src/rt/x10.c

/* Copyright (c) 1987 Regents of the University of California */

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

/*
 *  x10.c - driver for X-windows version 10.4
 *
 *     5/7/87
 */

#include  <stdio.h>

#include  <sys/ioctl.h>

#include  <X/Xlib.h>
#include  <X/cursors/bcross.cursor>
#include  <X/cursors/bcross_mask.cursor>

#include  "color.h"

#include  "driver.h"

#include  "xtwind.h"

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

#define BORWIDTH        5               /* border width */
#define BARHEIGHT       25              /* menu bar size */
#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           13              /* approx. character height (pixels) */

#ifndef WFLUSH
#define WFLUSH          30              /* flush after this many rays */
#endif

#define  checkinp()     while (XPending() > 0) getevent()

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

static char  *clientname;               /* calling client's name */

static XEvent  thisevent;               /* current event */

static int  ncolors = 0;                /* color table size */
static int  *pixval;                    /* allocated pixel values */

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

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

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

static int  gwidth = 0;                 /* graphics window width */
static int  gheight = 0;                /* graphics window height */

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 */

extern char  *malloc();

int  xnewcolr();

int  x_close(), x_clear(), x_paintr(), x_errout(),
                x_getcur(), x_comout(), x_comin();

static struct driver  x_driver = {
        x_close, x_clear, x_paintr, x_getcur,
        x_comout, x_comin,
        MAXRES, MAXRES
};


struct driver *
x_init(name)                    /* initialize driver */
char  *name;
{
        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL) {
                stderr_v("cannot open X-windows; DISPLAY variable set?\n");
                return(NULL);
        }
        if (DisplayPlanes() < 4) {
                stderr_v("not enough colors\n");
                return(NULL);
        }
        make_cmap(GAMMA);                       /* make color map */
        if (getpixels() < 0)                    /* get pixels */
                stderr_v("cannot allocate colors\n");

        pickcursor = XCreateCursor(bcross_width, bcross_height,
                        bcross_bits, bcross_mask_bits,
                        bcross_x_hot, bcross_y_hot,
                        BlackPixel, WhitePixel, GXcopy);
        clientname = name;
        x_driver.inpready = 0;
        cmdvec = x_comout;                      /* set error vectors */
        if (wrnvec != NULL)
                wrnvec = x_errout;
        return(&x_driver);
}


static
x_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;
        }
        if (gwind != 0) {
                XDestroyWindow(gwind);
                gwind = 0;
                gwidth = gheight = 0;
        }
        XFreeCursor(pickcursor);
        freepixels();
        XCloseDisplay(ourdisplay);
        ourdisplay = NULL;
}


static
x_clear(xres, yres)                     /* clear our display */
int  xres, yres;
{
        if (xres != gwidth || yres != gheight) {        /* new window */
                if (comline != NULL)
                        xt_close(comline);
                if (gwind != 0)
                        XDestroyWindow(gwind);
                gwind = XCreateWindow(RootWindow, 0, BARHEIGHT,
                                xres, yres+COMHEIGHT, BORWIDTH,
                                BlackPixmap, BlackPixmap);
                if (gwind == 0)
                        goto fail;
                comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
                if (comline == NULL)
                        goto fail;
                XMapWindow(gwind);
                XSelectInput(gwind,
        KeyPressed|ButtonPressed|ExposeWindow|ExposeRegion|UnmapWindow);
                XStoreName(gwind, clientname);
                gwidth = xres;
                gheight = yres;
        } else                                          /* just clear */
                XClear(gwind);
        if (new_ctab(ncolors, xnewcolr) == 0) {
                stderr_v("Color allocation error\n");
                quit(1);
        }
        checkinp();
        return;
fail:
        stderr_v("Failure opening window in x_clear\n");
        quit(1);
}


static
x_paintr(col, xmin, ymin, xmax, ymax)           /* fill a rectangle */
COLOR  col;
int  xmin, ymin, xmax, ymax;
{
        extern long  nrays;             /* global ray count */
        static long  lastflush = 0;     /* ray count at last flush */

