src/rt/x11.c

/* Copyright (c) 1992 Regents of the University of California */

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

/*
 *  x11.c - driver for X-windows version 11
 *
 *     Jan 1990
 */

#include  <stdio.h>

#include  <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  levptr(etype)  ((etype *)&currentevent)

static XEvent  currentevent;            /* current event */

static int  ncolors = 0;                /* color table size */
static unsigned long  *pixval = NULL;   /* allocated pixels */
static unsigned long  ourblack=0, ourwhite=1;

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

static XVisualInfo  ourvinfo;           /* our visual information */

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

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

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

static 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;
        XSetWindowAttributes    ourwinattr;
        XWMHints  ourxwmhints;
        XSizeHints      oursizhints;

        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL) {
                stderr_v("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
                                        /* find a usable visual */
        nplanes = DisplayPlanes(ourdisplay, ourscreen);
        if (XMatchVisualInfo(ourdisplay,ourscreen,
                                24,TrueColor,&ourvinfo) ||
                        XMatchVisualInfo(ourdisplay,ourscreen,
                                24,DirectColor,&ourvinfo)) {
                ourblack = 0;
                ourwhite = ourvinfo.red_mask |
                                ourvinfo.green_mask |
                                ourvinfo.blue_mask ;
        } else {
                if (nplanes < 4) {
                        stderr_v("not enough colors\n");
                        return(NULL);
                }
                if (!XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,PseudoColor,&ourvinfo) &&
                                !XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,GrayScale,&ourvinfo)) {
                        stderr_v("unsupported visual type\n");
                        return(NULL);
                }
                ourblack = BlackPixel(ourdisplay,ourscreen);
                ourwhite = WhitePixel(ourdisplay,ourscreen);
        }
        make_gmap(GAMMA);
        /* open window */
        ourwinattr.background_pixel = ourblack;
        ourwinattr.border_pixel = ourblack;
                                        /* this is stupid */
        ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
                                ourvinfo.visual, AllocNone);
        gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
                DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
                DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
                BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
                CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr);
        if (gwind == 0) {
                stderr_v("cannot create window\n");
                return(NULL);
        }
        XFreeColormap(ourdisplay, ourwinattr.colormap);
        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 (ourvinfo.class == PseudoColor || ourvinfo.class == GrayScale)
                if (getpixels() == 0)
                        stderr_v("cannot allocate colors\n");
                else
                        new_ctab(ncolors);
                                                /* get new command line */
        if (comline != NULL)
                xt_close(comline);
        comline = xt_open(ourdisplay, gwind, 0, gheight,
                        gwidth, COMHEIGHT, 0, ourblack, ourwhite, COMFN);
        if (comline == NULL) {
                stderr_v("Cannot open command line window\n");
                quit(1);
        }
        XSelectInput(ourdisplay, comline->w, ExposureMask);
                                                /* remove earmuffs */
        XSelectInput(ourdisplay, gwind,
                StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
}


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 (ourvinfo.class == TrueColor || ourvinfo.class == DirectColor)
                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)
                return(ncolors);
        if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
                ourmap = DefaultColormap(ourdisplay,ourscreen);
                goto loop;
        }
newmap:
        ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
loop:
        for (ncolors = ourvinfo.colormap_size;
                        ncolors > ourvinfo.colormap_size/3;
                        ncolors = ncolors*.937) {
                pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
                if (pixval == NULL)
                        return(ncolors = 0);
                if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
                                pixval,ncolors) != 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);
        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 = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
        rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
        rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
        return(rval);
}


static int
x11_getc()                      /* get a command character */
{
        while (c_last <= c_first) {
                c_first = c_last = 0;           /* reset */
                getevent();                     /* wait for key */
        }
        x11_driver.inpready--;
        return(c_queue[c_first++]);
}


