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;
        XSetWindowAttributes    ourwinattr;
        XWMHints  ourxwmhints;
        XSizeHints      oursizhints;

        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);
        /* open window */
        ourwinattr.background_pixel = ourblack;
        ourwinattr.border_pixel = ourblack;
        gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
                DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
                DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
                BORWIDTH, nplanes, InputOutput, ourvisual,
                CWBackPixel|CWBorderPixel, &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;
        ourxwmhints.input = True;
        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(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;
{
                                                /* destroy command line */
        if (comline != NULL)
                xt_close(comline);
                                                /* 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 */
        }
                                                /* get new command line */
        comline = xt_open(ourdisplay,
                        DefaultGC(ourdisplay,ourscreen),
                        gwind, 0, gheight, gwidth, COMHEIGHT, 0, COMFN);
        if (comline == NULL) {
                stderr_v("Cannot open command line window\n");
                quit(1);
        }
        XSelectInput(ourdisplay, comline->w, ExposureMask);
                                                /* clear graphics window */
        XClearWindow(ourdisplay, gwind);
                                                /* reinitialize color table */
        if (ourvisual->class == PseudoColor)
                if (getpixels() == 0)
                        stderr_v("cannot allocate colors\n");
                else
                        new_ctab(ncolors);
                                                /* remove earmuffs */
        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 */
{
        XNoOp(ourdisplay);
        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)
                return;
        xt_puts(out, comline);
        if (out[strlen(out)-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 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:	1.12
Committed:	Thu Mar 8 10:09:58 1990 UTC (34 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.11:	+29 -14 lines
Log Message:	put limit on minimum window resize
#	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	1.10	XSetWindowAttributes ourwinattr;
88	greg	1.4	XWMHints ourxwmhints;
89	greg	1.12	XSizeHints oursizhints;
90	greg	1.1
91			ourdisplay = XOpenDisplay(NULL);
92			if (ourdisplay == NULL) {
93			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
94			return(NULL);
95			}
96	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
97			if (nplanes < 4) {
98	greg	1.1	stderr_v("not enough colors\n");
99			return(NULL);
100	greg	1.6	} else if (nplanes <= 12) {
101			if (!XMatchVisualInfo(ourdisplay,ourscreen,
102			nplanes,PseudoColor,&ourvinfo)) {
103			stderr_v("PseudoColor not supported\n");
104			return(NULL);
105			}
106			} else if (!XMatchVisualInfo(ourdisplay,ourscreen,
107			nplanes,TrueColor,&ourvinfo)) {
108			stderr_v("TrueColor not supported\n");
109			return(NULL);
110	greg	1.1	}
111	greg	1.6	ourvisual = ourvinfo.visual;
112			make_gmap(GAMMA);
113	greg	1.4	/* open window */
114	greg	1.12	ourwinattr.background_pixel = ourblack;
115	greg	1.10	ourwinattr.border_pixel = ourblack;
116			gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
117	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
118			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
119	greg	1.10	BORWIDTH, nplanes, InputOutput, ourvisual,
120			CWBackPixel\|CWBorderPixel, &ourwinattr);
121	greg	1.4	if (gwind == 0) {
122			stderr_v("cannot create window\n");
123			return(NULL);
124			}
125			XStoreName(ourdisplay, gwind, id);
126	greg	1.10	/* create a cursor */
127			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
128	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
129			ourxwmhints.flags = InputHint;
130			ourxwmhints.input = True;
131			XSetWMHints(ourdisplay, gwind, &ourxwmhints);
132	greg	1.12	oursizhints.min_width = MINWIDTH;
133			oursizhints.min_height = MINHEIGHT+COMHEIGHT;
134			oursizhints.flags = PMinSize;
135			XSetNormalHints(ourdisplay, gwind, &oursizhints);
136	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
137			XMapWindow(ourdisplay, gwind);
138			XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
139			gwidth = levptr(XExposeEvent)->width;
140			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
141			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
142			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
143	greg	1.1	x11_driver.inpready = 0;