        if (ncolors > 0) {
                XPixSet(gwind, xmin, gheight-ymax, xmax-xmin, ymax-ymin,
                                pixval[get_pixel(col)]);
        }
        if (nrays - lastflush >= WFLUSH) {
                if (ncolors <= 0)       /* output necessary for death */
                        XPixSet(gwind,0,0,1,1,BlackPixel);
                checkinp();
                lastflush = nrays;
        }
}


static
x_comin(inp)                    /* read in a command line */
char  *inp;
{
        int  x_getc(), x_comout();

        xt_cursor(comline, TBLKCURS);
        editline(inp, x_getc, x_comout);
        xt_cursor(comline, TNOCURS);
}


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


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


static int
x_getcur(xp, yp)                /* get cursor position */
int  *xp, *yp;
{
        while (XGrabMouse(gwind, pickcursor, ButtonPressed) == 0)
                sleep(1);
        XFocusKeyboard(gwind);
        do
                getevent();
        while (c_last <= c_first && levptr(XEvent)->type != ButtonPressed);
        *xp = levptr(XKeyOrButtonEvent)->x;
        *yp = gheight-1 - levptr(XKeyOrButtonEvent)->y;
        XFocusKeyboard(RootWindow);
        XUngrabMouse();
        XFlush();                               /* insure release */
        if (c_last > c_first)                   /* key pressed */
                return(x_getc());
                                                /* button pressed */
        switch (levptr(XKeyOrButtonEvent)->detail & 0377) {
        case LeftButton:
                return(MB1);
        case MiddleButton:
                return(MB2);
        case RightButton:
                return(MB3);
        }
        return(ABORT);
}


static
xnewcolr(ndx, r, g, b)          /* enter a color into hardware table */
int  ndx;
int  r, g, b;
{
        Color  xcolor;

        xcolor.pixel = pixval[ndx];
        xcolor.red = r << 8;
        xcolor.green = g << 8;
        xcolor.blue = b << 8;

        XStoreColor(&xcolor);
}


static
getpixels()                             /* get the color map */
{
        int  planes;

        for (ncolors=(1<<DisplayPlanes())-3; ncolors>12; ncolors=ncolors*.937){
                pixval = (int *)malloc(ncolors*sizeof(int));
                if (pixval == NULL)
                        break;
                if (XGetColorCells(0,ncolors,0,&planes,pixval) != 0)
                        return(0);
                free((char *)pixval);
        }
        ncolors = 0;
        return(-1);
}


static
freepixels()                            /* free our pixels */
{
        if (ncolors == 0)
                return;
        XFreeColors(pixval, ncolors, 0);
        free((char *)pixval);
        ncolors = 0;
}


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


static
getevent()                      /* get next event */
{
        XNextEvent(levptr(XEvent));
        switch (levptr(XEvent)->type) {
        case KeyPressed:
                getkey(levptr(XKeyPressedEvent));
                break;
        case ExposeWindow:
                if (levptr(XExposeEvent)->subwindow == 0) {
                        if (ncolors == 0 && getpixels() < 0) {
                                stderr_v("cannot allocate colors\n");
                                break;
                        }
                        new_ctab(ncolors, xnewcolr);
                }
                /* fall through */
        case ExposeRegion:
                fixwindow(levptr(XExposeEvent));
                break;
        case UnmapWindow:
                if (levptr(XUnmapEvent)->subwindow == 0)
                        freepixels();
                break;
        case ButtonPressed:             /* handled in x_getcur() */
                break;
        }
}


static
getkey(ekey)                            /* get input key */
register XKeyPressedEvent  *ekey;
{
        int  n;
        register char  *str;

        str = XLookupMapping(ekey, &n);
        while (n-- > 0 && c_last < sizeof(c_queue))
                c_queue[c_last++] = *str++;
        x_driver.inpready = c_last - c_first;
}


