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>

#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();
        if (inpcheck == IC_IOCTL) {                     /* from stdin */
                if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
                        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);
                }
        }
}


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:	2.21
Committed:	Wed Oct 26 10:04:15 1994 UTC (29 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.20:	+7 -4 lines
Log Message:	changed getcombuf() to tocombuf() for multiple commands
#	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	1.1
18			#include <X11/Xlib.h>
19	greg	1.4	#include <X11/cursorfont.h>
20			#include <X11/Xutil.h>
21	greg	1.1
22			#include "color.h"
23			#include "driver.h"
24			#include "x11twind.h"
25	greg	1.18	#include "x11icon.h"
26	greg	1.1
27	greg	2.6	#define GAMMA 2.2 /* default exponent correction */
28	greg	1.1
29	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
30	greg	2.9	#define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
31	greg	1.4
32	greg	1.1	#define BORWIDTH 5 /* border width */
33			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
34
35			#define COMFN "8x13" /* command line font name */
36			#define COMLH 3 /* number of command lines */
37			#define COMCW 8 /* approx. character width (pixels) */
38			#define COMCH 14 /* approx. character height (pixels) */
39
40	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
41			#define ourroot RootWindow(ourdisplay,ourscreen)
42
43			#define levptr(etype) ((etype *)&currentevent)
44	greg	1.1
45	greg	1.4	static XEvent currentevent; /* current event */
46	greg	1.1
47			static int ncolors = 0; /* color table size */
48	greg	2.8	static int mapped = 0; /* window is mapped? */
49	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
50	greg	2.3	static unsigned long ourblack=0, ourwhite=1;
51	greg	1.1
52			static Display ourdisplay = NULL; / our display */
53
54	greg	2.2	static XVisualInfo ourvinfo; /* our visual information */
55	greg	1.6
56	greg	1.1	static Window gwind = 0; /* our graphics window */
57
58			static Cursor pickcursor = 0; /* cursor used for picking */
59
60	greg	1.4	static int gwidth, gheight; /* graphics window size */
61	greg	1.1
62	greg	2.17	static int comheight; /* desired comline height */
63	greg	1.1	static TEXTWIND comline = NULL; / our command line */
64
65			static char c_queue[64]; /* input queue */
66			static int c_first = 0; /* first character in queue */
67			static int c_last = 0; /* last character in queue */
68
69			static GC ourgc = 0; /* our graphics context for drawing */
70
71	greg	1.6	static Colormap ourmap = 0; /* our color map */
72	greg	1.1
73	greg	2.19	#define IC_X11 0
74			#define IC_IOCTL 1
75			#define IC_READ 2
76
77			static int inpcheck; /* whence to check input */
78
79	greg	2.21	extern char *malloc();
80	greg	1.1
81	greg	1.14	static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
82	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
83	greg	1.1
84	greg	2.17	static int std_comin(), std_comout();
85
86	greg	1.1	static struct driver x11_driver = {
87			x11_close, x11_clear, x11_paintr, x11_getcur,
88	greg	2.17	NULL, NULL, x11_flush, 1.0
89	greg	1.1	};
90
91	greg	2.13	static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
92			getevent(), getkey(), fixwindow(), x11_getc();
93	greg	2.11	static unsigned long true_pixel();
94	greg	1.1
95	greg	2.11
96	greg	1.1	struct driver *
97			x11_init(name, id) /* initialize driver */
98			char name, id;
99			{
100	greg	2.6	extern char *getenv();
101			char *gv;
102	greg	1.6	int nplanes;
103	greg	1.10	XSetWindowAttributes ourwinattr;
104	greg	1.4	XWMHints ourxwmhints;
105	greg	1.12	XSizeHints oursizhints;
