src/hd/rhd_x11.c

/* Copyright (c) 1997 Silicon Graphics, Inc. */

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

/*
 * X11 driver for holodeck display.
 * Based on rview driver.
 */

#include "standard.h"
#include "rhd_qtree.h"

#include  <X11/Xlib.h>
#include  <X11/cursorfont.h>
#include  <X11/Xutil.h>

#include  "x11icon.h"

#define CTRL(c)         ((c)-'@')

#define GAMMA           2.2             /* default gamma correction */

#define MOVPCT          10              /* percent distance to move */
#define MOVDIR(b)       ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)

#define MINWIDTH        480             /* minimum graphics window width */
#define MINHEIGHT       400             /* minimum graphics window height */

#define VIEWDIST        356             /* assumed viewing distance (mm) */

#define BORWIDTH        5               /* border width */

#define  ourscreen      DefaultScreen(ourdisplay)
#define  ourroot        RootWindow(ourdisplay,ourscreen)
#define  ourmask        (StructureNotifyMask|ExposureMask|KeyPressMask|\
                        ButtonPressMask|ButtonReleaseMask)

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

struct driver   odev;                   /* global device driver structure */

static XEvent  currentevent;            /* current event */

static int  ncolors = 0;                /* color table size */
static int  mapped = 0;                 /* window is mapped? */
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 GC  ourgc = 0;                   /* our graphics context for drawing */

static Colormap ourmap = 0;             /* our color map */

static double   pwidth, pheight;        /* pixel dimensions (mm) */

static int      inpresflags;            /* input result flags */

static int      headlocked = 0;         /* lock vertical motion */

static int  getpixels(), xnewcolr(), freepixels(), resizewindow(),
                getevent(), getkey(), moveview(), getmove(), fixwindow();
static unsigned long  true_pixel();


static int
mytmflags()                     /* figure out tone mapping flags */
{
        extern char     *progname;
        register char   *cp, *tail;
                                        /* find basic name */
        for (cp = tail = progname; *cp; cp++)
                if (*cp == '/')
                        tail = cp+1;
        for (cp = tail; *cp && *cp != '.'; cp++)
                ;
        if (cp-tail == 3 && !strncmp(tail, "x11", 3))
                return(TM_F_CAMERA);
        if (cp-tail == 4 && !strncmp(tail, "x11h", 4))
                return(TM_F_HUMAN);
        error(USER, "illegal driver name");
}


dev_open(id)                    /* initialize X11 driver */
char  *id;
{
        extern char  *getenv();
        char  *gv;
        double  gamval = GAMMA;
        int  nplanes;
        XSetWindowAttributes    ourwinattr;
        XWMHints  ourxwmhints;
        XSizeHints      oursizhints;
                                        /* set quadtree globals */
        qtDepthEps = 0.02;
        qtMinNodesiz = 2;
                                        /* open display server */
        ourdisplay = XOpenDisplay(NULL);
        if (ourdisplay == NULL)
                error(USER, "cannot open X-windows; DISPLAY variable set?\n");
                                        /* find a usable visual */
        nplanes = DisplayPlanes(ourdisplay, ourscreen);
        if (XMatchVisualInfo(ourdisplay,ourscreen,
                                nplanes>12?nplanes:24,TrueColor,&ourvinfo) ||
                        XMatchVisualInfo(ourdisplay,ourscreen,
                                nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
                ourblack = 0;
                ourwhite = ourvinfo.red_mask |
                                ourvinfo.green_mask |
                                ourvinfo.blue_mask ;
        } else {
                if (nplanes < 4)
                        error(INTERNAL, "not enough colors\n");
                if (!XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,PseudoColor,&ourvinfo) &&
                                !XMatchVisualInfo(ourdisplay,ourscreen,
                                        nplanes,GrayScale,&ourvinfo))
                        error(INTERNAL, "unsupported visual type\n");
                ourblack = BlackPixel(ourdisplay,ourscreen);
                ourwhite = WhitePixel(ourdisplay,ourscreen);
        }
                                        /* set gamma and tone mapping */
        if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
                        || (gv = getenv("DISPLAY_GAMMA")) != NULL)
                gamval = atof(gv);
        if (tmInit(mytmflags(), stdprims, gamval) == NULL)
                error(SYSTEM, "not enough memory in dev_open");
                                        /* open window */
        ourwinattr.background_pixel = ourblack;
        ourwinattr.border_pixel = ourblack;
        ourwinattr.event_mask = ourmask;
                                        /* 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|CWEventMask, &ourwinattr);
        if (gwind == 0)
                error(SYSTEM, "cannot create window\n");
        XStoreName(ourdisplay, gwind, id);
                                        /* get graphics context */
        ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
                                        /* set window manager hints */
        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;
        oursizhints.flags = PMinSize;
        XSetNormalHints(ourdisplay, gwind, &oursizhints);
                                        /* map the window and get its size */
        XMapWindow(ourdisplay, gwind);
        dev_input();
                                        /* allocate our leaf pile */
        if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) *
                        DisplayHeight(ourdisplay,ourscreen) /
                        (qtMinNodesiz*qtMinNodesiz)))
                error(SYSTEM, "insufficient memory for leaf storage");