static
fixwindow(eexp)                         /* repair damage to window */
register XExposeEvent  *eexp;
{
        if (eexp->subwindow == 0)
                repaint(eexp->x, gheight - eexp->y - eexp->height,
                        eexp->x + eexp->width, gheight - eexp->y);
        else if (eexp->subwindow == comline->w)
                xt_redraw(comline);
}
Revision:	1.13
Committed:	Tue Oct 3 13:02:57 1989 UTC (35 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+15 -35 lines
Log Message:	Improved color table allocation, second cut.
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1987 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* x10.c - driver for X-windows version 10.4
9			*
10			* 5/7/87
11			*/
12
13			#include <stdio.h>
14
15			#include <sys/ioctl.h>
16
17			#include <X/Xlib.h>
18			#include <X/cursors/bcross.cursor>
19			#include <X/cursors/bcross_mask.cursor>
20
21			#include "color.h"
22
23			#include "driver.h"
24
25			#include "xtwind.h"
26
27	greg	1.12	#define GAMMA 2.2 /* exponent for color correction */
28	greg	1.1
29			#define BORWIDTH 5 /* border width */
30			#define BARHEIGHT 25 /* menu bar size */
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 13 /* approx. character height (pixels) */
37
38			#ifndef WFLUSH
39	greg	1.10	#define WFLUSH 30 /* flush after this many rays */
40	greg	1.1	#endif
41
42	greg	1.8	#define checkinp() while (XPending() > 0) getevent()
43	greg	1.1
44			#define levptr(etype) ((etype *)&thisevent)
45
46			static char clientname; / calling client's name */
47
48			static XEvent thisevent; /* current event */
49
50			static int ncolors = 0; /* color table size */
51	greg	1.12	static int pixval; / allocated pixel values */
52	greg	1.1
53			static Display ourdisplay = NULL; / our display */
54
55			static Window gwind = 0; /* our graphics window */
56
57			static Cursor pickcursor = 0; /* cursor used for picking */
58
59			static int gwidth = 0; /* graphics window width */
60			static int gheight = 0; /* graphics window height */
61
62			static TEXTWIND comline = NULL; / our command line */
63
64			static char c_queue[64]; /* input queue */
65			static int c_first = 0; /* first character in queue */
66			static int c_last = 0; /* last character in queue */
67
68			extern char *malloc();
69
70	greg	1.13	int xnewcolr();
71
72	greg	1.1	int x_close(), x_clear(), x_paintr(), x_errout(),
73			x_getcur(), x_comout(), x_comin();
74
75			static struct driver x_driver = {
76			x_close, x_clear, x_paintr, x_getcur,
77			x_comout, x_comin,
78			MAXRES, MAXRES
79			};
80
81
82			struct driver *
83			x_init(name) /* initialize driver */
84			char *name;
85			{
86			ourdisplay = XOpenDisplay(NULL);
87			if (ourdisplay == NULL) {
88	greg	1.2	stderr_v("cannot open X-windows; DISPLAY variable set?\n");
89	greg	1.1	return(NULL);
90			}
91			if (DisplayPlanes() < 4) {
92			stderr_v("not enough colors\n");
93			return(NULL);
94			}
95	greg	1.12	make_cmap(GAMMA); /* make color map */
96			if (getpixels() < 0) /* get pixels */
97	greg	1.1	stderr_v("cannot allocate colors\n");
98
99			pickcursor = XCreateCursor(bcross_width, bcross_height,
100			bcross_bits, bcross_mask_bits,
101			bcross_x_hot, bcross_y_hot,
102			BlackPixel, WhitePixel, GXcopy);
103			clientname = name;
