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/* Copyright (c) 1997 Silicon Graphics, Inc. */
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#ifndef lint
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static char SCCSid[] = "$SunId$ SGI";
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#endif
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/*
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* OpenGL GLX driver for holodeck display.
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* Based on x11 driver.
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*/
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#include "standard.h"
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#include "tonemap.h"
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#include "rhdriver.h"
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#include <GL/glx.h>
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#include "x11icon.h"
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#ifndef FEQ
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#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY)
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#endif
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#ifndef int4
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#define int4 int
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#endif
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#ifndef FREEPCT
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#define FREEPCT 10 /* percentage of values to free */
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#endif
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#ifndef NCONEV
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#define NCONEV 7 /* number of cone base vertices */
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#endif
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#ifndef CONEH
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#define CONEH 5. /* cone height (fraction of depth) */
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#endif
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#ifndef CONEW
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#define CONEW 0.07 /* cone width (fraction of screen) */
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#endif
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#ifndef DIRPEN
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#define DIRPEN 0.001 /* direction penalty factor */
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#endif
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#define GAMMA 1.4 /* default gamma correction */
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#define MOVPCT 7 /* percent distance to move /frame */
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0)
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#define MINWIDTH 480 /* minimum graphics window width */
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#define MINHEIGHT 400 /* minimum graphics window height */
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#define VIEWDIST 356 /* assumed viewing distance (mm) */
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#define BORWIDTH 5 /* border width */
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#define ourscreen DefaultScreen(ourdisplay)
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#define ourroot RootWindow(ourdisplay,ourscreen)
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\
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ButtonPressMask|ButtonReleaseMask)
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#define levptr(etype) ((etype *)¤tevent)
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struct driver odev; /* global device driver structure */
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static XEvent currentevent; /* current event */
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static int mapped = 0; /* window is mapped? */
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static unsigned long ourblack=0, ourwhite=~0;
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static Display *ourdisplay = NULL; /* our display */
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static XVisualInfo *ourvinf; /* our visual information */
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static Window gwind = 0; /* our graphics window */
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static GLXContext gctx; /* our GLX context */
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static double mindepth = FHUGE; /* minimum depth value so far */
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static double maxdepth = 0.; /* maximum depth value so far */
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static double pwidth, pheight; /* pixel dimensions (mm) */
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static FVECT conev[NCONEV]; /* drawing cone */
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static double coneh; /* cone height */
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static int inpresflags; /* input result flags */
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static int headlocked = 0; /* lock vertical motion */
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static struct {
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float (*wp)[3]; /* world intersection point array */
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int4 *wd; /* world direction array */
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TMbright *brt; /* encoded brightness array */
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BYTE (*chr)[3]; /* encoded chrominance array */
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BYTE (*rgb)[3]; /* tone-mapped color array */
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BYTE *alpha; /* alpha values */
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int nl; /* count of values */
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int bl, tl; /* bottom and top (next) value index */
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int tml; /* next value needing tone-mapping */
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int drl; /* next value in need of drawing */
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char *base; /* base of allocated memory */
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} rV; /* our collection of values */
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static int *valmap = NULL; /* sorted map of screen values */
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static int vmaplen = 0; /* value map length */
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#define redraw() (rV.drl = rV.bl)
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static int resizewindow(), getevent(), getkey(), moveview(),
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setGLview(), getmove(), fixwindow(), mytmflags(),
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drawvalue(), valcmp(), clralphas(), setalphas(), mergalphas(),
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IndexValue(), Compost(), FindValue(), TMapValues(),
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AllocValues(), FreeValues();
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extern int4 encodedir();
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extern double fdir2diff(), dir2diff();
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dev_open(id) /* initialize X11 driver */
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char *id;
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{