                                        /* figure out sensible view */
        pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
                        DisplayWidth(ourdisplay, ourscreen);
        pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
                        DisplayHeight(ourdisplay, ourscreen);
        copystruct(&odev.v, &stdview);
        odev.name = id;
        odev.v.type = VT_PER;
        odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
        odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
        odev.ifd = ConnectionNumber(ourdisplay);
}


dev_close()                     /* close our display */
{
        freepixels();
        XFreeGC(ourdisplay, ourgc);
        XDestroyWindow(ourdisplay, gwind);
        gwind = 0;
        ourgc = 0;
        XCloseDisplay(ourdisplay);
        ourdisplay = NULL;
        qtFreeLeaves();
        tmDone(NULL);
        odev.v.type = 0;
        odev.hres = odev.vres = 0;
        odev.ifd = -1;
}


dev_view(nv)                    /* assign new driver view */
VIEW    *nv;
{
        if (nv != &odev.v)
                copystruct(&odev.v, nv);
        qtReplant();
}


int
dev_input()                     /* get X11 input */
{
        inpresflags = 0;

        do
                getevent();

        while (XQLength(ourdisplay) > 0);

        return(inpresflags);
}


dev_paintr(rgb, xmin, ymin, xmax, ymax)         /* fill a rectangle */
BYTE    rgb[3];
int  xmin, ymin, xmax, ymax;
{
        unsigned long  pixel;

        if (!mapped)
                return;
        if (ncolors > 0)
                pixel = pixval[get_pixel(rgb, xnewcolr)];
        else
                pixel = true_pixel(rgb);
        XSetForeground(ourdisplay, ourgc, pixel);
        XFillRectangle(ourdisplay, gwind, 
                ourgc, xmin, odev.vres-ymax, xmax-xmin, ymax-ymin);
}


int
dev_flush()                     /* flush output */
{
        qtUpdate();
        return(XPending(ourdisplay));
}


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))
                        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);
        free((char *)pixval);
        pixval = NULL;
        ncolors = 0;
        if (ourmap != DefaultColormap(ourdisplay,ourscreen))
                XFreeColormap(ourdisplay, ourmap);
        ourmap = 0;
}


static unsigned long
true_pixel(rgb)                 /* return true pixel value for color */
register BYTE   rgb[3];
{
        register unsigned long  rval;

        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
getevent()                      /* get next event */
{
        XNextEvent(ourdisplay, levptr(XEvent));
        switch (levptr(XEvent)->type) {
        case ConfigureNotify:
                resizewindow(levptr(XConfigureEvent));
                break;
        case UnmapNotify:
                mapped = 0;
                freepixels();
                break;
        case MapNotify:
                if (ourvinfo.class == PseudoColor ||
                                ourvinfo.class == GrayScale) {
                        if (getpixels() == 0)
                                error(SYSTEM, "cannot allocate colors\n");
                        new_ctab(ncolors);
                }
                mapped = 1;
                break;
        case Expose:
                fixwindow(levptr(XExposeEvent));
                break;
        case KeyPress:
                getkey(levptr(XKeyPressedEvent));
                break;
        case ButtonPress:
                getmove(levptr(XButtonPressedEvent));
                break;
        }
}


