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;

        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 = ourwhite;
        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);
        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 */
{
        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)
                xt_puts(out, comline);
}


static
x11_errout(msg)                 /* output an error message */
char  *msg;
{
        stderr_v(msg);          /* send to stderr also! */
        x11_comout(msg);
        x11_flush();
}


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:	1.10
Committed:	Fri Mar 2 15:05:26 1990 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.9:	+9 -6 lines
Log Message:	changed call to XCreateWindow to support different visuals
#	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	1.1
90			ourdisplay = XOpenDisplay(NULL);
91			if (ourdisplay == NULL) {
92			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
93			return(NULL);
94			}
95	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
96			if (nplanes < 4) {
97	greg	1.1	stderr_v("not enough colors\n");
98			return(NULL);
99	greg	1.6	} else if (nplanes <= 12) {
100			if (!XMatchVisualInfo(ourdisplay,ourscreen,
101			nplanes,PseudoColor,&ourvinfo)) {
102			stderr_v("PseudoColor not supported\n");
103			return(NULL);
104			}
105			} else if (!XMatchVisualInfo(ourdisplay,ourscreen,
106			nplanes,TrueColor,&ourvinfo)) {
107			stderr_v("TrueColor not supported\n");
108			return(NULL);
109	greg	1.1	}
110	greg	1.6	ourvisual = ourvinfo.visual;
111			make_gmap(GAMMA);
112	greg	1.4	/* open window */
113	greg	1.10	ourwinattr.background_pixel = ourwhite;
114			ourwinattr.border_pixel = ourblack;
115			gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
116	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
117			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
118	greg	1.10	BORWIDTH, nplanes, InputOutput, ourvisual,
119			CWBackPixel\|CWBorderPixel, &ourwinattr);
120	greg	1.4	if (gwind == 0) {
121			stderr_v("cannot create window\n");
122			return(NULL);
123			}
124			XStoreName(ourdisplay, gwind, id);
125	greg	1.10	/* create a cursor */
126			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
127	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
128			ourxwmhints.flags = InputHint;
129			ourxwmhints.input = True;
130			XSetWMHints(ourdisplay, gwind, &ourxwmhints);
131			XSelectInput(ourdisplay, gwind, ExposureMask);
132			XMapWindow(ourdisplay, gwind);
133			XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XExposeEvent));
134			gwidth = levptr(XExposeEvent)->width;
135			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
136			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
137			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
138	greg	1.1	x11_driver.inpready = 0;
139			cmdvec = x11_comout; /* set error vectors */
140			if (wrnvec != NULL)
141			wrnvec = x11_errout;
142			return(&x11_driver);
143			}
144
145
146			static
147			x11_close() /* close our display */
148			{
149			cmdvec = NULL; /* reset error vectors */
150			if (wrnvec != NULL)
151			wrnvec = stderr_v;
152			if (ourdisplay == NULL)
153			return;
154			if (comline != NULL) {
155			xt_close(comline);
156			comline = NULL;
157			}
158	greg	1.8	freepixels();
159			XFreeGC(ourdisplay, ourgc);
160			XDestroyWindow(ourdisplay, gwind);
161			gwind = 0;
162			ourgc = 0;
163	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
164			XCloseDisplay(ourdisplay);
165			ourdisplay = NULL;
166			}
167
168
169			static
170			x11_clear(xres, yres) /* clear our display */
171			int xres, yres;
172			{
173			if (xres != gwidth \|\| yres != gheight) { /* change window */
174			if (comline != NULL)
175			xt_close(comline);
176	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
177			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
178	greg	1.1	comline = xt_open(ourdisplay,
179	greg	1.4	DefaultGC(ourdisplay,ourscreen),
180	greg	1.1	gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
181	greg	1.4	if (comline == NULL) {
182			stderr_v("Cannot open command line window\n");
