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 COMHEIGHT       (COMLH*COMCH)   /* command line height (pixels) */
#define MINWIDTH        (32*COMCW)      /* minimum graphics window width */
#define MINHEIGHT       64              /* minimum graphics window height */

#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(), *getcombuf();

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, 1.0
};


struct driver *
x_init(name, id)                /* initialize driver */
char  *name, *id;
{
        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_gmap(GAMMA);                       /* make color map */

        pickcursor = XCreateCursor(bcross_width, bcross_height,
                        bcross_bits, bcross_mask_bits,
                        bcross_x_hot, bcross_y_hot,
                        BlackPixel, WhitePixel, GXcopy);
        clientname = id;
        x_driver.xsiz = DisplayWidth()-(2*BORWIDTH);
        x_driver.ysiz = DisplayHeight()-(COMHEIGHT+2*BORWIDTH);
        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 < MINWIDTH)
                xres = MINWIDTH;
        if (yres < MINHEIGHT)
                yres = MINHEIGHT;
        if (xres != gwidth || yres != gheight) {        /* new window */
                if (comline != NULL)
                        xt_close(comline);
                if (gwind == 0) {
                        gwind = XCreateWindow(RootWindow, 0, 0,
                                        xres, yres+COMHEIGHT, BORWIDTH,
                                        BlackPixmap, BlackPixmap);
                        if (gwind == 0)
                                goto fail;
                        XStoreName(gwind, clientname);
                        XSelectInput(gwind, KeyPressed|ButtonPressed|
                                        ExposeWindow|ExposeRegion|UnmapWindow);
                        XMapWindow(gwind);
                } else
                        XChangeWindow(gwind, xres, yres+COMHEIGHT);
                comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
                if (comline == NULL)
                        goto fail;
                gwidth = xres;
                gheight = yres;
        } else                                          /* just clear */
                XClear(gwind);
                                                /* reinitialize color table */
        if (ncolors == 0 && getpixels() == 0)
                stderr_v("cannot allocate colors\n");
        else
                new_ctab(ncolors);
        XSync(1);                               /* discard input */
        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 */
        extern int  xnewcolr();         /* pixel assignment routine */
        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, xnewcolr)]);
        }
        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();

        if (fromcombuf(inp, &x_driver))
                return;
        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 int
getpixels()                             /* get the color map */
{
        int  planes;

        freepixels();
        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(ncolors);
                free((char *)pixval);
        }
        return(ncolors = 0);
}


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:
                windowchange(levptr(XExposeEvent));
                break;
        case ExposeRegion:
                fixwindow(levptr(XExposeEvent));
                break;
        case UnmapWindow:
                if (levptr(XUnmapEvent)->subwindow == 0)
                        freepixels();
                break;
        case ButtonPressed:             /* handled in x_getcur() */
                break;
        }
}


static
windowchange(eexp)                      /* process window change event */
register XExposeEvent  *eexp;
{
        if (eexp->subwindow != 0) {
                fixwindow(eexp);
                return;
        }
                                        /* check for change in size */
        if (eexp->width != gwidth || eexp->height != gheight+COMHEIGHT) {
                x_driver.xsiz = eexp->width;
                x_driver.ysiz = eexp->height;
                strcpy(getcombuf(&x_driver), "new\n");
                return;
        }
                                        /* remap colors */
        if (ncolors == 0 && getpixels() == 0) {
                stderr_v("cannot allocate colors\n");
                return;
        }
        new_ctab(ncolors);
                                        /* redraw */
        fixwindow(eexp);
}