static
getevent()                      /* get next event */
{
        XNextEvent(ourdisplay, levptr(XEvent));
        switch (levptr(XEvent)->type) {
        case ConfigureNotify:
                resizewindow(levptr(XConfigureEvent));
                break;
        case UnmapNotify:
                freepixels();
                break;
        case MapNotify:
                if (ourvinfo.class == PseudoColor ||
                                ourvinfo.class == GrayScale)
                        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:	2.4
Committed:	Sat May 30 09:32:18 1992 UTC (32 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+17 -13 lines
Log Message:	small modification to white/black assignment in 24-bit mode
#	User	Rev	Content
1	greg	2.4	/* Copyright (c) 1992 Regents of the University of California */
2
3	greg	1.1	#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8	greg	2.4	* x11.c - driver for X-windows version 11
9	greg	1.1	*
10	greg	1.4	* Jan 1990
11	greg	1.1	*/
12
13			#include <stdio.h>
14
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
42			#define levptr(etype) ((etype *)&currentevent)
43	greg	1.1
44	greg	1.4	static XEvent currentevent; /* current event */
45	greg	1.1
46			static int ncolors = 0; /* color table size */
47	greg	1.17	static unsigned long pixval = NULL; / allocated pixels */
48	greg	2.3	static unsigned long ourblack=0, ourwhite=1;
49	greg	1.1
50			static Display ourdisplay = NULL; / our display */
51
52	greg	2.2	static XVisualInfo ourvinfo; /* our visual information */
53	greg	1.6
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	greg	1.14	extern char malloc(), getcombuf();
71	greg	1.1
72	greg	1.14	static 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	greg	1.10	XSetWindowAttributes ourwinattr;
87	greg	1.4	XWMHints ourxwmhints;
88	greg	1.12	XSizeHints oursizhints;
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	2.2	/* find a usable visual */
96	greg	1.6	nplanes = DisplayPlanes(ourdisplay, ourscreen);
97	greg	2.4	if (XMatchVisualInfo(ourdisplay,ourscreen,
98			24,TrueColor,&ourvinfo) \|\|
99			XMatchVisualInfo(ourdisplay,ourscreen,
100			24,DirectColor,&ourvinfo)) {
101			ourblack = 0;
102			ourwhite = ourvinfo.red_mask \|
103			ourvinfo.green_mask \|
104			ourvinfo.blue_mask ;
105			} else {
106	greg	2.2	if (nplanes < 4) {
107			stderr_v("not enough colors\n");
108	greg	1.6	return(NULL);
109	greg	2.4	}
110			if (!XMatchVisualInfo(ourdisplay,ourscreen,
111	greg	2.2	nplanes,PseudoColor,&ourvinfo) &&
112			!XMatchVisualInfo(ourdisplay,ourscreen,
113			nplanes,GrayScale,&ourvinfo)) {
114			stderr_v("unsupported visual type\n");
115			return(NULL);
116	greg	1.6	}
117	greg	2.3	ourblack = BlackPixel(ourdisplay,ourscreen);
118			ourwhite = WhitePixel(ourdisplay,ourscreen);
119			}
120	greg	1.6	make_gmap(GAMMA);
121	greg	1.4	/* open window */
122	greg	1.12	ourwinattr.background_pixel = ourblack;
123	greg	1.10	ourwinattr.border_pixel = ourblack;
124	greg	2.4	/* this is stupid */
125	greg	2.2	ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
126			ourvinfo.visual, AllocNone);
127	greg	1.10	gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
128	greg	1.4	DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
129			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
130	greg	2.2	BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
131			CWBackPixel\|CWBorderPixel\|CWColormap, &ourwinattr);
132	greg	1.4	if (gwind == 0) {
133			stderr_v("cannot create window\n");
134			return(NULL);
135			}
136	greg	2.4	XFreeColormap(ourdisplay, ourwinattr.colormap);
137			XStoreName(ourdisplay, gwind, id);
138	greg	1.10	/* create a cursor */
