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"
#include  "x11icon.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 unsigned long  *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(), *getcombuf();

static 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 server required\n");
                        return(NULL);
                }
        } else if (!XMatchVisualInfo(ourdisplay,ourscreen,
                        nplanes,TrueColor,&ourvinfo) &&
                                                /* kludge for DirectColor */
                        !XMatchVisualInfo(ourdisplay,ourscreen,
                        nplanes,DirectColor,&ourvinfo)) {
                stderr_v("TrueColor server required\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|IconPixmapHint;
        ourxwmhints.input = True;
        ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
                        gwind, x11icon_bits, x11icon_width, x11icon_height);
        XSetWMHints(ourdisplay, gwind, &ourxwmhints);
        oursizhints.min_width = MINWIDTH;
        oursizhints.min_height = MINHEIGHT+COMHEIGHT;
        oursizhints.flags = PMinSize;
        XSetNormalHints(ourdisplay, gwind, &oursizhints);
        XSelectInput(ourdisplay, gwind, ExposureMask);
        XMapWindow(ourdisplay, gwind);
        XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
        gwidth = levptr(XExposeEvent)->width;
        gheight = levptr(XExposeEvent)->height - COMHEIGHT;
        x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
        x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
        x11_driver.inpready = 0;
        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;
{
                                                /* check limits */
        if (xres < MINWIDTH)
                xres = MINWIDTH;
        if (yres < MINHEIGHT)
                yres = MINHEIGHT;
                                                /* resize window */
        if (xres != gwidth || yres != gheight) {
                XSelectInput(ourdisplay, gwind, 0);
                XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
                gwidth = xres;
                gheight = yres;
                XFlush(ourdisplay);
                sleep(2);                       /* wait for window manager */
                XSync(ourdisplay, 1);           /* discard input */
        }
        XClearWindow(ourdisplay, gwind);
                                                /* reinitialize color table */
        if (ourvisual->class == PseudoColor)
                if (getpixels() == 0)
                        stderr_v("cannot allocate colors\n");
                else
                        new_ctab(ncolors);
                                                /* get new command line */
        if (comline != NULL)
                xt_close(comline);
        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);
                                                /* 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 != PseudoColor)
                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;
{
        extern int  x11_getc();

        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 */
{
        XColor  thiscolor;
        register int  i, j;

        if (ncolors > 0)
                goto donecolors;
        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 = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
                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))
                for (i = 0; i < ncolors; i++) { /* reset black and white */
                        if (pixval[i] != ourblack && pixval[i] != ourwhite)
                                continue;
                        thiscolor.pixel = pixval[i];
                        thiscolor.flags = DoRed|DoGreen|DoBlue;
                        XQueryColor(ourdisplay,
                                        DefaultColormap(ourdisplay,ourscreen),
                                        &thiscolor);
