src/rt/x11.c

/* Copyright (c) 1992 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  <stdio.h>
#include  <math.h>
#include  <sys/ioctl.h>
#include  <fcntl.h>
#ifdef sparc
#include  <sys/conf.h>
#include  <sys/file.h>
#include  <sys/filio.h>
#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) {
                stderr_v("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
                                        /* find a usable visual */
        nplanes = DisplayPlanes(ourdisplay, ourscreen);
        if (XMatchVisualInfo(ourdisplay,ourscreen,
                                24,TrueColor,&ourvinfo) ||
                        XMatchVisualInfo(ourdisplay,ourscreen,
                                24,DirectColor,&ourvinfo)) {
                ourblack = 0;
                ourwhite = ourvinfo.red_mask |
                                ourvinfo.green_mask |
                                ourvinfo.blue_mask ;
        } else {
                if (nplanes < 4) {
                        stderr_v("not enough colors\n");
                        return(NULL);
                }
                if (!XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,PseudoColor,&ourvinfo) &&
                                !XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,GrayScale,&ourvinfo)) {
                        stderr_v("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;
                                        /* 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) {
                stderr_v("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;
                cmdvec = x11_comout;
                if (wrnvec != NULL)
                        wrnvec = x11_errout;
                inpcheck = IC_X11;
        } else {
                x11_driver.comin = std_comin;
                x11_driver.comout = std_comout;
                cmdvec = std_comout;
                inpcheck = IC_IOCTL;
        }
        return(&x11_driver);
}


static
x11_close()                     /* close our display */
{
        cmdvec = NULL;                          /* reset error vectors */
        if (wrnvec != NULL)
                wrnvec = stderr_v;
        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)
                        stderr_v("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) {
                        stderr_v("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) {
                                stderr_v("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)
                return;
        xt_puts(outp, comline);
        if (outp[strlen(outp)-1] == '\n')
                XFlush(ourdisplay);
}


static
x11_errout(msg)                 /* output an error message */
char  *msg;
{
        stderr_v(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)
                        fputs(prompt, stdout);
        }
        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)
                                stderr_v("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:	2.23
Committed:	Mon Dec 12 16:47:29 1994 UTC (29 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.22:	+5 -0 lines
Log Message:	added appropriate headers for Solaris (I hope)
#	User	Rev	Content
1	greg	2.4	/* Copyright (c) 1992 Regents of the University of California */
2
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			#include <stdio.h>
14	greg	2.12	#include <math.h>
15	greg	1.1	#include <sys/ioctl.h>
16	greg	2.19	#include <fcntl.h>
17	greg	2.23	#ifdef sparc
18			#include <sys/conf.h>
19			#include <sys/file.h>
20			#include <sys/filio.h>
21			#endif
22	greg	1.1
23			#include <X11/Xlib.h>
24	greg	1.4	#include <X11/cursorfont.h>
25			#include <X11/Xutil.h>
26	greg	1.1
27			#include "color.h"
28			#include "driver.h"
29			#include "x11twind.h"
30	greg	1.18	#include "x11icon.h"
31	greg	1.1
32	greg	2.6	#define GAMMA 2.2 /* default exponent correction */
33	greg	1.1
34	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
35	greg	2.9	#define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
36	greg	1.4
37	greg	1.1	#define BORWIDTH 5 /* border width */
38			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
39
40			#define COMFN "8x13" /* command line font name */
41			#define COMLH 3 /* number of command lines */
42			#define COMCW 8 /* approx. character width (pixels) */
43			#define COMCH 14 /* approx. character height (pixels) */
44