106	greg	2.17	/* open display server */
107	greg	1.1	ourdisplay = XOpenDisplay(NULL);
108			if (ourdisplay == NULL) {
109			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
110			return(NULL);
111			}
112	greg	2.2	/* find a usable visual */
113	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
114	greg	2.4	if (XMatchVisualInfo(ourdisplay,ourscreen,
115			24,TrueColor,&ourvinfo) \|\|
116			XMatchVisualInfo(ourdisplay,ourscreen,
117			24,DirectColor,&ourvinfo)) {
118			ourblack = 0;
119			ourwhite = ourvinfo.red_mask \|
120			ourvinfo.green_mask \|
121			ourvinfo.blue_mask ;
122			} else {
123	greg	2.2	if (nplanes < 4) {
124			stderr_v("not enough colors\n");
125	greg	1.6	return(NULL);
126	greg	2.4	}
127			if (!XMatchVisualInfo(ourdisplay,ourscreen,
128	greg	2.2	nplanes,PseudoColor,&ourvinfo) &&
129			!XMatchVisualInfo(ourdisplay,ourscreen,
130			nplanes,GrayScale,&ourvinfo)) {
131			stderr_v("unsupported visual type\n");
132			return(NULL);
133	greg	1.6	}
134	greg	2.3	ourblack = BlackPixel(ourdisplay,ourscreen);
135			ourwhite = WhitePixel(ourdisplay,ourscreen);
136			}
137	greg	2.6	/* set gamma */
138	greg	2.14	if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
139	greg	2.18	\|\| (gv = getenv("DISPLAY_GAMMA")) != NULL)
140	greg	2.6	make_gmap(atof(gv));
141			else
142			make_gmap(GAMMA);
143	greg	2.17	/* X11 command line or no? */
144			if (!strcmp(name, "x11"))
145			comheight = COMHEIGHT;
146			else /* "x11d" */
147			comheight = 0;
148	greg	2.6	/* open window */
149	greg	1.12	ourwinattr.background_pixel = ourblack;
150	greg	1.10	ourwinattr.border_pixel = ourblack;
151	greg	2.4	/* this is stupid */
152	greg	2.2	ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
153			ourvinfo.visual, AllocNone);
154	greg	1.10	gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
155	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
156			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
157	greg	2.2	BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
158			CWBackPixel\|CWBorderPixel\|CWColormap, &ourwinattr);
159	greg	1.4	if (gwind == 0) {
160			stderr_v("cannot create window\n");
161			return(NULL);
162			}
163	greg	2.4	XStoreName(ourdisplay, gwind, id);
164	greg	1.10	/* create a cursor */
165			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
166	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
167	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
168	greg	1.4	ourxwmhints.input = True;
169	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
170			gwind, x11icon_bits, x11icon_width, x11icon_height);
171	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
172	greg	1.12	oursizhints.min_width = MINWIDTH;
173	greg	2.17	oursizhints.min_height = MINHEIGHT+comheight;
174	greg	1.12	oursizhints.flags = PMinSize;
175			XSetNormalHints(ourdisplay, gwind, &oursizhints);
176	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
177			XMapWindow(ourdisplay, gwind);
178	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
179	greg	1.4	gwidth = levptr(XExposeEvent)->width;
180	greg	2.17	gheight = levptr(XExposeEvent)->height - comheight;
181	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
182			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
183	greg	1.1	x11_driver.inpready = 0;
184	greg	2.8	mapped = 1;
185	greg	2.17	/* set i/o vectors */
186			if (comheight) {
187			x11_driver.comin = x11_comin;
188			x11_driver.comout = x11_comout;
189			cmdvec = x11_comout;
190			if (wrnvec != NULL)
191			wrnvec = x11_errout;
192	greg	2.19	inpcheck = IC_X11;
193	greg	2.17	} else {
194			x11_driver.comin = std_comin;
195			x11_driver.comout = std_comout;
196			cmdvec = std_comout;
197	greg	2.19	inpcheck = IC_IOCTL;
198	greg	2.17	}
199	greg	1.1	return(&x11_driver);
200			}
201
202
203			static
204			x11_close() /* close our display */
