src/rt/x11.c

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

/* Copyright (c) 1989 Regents of the University of California */

/*
 *  x11.c - driver for X-windows version 11.3
 *
 *     Jan 1990
 */

#include  <stdio.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"

#define GAMMA           2.2             /* exponent for color correction */

#define MINWIDTH        (32*COMCW)      /* minimum graphics window width */
#define MINHEIGHT       MINWIDTH        /* 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  ourwhite       WhitePixel(ourdisplay,ourscreen)
#define  ourblack       BlackPixel(ourdisplay,ourscreen)

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

static XEvent  currentevent;            /* current event */

static int  ncolors = 0;                /* color table size */
static int  *pixval = NULL;             /* allocated pixels */

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

static Visual  *ourvisual;              /* our visual structure */

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

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

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

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();

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

static struct driver  x11_driver = {
        x11_close, x11_clear, x11_paintr, x11_getcur,
        x11_comout, x11_comin, x11_flush, 1.0
};


struct driver *
x11_init(name, id)              /* initialize driver */
char  *name, *id;
{
        int  nplanes;
        XVisualInfo  ourvinfo;
        XWMHints  ourxwmhints;

        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL) {
                stderr_v("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
        nplanes = DisplayPlanes(ourdisplay, ourscreen);
        if (nplanes < 4) {
                stderr_v("not enough colors\n");
                return(NULL);
        } else if (nplanes <= 12) {
                if (!XMatchVisualInfo(ourdisplay,ourscreen,
                                nplanes,PseudoColor,&ourvinfo)) {
                        stderr_v("PseudoColor not supported\n");
                        return(NULL);
                }
        } else if (!XMatchVisualInfo(ourdisplay,ourscreen,
                        nplanes,TrueColor,&ourvinfo)) {
                stderr_v("TrueColor not supported\n");
                return(NULL);
        }
        ourvisual = ourvinfo.visual;
        make_gmap(GAMMA);
        /* create a cursor */
        pickcursor = XCreateFontCursor (ourdisplay, XC_diamond_cross);
        /* open window */
        gwind = XCreateSimpleWindow(ourdisplay, ourroot, 0, 0,
                DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
                DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
                BORWIDTH, ourblack, ourwhite);
        if (gwind == 0) {
                stderr_v("cannot create window\n");
                return(NULL);
        }
        XStoreName(ourdisplay, gwind, id);
        ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
        ourxwmhints.flags = InputHint;
        ourxwmhints.input = True;
        XSetWMHints(ourdisplay, gwind, &ourxwmhints);
        XSelectInput(ourdisplay, gwind, ExposureMask);
        XMapWindow(ourdisplay, gwind);
        XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
        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;
        cmdvec = x11_comout;                    /* set error vectors */
        if (wrnvec != NULL)
                wrnvec = x11_errout;
        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;
{
        if (xres != gwidth || yres != gheight) {        /* change window */
                if (comline != NULL)
                        xt_close(comline);
                XSelectInput(ourdisplay, gwind, 0);
                XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
                comline = xt_open(ourdisplay,
                                DefaultGC(ourdisplay,ourscreen),
                                gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
                if (comline == NULL) {
                        stderr_v("Cannot open command line window\n");
                        quit(1);
                }
                XSelectInput(ourdisplay, comline->w, ExposureMask);
                gwidth = xres;
                gheight = yres;
                XFlush(ourdisplay);
                sleep(2);                       /* wait for window manager */
                XSync(ourdisplay, 1);           /* discard input */
        }
        XClearWindow(ourdisplay, gwind);
        if (ourvisual->class == PseudoColor)    /* reinitialize color table */
                if (getpixels() == 0)
                        stderr_v("cannot allocate colors\n");
                else
                        new_ctab(ncolors);

        XSelectInput(ourdisplay, gwind,
                StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
}


static
x11_paintr(col, xmin, ymin, xmax, ymax)         /* fill a rectangle */
COLOR  col;
int  xmin, ymin, xmax, ymax;
{
        extern int  xnewcolr();         /* pixel assignment routine */
        extern unsigned long  true_pixel();
        unsigned long  pixel;