144			cmdvec = x11_comout; /* set error vectors */
145			if (wrnvec != NULL)
146			wrnvec = x11_errout;
147			return(&x11_driver);
148			}
149
150
151			static
152			x11_close() /* close our display */
153			{
154			cmdvec = NULL; /* reset error vectors */
155			if (wrnvec != NULL)
156			wrnvec = stderr_v;
157			if (ourdisplay == NULL)
158			return;
159			if (comline != NULL) {
160			xt_close(comline);
161			comline = NULL;
162			}
163	greg	1.8	freepixels();
164			XFreeGC(ourdisplay, ourgc);
165			XDestroyWindow(ourdisplay, gwind);
166			gwind = 0;
167			ourgc = 0;
168	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
169			XCloseDisplay(ourdisplay);
170			ourdisplay = NULL;
171			}
172
173
174			static
175			x11_clear(xres, yres) /* clear our display */
176			int xres, yres;
177			{
178	greg	1.12	/* destroy command line */
179			if (comline != NULL)
180			xt_close(comline);
181			/* check limits */
182			if (xres < MINWIDTH)
183			xres = MINWIDTH;
184			if (yres < MINHEIGHT)
185			yres = MINHEIGHT;
186			/* resize window */
187			if (xres != gwidth \|\| yres != gheight) {
188	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
189			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
190	greg	1.1	gwidth = xres;
191			gheight = yres;
192	greg	1.8	XFlush(ourdisplay);
193			sleep(2); /* wait for window manager */
194	greg	1.4	XSync(ourdisplay, 1); /* discard input */
195			}
196	greg	1.12	/* get new command line */
197			comline = xt_open(ourdisplay,
198			DefaultGC(ourdisplay,ourscreen),
199			gwind, 0, gheight, gwidth, COMHEIGHT, 0, COMFN);
200			if (comline == NULL) {
201			stderr_v("Cannot open command line window\n");
202			quit(1);
203			}
204			XSelectInput(ourdisplay, comline->w, ExposureMask);
205			/* clear graphics window */
206	greg	1.4	XClearWindow(ourdisplay, gwind);
207	greg	1.12	/* reinitialize color table */
208			if (ourvisual->class == PseudoColor)
209	greg	1.6	if (getpixels() == 0)
210			stderr_v("cannot allocate colors\n");
211			else
212			new_ctab(ncolors);
213	greg	1.12	/* remove earmuffs */
214	greg	1.4	XSelectInput(ourdisplay, gwind,
215			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
216	greg	1.1	}
217
218
219			static
220			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
221			COLOR col;
222			int xmin, ymin, xmax, ymax;
223			{
224			extern int xnewcolr(); /* pixel assignment routine */
225	greg	1.6	extern unsigned long true_pixel();
226			unsigned long pixel;
227	greg	1.1
228	greg	1.6	if (ncolors > 0)
229			pixel = pixval[get_pixel(col, xnewcolr)];
230			else if (ourvisual->class == TrueColor)
231			pixel = true_pixel(col);
232			else
233			return;
234			XSetForeground(ourdisplay, ourgc, pixel);
235			XFillRectangle(ourdisplay, gwind,
236			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
237	greg	1.5	}
238
239
240			static
241			x11_flush() /* flush output */
242			{
243	greg	1.10	XNoOp(ourdisplay);
244	greg	1.5	while (XPending(ourdisplay) > 0)
245			getevent();
246	greg	1.1	}
247
248
249			static
250	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
251			char inp, prompt;
252	greg	1.1	{
253			int x11_getc(), x11_comout();
254
255	greg	1.3	if (prompt != NULL)
256	greg	1.4	if (fromcombuf(inp, &x11_driver))
257			return;
258			else
259			xt_puts(prompt, comline);
260	greg	1.1	xt_cursor(comline, TBLKCURS);
261			editline(inp, x11_getc, x11_comout);
262			xt_cursor(comline, TNOCURS);
263			}
264
265
266			static
267			x11_comout(out) /* output a string to command line */
268			char *out;
269			{
270	greg	1.11	if (comline == NULL)
271			return;
272			xt_puts(out, comline);
273			if (out[strlen(out)-1] == '\n')
274			XFlush(ourdisplay);
275	greg	1.1	}
276
277
278			static
279			x11_errout(msg) /* output an error message */
280			char *msg;
281			{
282	greg	1.9	stderr_v(msg); /* send to stderr also! */
283	greg	1.1	x11_comout(msg);
284			}
285
286
287			static int
288			x11_getcur(xp, yp) /* get cursor position */
289			int xp, yp;
290			{
291			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
292			GrabModeAsync, GrabModeAsync, None, pickcursor,
293			CurrentTime) != GrabSuccess)
294			sleep(2);
295
296			do
297			getevent();
298			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
299			*xp = levptr(XButtonPressedEvent)->x;
300			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
301			XUngrabPointer(ourdisplay, CurrentTime);
302			XFlush(ourdisplay); /* insure release */
303			if (c_last > c_first) /* key pressed */
304			return(x11_getc());
305			/* button pressed */
306			if (levptr(XButtonPressedEvent)->button & Button1)
307			return(MB1);
308			if (levptr(XButtonPressedEvent)->button & Button2)
309			return(MB2);
310			if (levptr(XButtonPressedEvent)->button & Button3)
311			return(MB3);
312			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
313			return(MB1);
314			return(ABORT);
315			}
316
317
318			static
319			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
320			int ndx;