205			{
206			cmdvec = NULL; /* reset error vectors */
207			if (wrnvec != NULL)
208			wrnvec = stderr_v;
209			if (ourdisplay == NULL)
210			return;
211			if (comline != NULL) {
212			xt_close(comline);
213			comline = NULL;
214			}
215	greg	1.8	freepixels();
216			XFreeGC(ourdisplay, ourgc);
217			XDestroyWindow(ourdisplay, gwind);
218			gwind = 0;
219			ourgc = 0;
220	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
221			XCloseDisplay(ourdisplay);
222			ourdisplay = NULL;
223			}
224
225
226			static
227			x11_clear(xres, yres) /* clear our display */
228			int xres, yres;
229			{
230	greg	1.12	/* check limits */
231			if (xres < MINWIDTH)
232			xres = MINWIDTH;
233			if (yres < MINHEIGHT)
234			yres = MINHEIGHT;
235			/* resize window */
236			if (xres != gwidth \|\| yres != gheight) {
237	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
238	greg	2.17	XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
239	greg	1.1	gwidth = xres;
240			gheight = yres;
241	greg	1.8	XFlush(ourdisplay);
242			sleep(2); /* wait for window manager */
243	greg	1.4	XSync(ourdisplay, 1); /* discard input */
244			}
245	greg	1.13	XClearWindow(ourdisplay, gwind);
246			/* reinitialize color table */
247	greg	2.2	if (ourvinfo.class == PseudoColor \|\| ourvinfo.class == GrayScale)
248	greg	1.13	if (getpixels() == 0)
249			stderr_v("cannot allocate colors\n");
250			else
251			new_ctab(ncolors);
252	greg	1.12	/* get new command line */
253	greg	1.13	if (comline != NULL)
254			xt_close(comline);
255	greg	2.17	if (comheight) {
256			comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
257			comheight, 0, ourblack, ourwhite, COMFN);
258			if (comline == NULL) {
259			stderr_v("Cannot open command line window\n");
260			quit(1);
261			}
262			XSelectInput(ourdisplay, comline->w, ExposureMask);
263	greg	1.12	/* remove earmuffs */
264	greg	2.17	XSelectInput(ourdisplay, gwind,
265	greg	1.4	StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
266	greg	2.17	} else /* remove earmuffs */
267			XSelectInput(ourdisplay, gwind,
268			StructureNotifyMask\|ExposureMask\|ButtonPressMask);
269	greg	1.1	}
270
271
272			static
273			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
274			COLOR col;
275			int xmin, ymin, xmax, ymax;
276			{
277	greg	1.6	unsigned long pixel;
278	greg	1.1
279	greg	2.8	if (!mapped)
280			return;
281	greg	1.6	if (ncolors > 0)
282			pixel = pixval[get_pixel(col, xnewcolr)];
283	greg	2.8	else
284	greg	1.6	pixel = true_pixel(col);
285			XSetForeground(ourdisplay, ourgc, pixel);
286			XFillRectangle(ourdisplay, gwind,
287			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
288	greg	1.5	}
289
290
291			static
292			x11_flush() /* flush output */
293			{
294	greg	2.19	char buf[256];
295	greg	2.15	int n;
296	greg	2.16	/* check for input */
297	greg	1.10	XNoOp(ourdisplay);
298	greg	2.16	n = XPending(ourdisplay); /* from X server */
299			while (n-- > 0)
300	greg	1.5	getevent();
301	greg	2.19	if (inpcheck == IC_IOCTL) { /* from stdin */
302	greg	2.17	if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
303	greg	2.19	if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
304			stderr_v("Cannot change input mode\n");
305			quit(1);
306			}
307			inpcheck = IC_READ;
308			} else
309			x11_driver.inpready += n;
310			}
311			if (inpcheck == IC_READ) {
312			n = read(fileno(stdin), buf, sizeof(buf)-1);
313			if (n > 0) {
314			buf[n] = '\0';
315	greg	2.21	tocombuf(buf, &x11_driver);
316	greg	2.17	}
317	greg	2.15	}
318	greg	1.1	}
319
320
321			static
322	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
323			char inp, prompt;
324	greg	1.1	{
325	greg	2.15	if (prompt != NULL) {
326			x11_flush(); /* make sure we get everything */
327	greg	1.4	if (fromcombuf(inp, &x11_driver))
328			return;
329	greg	2.15	xt_puts(prompt, comline);