                        XStoreColor(ourdisplay, ourmap, &thiscolor);
                        for (j = i; j+1 < ncolors; j++)
                                pixval[j] = pixval[j+1];
                        ncolors--;
                        i--;
                }
        XSetWindowColormap(ourdisplay, gwind, ourmap);
donecolors:
#ifdef  DEBUG
        thiscolor.flags = DoRed|DoGreen|DoBlue;
        thiscolor.red = thiscolor.green = thiscolor.blue = 0;
        for (i = 0; i < ncolors; i++) {
                thiscolor.pixel = pixval[i];
                XStoreColor(ourdisplay, ourmap, &thiscolor);
        }
#endif
        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:	1.18
Committed:	Fri Apr 19 15:02:54 1991 UTC (33 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.17:	+4 -1 lines
Log Message:	added icon bitmap
#	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	greg	1.18	#include "x11icon.h"
25	greg	1.1
26			#define GAMMA 2.2 /* exponent for color correction */
27
28	greg	1.6	#define MINWIDTH (32COMCW) / minimum graphics window width */
29			#define MINHEIGHT MINWIDTH /* minimum graphics window height */
30	greg	1.4
31	greg	1.1	#define BORWIDTH 5 /* border width */
32			#define COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
33
34			#define COMFN "8x13" /* command line font name */
35			#define COMLH 3 /* number of command lines */
36			#define COMCW 8 /* approx. character width (pixels) */
37			#define COMCH 14 /* approx. character height (pixels) */
38
39	greg	1.4	#define ourscreen DefaultScreen(ourdisplay)
40			#define ourroot RootWindow(ourdisplay,ourscreen)
41			#define ourwhite WhitePixel(ourdisplay,ourscreen)
42			#define ourblack BlackPixel(ourdisplay,ourscreen)
43
44			#define levptr(etype) ((etype *)&currentevent)
45	greg	1.1
46	greg	1.4	static XEvent currentevent; /* current event */
47	greg	1.1
48			static int ncolors = 0; /* color table size */
49	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
50	greg	1.1
51			static Display ourdisplay = NULL; / our display */
52
53	greg	1.6	static Visual ourvisual; / our visual structure */
54
55	greg	1.1	static Window gwind = 0; /* our graphics window */
56
57			static Cursor pickcursor = 0; /* cursor used for picking */
58
59	greg	1.4	static int gwidth, gheight; /* graphics window size */
60	greg	1.1
61			static TEXTWIND comline = NULL; / our command line */
62
63			static char c_queue[64]; /* input queue */
64			static int c_first = 0; /* first character in queue */
65			static int c_last = 0; /* last character in queue */
66
67			static GC ourgc = 0; /* our graphics context for drawing */
68
69	greg	1.6	static Colormap ourmap = 0; /* our color map */
70	greg	1.1
71	greg	1.14	extern char malloc(), getcombuf();
72	greg	1.1
73	greg	1.14	static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
74	greg	1.5	x11_getcur(), x11_comout(), x11_comin(), x11_flush();
75	greg	1.1
76			static struct driver x11_driver = {
77			x11_close, x11_clear, x11_paintr, x11_getcur,
78	greg	1.5	x11_comout, x11_comin, x11_flush, 1.0
79	greg	1.1	};
80
81
82			struct driver *
83			x11_init(name, id) /* initialize driver */
84			char name, id;
85			{
86	greg	1.6	int nplanes;
87			XVisualInfo ourvinfo;
88	greg	1.10	XSetWindowAttributes ourwinattr;
89	greg	1.4	XWMHints ourxwmhints;
90	greg	1.12	XSizeHints oursizhints;
91	greg	1.1
92			ourdisplay = XOpenDisplay(NULL);
93			if (ourdisplay == NULL) {
94			stderr_v("cannot open X-windows; DISPLAY variable set?\n");
95			return(NULL);
96			}
97	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
98			if (nplanes < 4) {
99	greg	1.1	stderr_v("not enough colors\n");
100			return(NULL);
101	greg	1.6	} else if (nplanes <= 12) {
102			if (!XMatchVisualInfo(ourdisplay,ourscreen,
103			nplanes,PseudoColor,&ourvinfo)) {
104	greg	1.15	stderr_v("PseudoColor server required\n");
105	greg	1.6	return(NULL);
106			}
107			} else if (!XMatchVisualInfo(ourdisplay,ourscreen,
108	greg	1.15	nplanes,TrueColor,&ourvinfo) &&
109			/* kludge for DirectColor */