321			int r, g, b;
322			{
323			XColor xcolor;
324
325			xcolor.pixel = pixval[ndx];
326			xcolor.red = r << 8;
327			xcolor.green = g << 8;
328			xcolor.blue = b << 8;
329			xcolor.flags = DoRed\|DoGreen\|DoBlue;
330
331			XStoreColor(ourdisplay, ourmap, &xcolor);
332			}
333
334
335			static int
336			getpixels() /* get the color map */
337			{
338	greg	1.4	if (ncolors > 0)
339			return(ncolors);
340	greg	1.6	if (ourvisual == DefaultVisual(ourdisplay,ourscreen)) {
341			ourmap = DefaultColormap(ourdisplay,ourscreen);
342			goto loop;
343			}
344			newmap:
345			ourmap = XCreateColormap(ourdisplay,gwind,ourvisual,AllocNone);
346			loop:
347			for (ncolors = ourvisual->map_entries;
348			ncolors > ourvisual->map_entries/3;
349			ncolors = ncolors*.937) {
350	greg	1.1	pixval = (int )malloc(ncolorssizeof(int));
351			if (pixval == NULL)
352	greg	1.6	return(ncolors = 0);
353	greg	1.1	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
354			pixval,ncolors) != 0)
355	greg	1.6	break;
356	greg	1.1	free((char *)pixval);
357	greg	1.6	pixval = NULL;
358	greg	1.1	}
359	greg	1.6	if (pixval == NULL) {
360			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
361			goto newmap; /* try it with our map */
362			else
363			return(ncolors = 0); /* failed */
364			}
365			if (ourmap != DefaultColormap(ourdisplay,ourscreen)) {
366			XColor thiscolor;
367			register int i, j;
368			/* reset black and white */
369			for (i = 0; i < ncolors; i++) {
370			if (pixval[i] != ourblack && pixval[i] != ourwhite)
371			continue;
372			thiscolor.pixel = pixval[i];
373			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
374			XQueryColor(ourdisplay,
375			DefaultColormap(ourdisplay,ourscreen),
376			&thiscolor);
377			XStoreColor(ourdisplay, ourmap, &thiscolor);
378			for (j = i; j+1 < ncolors; j++)
379			pixval[j] = pixval[j+1];
380			ncolors--;
381			i--;
382			}
383			}
384			XSetWindowColormap(ourdisplay, gwind, ourmap);
385			return(ncolors);
386	greg	1.1	}
387
388
389			static
390			freepixels() /* free our pixels */
391			{
392			if (ncolors == 0)
393			return;
394			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
395			ncolors = 0;
396	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
397	greg	1.6	XFreeColormap(ourdisplay, ourmap);
398			ourmap = 0;
399	greg	1.1	}
400
401
402	greg	1.6	static unsigned long
403			true_pixel(col) /* return true pixel value for color */
404			COLOR col;
405			{
406			unsigned long rval;
407			BYTE rgb[3];
408
409			map_color(rgb, col);
410			rval = ourvisual->red_mask*rgb[RED]/255 & ourvisual->red_mask;
411			rval \|= ourvisual->green_mask*rgb[GRN]/255 & ourvisual->green_mask;
412			rval \|= ourvisual->blue_mask*rgb[BLU]/255 & ourvisual->blue_mask;
413			return(rval);
414			}
415
416
417	greg	1.1	static int
418			x11_getc() /* get a command character */
419			{
420			while (c_last <= c_first) {
421			c_first = c_last = 0; /* reset */
422			getevent(); /* wait for key */
423			}
424			x11_driver.inpready--;
425			return(c_queue[c_first++]);
426			}
427
428
429			static
430			getevent() /* get next event */
431			{
432			XNextEvent(ourdisplay, levptr(XEvent));
433			switch (levptr(XEvent)->type) {
434	greg	1.4	case ConfigureNotify:
435			resizewindow(levptr(XConfigureEvent));
436			break;
437			case UnmapNotify:
438			freepixels();
439			break;
440			case MapNotify:
441	greg	1.6	if (ourvisual->class == PseudoColor)
442			if (getpixels() == 0)
443			stderr_v("Cannot allocate colors\n");
444			else
445			new_ctab(ncolors);
446	greg	1.4	break;
447			case Expose:
448			fixwindow(levptr(XExposeEvent));
449			break;
450	greg	1.1	case KeyPress:
451			getkey(levptr(XKeyPressedEvent));
452			break;
453			case ButtonPress:
454			break;
455			}
456			}
457
458
459			static
460			getkey(ekey) /* get input key */
461			register XKeyPressedEvent *ekey;
462			{
463	greg	1.8	register int n;
464	greg	1.7
465			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
466	greg	1.1	NULL, NULL);
467	greg	1.7	c_last += n;
468			x11_driver.inpready += n;
469	greg	1.1	}
470
471
472			static
473			fixwindow(eexp) /* repair damage to window */
474			register XExposeEvent *eexp;
475			{
476	greg	1.4	if (eexp->window == gwind) {
477			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
478			eexp->x, gheight - eexp->y - eexp->height,
479	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
480	greg	1.4	} else if (eexp->window == comline->w) {
481			if (eexp->count == 0)
482			xt_redraw(comline);
483			}
484	greg	1.1	}
485	greg	1.4
486
487			static
488			resizewindow(ersz) /* resize window */
489			register XConfigureEvent *ersz;
490			{
491			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
492			return;
493
494			gwidth = ersz->width;
495			gheight = ersz->height-COMHEIGHT;
496			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
497			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
498
499			strcpy(getcombuf(&x11_driver), "new\n");
500			}