139			pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
140	greg	1.4	ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
141	greg	1.18	ourxwmhints.flags = InputHint\|IconPixmapHint;
142	greg	1.4	ourxwmhints.input = True;
143	greg	1.18	ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
144			gwind, x11icon_bits, x11icon_width, x11icon_height);
145	greg	1.4	XSetWMHints(ourdisplay, gwind, &ourxwmhints);
146	greg	1.12	oursizhints.min_width = MINWIDTH;
147			oursizhints.min_height = MINHEIGHT+COMHEIGHT;
148			oursizhints.flags = PMinSize;
149			XSetNormalHints(ourdisplay, gwind, &oursizhints);
150	greg	1.4	XSelectInput(ourdisplay, gwind, ExposureMask);
151			XMapWindow(ourdisplay, gwind);
152	greg	1.17	XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
153	greg	1.4	gwidth = levptr(XExposeEvent)->width;
154			gheight = levptr(XExposeEvent)->height - COMHEIGHT;
155			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
156			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
157	greg	1.1	x11_driver.inpready = 0;
158			cmdvec = x11_comout; /* set error vectors */
159			if (wrnvec != NULL)
160			wrnvec = x11_errout;
161			return(&x11_driver);
162			}
163
164
165			static
166			x11_close() /* close our display */
167			{
168			cmdvec = NULL; /* reset error vectors */
169			if (wrnvec != NULL)
170			wrnvec = stderr_v;
171			if (ourdisplay == NULL)
172			return;
173			if (comline != NULL) {
174			xt_close(comline);
175			comline = NULL;
176			}
177	greg	1.8	freepixels();
178			XFreeGC(ourdisplay, ourgc);
179			XDestroyWindow(ourdisplay, gwind);
180			gwind = 0;
181			ourgc = 0;
182	greg	1.1	XFreeCursor(ourdisplay, pickcursor);
183			XCloseDisplay(ourdisplay);
184			ourdisplay = NULL;
185			}
186
187
188			static
189			x11_clear(xres, yres) /* clear our display */
190			int xres, yres;
191			{
192	greg	1.12	/* check limits */
193			if (xres < MINWIDTH)
194			xres = MINWIDTH;
195			if (yres < MINHEIGHT)
196			yres = MINHEIGHT;
197			/* resize window */
198			if (xres != gwidth \|\| yres != gheight) {
199	greg	1.4	XSelectInput(ourdisplay, gwind, 0);
200			XResizeWindow(ourdisplay, gwind, xres, yres+COMHEIGHT);
201	greg	1.1	gwidth = xres;
202			gheight = yres;
203	greg	1.8	XFlush(ourdisplay);
204			sleep(2); /* wait for window manager */
205	greg	1.4	XSync(ourdisplay, 1); /* discard input */
206			}
207	greg	1.13	XClearWindow(ourdisplay, gwind);
208			/* reinitialize color table */
209	greg	2.2	if (ourvinfo.class == PseudoColor \|\| ourvinfo.class == GrayScale)
210	greg	1.13	if (getpixels() == 0)
211			stderr_v("cannot allocate colors\n");
212			else
213			new_ctab(ncolors);
214	greg	1.12	/* get new command line */
215	greg	1.13	if (comline != NULL)
216			xt_close(comline);
217	greg	2.3	comline = xt_open(ourdisplay, gwind, 0, gheight,
218			gwidth, COMHEIGHT, 0, ourblack, ourwhite, COMFN);
219	greg	1.12	if (comline == NULL) {
220			stderr_v("Cannot open command line window\n");
221			quit(1);
222			}
223			XSelectInput(ourdisplay, comline->w, ExposureMask);
224			/* remove earmuffs */
225	greg	1.4	XSelectInput(ourdisplay, gwind,
226			StructureNotifyMask\|ExposureMask\|KeyPressMask\|ButtonPressMask);
227	greg	1.1	}
228
229
230			static
231			x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
232			COLOR col;
233			int xmin, ymin, xmax, ymax;
234			{
235			extern int xnewcolr(); /* pixel assignment routine */
236	greg	1.6	extern unsigned long true_pixel();
237			unsigned long pixel;
238	greg	1.1
239	greg	1.6	if (ncolors > 0)
240			pixel = pixval[get_pixel(col, xnewcolr)];
241	greg	2.2	else if (ourvinfo.class == TrueColor \|\| ourvinfo.class == DirectColor)
242	greg	1.6	pixel = true_pixel(col);
243			else
244			return;