110			!XMatchVisualInfo(ourdisplay,ourscreen,
111			nplanes,DirectColor,&ourvinfo)) {
112			stderr_v("TrueColor server required\n");
113	greg	1.6	return(NULL);
114	greg	1.1	}
115	greg	1.6	ourvisual = ourvinfo.visual;
116			make_gmap(GAMMA);
117	greg	1.4	/* open window */
118	greg	1.12	ourwinattr.background_pixel = ourblack;
119	greg	1.10	ourwinattr.border_pixel = ourblack;
120			gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
121	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
122			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
123	greg	1.10	BORWIDTH, nplanes, InputOutput, ourvisual,
124			CWBackPixel\|CWBorderPixel, &ourwinattr);
125	greg	1.4	if (gwind == 0) {
126			stderr_v("cannot create window\n");
127			return(NULL);
128			}
129			XStoreName(ourdisplay, gwind, id);
130	greg	1.10	/* create a cursor */
131			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
132	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
133	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
134	greg	1.4	ourxwmhints.input = True;
135	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
136			gwind, x11icon_bits, x11icon_width, x11icon_height);
137	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
138	greg	1.12	oursizhints.min_width = MINWIDTH;
139			oursizhints.min_height = MINHEIGHT+COMHEIGHT;
140			oursizhints.flags = PMinSize;
141			XSetNormalHints(ourdisplay, gwind, &oursizhints);
142	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
143			XMapWindow(ourdisplay, gwind);
144	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
145	greg	1.4	gwidth = levptr(XExposeEvent)->width;
146			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
147			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
148			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
149	greg	1.1	x11_driver.inpready = 0;
150			cmdvec = x11_comout; /* set error vectors */
151			if (wrnvec != NULL)
152			wrnvec = x11_errout;
153			return(&x11_driver);
154			}
155
156
157			static
158			x11_close() /* close our display */
159			{
160			cmdvec = NULL; /* reset error vectors */
161			if (wrnvec != NULL)
162			wrnvec = stderr_v;
163			if (ourdisplay == NULL)
164			return;
165			if (comline != NULL) {
166			xt_close(comline);
167			comline = NULL;
168			}
169	greg	1.8	freepixels();
170			XFreeGC(ourdisplay, ourgc);
171			XDestroyWindow(ourdisplay, gwind);
172			gwind = 0;
173			ourgc = 0;
174	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
175			XCloseDisplay(ourdisplay);
176			ourdisplay = NULL;
177			}
178
179
180			static
181			x11_clear(xres, yres) /* clear our display */
182			int xres, yres;
183			{
184	greg	1.12	/* check limits */
185			if (xres < MINWIDTH)
186			xres = MINWIDTH;
187			if (yres < MINHEIGHT)
188			yres = MINHEIGHT;
189			/* resize window */
190			if (xres != gwidth \|\| yres != gheight) {
191	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
192			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
193	greg	1.1	gwidth = xres;
194			gheight = yres;
195	greg	1.8	XFlush(ourdisplay);
196			sleep(2); /* wait for window manager */
197	greg	1.4	XSync(ourdisplay, 1); /* discard input */
198			}
199	greg	1.13	XClearWindow(ourdisplay, gwind);
200			/* reinitialize color table */
201			if (ourvisual->class == PseudoColor)
202			if (getpixels() == 0)
203			stderr_v("cannot allocate colors\n");
204			else
205			new_ctab(ncolors);
206	greg	1.12	/* get new command line */
207	greg	1.13	if (comline != NULL)
208			xt_close(comline);
209	greg	1.12	comline = xt_open(ourdisplay,
210			DefaultGC(ourdisplay,ourscreen),
211			gwind, 0, gheight, gwidth, COMHEIGHT, 0, COMFN);
212			if (comline == NULL) {
213			stderr_v("Cannot open command line window\n");
214			quit(1);
215			}
216			XSelectInput(ourdisplay, comline->w, ExposureMask);
217			/* remove earmuffs */
218	greg	1.4	XSelectInput(ourdisplay, gwind,
219			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
220	greg	1.1	}
221
222
223			static
224			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