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


static
x11_flush()                     /* flush output */
{
        if (ncolors <= 0 && ourvisual->class != TrueColor)      /* dummy */
                XFillRectangle(ourdisplay, gwind, ourgc, 0, 0, 1 ,1);
        while (XPending(ourdisplay) > 0)
                getevent();
}


static
x11_comin(inp, prompt)          /* read in a command line */
char  *inp, *prompt;
{
        int  x11_getc(), x11_comout();

        if (prompt != NULL)
                if (fromcombuf(inp, &x11_driver))
                        return;
                else
                        xt_puts(prompt, comline);
        xt_cursor(comline, TBLKCURS);
        editline(inp, x11_getc, x11_comout);
        xt_cursor(comline, TNOCURS);
}


static
x11_comout(out)                 /* output a string to command line */
char  *out;
{
        if (comline != NULL)
                xt_puts(out, comline);
}


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


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);
        if (levptr(XButtonPressedEvent)->button & (Button4|Button5))
                return(MB1);
        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 */
{
        if (ncolors > 0)
                return(ncolors);
        if (ourvisual == DefaultVisual(ourdisplay,ourscreen)) {
                ourmap = DefaultColormap(ourdisplay,ourscreen);
                goto loop;
        }
newmap:
        ourmap = XCreateColormap(ourdisplay,gwind,ourvisual,AllocNone);
loop:
        for (ncolors = ourvisual->map_entries;
                        ncolors > ourvisual->map_entries/3;
                        ncolors = ncolors*.937) {
                pixval = (int *)malloc(ncolors*sizeof(int));
                if (pixval == NULL)
                        return(ncolors = 0);
                if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
                                pixval,ncolors) != 0)
                        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)) {
                XColor  thiscolor;
                register int  i, j;
                                                /* reset black and white */
                for (i = 0; i < ncolors; i++) {
                        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);
        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 = ourvisual->red_mask*rgb[RED]/255 & ourvisual->red_mask;
        rval |= ourvisual->green_mask*rgb[GRN]/255 & ourvisual->green_mask;
        rval |= ourvisual->blue_mask*rgb[BLU]/255 & ourvisual->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:
                freepixels();
                break;
        case MapNotify:
                if (ourvisual->class == PseudoColor)
                        if (getpixels() == 0)
                                stderr_v("Cannot allocate colors\n");
                        else
                                new_ctab(ncolors);
                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:	1.8
Committed:	Thu Mar 1 08:22:44 1990 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+10 -13 lines
Log Message:	minor changes
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2			static char SCCSid[] = "$SunId$ LBL";
3			#endif
4
5			/* Copyright (c) 1989 Regents of the University of California */
6
7			/*
8	greg	1.4	* x11.c - driver for X-windows version 11.3
9	greg	1.1	*
10	greg	1.4	* Jan 1990
11	greg	1.1	*/
12
13			#include <stdio.h>
14
15			#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
25			#define GAMMA 2.2 /* exponent for color correction */
26
27	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
28			#define MINHEIGHT MINWIDTH /* minimum graphics window height */
29	greg	1.4
30	greg	1.1	#define BORWIDTH 5 /* border width */
31			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
32
33			#define COMFN "8x13" /* command line font name */
34			#define COMLH 3 /* number of command lines */
35			#define COMCW 8 /* approx. character width (pixels) */
36			#define COMCH 14 /* approx. character height (pixels) */
37
38	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
39			#define ourroot RootWindow(ourdisplay,ourscreen)
40			#define ourwhite WhitePixel(ourdisplay,ourscreen)