183			quit(1);
184			}
185			XSelectInput(ourdisplay, comline->w, ExposureMask);
186	greg	1.1	gwidth = xres;
187			gheight = yres;
188	greg	1.8	XFlush(ourdisplay);
189			sleep(2); /* wait for window manager */
190	greg	1.4	XSync(ourdisplay, 1); /* discard input */
191			}
192			XClearWindow(ourdisplay, gwind);
193	greg	1.6	if (ourvisual->class == PseudoColor) /* reinitialize color table */
194			if (getpixels() == 0)
195			stderr_v("cannot allocate colors\n");
196			else
197			new_ctab(ncolors);
198	greg	1.4
199			XSelectInput(ourdisplay, gwind,
200			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
201	greg	1.1	}
202
203
204			static
205			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
206			COLOR col;
207			int xmin, ymin, xmax, ymax;
208			{
209			extern int xnewcolr(); /* pixel assignment routine */
210	greg	1.6	extern unsigned long true_pixel();
211			unsigned long pixel;
212	greg	1.1
213	greg	1.6	if (ncolors > 0)
214			pixel = pixval[get_pixel(col, xnewcolr)];
215			else if (ourvisual->class == TrueColor)
216			pixel = true_pixel(col);
217			else
218			return;
219			XSetForeground(ourdisplay, ourgc, pixel);
220			XFillRectangle(ourdisplay, gwind,
221			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
222	greg	1.5	}
223
224
225			static
226			x11_flush() /* flush output */
227			{
228	greg	1.10	XNoOp(ourdisplay);
229	greg	1.5	while (XPending(ourdisplay) > 0)
230			getevent();
231	greg	1.1	}
232
233
234			static
235	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
236			char inp, prompt;
237	greg	1.1	{
238			int x11_getc(), x11_comout();
239
240	greg	1.3	if (prompt != NULL)
241	greg	1.4	if (fromcombuf(inp, &x11_driver))
242			return;
243			else
244			xt_puts(prompt, comline);
245	greg	1.1	xt_cursor(comline, TBLKCURS);
246			editline(inp, x11_getc, x11_comout);
247			xt_cursor(comline, TNOCURS);
248			}
249
250
251			static
252			x11_comout(out) /* output a string to command line */
253			char *out;
254			{
255			if (comline != NULL)
256			xt_puts(out, comline);
257			}
258
259
260			static
261			x11_errout(msg) /* output an error message */
262			char *msg;
263			{
264	greg	1.9	stderr_v(msg); /* send to stderr also! */
265	greg	1.1	x11_comout(msg);
266	greg	1.9	x11_flush();
267	greg	1.1	}
268
269
270			static int
271			x11_getcur(xp, yp) /* get cursor position */
272			int xp, yp;
273			{
274			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
275			GrabModeAsync, GrabModeAsync, None, pickcursor,
276			CurrentTime) != GrabSuccess)
277			sleep(2);
278
279			do
280			getevent();
281			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
282			*xp = levptr(XButtonPressedEvent)->x;
283			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
284			XUngrabPointer(ourdisplay, CurrentTime);
285			XFlush(ourdisplay); /* insure release */
286			if (c_last > c_first) /* key pressed */
287			return(x11_getc());
288			/* button pressed */
289			if (levptr(XButtonPressedEvent)->button & Button1)
290			return(MB1);
291			if (levptr(XButtonPressedEvent)->button & Button2)
292			return(MB2);
293			if (levptr(XButtonPressedEvent)->button & Button3)
294			return(MB3);
295			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
296			return(MB1);
297			return(ABORT);
298			}
299
300
301			static
302			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
303			int ndx;
304			int r, g, b;
305			{
306			XColor xcolor;
307
308			xcolor.pixel = pixval[ndx];
309			xcolor.red = r << 8;
310			xcolor.green = g << 8;
311			xcolor.blue = b << 8;
312			xcolor.flags = DoRed\|DoGreen\|DoBlue;
313
314			XStoreColor(ourdisplay, ourmap, &xcolor);
315			}
316
317
318			static int
319			getpixels() /* get the color map */
320			{
321	greg	1.4	if (ncolors > 0)
322			return(ncolors);
323	greg	1.6	if (ourvisual == DefaultVisual(ourdisplay,ourscreen)) {
324			ourmap = DefaultColormap(ourdisplay,ourscreen);
325			goto loop;
326			}
327			newmap:
328			ourmap = XCreateColormap(ourdisplay,gwind,ourvisual,AllocNone);
329			loop:
330			for (ncolors = ourvisual->map_entries;
331			ncolors > ourvisual->map_entries/3;
332			ncolors = ncolors*.937) {
333	greg	1.1	pixval = (int )malloc(ncolorssizeof(int));