45	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
46			#define ourroot RootWindow(ourdisplay,ourscreen)
47
48			#define levptr(etype) ((etype *)&currentevent)
49	greg	1.1
50	greg	1.4	static XEvent currentevent; /* current event */
51	greg	1.1
52			static int ncolors = 0; /* color table size */
53	greg	2.8	static int mapped = 0; /* window is mapped? */
54	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
55	greg	2.3	static unsigned long ourblack=0, ourwhite=1;
56	greg	1.1
57			static Display ourdisplay = NULL; / our display */
58
59	greg	2.2	static XVisualInfo ourvinfo; /* our visual information */
60	greg	1.6
61	greg	1.1	static Window gwind = 0; /* our graphics window */
62
63			static Cursor pickcursor = 0; /* cursor used for picking */
64
65	greg	1.4	static int gwidth, gheight; /* graphics window size */
66	greg	1.1
67	greg	2.17	static int comheight; /* desired comline height */
68	greg	1.1	static TEXTWIND comline = NULL; / our command line */
69
70			static char c_queue[64]; /* input queue */
71			static int c_first = 0; /* first character in queue */
72			static int c_last = 0; /* last character in queue */
73
74			static GC ourgc = 0; /* our graphics context for drawing */
75
76	greg	1.6	static Colormap ourmap = 0; /* our color map */
77	greg	1.1
78	greg	2.19	#define IC_X11 0
79			#define IC_IOCTL 1
80			#define IC_READ 2
81
82			static int inpcheck; /* whence to check input */
83
84	greg	2.21	extern char *malloc();
85	greg	1.1
86	greg	1.14	static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
87	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
88	greg	1.1
89	greg	2.17	static int std_comin(), std_comout();
90
91	greg	1.1	static struct driver x11_driver = {
92			x11_close, x11_clear, x11_paintr, x11_getcur,
93	greg	2.17	NULL, NULL, x11_flush, 1.0
94	greg	1.1	};
95
96	greg	2.13	static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
97			getevent(), getkey(), fixwindow(), x11_getc();
98	greg	2.11	static unsigned long true_pixel();
99	greg	1.1
100	greg	2.11
101	greg	1.1	struct driver *
102			x11_init(name, id) /* initialize driver */
103			char name, id;
104			{
105	greg	2.6	extern char *getenv();
106			char *gv;
107	greg	1.6	int nplanes;
108	greg	1.10	XSetWindowAttributes ourwinattr;
109	greg	1.4	XWMHints ourxwmhints;
110	greg	1.12	XSizeHints oursizhints;
111	greg	2.17	/* open display server */
112	greg	1.1	ourdisplay = XOpenDisplay(NULL);
113			if (ourdisplay == NULL) {
114			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
115			return(NULL);
116			}
117	greg	2.2	/* find a usable visual */
118	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
119	greg	2.4	if (XMatchVisualInfo(ourdisplay,ourscreen,
120			24,TrueColor,&ourvinfo) \|\|
121			XMatchVisualInfo(ourdisplay,ourscreen,
122			24,DirectColor,&ourvinfo)) {
123			ourblack = 0;
124			ourwhite = ourvinfo.red_mask \|
125			ourvinfo.green_mask \|
126			ourvinfo.blue_mask ;
127			} else {
128	greg	2.2	if (nplanes < 4) {
129			stderr_v("not enough colors\n");
130	greg	1.6	return(NULL);
131	greg	2.4	}
132			if (!XMatchVisualInfo(ourdisplay,ourscreen,
133	greg	2.2	nplanes,PseudoColor,&ourvinfo) &&
134			!XMatchVisualInfo(ourdisplay,ourscreen,
135			nplanes,GrayScale,&ourvinfo)) {
136			stderr_v("unsupported visual type\n");
137			return(NULL);
138	greg	1.6	}
139	greg	2.3	ourblack = BlackPixel(ourdisplay,ourscreen);
140			ourwhite = WhitePixel(ourdisplay,ourscreen);
141			}
142	greg	2.6	/* set gamma */
143	greg	2.14	if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
144	greg	2.18	\|\| (gv = getenv("DISPLAY_GAMMA")) != NULL)
145	greg	2.6	make_gmap(atof(gv));
146			else
147			make_gmap(GAMMA);
148	greg	2.17	/* X11 command line or no? */
149			if (!strcmp(name, "x11"))
150			comheight = COMHEIGHT;
151			else /* "x11d" */
152			comheight = 0;
153	greg	2.6	/* open window */
154	greg	1.12	ourwinattr.background_pixel = ourblack;
155	greg	1.10	ourwinattr.border_pixel = ourblack;
156	greg	2.4	/* this is stupid */
157	greg	2.2	ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
158			ourvinfo.visual, AllocNone);
159	greg	1.10	gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
160	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
161			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
162	greg	2.2	BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
163			CWBackPixel\|CWBorderPixel\|CWColormap, &ourwinattr);
164	greg	1.4	if (gwind == 0) {