41			#define ourblack BlackPixel(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			static int pixval = NULL; / allocated pixels */
49
50			static Display ourdisplay = NULL; / our display */
51
52	greg	1.6	static Visual ourvisual; / our visual structure */
53
54	greg	1.1	static Window gwind = 0; /* our graphics window */
55
56			static Cursor pickcursor = 0; /* cursor used for picking */
57
58	greg	1.4	static int gwidth, gheight; /* graphics window size */
59	greg	1.1
60			static TEXTWIND comline = NULL; / our command line */
61
62			static char c_queue[64]; /* input queue */
63			static int c_first = 0; /* first character in queue */
64			static int c_last = 0; /* last character in queue */
65
66			static GC ourgc = 0; /* our graphics context for drawing */
67
68	greg	1.6	static Colormap ourmap = 0; /* our color map */
69	greg	1.1
70			extern char *malloc();
71
72			int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
73	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
74	greg	1.1
75			static struct driver x11_driver = {
76			x11_close, x11_clear, x11_paintr, x11_getcur,
77	greg	1.5	x11_comout, x11_comin, x11_flush, 1.0
78	greg	1.1	};
79
80
81			struct driver *
82			x11_init(name, id) /* initialize driver */
83			char name, id;
84			{
85	greg	1.6	int nplanes;
86			XVisualInfo ourvinfo;
87	greg	1.4	XWMHints ourxwmhints;
88	greg	1.1
89			ourdisplay = XOpenDisplay(NULL);
90			if (ourdisplay == NULL) {
91			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
92			return(NULL);
93			}
94	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
95			if (nplanes < 4) {
96	greg	1.1	stderr_v("not enough colors\n");
97			return(NULL);
98	greg	1.6	} else if (nplanes <= 12) {
99			if (!XMatchVisualInfo(ourdisplay,ourscreen,
100			nplanes,PseudoColor,&ourvinfo)) {
101			stderr_v("PseudoColor not supported\n");
102			return(NULL);
103			}
104			} else if (!XMatchVisualInfo(ourdisplay,ourscreen,
105			nplanes,TrueColor,&ourvinfo)) {
106			stderr_v("TrueColor not supported\n");
107			return(NULL);
108	greg	1.1	}
109	greg	1.6	ourvisual = ourvinfo.visual;
110			make_gmap(GAMMA);
111	greg	1.1	/* create a cursor */
112			pickcursor = XCreateFontCursor (ourdisplay, XC_diamond_cross);
113	greg	1.4	/* open window */
114			gwind = XCreateSimpleWindow(ourdisplay, ourroot, 0, 0,
115			DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
116			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
117			BORWIDTH, ourblack, ourwhite);
118			if (gwind == 0) {
119			stderr_v("cannot create window\n");
120			return(NULL);
121			}
122			XStoreName(ourdisplay, gwind, id);
123			ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
124			ourxwmhints.flags = InputHint;
125			ourxwmhints.input = True;
126			XSetWMHints(ourdisplay, gwind, &ourxwmhints);
127			XSelectInput(ourdisplay, gwind, ExposureMask);
128			XMapWindow(ourdisplay, gwind);
129			XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
130			gwidth = levptr(XExposeEvent)->width;
131			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
132			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
133			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
134	greg	1.1	x11_driver.inpready = 0;
135			cmdvec = x11_comout; /* set error vectors */
136			if (wrnvec != NULL)
137			wrnvec = x11_errout;
138			return(&x11_driver);
139			}
140
141
142			static
143			x11_close() /* close our display */
144			{
145			cmdvec = NULL; /* reset error vectors */
146			if (wrnvec != NULL)
147			wrnvec = stderr_v;
148			if (ourdisplay == NULL)
149			return;
150			if (comline != NULL) {
151			xt_close(comline);
152			comline = NULL;
153			}
154	greg	1.8	freepixels();
155			XFreeGC(ourdisplay, ourgc);
156			XDestroyWindow(ourdisplay, gwind);
157			gwind = 0;
158			ourgc = 0;
159	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
160			XCloseDisplay(ourdisplay);
161			ourdisplay = NULL;
162			}
163
164
165			static
166			x11_clear(xres, yres) /* clear our display */
167			int xres, yres;
168			{
169			if (xres != gwidth \|\| yres != gheight) { /* change window */
170			if (comline != NULL)
171			xt_close(comline);
172	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
173			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
174	greg	1.1	comline = xt_open(ourdisplay,