static
moveview(dx, dy, move)          /* move our view */
int     dx, dy, move;
{
        VIEW    nv;
        double  d;
        register int    i, li;
                                /* start with old view */
        copystruct(&nv, &odev.v);
                                /* change view direction */
        if (move) {
                if ((li = qtFindLeaf(dx, dy)) < 0)
                        return(0);      /* not on window */
                for (i = 0; i < 3; i++)
                        nv.vdir[i] = qtL.wp[li][i] - nv.vp[i];
        } else {
                if (viewray(nv.vp, nv.vdir, &odev.v,
                                (dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
                        return(0);      /* outside view */
        }
                                /* move viewpoint */
        if (move > 0)
                for (i = 0; i < 3; i++)
                        nv.vp[i] += MOVPCT/100. * nv.vdir[i];
        else if (move < 0)
                for (i = 0; i < 3; i++)
                        nv.vp[i] -= MOVPCT/100. * nv.vdir[i];
        if (move && headlocked) {
                d = 0;          /* bring head back to same height */
                for (i = 0; i < 3; i++)
                        d += odev.v.vup[i] * (odev.v.vp[i] - nv.vp[i]);
                for (i = 0; i < 3; i++)
                        nv.vp[i] += d * odev.v.vup[i];
        }
        if (setview(&nv) != NULL)
                return(0);      /* illegal view */
        dev_view(&nv);
        inpresflags |= DEV_NEWVIEW;
        return(1);
}


static
getmove(ebut)                           /* get view change */
XButtonPressedEvent     *ebut;
{
        int     whichbutton = ebut->button;
        int     oldnodesiz = qtMinNodesiz;
        Window  rootw, childw;
        int     rootx, rooty, wx, wy;
        unsigned int    statemask;

        qtMinNodesiz = 16;              /* for quicker update */

        do {
                if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
                                &rootx, &rooty, &wx, &wy, &statemask))
                        break;          /* on another screen */

                if (!moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton)))
                        sleep(1);
                else
                        qtUpdate();

        } while (!XCheckMaskEvent(ourdisplay,
                        ButtonReleaseMask, levptr(XEvent)));

        if (!(inpresflags & DEV_NEWVIEW)) {     /* do final motion */
                whichbutton = levptr(XButtonReleasedEvent)->button;
                wx = levptr(XButtonReleasedEvent)->x;
                wy = levptr(XButtonReleasedEvent)->y;
                moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton));
                dev_flush();
        }

        qtMinNodesiz = oldnodesiz;      /* restore quadtree resolution */
}


static
getkey(ekey)                            /* get input key */
register XKeyPressedEvent  *ekey;
{
        int  n;
        char    buf[8];

        n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
        if (n != 1)
                return;
        switch (buf[0]) {
        case 'h':                       /* turn on height motion lock */
                headlocked = 1;
                return;
        case 'H':                       /* turn off height motion lock */
                headlocked = 0;
                return;
        case CTRL('S'):
        case 'p':                       /* pause computation */
                inpresflags |= DEV_WAIT;
                return;
        case 'v':                       /* spit out view */
                fputs(VIEWSTR, stderr);
                fprintview(&odev.v, stderr);
                fputc('\n', stderr);
                return;
        case CTRL('Q'):
        case '\n':
        case '\r':                      /* resume computation */
                inpresflags |= DEV_RESUME;
                return;
        case CTRL('R'):                 /* redraw screen */
                if (ncolors > 0)
                        new_ctab(ncolors);
                qtRedraw(0, 0, odev.hres, odev.vres);
                return;
        case CTRL('L'):                 /* refresh from server */
                if (inpresflags & DEV_REDRAW)
                        return;
                XClearWindow(ourdisplay, gwind);
                XFlush(ourdisplay);
                qtCompost(100);                 /* unload the old tree */
                if (ncolors > 0)
                        new_ctab(ncolors);
                inpresflags |= DEV_REDRAW;      /* resend values from server */
                return;
        case CTRL('D'):
        case 'Q':
        case 'q':                       /* quit the program */
                inpresflags |= DEV_SHUTDOWN;
                return;
        default:
                XBell(ourdisplay, 0);
                return;
        }
}