165			stderr_v("cannot create window\n");
166			return(NULL);
167			}
168	greg	2.4	XStoreName(ourdisplay, gwind, id);
169	greg	1.10	/* create a cursor */
170			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
171	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
172	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
173	greg	1.4	ourxwmhints.input = True;
174	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
175			gwind, x11icon_bits, x11icon_width, x11icon_height);
176	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
177	greg	1.12	oursizhints.min_width = MINWIDTH;
178	greg	2.17	oursizhints.min_height = MINHEIGHT+comheight;
179	greg	1.12	oursizhints.flags = PMinSize;
180			XSetNormalHints(ourdisplay, gwind, &oursizhints);
181	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
182			XMapWindow(ourdisplay, gwind);
183	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
184	greg	1.4	gwidth = levptr(XExposeEvent)->width;
185	greg	2.17	gheight = levptr(XExposeEvent)->height - comheight;
186	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
187			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
188	greg	1.1	x11_driver.inpready = 0;
189	greg	2.8	mapped = 1;
190	greg	2.17	/* set i/o vectors */
191			if (comheight) {
192			x11_driver.comin = x11_comin;
193			x11_driver.comout = x11_comout;
194			cmdvec = x11_comout;
195			if (wrnvec != NULL)
196			wrnvec = x11_errout;
197	greg	2.19	inpcheck = IC_X11;
198	greg	2.17	} else {
199			x11_driver.comin = std_comin;
200			x11_driver.comout = std_comout;
201			cmdvec = std_comout;
202	greg	2.19	inpcheck = IC_IOCTL;
203	greg	2.17	}
204	greg	1.1	return(&x11_driver);
205			}
206
207
208			static
209			x11_close() /* close our display */
210			{
211			cmdvec = NULL; /* reset error vectors */
212			if (wrnvec != NULL)
213			wrnvec = stderr_v;
214			if (ourdisplay == NULL)
215			return;
216			if (comline != NULL) {
217			xt_close(comline);
218			comline = NULL;
219			}
220	greg	1.8	freepixels();
221			XFreeGC(ourdisplay, ourgc);
222			XDestroyWindow(ourdisplay, gwind);
223			gwind = 0;
224			ourgc = 0;
225	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
226			XCloseDisplay(ourdisplay);
227			ourdisplay = NULL;
228			}
229
230
231			static
232			x11_clear(xres, yres) /* clear our display */
233			int xres, yres;
234			{
235	greg	1.12	/* check limits */
236			if (xres < MINWIDTH)
237			xres = MINWIDTH;
238			if (yres < MINHEIGHT)
239			yres = MINHEIGHT;
240			/* resize window */
241			if (xres != gwidth \|\| yres != gheight) {
242	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
243	greg	2.17	XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
244	greg	1.1	gwidth = xres;
245			gheight = yres;
246	greg	1.8	XFlush(ourdisplay);
247			sleep(2); /* wait for window manager */
248	greg	1.4	XSync(ourdisplay, 1); /* discard input */
249			}
250	greg	1.13	XClearWindow(ourdisplay, gwind);
251			/* reinitialize color table */
252	greg	2.2	if (ourvinfo.class == PseudoColor \|\| ourvinfo.class == GrayScale)
253	greg	1.13	if (getpixels() == 0)
254			stderr_v("cannot allocate colors\n");
255			else
256			new_ctab(ncolors);
257	greg	1.12	/* get new command line */
258	greg	1.13	if (comline != NULL)
259			xt_close(comline);
260	greg	2.17	if (comheight) {
261			comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
262			comheight, 0, ourblack, ourwhite, COMFN);
263			if (comline == NULL) {
264			stderr_v("Cannot open command line window\n");
265			quit(1);
266			}
267			XSelectInput(ourdisplay, comline->w, ExposureMask);
268	greg	1.12	/* remove earmuffs */
269	greg	2.17	XSelectInput(ourdisplay, gwind,
270	greg	1.4	StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
271	greg	2.17	} else /* remove earmuffs */
272			XSelectInput(ourdisplay, gwind,
273			StructureNotifyMask\|ExposureMask\|ButtonPressMask);
274	greg	1.1	}
275
276
277			static
278			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
279			COLOR col;
280			int xmin, ymin, xmax, ymax;
281			{
282	greg	1.6	unsigned long pixel;
283	greg	1.1
284	greg	2.8	if (!mapped)
285			return;
286	greg	1.6	if (ncolors > 0)
287			pixel = pixval[get_pixel(col, xnewcolr)];
288	greg	2.8	else
289	greg	1.6	pixel = true_pixel(col);
290			XSetForeground(ourdisplay, ourgc, pixel);
291			XFillRectangle(ourdisplay, gwind,
292			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
293	greg	1.5	}
294
295
296			static
297			x11_flush() /* flush output */