330			}
331	greg	1.1	xt_cursor(comline, TBLKCURS);
332			editline(inp, x11_getc, x11_comout);
333			xt_cursor(comline, TNOCURS);
334			}
335
336
337			static
338	greg	2.17	x11_comout(outp) /* output a string to command line */
339			char *outp;
340	greg	1.1	{
341	greg	1.11	if (comline == NULL)
342			return;
343	greg	2.17	xt_puts(outp, comline);
344			if (outp[strlen(outp)-1] == '\n')
345	greg	1.11	XFlush(ourdisplay);
346	greg	1.1	}
347
348
349			static
350			x11_errout(msg) /* output an error message */
351			char *msg;
352			{
353	greg	1.9	stderr_v(msg); /* send to stderr also! */
354	greg	1.1	x11_comout(msg);
355			}
356
357
358	greg	2.17	static
359			std_comin(inp, prompt) /* read in command line from stdin */
360			char inp, prompt;
361			{
362			extern char *gets();
363
364			if (prompt != NULL) {
365			if (fromcombuf(inp, &x11_driver))
366			return;
367			if (!x11_driver.inpready)
368			fputs(prompt, stdout);
369			}
370			if (gets(inp) == NULL) {
371			strcpy(inp, "quit");
372			return;
373			}
374			x11_driver.inpready -= strlen(inp) + 1;
375			if (x11_driver.inpready < 0)
376			x11_driver.inpready = 0;
377			}
378
379
380			static
381			std_comout(outp) /* write out string to stdout */
382			char *outp;
383			{
384			fputs(outp, stdout);
385	greg	2.20	fflush(stdout);
386	greg	2.17	}
387
388
389	greg	1.1	static int
390			x11_getcur(xp, yp) /* get cursor position */
391			int xp, yp;
392			{
393			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
394			GrabModeAsync, GrabModeAsync, None, pickcursor,
395			CurrentTime) != GrabSuccess)
396			sleep(2);
397
398			do
399			getevent();
400			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
401			*xp = levptr(XButtonPressedEvent)->x;
402			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
403			XUngrabPointer(ourdisplay, CurrentTime);
404			XFlush(ourdisplay); /* insure release */
405			if (c_last > c_first) /* key pressed */
406			return(x11_getc());
407			/* button pressed */
408	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button1)
409	greg	1.1	return(MB1);
410	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button2)
411	greg	1.1	return(MB2);
412	greg	2.10	if (levptr(XButtonPressedEvent)->button == Button3)
413	greg	1.1	return(MB3);
414			return(ABORT);
415			}
416
417
418			static
419			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
420			int ndx;
421			int r, g, b;
422			{
423			XColor xcolor;
424
425			xcolor.pixel = pixval[ndx];
426			xcolor.red = r << 8;
427			xcolor.green = g << 8;
428			xcolor.blue = b << 8;
429			xcolor.flags = DoRed\|DoGreen\|DoBlue;
430
431			XStoreColor(ourdisplay, ourmap, &xcolor);
432			}
433
434
435			static int
436			getpixels() /* get the color map */
437			{
438	greg	1.16	XColor thiscolor;
439			register int i, j;
440
441	greg	1.4	if (ncolors > 0)
442	greg	2.2	return(ncolors);
443			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
444	greg	1.6	ourmap = DefaultColormap(ourdisplay,ourscreen);
445			goto loop;
446			}
447			newmap:
448	greg	2.2	ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
449	greg	1.6	loop:
450	greg	2.2	for (ncolors = ourvinfo.colormap_size;
451			ncolors > ourvinfo.colormap_size/3;
452	greg	1.6	ncolors = ncolors*.937) {
453	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
454	greg	1.1	if (pixval == NULL)
455	greg	1.6	return(ncolors = 0);
456	greg	2.8	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
457	greg	1.6	break;
458	greg	1.1	free((char *)pixval);
459	greg	1.6	pixval = NULL;
460	greg	1.1	}
461	greg	1.6	if (pixval == NULL) {
462			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
463			goto newmap; /* try it with our map */
464			else
465			return(ncolors = 0); /* failed */
466			}
467	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