static
fixwindow(eexp)                         /* repair damage to window */
register XExposeEvent  *eexp;
{
        if (odev.hres == 0 || odev.vres == 0) { /* first exposure */
                odev.hres = eexp->width;
                odev.vres = eexp->height;
                inpresflags |= DEV_NEWSIZE;
        }
        qtRedraw(eexp->x, odev.vres - eexp->y - eexp->height,
                        eexp->x + eexp->width, odev.vres - eexp->y);
}


static
resizewindow(ersz)                      /* resize window */
register XConfigureEvent  *ersz;
{
        if (ersz->width == odev.hres && ersz->height == odev.vres)
                return;

        if (odev.hres != 0 && odev.vres != 0) {
                odev.v.horiz = 2.*180./PI * atan(
                        tan(PI/180./2.*odev.v.horiz) * ersz->width/odev.hres );
                odev.v.vert = 2.*180./PI * atan(
                        tan(PI/180./2.*odev.v.vert) * ersz->height/odev.vres );
                inpresflags |= DEV_NEWVIEW;
        }
        odev.hres = ersz->width;
        odev.vres = ersz->height;

        inpresflags |= DEV_NEWSIZE;
}
Revision:	3.8
Committed:	Tue Nov 25 11:21:50 1997 UTC (26 years, 5 months ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 3.7:	+4 -0 lines
Log Message:	improved display update
#	User	Rev	Content
1	gregl	3.1	/* Copyright (c) 1997 Silicon Graphics, Inc. */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ SGI";
5			#endif
6
7			/*
8			* X11 driver for holodeck display.
9			* Based on rview driver.
10			*/
11
12			#include "standard.h"
13			#include "rhd_qtree.h"
14
15			#include <X11/Xlib.h>
16			#include <X11/cursorfont.h>
17			#include <X11/Xutil.h>
18
19			#include "x11icon.h"
20
21	gregl	3.2	#define CTRL(c) ((c)-'@')
22
23	gregl	3.1	#define GAMMA 2.2 /* default gamma correction */
24
25	gregl	3.2	#define MOVPCT 10 /* percent distance to move */
26			#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)
27
28	gregl	3.1	#define MINWIDTH 480 /* minimum graphics window width */
29			#define MINHEIGHT 400 /* minimum graphics window height */
30
31			#define VIEWDIST 356 /* assumed viewing distance (mm) */
32
33			#define BORWIDTH 5 /* border width */
34
35			#define ourscreen DefaultScreen(ourdisplay)
36			#define ourroot RootWindow(ourdisplay,ourscreen)
37			#define ourmask (StructureNotifyMask\|ExposureMask\|KeyPressMask\|\
38	gregl	3.2	ButtonPressMask\|ButtonReleaseMask)
39	gregl	3.1
40			#define levptr(etype) ((etype *)&currentevent)
41
42			struct driver odev; /* global device driver structure */
43
44			static XEvent currentevent; /* current event */
45
46			static int ncolors = 0; /* color table size */
47			static int mapped = 0; /* window is mapped? */
48			static unsigned long pixval = NULL; / allocated pixels */
49			static unsigned long ourblack=0, ourwhite=1;
50
51			static Display ourdisplay = NULL; / our display */
52
53			static XVisualInfo ourvinfo; /* our visual information */
54
55			static Window gwind = 0; /* our graphics window */
56
57			static GC ourgc = 0; /* our graphics context for drawing */
58
59			static Colormap ourmap = 0; /* our color map */
60
61			static double pwidth, pheight; /* pixel dimensions (mm) */
62
63			static int inpresflags; /* input result flags */
64
65	gregl	3.2	static int headlocked = 0; /* lock vertical motion */
66	gregl	3.1
67			static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
68	gregl	3.2	getevent(), getkey(), moveview(), getmove(), fixwindow();
69	gregl	3.1	static unsigned long true_pixel();
70
71
72			static int
