greg	2.19	#define IC_X11 0
80			#define IC_IOCTL 1
81			#define IC_READ 2
82
83			static int inpcheck; /* whence to check input */
84
85	greg	2.21	extern char *malloc();
86	greg	1.1
87	greg	1.14	static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
88	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
89	greg	1.1
90	greg	2.17	static int std_comin(), std_comout();
91
92	greg	1.1	static struct driver x11_driver = {
93			x11_close, x11_clear, x11_paintr, x11_getcur,
94	greg	2.17	NULL, NULL, x11_flush, 1.0
95	greg	1.1	};
96
97	greg	2.13	static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
98			getevent(), getkey(), fixwindow(), x11_getc();
99	greg	2.11	static unsigned long true_pixel();
100	greg	1.1
101	greg	2.11
102	greg	1.1	struct driver *
103			x11_init(name, id) /* initialize driver */
104			char name, id;
105			{
106	greg	2.6	extern char *getenv();
107			char *gv;
108	greg	1.6	int nplanes;
109	greg	1.10	XSetWindowAttributes ourwinattr;
110	greg	1.4	XWMHints ourxwmhints;
111	greg	1.12	XSizeHints oursizhints;
112	greg	2.17	/* open display server */
113	greg	1.1	ourdisplay = XOpenDisplay(NULL);
114			if (ourdisplay == NULL) {
115	gregl	2.27	eputs("cannot open X-windows; DISPLAY variable set?\n");
116	greg	1.1	return(NULL);
117			}
118	greg	2.2	/* find a usable visual */
119	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
120	greg	2.4	if (XMatchVisualInfo(ourdisplay,ourscreen,
121	greg	2.26	nplanes>12?nplanes:24,TrueColor,&ourvinfo) \|\|
122	greg	2.4	XMatchVisualInfo(ourdisplay,ourscreen,
123	greg	2.26	nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
124	greg	2.4	ourblack = 0;
125			ourwhite = ourvinfo.red_mask \|
126			ourvinfo.green_mask \|
127			ourvinfo.blue_mask ;
128			} else {
129	greg	2.2	if (nplanes < 4) {
130	gregl	2.27	eputs("not enough colors\n");
131	greg	1.6	return(NULL);
132	greg	2.4	}
133			if (!XMatchVisualInfo(ourdisplay,ourscreen,
134	greg	2.2	nplanes,PseudoColor,&ourvinfo) &&
135			!XMatchVisualInfo(ourdisplay,ourscreen,
136			nplanes,GrayScale,&ourvinfo)) {
137	gregl	2.27	eputs("unsupported visual type\n");
138	greg	2.2	return(NULL);
139	greg	1.6	}
140	greg	2.3	ourblack = BlackPixel(ourdisplay,ourscreen);
141			ourwhite = WhitePixel(ourdisplay,ourscreen);
142			}
143	greg	2.6	/* set gamma */
144	greg	2.14	if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
145	greg	2.18	\|\| (gv = getenv("DISPLAY_GAMMA")) != NULL)
146	greg	2.6	make_gmap(atof(gv));
147			else
148			make_gmap(GAMMA);
149	greg	2.17	/* X11 command line or no? */
150			if (!strcmp(name, "x11"))
151			comheight = COMHEIGHT;
152	greg	2.25	else /* "x11d" */ {
153	greg	2.17	comheight = 0;
154	greg	2.25	#ifndef FNDELAY
155	gregl	2.27	eputs("warning: x11d driver not fully functional on this machine\n");
156	greg	2.25	#endif
157			}
158	greg	2.6	/* open window */
159	greg	1.12	ourwinattr.background_pixel = ourblack;
160	greg	1.10	ourwinattr.border_pixel = ourblack;
161	greg	2.4	/* this is stupid */
162	greg	2.2	ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
163			ourvinfo.visual, AllocNone);
164	greg	1.10	gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
165	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
166			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
167	greg	2.2	BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
168			CWBackPixel\|CWBorderPixel\|CWColormap, &ourwinattr);
169	greg	1.4	if (gwind == 0) {
170	gregl	2.27	eputs("cannot create window\n");