245			XSetForeground(ourdisplay, ourgc, pixel);
246			XFillRectangle(ourdisplay, gwind,
247			ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
248	greg	1.5	}
249
250
251			static
252			x11_flush() /* flush output */
253			{
254	greg	1.10	XNoOp(ourdisplay);
255	greg	1.5	while (XPending(ourdisplay) > 0)
256			getevent();
257	greg	1.1	}
258
259
260			static
261	greg	1.3	x11_comin(inp, prompt) /* read in a command line */
262			char inp, prompt;
263	greg	1.1	{
264	greg	1.14	extern int x11_getc();
265	greg	1.1
266	greg	1.3	if (prompt != NULL)
267	greg	1.4	if (fromcombuf(inp, &x11_driver))
268			return;
269			else
270			xt_puts(prompt, comline);
271	greg	1.1	xt_cursor(comline, TBLKCURS);
272			editline(inp, x11_getc, x11_comout);
273			xt_cursor(comline, TNOCURS);
274			}
275
276
277			static
278			x11_comout(out) /* output a string to command line */
279			char *out;
280			{
281	greg	1.11	if (comline == NULL)
282			return;
283			xt_puts(out, comline);
284			if (out[strlen(out)-1] == '\n')
285			XFlush(ourdisplay);
286	greg	1.1	}
287
288
289			static
290			x11_errout(msg) /* output an error message */
291			char *msg;
292			{
293	greg	1.9	stderr_v(msg); /* send to stderr also! */
294	greg	1.1	x11_comout(msg);
295			}
296
297
298			static int
299			x11_getcur(xp, yp) /* get cursor position */
300			int xp, yp;
301			{
302			while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
303			GrabModeAsync, GrabModeAsync, None, pickcursor,
304			CurrentTime) != GrabSuccess)
305			sleep(2);
306
307			do
308			getevent();
309			while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
310			*xp = levptr(XButtonPressedEvent)->x;
311			*yp = gheight-1 - levptr(XButtonPressedEvent)->y;
312			XUngrabPointer(ourdisplay, CurrentTime);
313			XFlush(ourdisplay); /* insure release */
314			if (c_last > c_first) /* key pressed */
315			return(x11_getc());
316			/* button pressed */
317			if (levptr(XButtonPressedEvent)->button & Button1)
318			return(MB1);
319			if (levptr(XButtonPressedEvent)->button & Button2)
320			return(MB2);
321			if (levptr(XButtonPressedEvent)->button & Button3)
322			return(MB3);
323			if (levptr(XButtonPressedEvent)->button & (Button4\|Button5))
324			return(MB1);
325			return(ABORT);
326			}
327
328
329			static
330			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
331			int ndx;
332			int r, g, b;
333			{
334			XColor xcolor;
335
336			xcolor.pixel = pixval[ndx];
337			xcolor.red = r << 8;
338			xcolor.green = g << 8;
339			xcolor.blue = b << 8;
340			xcolor.flags = DoRed\|DoGreen\|DoBlue;
341
342			XStoreColor(ourdisplay, ourmap, &xcolor);
343			}
344
345
346			static int
347			getpixels() /* get the color map */
348			{
349	greg	1.16	XColor thiscolor;
350			register int i, j;
351
352	greg	1.4	if (ncolors > 0)
353	greg	2.2	return(ncolors);
354			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
355	greg	1.6	ourmap = DefaultColormap(ourdisplay,ourscreen);
356			goto loop;
357			}
358			newmap:
359	greg	2.2	ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
360	greg	1.6	loop:
361	greg	2.2	for (ncolors = ourvinfo.colormap_size;
362			ncolors > ourvinfo.colormap_size/3;
363	greg	1.6	ncolors = ncolors*.937) {
364	greg	1.17	pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
365	greg	1.1	if (pixval == NULL)
366	greg	1.6	return(ncolors = 0);
367	greg	1.1	if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,
368			pixval,ncolors) != 0)
369	greg	1.6	break;
370	greg	1.1	free((char *)pixval);
371	greg	1.6	pixval = NULL;
372	greg	1.1	}
373	greg	1.6	if (pixval == NULL) {
374			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
375			goto newmap; /* try it with our map */
376			else
377			return(ncolors = 0); /* failed */