468			for (i = 0; i < ncolors; i++) { /* reset black and white */
469	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
470			continue;
471			thiscolor.pixel = pixval[i];
472			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
473			XQueryColor(ourdisplay,
474			DefaultColormap(ourdisplay,ourscreen),
475			&thiscolor);
476			XStoreColor(ourdisplay, ourmap, &thiscolor);
477			for (j = i; j+1 < ncolors; j++)
478			pixval[j] = pixval[j+1];
479			ncolors--;
480			i--;
481			}
482	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
483	greg	1.6	return(ncolors);
484	greg	1.1	}
485
486
487			static
488			freepixels() /* free our pixels */
489			{
490			if (ncolors == 0)
491			return;
492			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
493	greg	2.7	free((char *)pixval);
494			pixval = NULL;
495	greg	1.1	ncolors = 0;
496	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
497	greg	1.6	XFreeColormap(ourdisplay, ourmap);
498			ourmap = 0;
499	greg	1.1	}
500
501
502	greg	1.6	static unsigned long
503			true_pixel(col) /* return true pixel value for color */
504			COLOR col;
505			{
506			unsigned long rval;
507			BYTE rgb[3];
508
509			map_color(rgb, col);
510	greg	2.2	rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
511			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
512			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
513	greg	1.6	return(rval);
514			}
515
516
517	greg	1.1	static int
518			x11_getc() /* get a command character */
519			{
520			while (c_last <= c_first) {
521			c_first = c_last = 0; /* reset */
522			getevent(); /* wait for key */
523			}
524			x11_driver.inpready--;
525			return(c_queue[c_first++]);
526			}
527
528
529			static
530			getevent() /* get next event */
531			{
532			XNextEvent(ourdisplay, levptr(XEvent));
533			switch (levptr(XEvent)->type) {
534	greg	1.4	case ConfigureNotify:
535			resizewindow(levptr(XConfigureEvent));
536			break;
537			case UnmapNotify:
538	greg	2.8	mapped = 0;
539	greg	1.4	freepixels();
540			break;
541			case MapNotify:
542	greg	2.2	if (ourvinfo.class == PseudoColor \|\|
543			ourvinfo.class == GrayScale)
544	greg	1.6	if (getpixels() == 0)
545			stderr_v("Cannot allocate colors\n");
546			else
547			new_ctab(ncolors);
548	greg	2.8	mapped = 1;
549	greg	1.4	break;
550			case Expose:
551			fixwindow(levptr(XExposeEvent));
552			break;
553	greg	1.1	case KeyPress:
554			getkey(levptr(XKeyPressedEvent));
555			break;
556			case ButtonPress:
557			break;
558			}
559			}
560
561
562			static
563			getkey(ekey) /* get input key */
564			register XKeyPressedEvent *ekey;
565			{
566	greg	1.8	register int n;
567	greg	1.7
568			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
569	greg	1.1	NULL, NULL);
570	greg	1.7	c_last += n;
571			x11_driver.inpready += n;
572	greg	1.1	}
573
574
575			static
576			fixwindow(eexp) /* repair damage to window */
577			register XExposeEvent *eexp;
578			{
579	greg	2.21	char buf[80];
580
581	greg	1.4	if (eexp->window == gwind) {
582	greg	2.21	sprintf(buf, "repaint %d %d %d %d\n",
583	greg	1.4	eexp->x, gheight - eexp->y - eexp->height,
584	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
585	greg	2.21	tocombuf(buf, &x11_driver);
586	greg	1.4	} else if (eexp->window == comline->w) {
587			if (eexp->count == 0)
588			xt_redraw(comline);
589			}
590	greg	1.1	}
591	greg	1.4
592
593			static
594			resizewindow(ersz) /* resize window */
595			register XConfigureEvent *ersz;
596			{
597	greg	2.17	if (ersz->width == gwidth && ersz->height-comheight == gheight)
598	greg	1.4	return;
599
600			gwidth = ersz->width;
601	greg	2.17	gheight = ersz->height-comheight;
602	greg	1.4	x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
603			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
604
605	greg	2.21	tocombuf("new\n", &x11_driver);
606	greg	1.4	}