334			if (pixval == NULL)
335	greg	1.6	return(ncolors = 0);
336	greg	1.1	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
337			pixval,ncolors) != 0)
338	greg	1.6	break;
339	greg	1.1	free((char *)pixval);
340	greg	1.6	pixval = NULL;
341	greg	1.1	}
342	greg	1.6	if (pixval == NULL) {
343			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
344			goto newmap; /* try it with our map */
345			else
346			return(ncolors = 0); /* failed */
347			}
348			if (ourmap != DefaultColormap(ourdisplay,ourscreen)) {
349			XColor thiscolor;
350			register int i, j;
351			/* reset black and white */
352			for (i = 0; i < ncolors; i++) {
353			if (pixval[i] != ourblack && pixval[i] != ourwhite)
354			continue;
355			thiscolor.pixel = pixval[i];
356			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
357			XQueryColor(ourdisplay,
358			DefaultColormap(ourdisplay,ourscreen),
359			&thiscolor);
360			XStoreColor(ourdisplay, ourmap, &thiscolor);
361			for (j = i; j+1 < ncolors; j++)
362			pixval[j] = pixval[j+1];
363			ncolors--;
364			i--;
365			}
366			}
367			XSetWindowColormap(ourdisplay, gwind, ourmap);
368			return(ncolors);
369	greg	1.1	}
370
371
372			static
373			freepixels() /* free our pixels */
374			{
375			if (ncolors == 0)
376			return;
377			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
378			ncolors = 0;
379	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
380	greg	1.6	XFreeColormap(ourdisplay, ourmap);
381			ourmap = 0;
382	greg	1.1	}
383
384
385	greg	1.6	static unsigned long
386			true_pixel(col) /* return true pixel value for color */
387			COLOR col;
388			{
389			unsigned long rval;
390			BYTE rgb[3];
391
392			map_color(rgb, col);
393			rval = ourvisual->red_mask*rgb[RED]/255 & ourvisual->red_mask;
394			rval \|= ourvisual->green_mask*rgb[GRN]/255 & ourvisual->green_mask;
395			rval \|= ourvisual->blue_mask*rgb[BLU]/255 & ourvisual->blue_mask;
396			return(rval);
397			}
398
399
400	greg	1.1	static int
401			x11_getc() /* get a command character */
402			{
403			while (c_last <= c_first) {
404			c_first = c_last = 0; /* reset */
405			getevent(); /* wait for key */
406			}
407			x11_driver.inpready--;
408			return(c_queue[c_first++]);
409			}
410
411
412			static
413			getevent() /* get next event */
414			{
415			XNextEvent(ourdisplay, levptr(XEvent));
416			switch (levptr(XEvent)->type) {
417	greg	1.4	case ConfigureNotify:
418			resizewindow(levptr(XConfigureEvent));
419			break;
420			case UnmapNotify:
421			freepixels();
422			break;
423			case MapNotify:
424	greg	1.6	if (ourvisual->class == PseudoColor)
425			if (getpixels() == 0)
426			stderr_v("Cannot allocate colors\n");
427			else
428			new_ctab(ncolors);
429	greg	1.4	break;
430			case Expose:
431			fixwindow(levptr(XExposeEvent));
432			break;
433	greg	1.1	case KeyPress:
434			getkey(levptr(XKeyPressedEvent));
435			break;
436			case ButtonPress:
437			break;
438			}
439			}
440
441
442			static
443			getkey(ekey) /* get input key */
444			register XKeyPressedEvent *ekey;
445			{
446	greg	1.8	register int n;
447	greg	1.7
448			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
449	greg	1.1	NULL, NULL);
450	greg	1.7	c_last += n;
451			x11_driver.inpready += n;
452	greg	1.1	}
453
454
455			static
456			fixwindow(eexp) /* repair damage to window */
457			register XExposeEvent *eexp;
458			{
459	greg	1.4	if (eexp->window == gwind) {
460			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
461			eexp->x, gheight - eexp->y - eexp->height,
462	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
463	greg	1.4	} else if (eexp->window == comline->w) {
464			if (eexp->count == 0)
465			xt_redraw(comline);
466			}
467	greg	1.1	}
468	greg	1.4
469
470			static
471			resizewindow(ersz) /* resize window */
472			register XConfigureEvent *ersz;
473			{
474			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
475			return;
476
477			gwidth = ersz->width;
478			gheight = ersz->height-COMHEIGHT;
479			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
480			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
481
482			strcpy(getcombuf(&x11_driver), "new\n");
483			}