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  <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 */

extern char  *malloc(), *getcombuf();

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;
        } else {
                x11_driver.comin = std_comin;
                x11_driver.comout = std_comout;
                cmdvec = std_comout;
        }
        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 */
{
        int     n;
                                                /* check for input */
        XNoOp(ourdisplay);
        n = XPending(ourdisplay);                       /* from X server */
        while (n-- > 0)
                getevent();
        if (x11_driver.comin == std_comin) {            /* from stdin */
                if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
                        stderr_v("ioctl error on stdin\n");
                        quit(1);
                }
                x11_driver.inpready += n;
        }
}


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);
}


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;
{
        if (eexp->window == gwind) {
                sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
                        eexp->x, gheight - eexp->y - eexp->height,
                        eexp->x + eexp->width, gheight - eexp->y);
        } 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;

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