104			x_driver.inpready = 0;
105	greg	1.5	cmdvec = x_comout; /* set error vectors */
106	greg	1.1	if (wrnvec != NULL)
107			wrnvec = x_errout;
108			return(&x_driver);
109			}
110
111
112			static
113			x_close() /* close our display */
114			{
115	greg	1.5	cmdvec = NULL; /* reset error vectors */
116	greg	1.1	if (wrnvec != NULL)
117			wrnvec = stderr_v;
118			if (ourdisplay == NULL)
119			return;
120			if (comline != NULL) {
121			xt_close(comline);
122			comline = NULL;
123			}
124			if (gwind != 0) {
125			XDestroyWindow(gwind);
126			gwind = 0;
127			gwidth = gheight = 0;
128			}
129			XFreeCursor(pickcursor);
130	greg	1.12	freepixels();
131	greg	1.1	XCloseDisplay(ourdisplay);
132			ourdisplay = NULL;
133			}
134
135
136			static
137			x_clear(xres, yres) /* clear our display */
138			int xres, yres;
139			{
140			if (xres != gwidth \|\| yres != gheight) { /* new window */
141			if (comline != NULL)
142			xt_close(comline);
143			if (gwind != 0)
144			XDestroyWindow(gwind);
145			gwind = XCreateWindow(RootWindow, 0, BARHEIGHT,
146			xres, yres+COMHEIGHT, BORWIDTH,
147			BlackPixmap, BlackPixmap);
148			if (gwind == 0)
149			goto fail;
150			comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
151			if (comline == NULL)
152			goto fail;
153			XMapWindow(gwind);
154			XSelectInput(gwind,
155			KeyPressed\|ButtonPressed\|ExposeWindow\|ExposeRegion\|UnmapWindow);
156			XStoreName(gwind, clientname);
157			gwidth = xres;
158			gheight = yres;
159			} else /* just clear */
160			XClear(gwind);
161	greg	1.13	if (new_ctab(ncolors, xnewcolr) == 0) {
162	greg	1.12	stderr_v("Color allocation error\n");
163			quit(1);
164			}
165	greg	1.8	checkinp();
166	greg	1.1	return;
167			fail:
168			stderr_v("Failure opening window in x_clear\n");
169			quit(1);
170			}
171
172
173			static
174			x_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
175			COLOR col;
176			int xmin, ymin, xmax, ymax;
177			{
178			extern long nrays; /* global ray count */
179			static long lastflush = 0; /* ray count at last flush */
180
181			if (ncolors > 0) {
182			XPixSet(gwind, xmin, gheight-ymax, xmax-xmin, ymax-ymin,
183	greg	1.12	pixval[get_pixel(col)]);
184	greg	1.1	}
185			if (nrays - lastflush >= WFLUSH) {
186	greg	1.9	if (ncolors <= 0) /* output necessary for death */
187			XPixSet(gwind,0,0,1,1,BlackPixel);
188	greg	1.8	checkinp();
189	greg	1.1	lastflush = nrays;
190			}
191			}
192
193
194			static
195			x_comin(inp) /* read in a command line */
196			char *inp;
197			{
198			int x_getc(), x_comout();
199
200			xt_cursor(comline, TBLKCURS);
201	greg	1.11	editline(inp, x_getc, x_comout);
202	greg	1.1	xt_cursor(comline, TNOCURS);
203			}
204
205
206			static
207			x_comout(out) /* output a string to command line */
208			char *out;
209			{
210			if (comline != NULL)
211			xt_puts(out, comline);
212	greg	1.8	XFlush();
213	greg	1.1	}
214
215
216			static
217			x_errout(msg) /* output an error message */
218			char *msg;
219			{
220			x_comout(msg);
221			stderr_v(msg); /* send to stderr also! */
222			}
223
224
225			static int
226			x_getcur(xp, yp) /* get cursor position */
227			int xp, yp;
228			{
229			while (XGrabMouse(gwind, pickcursor, ButtonPressed) == 0)
230			sleep(1);
231			XFocusKeyboard(gwind);
232			do
233			getevent();