378			}
379	greg	1.16	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
380			for (i = 0; i < ncolors; i++) { /* reset black and white */
381	greg	1.6	if (pixval[i] != ourblack && pixval[i] != ourwhite)
382			continue;
383			thiscolor.pixel = pixval[i];
384			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
385			XQueryColor(ourdisplay,
386			DefaultColormap(ourdisplay,ourscreen),
387			&thiscolor);
388			XStoreColor(ourdisplay, ourmap, &thiscolor);
389			for (j = i; j+1 < ncolors; j++)
390			pixval[j] = pixval[j+1];
391			ncolors--;
392			i--;
393			}
394	greg	1.16	XSetWindowColormap(ourdisplay, gwind, ourmap);
395	greg	1.6	return(ncolors);
396	greg	1.1	}
397
398
399			static
400			freepixels() /* free our pixels */
401			{
402			if (ncolors == 0)
403			return;
404			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
405			ncolors = 0;
406	greg	1.8	if (ourmap != DefaultColormap(ourdisplay,ourscreen))
407	greg	1.6	XFreeColormap(ourdisplay, ourmap);
408			ourmap = 0;
409	greg	1.1	}
410
411
412	greg	1.6	static unsigned long
413			true_pixel(col) /* return true pixel value for color */
414			COLOR col;
415			{
416			unsigned long rval;
417			BYTE rgb[3];
418
419			map_color(rgb, col);
420	greg	2.2	rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
421			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
422			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
423	greg	1.6	return(rval);
424			}
425
426
427	greg	1.1	static int
428			x11_getc() /* get a command character */
429			{
430			while (c_last <= c_first) {
431			c_first = c_last = 0; /* reset */
432			getevent(); /* wait for key */
433			}
434			x11_driver.inpready--;
435			return(c_queue[c_first++]);
436			}
437
438
439			static
440			getevent() /* get next event */
441			{
442			XNextEvent(ourdisplay, levptr(XEvent));
443			switch (levptr(XEvent)->type) {
444	greg	1.4	case ConfigureNotify:
445			resizewindow(levptr(XConfigureEvent));
446			break;
447			case UnmapNotify:
448			freepixels();
449			break;
450			case MapNotify:
451	greg	2.2	if (ourvinfo.class == PseudoColor \|\|
452			ourvinfo.class == GrayScale)
453	greg	1.6	if (getpixels() == 0)
454			stderr_v("Cannot allocate colors\n");
455			else
456			new_ctab(ncolors);
457	greg	1.4	break;
458			case Expose:
459			fixwindow(levptr(XExposeEvent));
460			break;
461	greg	1.1	case KeyPress:
462			getkey(levptr(XKeyPressedEvent));
463			break;
464			case ButtonPress:
465			break;
466			}
467			}
468
469
470			static
471			getkey(ekey) /* get input key */
472			register XKeyPressedEvent *ekey;
473			{
474	greg	1.8	register int n;
475	greg	1.7
476			n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
477	greg	1.1	NULL, NULL);
478	greg	1.7	c_last += n;
479			x11_driver.inpready += n;
480	greg	1.1	}
481
482
483			static
484			fixwindow(eexp) /* repair damage to window */
485			register XExposeEvent *eexp;
486			{
487	greg	1.4	if (eexp->window == gwind) {
488			sprintf(getcombuf(&x11_driver), "repaint %d %d %d %d\n",
489			eexp->x, gheight - eexp->y - eexp->height,
490	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
491	greg	1.4	} else if (eexp->window == comline->w) {
492			if (eexp->count == 0)
493			xt_redraw(comline);
494			}
495	greg	1.1	}
496	greg	1.4
497
498			static
499			resizewindow(ersz) /* resize window */
500			register XConfigureEvent *ersz;
501			{
502			if (ersz->width == gwidth && ersz->height-COMHEIGHT == gheight)
503			return;
504
505			gwidth = ersz->width;
506			gheight = ersz->height-COMHEIGHT;
507			x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
508			x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
509
510			strcpy(getcombuf(&x11_driver), "new\n");
511			}