171	greg	1.4	return(NULL);
172			}
173	greg	2.4	XStoreName(ourdisplay, gwind, id);
174	greg	1.10	/* create a cursor */
175			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
176	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
177	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
178	greg	1.4	ourxwmhints.input = True;
179	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
180			gwind, x11icon_bits, x11icon_width, x11icon_height);
181	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
182	greg	1.12	oursizhints.min_width = MINWIDTH;
183	greg	2.17	oursizhints.min_height = MINHEIGHT+comheight;
184	greg	1.12	oursizhints.flags = PMinSize;
185			XSetNormalHints(ourdisplay, gwind, &oursizhints);
186	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
187			XMapWindow(ourdisplay, gwind);
188	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
189	greg	1.4	gwidth = levptr(XExposeEvent)->width;
190	greg	2.17	gheight = levptr(XExposeEvent)->height - comheight;
191	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
192			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
193	greg	1.1	x11_driver.inpready = 0;
194	greg	2.8	mapped = 1;
195	greg	2.17	/* set i/o vectors */
196			if (comheight) {
197			x11_driver.comin = x11_comin;
198			x11_driver.comout = x11_comout;
199	gregl	2.27	erract[COMMAND].pf = x11_comout;
200			if (erract[WARNING].pf != NULL)
201			erract[WARNING].pf = x11_errout;
202	greg	2.19	inpcheck = IC_X11;
203	greg	2.17	} else {
204			x11_driver.comin = std_comin;
205			x11_driver.comout = std_comout;
206	gregl	2.27	erract[COMMAND].pf = std_comout;
207	greg	2.19	inpcheck = IC_IOCTL;
208	greg	2.17	}
209	greg	1.1	return(&x11_driver);
210			}
211
212
213			static
214			x11_close() /* close our display */
215			{
216	gregl	2.27	erract[COMMAND].pf = NULL; /* reset error vectors */
217			if (erract[WARNING].pf != NULL)
218			erract[WARNING].pf = wputs;
219	greg	1.1	if (ourdisplay == NULL)
220			return;
221			if (comline != NULL) {
222			xt_close(comline);
223			comline = NULL;
224			}
225	greg	1.8	freepixels();
226			XFreeGC(ourdisplay, ourgc);
227			XDestroyWindow(ourdisplay, gwind);
228			gwind = 0;
229			ourgc = 0;
230	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
231			XCloseDisplay(ourdisplay);
232			ourdisplay = NULL;
233			}
234
235
236			static
237			x11_clear(xres, yres) /* clear our display */
238			int xres, yres;
239			{
240	greg	1.12	/* check limits */
241			if (xres < MINWIDTH)
242			xres = MINWIDTH;
243			if (yres < MINHEIGHT)
244			yres = MINHEIGHT;
245			/* resize window */
246			if (xres != gwidth \|\| yres != gheight) {
247	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
248	greg	2.17	XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
249	greg	1.1	gwidth = xres;
250			gheight = yres;
251	greg	1.8	XFlush(ourdisplay);
252			sleep(2); /* wait for window manager */
253	greg	1.4	XSync(ourdisplay, 1); /* discard input */
254			}
255	greg	1.13	XClearWindow(ourdisplay, gwind);
256			/* reinitialize color table */
257	greg	2.2	if (ourvinfo.class == PseudoColor \|\| ourvinfo.class == GrayScale)
258	greg	1.13	if (getpixels() == 0)
259	gregl	2.27	eputs("cannot allocate colors\n");
260	greg	1.13	else
261			new_ctab(ncolors);
262	greg	1.12	/* get new command line */
263	greg	1.13	if (comline != NULL)
264			xt_close(comline);
265	greg	2.17	if (comheight) {
266			comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