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extern char *getenv();
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8,
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8,
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GLX_ALPHA_SIZE,8, GLX_DEPTH_SIZE,15,
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None};
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char *gv;
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double gamval = GAMMA;
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XSetWindowAttributes ourwinattr;
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XWMHints ourxwmhints;
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XSizeHints oursizhints;
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/* open display server */
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ourdisplay = XOpenDisplay(NULL);
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if (ourdisplay == NULL)
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error(USER, "cannot open X-windows; DISPLAY variable set?\n");
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/* find a usable visual */
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest);
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if (ourvinf == NULL)
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error(USER, "no suitable visuals available");
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/* get a context */
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE);
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/* set gamma and tone mapping */
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if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
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|| (gv = getenv("DISPLAY_GAMMA")) != NULL)
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gamval = atof(gv);
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if (tmInit(mytmflags(), stdprims, gamval) == NULL)
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error(SYSTEM, "not enough memory in dev_open");
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/* open window */
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ourwinattr.background_pixel = ourblack;
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ourwinattr.border_pixel = ourblack;
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ourwinattr.event_mask = ourmask;
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/* this is stupid */
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
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ourvinf->visual, AllocNone);
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual,
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr);
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if (gwind == 0)
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error(SYSTEM, "cannot create window\n");
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XStoreName(ourdisplay, gwind, id);
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/* set window manager hints */
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ourxwmhints.flags = InputHint|IconPixmapHint;
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ourxwmhints.input = True;
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
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gwind, x11icon_bits, x11icon_width, x11icon_height);
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XSetWMHints(ourdisplay, gwind, &ourxwmhints);
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oursizhints.min_width = MINWIDTH;
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oursizhints.min_height = MINHEIGHT;
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oursizhints.flags = PMinSize;
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XSetNormalHints(ourdisplay, gwind, &oursizhints);
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/* set GLX context */
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glXMakeCurrent(ourdisplay, gwind, gctx);
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LEQUAL);
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glShadeModel(GL_FLAT);
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glDisable(GL_DITHER);
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/* figure out sensible view */
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
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DisplayWidth(ourdisplay, ourscreen);
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
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DisplayHeight(ourdisplay, ourscreen);
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copystruct(&odev.v, &stdview);
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odev.v.type = VT_PER;
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/* map the window */
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XMapWindow(ourdisplay, gwind);
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dev_input(); /* sets size and view angles */
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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/* allocate our value list */
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if (!AllocValues(DisplayWidth(ourdisplay,ourscreen) *
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DisplayHeight(ourdisplay,ourscreen) / 4))
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error(SYSTEM, "insufficient memory for value storage");
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odev.name = id;
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odev.ifd = ConnectionNumber(ourdisplay);
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}
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dev_close() /* close our display and free resources */
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{
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glXMakeCurrent(ourdisplay, None, NULL);
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glXDestroyContext(ourdisplay, gctx);
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XDestroyWindow(ourdisplay, gwind);
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gwind = 0;
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XCloseDisplay(ourdisplay);
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ourdisplay = NULL;
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tmDone(NULL);
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FreeValues();
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odev.v.type = 0;
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odev.hres = odev.vres = 0;
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odev.ifd = -1;
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}
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int
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dev_view(nv) /* assign new driver view */
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register VIEW *nv;
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{
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if (nv->type != VT_PER || /* check view legality */
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nv->horiz > 120. || nv->vert > 120.) {
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error(COMMAND, "illegal view type/angle");
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nv->type = VT_PER;
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nv->horiz = odev.v.horiz;
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nv->vert = odev.v.vert;
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return(0);
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}