73			mytmflags() /* figure out tone mapping flags */
74			{
75			extern char *progname;
76			register char cp, tail;
77			/* find basic name */
78			for (cp = tail = progname; *cp; cp++)
79			if (*cp == '/')
80			tail = cp+1;
81			for (cp = tail; cp && cp != '.'; cp++)
82			;
83			if (cp-tail == 3 && !strncmp(tail, "x11", 3))
84			return(TM_F_CAMERA);
85			if (cp-tail == 4 && !strncmp(tail, "x11h", 4))
86			return(TM_F_HUMAN);
87			error(USER, "illegal driver name");
88			}
89
90
91			dev_open(id) /* initialize X11 driver */
92			char *id;
93			{
94			extern char *getenv();
95			char *gv;
96			double gamval = GAMMA;
97			int nplanes;
98			XSetWindowAttributes ourwinattr;
99			XWMHints ourxwmhints;
100			XSizeHints oursizhints;
101	gregl	3.2	/* set quadtree globals */
102			qtDepthEps = 0.02;
103	gregl	3.4	qtMinNodesiz = 2;
104	gregl	3.1	/* open display server */
105			ourdisplay = XOpenDisplay(NULL);
106			if (ourdisplay == NULL)
107			error(USER, "cannot open X-windows; DISPLAY variable set?\n");
108			/* find a usable visual */
109			nplanes = DisplayPlanes(ourdisplay, ourscreen);
110			if (XMatchVisualInfo(ourdisplay,ourscreen,
111			nplanes>12?nplanes:24,TrueColor,&ourvinfo) \|\|
112			XMatchVisualInfo(ourdisplay,ourscreen,
113			nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
114			ourblack = 0;
115			ourwhite = ourvinfo.red_mask \|
116			ourvinfo.green_mask \|
117			ourvinfo.blue_mask ;
118			} else {
119			if (nplanes < 4)
120			error(INTERNAL, "not enough colors\n");
121			if (!XMatchVisualInfo(ourdisplay,ourscreen,
122			nplanes,PseudoColor,&ourvinfo) &&
123			!XMatchVisualInfo(ourdisplay,ourscreen,
124			nplanes,GrayScale,&ourvinfo))
125			error(INTERNAL, "unsupported visual type\n");
126			ourblack = BlackPixel(ourdisplay,ourscreen);
127			ourwhite = WhitePixel(ourdisplay,ourscreen);
128			}
129			/* set gamma and tone mapping */
130			if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
131			\|\| (gv = getenv("DISPLAY_GAMMA")) != NULL)
132			gamval = atof(gv);
133			if (tmInit(mytmflags(), stdprims, gamval) == NULL)
134			error(SYSTEM, "not enough memory in dev_open");
135			/* open window */
136			ourwinattr.background_pixel = ourblack;
137			ourwinattr.border_pixel = ourblack;
138			ourwinattr.event_mask = ourmask;
139			/* this is stupid */
140			ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
141			ourvinfo.visual, AllocNone);
142			gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
143			DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
144			DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
145			BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
146			CWBackPixel\|CWBorderPixel\|CWColormap\|CWEventMask, &ourwinattr);
147			if (gwind == 0)
148			error(SYSTEM, "cannot create window\n");
149			XStoreName(ourdisplay, gwind, id);
150			/* get graphics context */
151			ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
152			/* set window manager hints */
153			ourxwmhints.flags = InputHint\|IconPixmapHint;
154			ourxwmhints.input = True;
155			ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
156			gwind, x11icon_bits, x11icon_width, x11icon_height);
157			XSetWMHints(ourdisplay, gwind, &ourxwmhints);
158			oursizhints.min_width = MINWIDTH;
159			oursizhints.min_height = MINHEIGHT;
160			oursizhints.flags = PMinSize;
161			XSetNormalHints(ourdisplay, gwind, &oursizhints);
162			/* map the window and get its size */
163			XMapWindow(ourdisplay, gwind);
164			dev_input();
165	gregl	3.2	/* allocate our leaf pile */