267			comheight, 0, ourblack, ourwhite, COMFN);
268			if (comline == NULL) {
269	gregl	2.27	eputs("cannot open command line window\n");
270	greg	2.17	quit(1);
271			}
272			XSelectInput(ourdisplay, comline->w, ExposureMask);
273	greg	1.12	/* remove earmuffs */
274	greg	2.17	XSelectInput(ourdisplay, gwind,
275	greg	1.4	StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
276	greg	2.17	} else /* remove earmuffs */
277			XSelectInput(ourdisplay, gwind,
278			StructureNotifyMask\|ExposureMask\|ButtonPressMask);
279	greg	1.1	}
280
281
282			static
283			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
284			COLOR col;
285			int xmin, ymin, xmax, ymax;
286			{
287	greg	1.6	unsigned long pixel;
288	greg	1.1
289	greg	2.8	if (!mapped)
290			return;
291	greg	1.6	if (ncolors > 0)
292			pixel = pixval[get_pixel(col, xnewcolr)];
293	greg	2.8	else
294	greg	1.6	pixel = true_pixel(col);
295			XSetForeground(ourdisplay, ourgc, pixel);
296			XFillRectangle(ourdisplay, gwind,
297			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
298	greg	1.5	}
299
300
301			static
302			x11_flush() /* flush output */
303			{
304	greg	2.19	char buf[256];
305	greg	2.15	int n;
306	greg	2.16	/* check for input */
307	greg	1.10	XNoOp(ourdisplay);
308	greg	2.16	n = XPending(ourdisplay); /* from X server */
309			while (n-- > 0)
310	greg	1.5	getevent();
311	greg	2.22	#ifdef FNDELAY
312	greg	2.19	if (inpcheck == IC_IOCTL) { /* from stdin */
313	greg	2.22	#ifdef FIONREAD
314	greg	2.17	if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
315	greg	2.22	#else
316			if (1) {
317			#endif
318	greg	2.19	if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
319	gregl	2.27	eputs("cannot change input mode\n");
320	greg	2.19	quit(1);
321			}
322			inpcheck = IC_READ;
323			} else
324			x11_driver.inpready += n;
325			}
326			if (inpcheck == IC_READ) {
327			n = read(fileno(stdin), buf, sizeof(buf)-1);
328			if (n > 0) {
329			buf[n] = '\0';
330	greg	2.21	tocombuf(buf, &x11_driver);
331	greg	2.17	}
332	greg	2.15	}
333	greg	2.22	#endif
334	greg	1.1	}
335
336
337			static
338	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
339			char inp, prompt;
340	greg	1.1	{
341	greg	2.15	if (prompt != NULL) {
342			x11_flush(); /* make sure we get everything */
343	greg	1.4	if (fromcombuf(inp, &x11_driver))
344			return;
345	greg	2.15	xt_puts(prompt, comline);
346			}
347	greg	1.1	xt_cursor(comline, TBLKCURS);
348			editline(inp, x11_getc, x11_comout);
349			xt_cursor(comline, TNOCURS);
350			}
351
352
353			static
354	greg	2.17	x11_comout(outp) /* output a string to command line */
355			char *outp;
356	greg	1.1	{
357	gregl	2.28	if (comline == NULL \|\| outp == NULL \|\| !outp[0])
358	greg	1.11	return;
359	greg	2.17	xt_puts(outp, comline);
360			if (outp[strlen(outp)-1] == '\n')
361	greg	1.11	XFlush(ourdisplay);
362	greg	1.1	}
363
364
365			static
366			x11_errout(msg) /* output an error message */
367			char *msg;
368			{
369	gregl	2.27	eputs(msg); /* send to stderr also! */
370	greg	1.1	x11_comout(msg);
371			}
372
373
374	greg	2.17	static
375			std_comin(inp, prompt) /* read in command line from stdin */
376			char inp, prompt;
377			{
378			extern char *gets();
379
380			if (prompt != NULL) {
381			if (fromcombuf(inp, &x11_driver))
382			return;
383			if (!x11_driver.inpready)
384	greg	2.25	std_comout(prompt);
385	greg	2.17	}
386	greg	2.24	#ifdef FNDELAY
387			if (inpcheck == IC_READ) { /* turn off FNDELAY */