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if (nv != &odev.v) {
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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */
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!FEQ(nv->vert,odev.v.vert)) {
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int dw = DisplayWidth(ourdisplay,ourscreen);
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int dh = DisplayHeight(ourdisplay,ourscreen);
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dw -= 25; /* for window frame */
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dh -= 50;
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odev.hres = 2.*VIEWDIST/pwidth *
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tan(PI/180./2.*nv->horiz);
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odev.vres = 2.*VIEWDIST/pheight *
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tan(PI/180./2.*nv->vert);
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if (odev.hres > dw) {
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odev.vres = dw * odev.vres / odev.hres;
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odev.hres = dw;
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}
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if (odev.vres > dh) {
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odev.hres = dh * odev.hres / odev.vres;
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odev.vres = dh;
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}
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres);
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dev_input(); /* get resize event */
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}
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copystruct(&odev.v, nv);
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setGLview();
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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redraw();
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}
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return(1);
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}
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int
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dev_input() /* get X11 input */
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{
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inpresflags = 0;
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do
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getevent();
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while (XQLength(ourdisplay) > 0);
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return(inpresflags);
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}
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dev_value(c, p, v) /* add a pixel value to our list */
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COLR c;
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FVECT p, v;
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{
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register int li;
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li = rV.tl++;
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if (rV.tl >= rV.nl) /* get next leaf in ring */
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rV.tl = 0;
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if (rV.tl == rV.bl) /* need to shake some free */
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Compost(FREEPCT);
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VCOPY(rV.wp[li], p);
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rV.wd[li] = encodedir(v);
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tmCvColrs(&rV.brt[li], rV.chr[li], c, 1);
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}
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int
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dev_flush() /* flush output */
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{
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if (mapped) {
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TMapValues(0);
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while (rV.drl != rV.tl) {
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drawvalue(rV.drl);
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if (++rV.drl >= rV.nl)
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rV.drl = 0;
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}
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glFlush();
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}
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return(XPending(ourdisplay));
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}
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static int
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mytmflags() /* figure out tone mapping flags */
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{
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extern char *progname;
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register char *cp, *tail;
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/* find basic name */
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for (cp = tail = progname; *cp; cp++)
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if (*cp == '/')
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tail = cp+1;
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for (cp = tail; *cp && *cp != '.'; cp++)
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;
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if (cp-tail == 3 && !strncmp(tail, "glx", 3))
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return(TM_F_CAMERA);
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if (cp-tail == 4 && !strncmp(tail, "glxh", 4))
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return(TM_F_HUMAN);
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error(USER, "illegal driver name");
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}
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static
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setGLview() /* set our GL view */
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{
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double xmin, xmax, ymin, ymax, zmin, zmax;
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double d, cx, sx, crad;
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FVECT vx, vy;
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register int i, j;
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/* compute view frustum */
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if (normalize(odev.v.vdir) == 0.0)
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return;
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if (mindepth < maxdepth) {
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zmin = 0.25*mindepth;
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zmax = 4.0*(1.+CONEH)*maxdepth;
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} else {
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zmin = 0.01;
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zmax = 1000.;
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}
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if (odev.v.vfore > FTINY)
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zmin = odev.v.vfore;
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if (odev.v.vaft > FTINY)
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zmax = odev.v.vaft;
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xmax = zmin * tan(PI/180./2. * odev.v.horiz);