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)
                sprintf(getcombuf(&x_driver), "repaint %d %d %d %d\n",
                        eexp->x, gheight - eexp->y - eexp->height,
                        eexp->x + eexp->width, gheight - eexp->y);
        else if (eexp->subwindow == comline->w)
                xt_redraw(comline);
}
Revision:	1.18
Committed:	Mon Jan 8 13:38:41 1990 UTC (35 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.17:	+43 -14 lines
Log Message:	Changed handling of view parameters
#	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 COMHEIGHT (COMLHCOMCH) / command line height (pixels) */
31	greg	1.18	#define MINWIDTH (32COMCW) / minimum graphics window width */
32			#define MINHEIGHT 64 /* minimum graphics window height */
33	greg	1.1
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 13 /* approx. character height (pixels) */
38
39			#ifndef WFLUSH
40	greg	1.10	#define WFLUSH 30 /* flush after this many rays */
41	greg	1.1	#endif
42
43	greg	1.8	#define checkinp() while (XPending() > 0) getevent()
44	greg	1.1
45			#define levptr(etype) ((etype *)&thisevent)
46
47			static char clientname; / calling client's name */
48
49			static XEvent thisevent; /* current event */
50
51			static int ncolors = 0; /* color table size */
52	greg	1.12	static int pixval; / allocated pixel values */
53	greg	1.1
54			static Display ourdisplay = NULL; / our display */
55
56			static Window gwind = 0; /* our graphics window */
57
58			static Cursor pickcursor = 0; /* cursor used for picking */
59
60			static int gwidth = 0; /* graphics window width */
61			static int gheight = 0; /* graphics window height */
62
63			static TEXTWIND comline = NULL; / our command line */
64
65			static char c_queue[64]; /* input queue */
66			static int c_first = 0; /* first character in queue */
67			static int c_last = 0; /* last character in queue */
68
69	greg	1.18	extern char malloc(), getcombuf();
70	greg	1.1
71			int x_close(), x_clear(), x_paintr(), x_errout(),
72			x_getcur(), x_comout(), x_comin();
73
74			static struct driver x_driver = {
75			x_close, x_clear, x_paintr, x_getcur,
76	greg	1.18	x_comout, x_comin, 1.0
77	greg	1.1	};
78
79
80			struct driver *
81	greg	1.16	x_init(name, id) /* initialize driver */
82			char name, id;
83	greg	1.1	{
84			ourdisplay = XOpenDisplay(NULL);
85			if (ourdisplay == NULL) {
86	greg	1.2	stderr_v("cannot open X-windows; DISPLAY variable set?\n");
87	greg	1.1	return(NULL);
88			}
89			if (DisplayPlanes() < 4) {
90			stderr_v("not enough colors\n");
91			return(NULL);
92			}
93	greg	1.14	make_gmap(GAMMA); /* make color map */
94	greg	1.1
95			pickcursor = XCreateCursor(bcross_width, bcross_height,
96			bcross_bits, bcross_mask_bits,
97			bcross_x_hot, bcross_y_hot,
98			BlackPixel, WhitePixel, GXcopy);
99	greg	1.16	clientname = id;
100	greg	1.18	x_driver.xsiz = DisplayWidth()-(2*BORWIDTH);
101			x_driver.ysiz = DisplayHeight()-(COMHEIGHT+2*BORWIDTH);
102	greg	1.1	x_driver.inpready = 0;
103	greg	1.5	cmdvec = x_comout; /* set error vectors */
104	greg	1.1	if (wrnvec != NULL)
105			wrnvec = x_errout;
106			return(&x_driver);
107			}
108
109
110			static
111			x_close() /* close our display */
112			{
113	greg	1.5	cmdvec = NULL; /* reset error vectors */
114	greg	1.1	if (wrnvec != NULL)
115			wrnvec = stderr_v;
116			if (ourdisplay == NULL)
117			return;
118			if (comline != NULL) {
119			xt_close(comline);
120			comline = NULL;
121			}
122			if (gwind != 0) {
123			XDestroyWindow(gwind);
124			gwind = 0;