388			if (fcntl(fileno(stdin), F_SETFL, 0) < 0) {
389	gregl	2.27	eputs("cannot change input mode\n");
390	greg	2.24	quit(1);
391			}
392			inpcheck = IC_IOCTL;
393			}
394			#endif
395	greg	2.17	if (gets(inp) == NULL) {
396			strcpy(inp, "quit");
397			return;
398			}
399			x11_driver.inpready -= strlen(inp) + 1;
400			if (x11_driver.inpready < 0)
401			x11_driver.inpready = 0;
402			}
403
404
405			static
406			std_comout(outp) /* write out string to stdout */
407			char *outp;
408			{
409			fputs(outp, stdout);
410	greg	2.20	fflush(stdout);
411	greg	2.17	}
412
413
414	greg	1.1	static int
415			x11_getcur(xp, yp) /* get cursor position */
416			int xp, yp;
417			{
418			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
419			GrabModeAsync, GrabModeAsync, None, pickcursor,
420			CurrentTime) != GrabSuccess)
421			sleep(2);
422
423			do
424			getevent();
425			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
426			*xp = levptr(XButtonPressedEvent)->x;
427			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
428			XUngrabPointer(ourdisplay, CurrentTime);
429			XFlush(ourdisplay); /* insure release */
430			if (c_last > c_first) /* key pressed */
431			return(x11_getc());
432			/* button pressed */
433	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button1)
434	greg	1.1	return(MB1);
435	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button2)
436	greg	1.1	return(MB2);
437	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button3)
438	greg	1.1	return(MB3);
439			return(ABORT);
440			}
441
442
443			static
444			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
445			int ndx;
446			int r, g, b;
447			{
448			XColor xcolor;
449
450			xcolor.pixel = pixval[ndx];
451			xcolor.red = r << 8;
452			xcolor.green = g << 8;
453			xcolor.blue = b << 8;
454			xcolor.flags = DoRed\|DoGreen\|DoBlue;
455
456			XStoreColor(ourdisplay, ourmap, &xcolor);
457			}
458
459
460			static int
461			getpixels() /* get the color map */
462			{
463	greg	1.16	XColor thiscolor;
464			register int i, j;
465
466	greg	1.4	if (ncolors > 0)
467	greg	2.2	return(ncolors);
468			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
469	greg	1.6	ourmap = DefaultColormap(ourdisplay,ourscreen);
470			goto loop;
471			}
472			newmap:
473	greg	2.2	ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
474	greg	1.6	loop:
475	greg	2.2	for (ncolors = ourvinfo.colormap_size;
476			ncolors > ourvinfo.colormap_size/3;
477	greg	1.6	ncolors = ncolors*.937) {
478	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
479	greg	1.1	if (pixval == NULL)
480	greg	1.6	return(ncolors = 0);
481	greg	2.8	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
482	greg	1.6	break;
483	greg	1.1	free((char *)pixval);
484	greg	1.6	pixval = NULL;
485	greg	1.1	}
486	greg	1.6	if (pixval == NULL) {
487			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
488			goto newmap; /* try it with our map */
489			else
490			return(ncolors = 0); /* failed */
491			}
492	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
493			for (i = 0; i < ncolors; i++) { /* reset black and white */
494	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
495			continue;
496			thiscolor.pixel = pixval[i];
497			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
498			XQueryColor(ourdisplay,
499			DefaultColormap(ourdisplay,ourscreen),
500			&thiscolor);
501			XStoreColor(ourdisplay, ourmap, &thiscolor);