298			{
299	greg	2.19	char buf[256];
300	greg	2.15	int n;
301	greg	2.16	/* check for input */
302	greg	1.10	XNoOp(ourdisplay);
303	greg	2.16	n = XPending(ourdisplay); /* from X server */
304			while (n-- > 0)
305	greg	1.5	getevent();
306	greg	2.22	#ifdef FNDELAY
307	greg	2.19	if (inpcheck == IC_IOCTL) { /* from stdin */
308	greg	2.22	#ifdef FIONREAD
309	greg	2.17	if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
310	greg	2.22	#else
311			if (1) {
312			#endif
313	greg	2.19	if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
314			stderr_v("Cannot change input mode\n");
315			quit(1);
316			}
317			inpcheck = IC_READ;
318			} else
319			x11_driver.inpready += n;
320			}
321			if (inpcheck == IC_READ) {
322			n = read(fileno(stdin), buf, sizeof(buf)-1);
323			if (n > 0) {
324			buf[n] = '\0';
325	greg	2.21	tocombuf(buf, &x11_driver);
326	greg	2.17	}
327	greg	2.15	}
328	greg	2.22	#endif
329	greg	1.1	}
330
331
332			static
333	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
334			char inp, prompt;
335	greg	1.1	{
336	greg	2.15	if (prompt != NULL) {
337			x11_flush(); /* make sure we get everything */
338	greg	1.4	if (fromcombuf(inp, &x11_driver))
339			return;
340	greg	2.15	xt_puts(prompt, comline);
341			}
342	greg	1.1	xt_cursor(comline, TBLKCURS);
343			editline(inp, x11_getc, x11_comout);
344			xt_cursor(comline, TNOCURS);
345			}
346
347
348			static
349	greg	2.17	x11_comout(outp) /* output a string to command line */
350			char *outp;
351	greg	1.1	{
352	greg	1.11	if (comline == NULL)
353			return;
354	greg	2.17	xt_puts(outp, comline);
355			if (outp[strlen(outp)-1] == '\n')
356	greg	1.11	XFlush(ourdisplay);
357	greg	1.1	}
358
359
360			static
361			x11_errout(msg) /* output an error message */
362			char *msg;
363			{
364	greg	1.9	stderr_v(msg); /* send to stderr also! */
365	greg	1.1	x11_comout(msg);
366			}
367
368
369	greg	2.17	static
370			std_comin(inp, prompt) /* read in command line from stdin */
371			char inp, prompt;
372			{
373			extern char *gets();
374
375			if (prompt != NULL) {
376			if (fromcombuf(inp, &x11_driver))
377			return;
378			if (!x11_driver.inpready)
379			fputs(prompt, stdout);
380			}
381			if (gets(inp) == NULL) {
382			strcpy(inp, "quit");
383			return;
384			}
385			x11_driver.inpready -= strlen(inp) + 1;
386			if (x11_driver.inpready < 0)
387			x11_driver.inpready = 0;
388			}
389
390
391			static
392			std_comout(outp) /* write out string to stdout */
393			char *outp;
394			{
395			fputs(outp, stdout);
396	greg	2.20	fflush(stdout);
397	greg	2.17	}
398
399
400	greg	1.1	static int
401			x11_getcur(xp, yp) /* get cursor position */
402			int xp, yp;
403			{
404			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
405			GrabModeAsync, GrabModeAsync, None, pickcursor,
406			CurrentTime) != GrabSuccess)
407			sleep(2);
408
409			do
410			getevent();
411			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
412			*xp = levptr(XButtonPressedEvent)->x;
413			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
414			XUngrabPointer(ourdisplay, CurrentTime);
415			XFlush(ourdisplay); /* insure release */
416			if (c_last > c_first) /* key pressed */
417			return(x11_getc());
418			/* button pressed */
419	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button1)
420	greg	1.1	return(MB1);
421	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button2)
422	greg	1.1	return(MB2);
423	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button3)
424	greg	1.1	return(MB3);
425			return(ABORT);
426			}
427
428
429			static
430			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
431			int ndx;
432			int r, g, b;
433			{
434			XColor xcolor;
435
436			xcolor.pixel = pixval[ndx];
437			xcolor.red = r << 8;
438			xcolor.green = g << 8;
439			xcolor.blue = b << 8;
440			xcolor.flags = DoRed\|DoGreen\|DoBlue;
441
442			XStoreColor(ourdisplay, ourmap, &xcolor);
443			}
444
445
446			static int
447			getpixels() /* get the color map */
448			{
449	greg	1.16	XColor thiscolor;
450			register int i, j;
451
452	greg	1.4	if (ncolors > 0)
453	greg	2.2	return(ncolors);
454			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
455	greg	1.6	ourmap = DefaultColormap(ourdisplay,ourscreen);
456			goto loop;
457			}
458			newmap:
459	greg	2.2	ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
460	greg	1.6	loop:
461	greg	2.2	for (ncolors = ourvinfo.colormap_size;
462			ncolors > ourvinfo.colormap_size/3;