125			gwidth = gheight = 0;
126			}
127			XFreeCursor(pickcursor);
128	greg	1.12	freepixels();
129	greg	1.1	XCloseDisplay(ourdisplay);
130			ourdisplay = NULL;
131			}
132
133
134			static
135			x_clear(xres, yres) /* clear our display */
136			int xres, yres;
137			{
138	greg	1.18	if (xres < MINWIDTH)
139			xres = MINWIDTH;
140			if (yres < MINHEIGHT)
141			yres = MINHEIGHT;
142	greg	1.1	if (xres != gwidth \|\| yres != gheight) { /* new window */
143			if (comline != NULL)
144			xt_close(comline);
145	greg	1.17	if (gwind == 0) {
146	greg	1.18	gwind = XCreateWindow(RootWindow, 0, 0,
147	greg	1.17	xres, yres+COMHEIGHT, BORWIDTH,
148			BlackPixmap, BlackPixmap);
149			if (gwind == 0)
150			goto fail;
151			XStoreName(gwind, clientname);
152			XSelectInput(gwind, KeyPressed\|ButtonPressed\|
153			ExposeWindow\|ExposeRegion\|UnmapWindow);
154			XMapWindow(gwind);
155			} else
156			XChangeWindow(gwind, xres, yres+COMHEIGHT);
157	greg	1.1	comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN);
158			if (comline == NULL)
159			goto fail;
160			gwidth = xres;
161			gheight = yres;
162			} else /* just clear */
163			XClear(gwind);
164	greg	1.17	/* reinitialize color table */
165			if (ncolors == 0 && getpixels() == 0)
166			stderr_v("cannot allocate colors\n");
167			else
168			new_ctab(ncolors);
169			XSync(1); /* discard input */
170	greg	1.1	return;
171			fail:
172			stderr_v("Failure opening window in x_clear\n");
173			quit(1);
174			}
175
176
177			static
178			x_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
179			COLOR col;
180			int xmin, ymin, xmax, ymax;
181			{
182			extern long nrays; /* global ray count */
183	greg	1.14	extern int xnewcolr(); /* pixel assignment routine */
184	greg	1.1	static long lastflush = 0; /* ray count at last flush */
185
186			if (ncolors > 0) {
187			XPixSet(gwind, xmin, gheight-ymax, xmax-xmin, ymax-ymin,
188	greg	1.14	pixval[get_pixel(col, xnewcolr)]);
189	greg	1.1	}
190			if (nrays - lastflush >= WFLUSH) {
191	greg	1.9	if (ncolors <= 0) /* output necessary for death */
192			XPixSet(gwind,0,0,1,1,BlackPixel);
193	greg	1.8	checkinp();
194	greg	1.1	lastflush = nrays;
195			}
196			}
197
198
199			static
200			x_comin(inp) /* read in a command line */
201			char *inp;
202			{
203			int x_getc(), x_comout();
204
205	greg	1.18	if (fromcombuf(inp, &x_driver))
206			return;
207	greg	1.1	xt_cursor(comline, TBLKCURS);
208	greg	1.11	editline(inp, x_getc, x_comout);
209	greg	1.1	xt_cursor(comline, TNOCURS);
210			}
211
212
213			static
214			x_comout(out) /* output a string to command line */
215			char *out;
216			{
217			if (comline != NULL)
218			xt_puts(out, comline);
219	greg	1.8	XFlush();
220	greg	1.1	}
221
222
223			static
224			x_errout(msg) /* output an error message */
225			char *msg;
226			{
227			x_comout(msg);
228			stderr_v(msg); /* send to stderr also! */
229			}
230
231
232			static int
233			x_getcur(xp, yp) /* get cursor position */
234			int xp, yp;
235			{
236			while (XGrabMouse(gwind, pickcursor, ButtonPressed) == 0)
237			sleep(1);
238			XFocusKeyboard(gwind);
239			do
240			getevent();
241			while (c_last <= c_first && levptr(XEvent)->type != ButtonPressed);
242			*xp = levptr(XKeyOrButtonEvent)->x;
243			*yp = gheight-1 - levptr(XKeyOrButtonEvent)->y;
244			XFocusKeyboard(RootWindow);
245			XUngrabMouse();
246	greg	1.8	XFlush(); /* insure release */
247	greg	1.1	if (c_last > c_first) /* key pressed */
248			return(x_getc());
249			/* button pressed */
250			switch (levptr(XKeyOrButtonEvent)->detail & 0377) {