502			for (j = i; j+1 < ncolors; j++)
503			pixval[j] = pixval[j+1];
504			ncolors--;
505			i--;
506			}
507	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
508	greg	1.6	return(ncolors);
509	greg	1.1	}
510
511
512			static
513			freepixels() /* free our pixels */
514			{
515			if (ncolors == 0)
516			return;
517			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
518	greg	2.7	free((char *)pixval);
519			pixval = NULL;
520	greg	1.1	ncolors = 0;
521	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
522	greg	1.6	XFreeColormap(ourdisplay, ourmap);
523			ourmap = 0;
524	greg	1.1	}
525
526
527	greg	1.6	static unsigned long
528			true_pixel(col) /* return true pixel value for color */
529			COLOR col;
530			{
531			unsigned long rval;
532			BYTE rgb[3];
533
534			map_color(rgb, col);
535	greg	2.2	rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
536			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
537			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
538	greg	1.6	return(rval);
539			}
540
541
542	greg	1.1	static int
543			x11_getc() /* get a command character */
544			{
545			while (c_last <= c_first) {
546			c_first = c_last = 0; /* reset */
547			getevent(); /* wait for key */
548			}
549			x11_driver.inpready--;
550			return(c_queue[c_first++]);
551			}
552
553
554			static
555			getevent() /* get next event */
556			{
557			XNextEvent(ourdisplay, levptr(XEvent));
558			switch (levptr(XEvent)->type) {
559	greg	1.4	case ConfigureNotify:
560			resizewindow(levptr(XConfigureEvent));
561			break;
562			case UnmapNotify:
563	greg	2.8	mapped = 0;
564	greg	1.4	freepixels();
565			break;
566			case MapNotify:
567	greg	2.2	if (ourvinfo.class == PseudoColor \|\|
568			ourvinfo.class == GrayScale)
569	greg	1.6	if (getpixels() == 0)
570	gregl	2.27	eputs("cannot allocate colors\n");
571	greg	1.6	else
572			new_ctab(ncolors);
573	greg	2.8	mapped = 1;
574	greg	1.4	break;
575			case Expose:
576			fixwindow(levptr(XExposeEvent));
577			break;
578	greg	1.1	case KeyPress:
579			getkey(levptr(XKeyPressedEvent));
580			break;
581			case ButtonPress:
582			break;
583			}
584			}
585
586
587			static
588			getkey(ekey) /* get input key */
589			register XKeyPressedEvent *ekey;
590			{
591	greg	1.8	register int n;
592	greg	1.7
593			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
594	greg	1.1	NULL, NULL);
595	greg	1.7	c_last += n;
596			x11_driver.inpready += n;
597	greg	1.1	}
598
599
600			static
601			fixwindow(eexp) /* repair damage to window */
602			register XExposeEvent *eexp;
603			{
604	greg	2.21	char buf[80];
605
606	greg	1.4	if (eexp->window == gwind) {
607	greg	2.21	sprintf(buf, "repaint %d %d %d %d\n",
608	greg	1.4	eexp->x, gheight - eexp->y - eexp->height,
609	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
610	greg	2.21	tocombuf(buf, &x11_driver);
611	greg	1.4	} else if (eexp->window == comline->w) {
612			if (eexp->count == 0)
613			xt_redraw(comline);
614			}
615	greg	1.1	}
616	greg	1.4
617
618			static
619			resizewindow(ersz) /* resize window */
620			register XConfigureEvent *ersz;
621			{
622	greg	2.17	if (ersz->width == gwidth && ersz->height-comheight == gheight)
623	greg	1.4	return;
624
625			gwidth = ersz->width;
626	greg	2.17	gheight = ersz->height-comheight;
627	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
628			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
629
630	greg	2.21	tocombuf("new\n", &x11_driver);
631	greg	1.4	}