166			if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) *
167			DisplayHeight(ourdisplay,ourscreen) /
168			(qtMinNodesiz*qtMinNodesiz)))
169			error(SYSTEM, "insufficient memory for leaf storage");
170
171	gregl	3.1	/* figure out sensible view */
172			pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
173			DisplayWidth(ourdisplay, ourscreen);
174			pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
175			DisplayHeight(ourdisplay, ourscreen);
176			copystruct(&odev.v, &stdview);
177			odev.name = id;
178			odev.v.type = VT_PER;
179			odev.v.horiz = 2.180./PI atan(0.5/VIEWDISTpwidthodev.hres);
180			odev.v.vert = 2.180./PI atan(0.5/VIEWDISTpheightodev.vres);
181			odev.ifd = ConnectionNumber(ourdisplay);
182			}
183
184
185			dev_close() /* close our display */
186			{
187			freepixels();
188			XFreeGC(ourdisplay, ourgc);
189			XDestroyWindow(ourdisplay, gwind);
190			gwind = 0;
191			ourgc = 0;
192			XCloseDisplay(ourdisplay);
193			ourdisplay = NULL;
194			qtFreeLeaves();
195			tmDone(NULL);
196			odev.v.type = 0;
197			odev.hres = odev.vres = 0;
198			odev.ifd = -1;
199			}
200
201
202			dev_view(nv) /* assign new driver view */
203			VIEW *nv;
204			{
205			if (nv != &odev.v)
206			copystruct(&odev.v, nv);
207			qtReplant();
208			}
209
210
211			int
212			dev_input() /* get X11 input */
213			{
214			inpresflags = 0;
215	gregl	3.5
216	gregl	3.1	do
217			getevent();
218
219			while (XQLength(ourdisplay) > 0);
220
221			return(inpresflags);
222			}
223
224
225			dev_paintr(rgb, xmin, ymin, xmax, ymax) /* fill a rectangle */
226			BYTE rgb[3];
227			int xmin, ymin, xmax, ymax;
228			{
229			unsigned long pixel;
230
231			if (!mapped)
232			return;
233			if (ncolors > 0)
234			pixel = pixval[get_pixel(rgb, xnewcolr)];
235			else
236			pixel = true_pixel(rgb);
237			XSetForeground(ourdisplay, ourgc, pixel);
238			XFillRectangle(ourdisplay, gwind,
239			ourgc, xmin, odev.vres-ymax, xmax-xmin, ymax-ymin);
240			}
241
242
243			int
244			dev_flush() /* flush output */
245			{
246			qtUpdate();
247			return(XPending(ourdisplay));
248			}
249
250
251			static
252			xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
253			int ndx;
254			int r, g, b;
255			{
256			XColor xcolor;
257
258			xcolor.pixel = pixval[ndx];
259			xcolor.red = r << 8;
260			xcolor.green = g << 8;
261			xcolor.blue = b << 8;
262			xcolor.flags = DoRed\|DoGreen\|DoBlue;
263
264			XStoreColor(ourdisplay, ourmap, &xcolor);
265			}
266
267
268			static int
269			getpixels() /* get the color map */
270			{
271			XColor thiscolor;
272			register int i, j;
273
274			if (ncolors > 0)
275			return(ncolors);
276			if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
277			ourmap = DefaultColormap(ourdisplay,ourscreen);
278			goto loop;
279			}
280			newmap:
281			ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
282			loop:
283			for (ncolors = ourvinfo.colormap_size;
284			ncolors > ourvinfo.colormap_size/3;
285			ncolors = ncolors*.937) {
286			pixval = (unsigned long )malloc(ncolorssizeof(unsigned long));
287			if (pixval == NULL)
288			return(ncolors = 0);
289			if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
290			break;
291			free((char *)pixval);
292			pixval = NULL;
293			}
294			if (pixval == NULL) {
295			if (ourmap == DefaultColormap(ourdisplay,ourscreen))
296			goto newmap; /* try it with our map */
297			else
298			return(ncolors = 0); /* failed */
299			}
300			if (ourmap != DefaultColormap(ourdisplay,ourscreen))
301			for (i = 0; i < ncolors; i++) { /* reset black and white */