463	greg	1.6	ncolors = ncolors*.937) {
464	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
465	greg	1.1	if (pixval == NULL)
466	greg	1.6	return(ncolors = 0);
467	greg	2.8	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
468	greg	1.6	break;
469	greg	1.1	free((char *)pixval);
470	greg	1.6	pixval = NULL;
471	greg	1.1	}
472	greg	1.6	if (pixval == NULL) {
473			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
474			goto newmap; /* try it with our map */
475			else
476			return(ncolors = 0); /* failed */
477			}
478	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
479			for (i = 0; i < ncolors; i++) { /* reset black and white */
480	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
481			continue;
482			thiscolor.pixel = pixval[i];
483			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
484			XQueryColor(ourdisplay,
485			DefaultColormap(ourdisplay,ourscreen),
486			&thiscolor);
487			XStoreColor(ourdisplay, ourmap, &thiscolor);
488			for (j = i; j+1 < ncolors; j++)
489			pixval[j] = pixval[j+1];
490			ncolors--;
491			i--;
492			}
493	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
494	greg	1.6	return(ncolors);
495	greg	1.1	}
496
497
498			static
499			freepixels() /* free our pixels */
500			{
501			if (ncolors == 0)
502			return;
503			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
504	greg	2.7	free((char *)pixval);
505			pixval = NULL;
506	greg	1.1	ncolors = 0;
507	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
508	greg	1.6	XFreeColormap(ourdisplay, ourmap);
509			ourmap = 0;
510	greg	1.1	}
511
512
513	greg	1.6	static unsigned long
514			true_pixel(col) /* return true pixel value for color */
515			COLOR col;
516			{
517			unsigned long rval;
518			BYTE rgb[3];
519
520			map_color(rgb, col);
521	greg	2.2	rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
522			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
523			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
524	greg	1.6	return(rval);
525			}
526
527
528	greg	1.1	static int
529			x11_getc() /* get a command character */
530			{
531			while (c_last <= c_first) {
532			c_first = c_last = 0; /* reset */
533			getevent(); /* wait for key */
534			}
535			x11_driver.inpready--;
536			return(c_queue[c_first++]);
537			}
538
539
540			static
541			getevent() /* get next event */
542			{
543			XNextEvent(ourdisplay, levptr(XEvent));
544			switch (levptr(XEvent)->type) {
545	greg	1.4	case ConfigureNotify:
546			resizewindow(levptr(XConfigureEvent));
547			break;
548			case UnmapNotify:
549	greg	2.8	mapped = 0;
550	greg	1.4	freepixels();
551			break;
552			case MapNotify:
553	greg	2.2	if (ourvinfo.class == PseudoColor \|\|
554			ourvinfo.class == GrayScale)
555	greg	1.6	if (getpixels() == 0)
556			stderr_v("Cannot allocate colors\n");
557			else
558			new_ctab(ncolors);
559	greg	2.8	mapped = 1;
560	greg	1.4	break;
561			case Expose:
562			fixwindow(levptr(XExposeEvent));
563			break;
564	greg	1.1	case KeyPress:
565			getkey(levptr(XKeyPressedEvent));
566			break;
567			case ButtonPress:
568			break;
569			}
570			}
571
572
573			static
574			getkey(ekey) /* get input key */
575			register XKeyPressedEvent *ekey;
576			{
577	greg	1.8	register int n;
578	greg	1.7
579			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
580	greg	1.1	NULL, NULL);
581	greg	1.7	c_last += n;
582			x11_driver.inpready += n;
583	greg	1.1	}
584
585
586			static
587			fixwindow(eexp) /* repair damage to window */
588			register XExposeEvent *eexp;
589			{
590	greg	2.21	char buf[80];
591
592	greg	1.4	if (eexp->window == gwind) {
593	greg	2.21	sprintf(buf, "repaint %d %d %d %d\n",
594	greg	1.4	eexp->x, gheight - eexp->y - eexp->height,
595	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
596	greg	2.21	tocombuf(buf, &x11_driver);
597	greg	1.4	} else if (eexp->window == comline->w) {
598			if (eexp->count == 0)
599			xt_redraw(comline);
600			}
601	greg	1.1	}
602	greg	1.4
603
604			static
605			resizewindow(ersz) /* resize window */
606			register XConfigureEvent *ersz;
607			{
608	greg	2.17	if (ersz->width == gwidth && ersz->height-comheight == gheight)
609	greg	1.4	return;
610
611			gwidth = ersz->width;
612	greg	2.17	gheight = ersz->height-comheight;
613	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
614			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
615
616	greg	2.21	tocombuf("new\n", &x11_driver);
617	greg	1.4	}