251			case LeftButton:
252			return(MB1);
253			case MiddleButton:
254			return(MB2);
255			case RightButton:
256			return(MB3);
257			}
258			return(ABORT);
259			}
260
261
262			static
263	greg	1.13	xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
264	greg	1.1	int ndx;
265	greg	1.13	int r, g, b;
266	greg	1.1	{
267			Color xcolor;
268
269			xcolor.pixel = pixval[ndx];
270	greg	1.13	xcolor.red = r << 8;
271			xcolor.green = g << 8;
272			xcolor.blue = b << 8;
273	greg	1.1
274			XStoreColor(&xcolor);
275			}
276
277
278	greg	1.17	static int
279	greg	1.12	getpixels() /* get the color map */
280	greg	1.1	{
281			int planes;
282
283	greg	1.17	freepixels();
284	greg	1.1	for (ncolors=(1<<DisplayPlanes())-3; ncolors>12; ncolors=ncolors*.937){
285			pixval = (int )malloc(ncolorssizeof(int));
286	greg	1.12	if (pixval == NULL)
287			break;
288	greg	1.1	if (XGetColorCells(0,ncolors,0,&planes,pixval) != 0)
289	greg	1.17	return(ncolors);
290	greg	1.1	free((char *)pixval);
291			}
292	greg	1.17	return(ncolors = 0);
293	greg	1.1	}
294
295
296			static
297	greg	1.12	freepixels() /* free our pixels */
298	greg	1.1	{
299			if (ncolors == 0)
300			return;
301			XFreeColors(pixval, ncolors, 0);
302			free((char *)pixval);
303			ncolors = 0;
304			}
305
306
307			static int
308			x_getc() /* get a command character */
309			{
310			while (c_last <= c_first) {
311			c_first = c_last = 0; /* reset */
312			getevent(); /* wait for key */
313			}
314			x_driver.inpready--;
315			return(c_queue[c_first++]);
316			}
317
318
319			static
320			getevent() /* get next event */
321			{
322			XNextEvent(levptr(XEvent));
323			switch (levptr(XEvent)->type) {
324			case KeyPressed:
325			getkey(levptr(XKeyPressedEvent));
326			break;
327			case ExposeWindow:
328	greg	1.18	windowchange(levptr(XExposeEvent));
329			break;
330	greg	1.1	case ExposeRegion:
331			fixwindow(levptr(XExposeEvent));
332			break;
333			case UnmapWindow:
334			if (levptr(XUnmapEvent)->subwindow == 0)
335	greg	1.12	freepixels();
336	greg	1.1	break;
337			case ButtonPressed: /* handled in x_getcur() */
338			break;
339			}
340			}
341
342
343			static
344	greg	1.18	windowchange(eexp) /* process window change event */
345			register XExposeEvent *eexp;
346			{
347			if (eexp->subwindow != 0) {
348			fixwindow(eexp);
349			return;
350			}
351			/* check for change in size */
352			if (eexp->width != gwidth \|\| eexp->height != gheight+COMHEIGHT) {
353			x_driver.xsiz = eexp->width;
354			x_driver.ysiz = eexp->height;
355			strcpy(getcombuf(&x_driver), "new\n");
356			return;
357			}
358			/* remap colors */
359			if (ncolors == 0 && getpixels() == 0) {
360			stderr_v("cannot allocate colors\n");
361			return;
362			}
363			new_ctab(ncolors);
364			/* redraw */
365			fixwindow(eexp);
366			}
367
368
369			static
370	greg	1.1	getkey(ekey) /* get input key */
371			register XKeyPressedEvent *ekey;
372			{
373			int n;
374			register char *str;
375
376			str = XLookupMapping(ekey, &n);
377			while (n-- > 0 && c_last < sizeof(c_queue))
378			c_queue[c_last++] = *str++;
379			x_driver.inpready = c_last - c_first;
380			}
381
382
383			static
384			fixwindow(eexp) /* repair damage to window */
385			register XExposeEvent *eexp;
386			{
387			if (eexp->subwindow == 0)
388	greg	1.18	sprintf(getcombuf(&x_driver), "repaint %d %d %d %d\n",
389			eexp->x, gheight - eexp->y - eexp->height,
390	greg	1.1	eexp->x + eexp->width, gheight - eexp->y);
391			else if (eexp->subwindow == comline->w)
392			xt_redraw(comline);
393			}