302			if (pixval[i] != ourblack && pixval[i] != ourwhite)
303			continue;
304			thiscolor.pixel = pixval[i];
305			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
306			XQueryColor(ourdisplay,
307			DefaultColormap(ourdisplay,ourscreen),
308			&thiscolor);
309			XStoreColor(ourdisplay, ourmap, &thiscolor);
310			for (j = i; j+1 < ncolors; j++)
311			pixval[j] = pixval[j+1];
312			ncolors--;
313			i--;
314			}
315			XSetWindowColormap(ourdisplay, gwind, ourmap);
316			return(ncolors);
317			}
318
319
320			static
321			freepixels() /* free our pixels */
322			{
323			if (ncolors == 0)
324			return;
325			XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
326			free((char *)pixval);
327			pixval = NULL;
328			ncolors = 0;
329			if (ourmap != DefaultColormap(ourdisplay,ourscreen))
330			XFreeColormap(ourdisplay, ourmap);
331			ourmap = 0;
332			}
333
334
335			static unsigned long
336			true_pixel(rgb) /* return true pixel value for color */
337			register BYTE rgb[3];
338			{
339			register unsigned long rval;
340
341			rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
342			rval \|= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
343			rval \|= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
344			return(rval);
345			}
346
347
348			static
349			getevent() /* get next event */
350			{
351			XNextEvent(ourdisplay, levptr(XEvent));
352			switch (levptr(XEvent)->type) {
353			case ConfigureNotify:
354			resizewindow(levptr(XConfigureEvent));
355			break;
356			case UnmapNotify:
357			mapped = 0;
358			freepixels();
359			break;
360			case MapNotify:
361			if (ourvinfo.class == PseudoColor \|\|
362			ourvinfo.class == GrayScale) {
363			if (getpixels() == 0)
364			error(SYSTEM, "cannot allocate colors\n");
365			new_ctab(ncolors);
366			}
367			mapped = 1;
368			break;
369			case Expose:
370			fixwindow(levptr(XExposeEvent));
371			break;
372			case KeyPress:
373			getkey(levptr(XKeyPressedEvent));
374			break;
375			case ButtonPress:
376	gregl	3.2	getmove(levptr(XButtonPressedEvent));
377	gregl	3.1	break;
378			}
379			}
380
381
382			static
383	gregl	3.2	moveview(dx, dy, move) /* move our view */
384			int dx, dy, move;
385			{
386			VIEW nv;
387			double d;
388	gregl	3.4	register int i, li;
389	gregl	3.2	/* start with old view */
390			copystruct(&nv, &odev.v);
391			/* change view direction */
392			if (move) {
393	gregl	3.4	if ((li = qtFindLeaf(dx, dy)) < 0)
394	gregl	3.2	return(0); /* not on window */
395			for (i = 0; i < 3; i++)
396	gregl	3.4	nv.vdir[i] = qtL.wp[li][i] - nv.vp[i];
397	gregl	3.2	} else {
398			if (viewray(nv.vp, nv.vdir, &odev.v,
399			(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
400			return(0); /* outside view */
401			}
402			/* move viewpoint */
403			if (move > 0)
404			for (i = 0; i < 3; i++)
405			nv.vp[i] += MOVPCT/100. * nv.vdir[i];
406			else if (move < 0)
407			for (i = 0; i < 3; i++)
408			nv.vp[i] -= MOVPCT/100. * nv.vdir[i];
409			if (move && headlocked) {
410			d = 0; /* bring head back to same height */
411			for (i = 0; i < 3; i++)
412			d += odev.v.vup[i] * (odev.v.vp[i] - nv.vp[i]);
413			for (i = 0; i < 3; i++)
414			nv.vp[i] += d * odev.v.vup[i];
415			}
416			if (setview(&nv) != NULL)
417			return(0); /* illegal view */
418			dev_view(&nv);
419			inpresflags \|= DEV_NEWVIEW;
420			return(1);
421			}
422
423
424			static
425			getmove(ebut) /* get view change */
426			XButtonPressedEvent *ebut;
427			{
428			int whichbutton = ebut->button;
429			int oldnodesiz = qtMinNodesiz;
430			Window rootw, childw;
431			int rootx, rooty, wx, wy;