234			while (c_last <= c_first && levptr(XEvent)->type != ButtonPressed);
235			*xp = levptr(XKeyOrButtonEvent)->x;
236			*yp = gheight-1 - levptr(XKeyOrButtonEvent)->y;
237			XFocusKeyboard(RootWindow);
238			XUngrabMouse();
239	greg	1.8	XFlush(); /* insure release */
240	greg	1.1	if (c_last > c_first) /* key pressed */
241			return(x_getc());
242			/* button pressed */
243			switch (levptr(XKeyOrButtonEvent)->detail & 0377) {
244			case LeftButton:
245			return(MB1);
246			case MiddleButton:
247			return(MB2);
248			case RightButton:
249			return(MB3);
250			}
251			return(ABORT);
252			}
253
254
255			static
256	greg	1.13	xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
257	greg	1.1	int ndx;
258	greg	1.13	int r, g, b;
259	greg	1.1	{
260			Color xcolor;
261
262			xcolor.pixel = pixval[ndx];
263	greg	1.13	xcolor.red = r << 8;
264			xcolor.green = g << 8;
265			xcolor.blue = b << 8;
266	greg	1.1
267			XStoreColor(&xcolor);
268			}
269
270
271			static
272	greg	1.12	getpixels() /* get the color map */
273	greg	1.1	{
274			int planes;
275
276			for (ncolors=(1<<DisplayPlanes())-3; ncolors>12; ncolors=ncolors*.937){
277			pixval = (int )malloc(ncolorssizeof(int));
278	greg	1.12	if (pixval == NULL)
279			break;
280	greg	1.1	if (XGetColorCells(0,ncolors,0,&planes,pixval) != 0)
281			return(0);
282			free((char *)pixval);
283			}
284			ncolors = 0;
285			return(-1);
286			}
287
288
289			static
290	greg	1.12	freepixels() /* free our pixels */
291	greg	1.1	{
292			if (ncolors == 0)
293			return;
294			XFreeColors(pixval, ncolors, 0);
295			free((char *)pixval);
296			ncolors = 0;
297			}
298
299
300			static int
301			x_getc() /* get a command character */
302			{
303			while (c_last <= c_first) {
304			c_first = c_last = 0; /* reset */
305			getevent(); /* wait for key */
306			}
307			x_driver.inpready--;
308			return(c_queue[c_first++]);
309			}
310
311
312			static
313			getevent() /* get next event */
314			{
315			XNextEvent(levptr(XEvent));
316			switch (levptr(XEvent)->type) {
317			case KeyPressed:
318			getkey(levptr(XKeyPressedEvent));
319			break;
320			case ExposeWindow:
321	greg	1.13	if (levptr(XExposeEvent)->subwindow == 0) {
322			if (ncolors == 0 && getpixels() < 0) {
323			stderr_v("cannot allocate colors\n");
324			break;
325			}
326			new_ctab(ncolors, xnewcolr);
327			}
328	greg	1.1	/* fall through */
329			case ExposeRegion:
330			fixwindow(levptr(XExposeEvent));
331			break;
332			case UnmapWindow:
333			if (levptr(XUnmapEvent)->subwindow == 0)
334	greg	1.12	freepixels();
335	greg	1.1	break;
336			case ButtonPressed: /* handled in x_getcur() */
337			break;
338			}
339			}
340
341
342			static
343			getkey(ekey) /* get input key */
344			register XKeyPressedEvent *ekey;
345			{
346			int n;
347			register char *str;
348
349			str = XLookupMapping(ekey, &n);
350			while (n-- > 0 && c_last < sizeof(c_queue))
351			c_queue[c_last++] = *str++;
352			x_driver.inpready = c_last - c_first;
353			}
354
355
356			static
357			fixwindow(eexp) /* repair damage to window */
358			register XExposeEvent *eexp;
359			{
360			if (eexp->subwindow == 0)
361			repaint(eexp->x, gheight - eexp->y - eexp->height,
362			eexp->x + eexp->width, gheight - eexp->y);
363			else if (eexp->subwindow == comline->w)
364			xt_redraw(comline);
365			}