225			COLOR col;
226			int xmin, ymin, xmax, ymax;
227			{
228			extern int xnewcolr(); /* pixel assignment routine */
229	greg	1.6	extern unsigned long true_pixel();
230			unsigned long pixel;
231	greg	1.1
232	greg	1.6	if (ncolors > 0)
233			pixel = pixval[get_pixel(col, xnewcolr)];
234	greg	1.15	else if (ourvisual->class != PseudoColor)
235	greg	1.6	pixel = true_pixel(col);
236			else
237			return;
238			XSetForeground(ourdisplay, ourgc, pixel);
239			XFillRectangle(ourdisplay, gwind,
240			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
241	greg	1.5	}
242
243
244			static
245			x11_flush() /* flush output */
246			{
247	greg	1.10	XNoOp(ourdisplay);
248	greg	1.5	while (XPending(ourdisplay) > 0)
249			getevent();
250	greg	1.1	}
251
252
253			static
254	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
255			char inp, prompt;
256	greg	1.1	{
257	greg	1.14	extern int x11_getc();
258	greg	1.1
259	greg	1.3	if (prompt != NULL)
260	greg	1.4	if (fromcombuf(inp, &x11_driver))
261			return;
262			else
263			xt_puts(prompt, comline);
264	greg	1.1	xt_cursor(comline, TBLKCURS);
265			editline(inp, x11_getc, x11_comout);
266			xt_cursor(comline, TNOCURS);
267			}
268
269
270			static
271			x11_comout(out) /* output a string to command line */
272			char *out;
273			{
274	greg	1.11	if (comline == NULL)
275			return;
276			xt_puts(out, comline);
277			if (out[strlen(out)-1] == '\n')
278			XFlush(ourdisplay);
279	greg	1.1	}
280
281
282			static
283			x11_errout(msg) /* output an error message */
284			char *msg;
285			{
286	greg	1.9	stderr_v(msg); /* send to stderr also! */
287	greg	1.1	x11_comout(msg);
288			}
289
290
291			static int
292			x11_getcur(xp, yp) /* get cursor position */
293			int xp, yp;
294			{
295			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
296			GrabModeAsync, GrabModeAsync, None, pickcursor,
297			CurrentTime) != GrabSuccess)
298			sleep(2);
299
300			do
301			getevent();
302			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
303			*xp = levptr(XButtonPressedEvent)->x;
304			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
305			XUngrabPointer(ourdisplay, CurrentTime);
306			XFlush(ourdisplay); /* insure release */
307			if (c_last > c_first) /* key pressed */
308			return(x11_getc());
309			/* button pressed */
310			if (levptr(XButtonPressedEvent)->button & Button1)
311			return(MB1);
312			if (levptr(XButtonPressedEvent)->button & Button2)
313			return(MB2);
314			if (levptr(XButtonPressedEvent)->button & Button3)
315			return(MB3);
316			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
317			return(MB1);
318			return(ABORT);
319			}
320
321
322			static
323			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
324			int ndx;
325			int r, g, b;
326			{
327			XColor xcolor;
328
329			xcolor.pixel = pixval[ndx];
330			xcolor.red = r << 8;
331			xcolor.green = g << 8;
332			xcolor.blue = b << 8;
333			xcolor.flags = DoRed\|DoGreen\|DoBlue;
334
335			XStoreColor(ourdisplay, ourmap, &xcolor);
336			}
337
338
339			static int
340			getpixels() /* get the color map */
341			{
342	greg	1.16	XColor thiscolor;
343			register int i, j;
344
345	greg	1.4	if (ncolors > 0)
346	greg	1.16	goto donecolors;
347	greg	1.6	if (ourvisual == DefaultVisual(ourdisplay,ourscreen)) {
348			ourmap = DefaultColormap(ourdisplay,ourscreen);
349			goto loop;
350			}
351			newmap:
352			ourmap = XCreateColormap(ourdisplay,gwind,ourvisual,AllocNone);
353			loop:
354			for (ncolors = ourvisual->map_entries;
355			ncolors > ourvisual->map_entries/3;
356			ncolors = ncolors*.937) {
357	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
358	greg	1.1	if (pixval == NULL)
359	greg	1.6	return(ncolors = 0);
360	greg	1.1	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
361			pixval,ncolors) != 0)
362	greg	1.6	break;
363	greg	1.1	free((char *)pixval);
364	greg	1.6	pixval = NULL;
365	greg	1.1	}
366	greg	1.6	if (pixval == NULL) {
367			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
368			goto newmap; /* try it with our map */