175	greg	1.4	DefaultGC(ourdisplay,ourscreen),
176	greg	1.1	gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
177	greg	1.4	if (comline == NULL) {
178			stderr_v("Cannot open command line window\n");
179			quit(1);
180			}
181			XSelectInput(ourdisplay, comline->w, ExposureMask);
182	greg	1.1	gwidth = xres;
183			gheight = yres;
184	greg	1.8	XFlush(ourdisplay);
185			sleep(2); /* wait for window manager */
186	greg	1.4	XSync(ourdisplay, 1); /* discard input */
187			}
188			XClearWindow(ourdisplay, gwind);
189	greg	1.6	if (ourvisual->class == PseudoColor) /* reinitialize color table */
190			if (getpixels() == 0)
191			stderr_v("cannot allocate colors\n");
192			else
193			new_ctab(ncolors);
194	greg	1.4
195			XSelectInput(ourdisplay, gwind,
196			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
197	greg	1.1	}
198
199
200			static
201			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
202			COLOR col;
203			int xmin, ymin, xmax, ymax;
204			{
205			extern int xnewcolr(); /* pixel assignment routine */
206	greg	1.6	extern unsigned long true_pixel();
207			unsigned long pixel;
208	greg	1.1
209	greg	1.6	if (ncolors > 0)
210			pixel = pixval[get_pixel(col, xnewcolr)];
211			else if (ourvisual->class == TrueColor)
212			pixel = true_pixel(col);
213			else
214			return;
215			XSetForeground(ourdisplay, ourgc, pixel);
216			XFillRectangle(ourdisplay, gwind,
217			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
218	greg	1.5	}
219
220
221			static
222			x11_flush() /* flush output */
223			{
224	greg	1.8	if (ncolors <= 0 && ourvisual->class != TrueColor) /* dummy */
225	greg	1.5	XFillRectangle(ourdisplay, gwind, ourgc, 0, 0, 1 ,1);
226			while (XPending(ourdisplay) > 0)
227			getevent();
228	greg	1.1	}
229
230
231			static
232	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
233			char inp, prompt;
234	greg	1.1	{
235			int x11_getc(), x11_comout();
236
237	greg	1.3	if (prompt != NULL)
238	greg	1.4	if (fromcombuf(inp, &x11_driver))
239			return;
240			else
241			xt_puts(prompt, comline);
242	greg	1.1	xt_cursor(comline, TBLKCURS);
243			editline(inp, x11_getc, x11_comout);
244			xt_cursor(comline, TNOCURS);
245			}
246
247
248			static
249			x11_comout(out) /* output a string to command line */
250			char *out;
251			{
252			if (comline != NULL)
253			xt_puts(out, comline);
254			}
255
256
257			static
258			x11_errout(msg) /* output an error message */
259			char *msg;
260			{
261			x11_comout(msg);
262			stderr_v(msg); /* send to stderr also! */
263			}
264
265
266			static int
267			x11_getcur(xp, yp) /* get cursor position */
268			int xp, yp;
269			{
270			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
271			GrabModeAsync, GrabModeAsync, None, pickcursor,
272			CurrentTime) != GrabSuccess)
273			sleep(2);
274
275			do
276			getevent();
277			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
278			*xp = levptr(XButtonPressedEvent)->x;
279			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
280			XUngrabPointer(ourdisplay, CurrentTime);
281			XFlush(ourdisplay); /* insure release */
282			if (c_last > c_first) /* key pressed */
283			return(x11_getc());
284			/* button pressed */
285			if (levptr(XButtonPressedEvent)->button & Button1)
286			return(MB1);
287			if (levptr(XButtonPressedEvent)->button & Button2)
288			return(MB2);
289			if (levptr(XButtonPressedEvent)->button & Button3)
290			return(MB3);
291			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
292			return(MB1);
293			return(ABORT);
294			}
295
296
297			static
298			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
299			int ndx;
300			int r, g, b;
301			{
302			XColor xcolor;
303
304			xcolor.pixel = pixval[ndx];
305			xcolor.red = r << 8;
306			xcolor.green = g << 8;
307			xcolor.blue = b << 8;
308			xcolor.flags = DoRed\|DoGreen\|DoBlue;
309
310			XStoreColor(ourdisplay, ourmap, &xcolor);
311			}
312
313
314			static int
315			getpixels() /* get the color map */
316			{
317	greg	1.4	if (ncolors > 0)
318			return(ncolors);
319	greg	1.6	if (ourvisual == DefaultVisual(ourdisplay,ourscreen)) {
320			ourmap = DefaultColormap(ourdisplay,ourscreen);
321			goto loop;
322			}
323			newmap:
324			ourmap = XCreateColormap(ourdisplay,gwind,ourvisual,AllocNone);
325			loop:
326			for (ncolors = ourvisual->map_entries;