432			unsigned int statemask;
433
434			qtMinNodesiz = 16; /* for quicker update */
435
436			do {
437			if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
438			&rootx, &rooty, &wx, &wy, &statemask))
439			break; /* on another screen */
440
441			if (!moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton)))
442			sleep(1);
443	gregl	3.4	else
444			qtUpdate();
445	gregl	3.2
446			} while (!XCheckMaskEvent(ourdisplay,
447			ButtonReleaseMask, levptr(XEvent)));
448
449			if (!(inpresflags & DEV_NEWVIEW)) { /* do final motion */
450			whichbutton = levptr(XButtonReleasedEvent)->button;
451			wx = levptr(XButtonReleasedEvent)->x;
452			wy = levptr(XButtonReleasedEvent)->y;
453			moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton));
454	gregl	3.8	dev_flush();
455	gregl	3.2	}
456
457			qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */
458			}
459
460
461			static
462	gregl	3.1	getkey(ekey) /* get input key */
463			register XKeyPressedEvent *ekey;
464			{
465			int n;
466			char buf[8];
467
468			n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
469			if (n != 1)
470			return;
471			switch (buf[0]) {
472			case 'h': /* turn on height motion lock */
473	gregl	3.2	headlocked = 1;
474	gregl	3.1	return;
475			case 'H': /* turn off height motion lock */
476	gregl	3.2	headlocked = 0;
477	gregl	3.1	return;
478	gregl	3.5	case CTRL('S'):
479	gregl	3.2	case 'p': /* pause computation */
480			inpresflags \|= DEV_WAIT;
481			return;
482	gregl	3.7	case 'v': /* spit out view */
483			fputs(VIEWSTR, stderr);
484			fprintview(&odev.v, stderr);
485			fputc('\n', stderr);
486			return;
487	gregl	3.5	case CTRL('Q'):
488	gregl	3.2	case '\n':
489	gregl	3.5	case '\r': /* resume computation */
490			inpresflags \|= DEV_RESUME;
491	gregl	3.2	return;
492	gregl	3.7	case CTRL('R'): /* redraw screen */
493			if (ncolors > 0)
494			new_ctab(ncolors);
495			qtRedraw(0, 0, odev.hres, odev.vres);
496			return;
497			case CTRL('L'): /* refresh from server */
498	gregl	3.8	if (inpresflags & DEV_REDRAW)
499			return;
500	gregl	3.7	XClearWindow(ourdisplay, gwind);
501	gregl	3.8	XFlush(ourdisplay);
502	gregl	3.6	qtCompost(100); /* unload the old tree */
503	gregl	3.3	if (ncolors > 0)
504			new_ctab(ncolors);
505	gregl	3.6	inpresflags \|= DEV_REDRAW; /* resend values from server */
506	gregl	3.3	return;
507	gregl	3.2	case CTRL('D'):
508	gregl	3.1	case 'Q':
509			case 'q': /* quit the program */
510			inpresflags \|= DEV_SHUTDOWN;
511			return;
512			default:
513			XBell(ourdisplay, 0);
514			return;
515			}
516			}
517
518
519			static
520			fixwindow(eexp) /* repair damage to window */
521			register XExposeEvent *eexp;
522			{
523			if (odev.hres == 0 \|\| odev.vres == 0) { /* first exposure */
524			odev.hres = eexp->width;
525			odev.vres = eexp->height;
526			inpresflags \|= DEV_NEWSIZE;
527			}
528			qtRedraw(eexp->x, odev.vres - eexp->y - eexp->height,
529			eexp->x + eexp->width, odev.vres - eexp->y);
530			}
531
532
533			static
534			resizewindow(ersz) /* resize window */
535			register XConfigureEvent *ersz;
536			{
537			if (ersz->width == odev.hres && ersz->height == odev.vres)
538			return;
539
540			if (odev.hres != 0 && odev.vres != 0) {
541			odev.v.horiz = 2.180./PI atan(
542			tan(PI/180./2.odev.v.horiz) ersz->width/odev.hres );
543			odev.v.vert = 2.180./PI atan(
544			tan(PI/180./2.odev.v.vert) ersz->height/odev.vres );
545			inpresflags \|= DEV_NEWVIEW;
546			}
547			odev.hres = ersz->width;
548			odev.vres = ersz->height;
549
550			inpresflags \|= DEV_NEWSIZE;
551			}