369			else
370			return(ncolors = 0); /* failed */
371			}
372	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
373			for (i = 0; i < ncolors; i++) { /* reset black and white */
374	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
375			continue;
376			thiscolor.pixel = pixval[i];
377			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
378			XQueryColor(ourdisplay,
379			DefaultColormap(ourdisplay,ourscreen),
380			&thiscolor);
381			XStoreColor(ourdisplay, ourmap, &thiscolor);
382			for (j = i; j+1 < ncolors; j++)
383			pixval[j] = pixval[j+1];
384			ncolors--;
385			i--;
386			}
387	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
388			donecolors:
389			#ifdef DEBUG
390			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
391			thiscolor.red = thiscolor.green = thiscolor.blue = 0;
392			for (i = 0; i < ncolors; i++) {
393			thiscolor.pixel = pixval[i];
394			XStoreColor(ourdisplay, ourmap, &thiscolor);
395	greg	1.6	}
396	greg	1.16	#endif
397	greg	1.6	return(ncolors);
398	greg	1.1	}
399
400
401			static
402			freepixels() /* free our pixels */
403			{
404			if (ncolors == 0)
405			return;
406			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
407			ncolors = 0;
408	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
409	greg	1.6	XFreeColormap(ourdisplay, ourmap);
410			ourmap = 0;
411	greg	1.1	}
412
413
414	greg	1.6	static unsigned long
415			true_pixel(col) /* return true pixel value for color */
416			COLOR col;
417			{
418			unsigned long rval;
419			BYTE rgb[3];
420
421			map_color(rgb, col);
422			rval = ourvisual->red_mask*rgb[RED]/255 & ourvisual->red_mask;
423			rval \|= ourvisual->green_mask*rgb[GRN]/255 & ourvisual->green_mask;
424			rval \|= ourvisual->blue_mask*rgb[BLU]/255 & ourvisual->blue_mask;
425			return(rval);
426			}
427
428
429	greg	1.1	static int
430			x11_getc() /* get a command character */
431			{
432			while (c_last <= c_first) {
433			c_first = c_last = 0; /* reset */
434			getevent(); /* wait for key */
435			}
436			x11_driver.inpready--;
437			return(c_queue[c_first++]);
438			}
439
440
441			static
442			getevent() /* get next event */
443			{
444			XNextEvent(ourdisplay, levptr(XEvent));
445			switch (levptr(XEvent)->type) {
446	greg	1.4	case ConfigureNotify:
447			resizewindow(levptr(XConfigureEvent));
448			break;
449			case UnmapNotify:
450			freepixels();
451			break;
452			case MapNotify:
453	greg	1.6	if (ourvisual->class == PseudoColor)
454			if (getpixels() == 0)
455			stderr_v("Cannot allocate colors\n");
456			else
457			new_ctab(ncolors);
458	greg	1.4	break;
459			case Expose:
460			fixwindow(levptr(XExposeEvent));
461			break;
462	greg	1.1	case KeyPress:
463			getkey(levptr(XKeyPressedEvent));
464			break;
465			case ButtonPress:
466			break;
467			}
468			}
469
470
471			static
472			getkey(ekey) /* get input key */
473			register XKeyPressedEvent *ekey;
474			{
475	greg	1.8	register int n;
476	greg	1.7
477			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
478	greg	1.1	NULL, NULL);
479	greg	1.7	c_last += n;
480			x11_driver.inpready += n;
481	greg	1.1	}
482
483
484			static
485			fixwindow(eexp) /* repair damage to window */
486			register XExposeEvent *eexp;
487			{
488	greg	1.4	if (eexp->window == gwind) {
489			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
490			eexp->x, gheight - eexp->y - eexp->height,
491	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
492	greg	1.4	} else if (eexp->window == comline->w) {
493			if (eexp->count == 0)
494			xt_redraw(comline);
495			}
496	greg	1.1	}
497	greg	1.4
498
499			static
500			resizewindow(ersz) /* resize window */
501			register XConfigureEvent *ersz;
502			{
503			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
504			return;
505
506			gwidth = ersz->width;
507			gheight = ersz->height-COMHEIGHT;
508			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
509			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
510
511			strcpy(getcombuf(&x11_driver), "new\n");
512			}