327			ncolors > ourvisual->map_entries/3;
328			ncolors = ncolors*.937) {
329	greg	1.1	pixval = (int )malloc(ncolorssizeof(int));
330			if (pixval == NULL)
331	greg	1.6	return(ncolors = 0);
332	greg	1.1	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
333			pixval,ncolors) != 0)
334	greg	1.6	break;
335	greg	1.1	free((char *)pixval);
336	greg	1.6	pixval = NULL;
337	greg	1.1	}
338	greg	1.6	if (pixval == NULL) {
339			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
340			goto newmap; /* try it with our map */
341			else
342			return(ncolors = 0); /* failed */
343			}
344			if (ourmap != DefaultColormap(ourdisplay,ourscreen)) {
345			XColor thiscolor;
346			register int i, j;
347			/* reset black and white */
348			for (i = 0; i < ncolors; i++) {
349			if (pixval[i] != ourblack && pixval[i] != ourwhite)
350			continue;
351			thiscolor.pixel = pixval[i];
352			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
353			XQueryColor(ourdisplay,
354			DefaultColormap(ourdisplay,ourscreen),
355			&thiscolor);
356			XStoreColor(ourdisplay, ourmap, &thiscolor);
357			for (j = i; j+1 < ncolors; j++)
358			pixval[j] = pixval[j+1];
359			ncolors--;
360			i--;
361			}
362			}
363			XSetWindowColormap(ourdisplay, gwind, ourmap);
364			return(ncolors);
365	greg	1.1	}
366
367
368			static
369			freepixels() /* free our pixels */
370			{
371			if (ncolors == 0)
372			return;
373			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
374			ncolors = 0;
375	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
376	greg	1.6	XFreeColormap(ourdisplay, ourmap);
377			ourmap = 0;
378	greg	1.1	}
379
380
381	greg	1.6	static unsigned long
382			true_pixel(col) /* return true pixel value for color */
383			COLOR col;
384			{
385			unsigned long rval;
386			BYTE rgb[3];
387
388			map_color(rgb, col);
389			rval = ourvisual->red_mask*rgb[RED]/255 & ourvisual->red_mask;
390			rval \|= ourvisual->green_mask*rgb[GRN]/255 & ourvisual->green_mask;
391			rval \|= ourvisual->blue_mask*rgb[BLU]/255 & ourvisual->blue_mask;
392			return(rval);
393			}
394
395
396	greg	1.1	static int
397			x11_getc() /* get a command character */
398			{
399			while (c_last <= c_first) {
400			c_first = c_last = 0; /* reset */
401			getevent(); /* wait for key */
402			}
403			x11_driver.inpready--;
404			return(c_queue[c_first++]);
405			}
406
407
408			static
409			getevent() /* get next event */
410			{
411			XNextEvent(ourdisplay, levptr(XEvent));
412			switch (levptr(XEvent)->type) {
413	greg	1.4	case ConfigureNotify:
414			resizewindow(levptr(XConfigureEvent));
415			break;
416			case UnmapNotify:
417			freepixels();
418			break;
419			case MapNotify:
420	greg	1.6	if (ourvisual->class == PseudoColor)
421			if (getpixels() == 0)
422			stderr_v("Cannot allocate colors\n");
423			else
424			new_ctab(ncolors);
425	greg	1.4	break;
426			case Expose:
427			fixwindow(levptr(XExposeEvent));
428			break;
429	greg	1.1	case KeyPress:
430			getkey(levptr(XKeyPressedEvent));
431			break;
432			case ButtonPress:
433			break;
434			}
435			}
436
437
438			static
439			getkey(ekey) /* get input key */
440			register XKeyPressedEvent *ekey;
441			{
442	greg	1.8	register int n;
443	greg	1.7
444			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
445	greg	1.1	NULL, NULL);
446	greg	1.7	c_last += n;
447			x11_driver.inpready += n;
448	greg	1.1	}
449
450
451			static
452			fixwindow(eexp) /* repair damage to window */
453			register XExposeEvent *eexp;
454			{
455	greg	1.4	if (eexp->window == gwind) {
456			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
457			eexp->x, gheight - eexp->y - eexp->height,
458	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
459	greg	1.4	} else if (eexp->window == comline->w) {
460			if (eexp->count == 0)
461			xt_redraw(comline);
462			}
463	greg	1.1	}
464	greg	1.4
465
466			static
467			resizewindow(ersz) /* resize window */
468			register XConfigureEvent *ersz;
469			{
470			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
471			return;
472
473			gwidth = ersz->width;
474			gheight = ersz->height-COMHEIGHT;
475			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
476			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
477
478			strcpy(getcombuf(&x11_driver), "new\n");
479			}