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xmin = -xmax;
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d = odev.v.hoff * (xmax - xmin);
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xmin += d; xmax += d;
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ymax = zmin * tan(PI/180./2. * odev.v.vert);
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ymin = -ymax;
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d = odev.v.voff * (ymax - ymin);
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ymin += d; ymax += d;
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/* set view matrix */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustum(xmin, xmax, ymin, ymax, zmin, zmax);
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gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2],
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odev.v.vp[0] + odev.v.vdir[0],
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odev.v.vp[1] + odev.v.vdir[1],
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odev.v.vp[2] + odev.v.vdir[2],
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odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]);
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/* set viewport */
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glViewport(0, 0, odev.hres, odev.vres);
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/* initialize cone for Vornoi polys */
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coneh = CONEH*(zmax - zmin);
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crad = 0.5 * CONEW * 0.5*(xmax-xmin + ymax-ymin) * (zmin+coneh)/zmin;
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vy[0] = vy[1] = vy[2] = 0.;
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for (i = 0; i < 3; i++)
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if (odev.v.vdir[i] < 0.6 && odev.v.vdir[i] > -0.6)
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break;
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vy[i] = 1.;
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fcross(vx, vy, odev.v.vdir);
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normalize(vx);
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fcross(vy, odev.v.vdir, vx);
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for (j = 0, d = 0.; j < NCONEV; j++, d += 2.*PI/NCONEV) {
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cx = crad*cos(d); sx = crad*sin(d);
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for (i = 0; i < 3; i++)
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conev[j][i] = coneh*odev.v.vdir[i] +
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cx*vx[i] + sx*vy[i];
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}
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}
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static
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drawvalue(li) /* draw a pixel value as a cone */
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register int li;
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{
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static FVECT disp;
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FVECT apex;
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double d, dorg, dnew, h, v;
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register int i;
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/* compute cone coordinates */
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disp[0] = rV.wp[li][0] - odev.v.vp[0];
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disp[1] = rV.wp[li][1] - odev.v.vp[1];
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disp[2] = rV.wp[li][2] - odev.v.vp[2];
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dorg = DOT(disp,odev.v.vdir);
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if (dorg <= odev.v.vfore)
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return; /* clipped too near */
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if (odev.v.vaft > FTINY && dorg > odev.v.vaft)
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return; /* clipped too far */
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if (dorg > 1e5) { /* background pixel */
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dnew = maxdepth;
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d = dnew/dorg;
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} else { /* foreground pixel, compute penalty */
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normalize(disp);
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d = dnew = dorg + coneh*fdir2diff(rV.wd[li],disp)*DIRPEN;
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}
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/* compute adjusted apex position */
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disp[0] *= d; disp[1] *= d; disp[2] *= d;
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apex[0] = odev.v.vp[0] + disp[0];
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apex[1] = odev.v.vp[1] + disp[1];
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apex[2] = odev.v.vp[2] + disp[2];
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/* compute view position and base offset */
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h = DOT(disp,odev.v.hvec)/(dnew*odev.v.hn2);
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v = DOT(disp,odev.v.vvec)/(dnew*odev.v.vn2);
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if (fabs(h - odev.v.hoff) > 0.5 || fabs(v - odev.v.voff) > 0.5)
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return; /* clipped off screen */
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if (dorg < mindepth)
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mindepth = dorg;
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if (dorg > maxdepth)
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maxdepth = dorg;
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for (i = 0; i < 3; i++)
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disp[i] = apex[i] + coneh*(h*odev.v.hvec[i] + v*odev.v.vvec[i]);
|
| 425 |
/* draw cone (pyramid approx.) */
|
| 426 |
glColor4ub(rV.rgb[li][0], rV.rgb[li][1], rV.rgb[li][2], rV.alpha[li]);
|
| 427 |
glBegin(GL_TRIANGLE_FAN);
|
| 428 |
glVertex3f(apex[0], apex[1], apex[2]);
|
| 429 |
for (i = 0; i < NCONEV; i++)
|
| 430 |
glVertex3d(conev[i][0] + disp[0], conev[i][1] + disp[1],
|
| 431 |
conev[i][2] + disp[2]);
|
| 432 |
/* connect last face to first */
|
| 433 |
glVertex3d(conev[0][0] + disp[0], conev[0][1] + disp[1],
|
| 434 |
conev[0][2] + disp[2]);
|
| 435 |
glEnd(); /* done */
|
| 436 |
}
|
| 437 |
|
| 438 |
|
| 439 |
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\
|
| 440 |
sizeof(TMbright)+7*sizeof(BYTE))
|
| 441 |
|
| 442 |
static
|
| 443 |
AllocValues(n) /* allocate space for n values */
|
| 444 |
register int n;
|
| 445 |
{
|
| 446 |
unsigned nbytes;
|
| 447 |
register unsigned i;
|
| 448 |
|
| 449 |
if (n <= 0)
|
| 450 |
return(0);
|
| 451 |
if (rV.nl >= n)
|
| 452 |
return(rV.nl);
|
| 453 |
else if (rV.nl > 0)
|
| 454 |
free(rV.base);
|
| 455 |
/* round space up to nearest power of 2 */
|
| 456 |
nbytes = n*LEAFSIZ + 8;
|
| 457 |
for (i = 1024; nbytes > i; i <<= 1)
|
| 458 |
;
|
| 459 |
n = (i - 8) / LEAFSIZ; /* should we make sure n is even? */
|
| 460 |
rV.base = (char *)malloc(n*LEAFSIZ);
|
| 461 |
if (rV.base == NULL)
|
| 462 |
return(0);
|
| 463 |
/* assign larger alignment types earlier */
|
| 464 |
rV.wp = (float (*)[3])rV.base;
|
| 465 |
rV.wd = (int4 *)(rV.wp + n);
|
| 466 |
rV.brt = (TMbright *)(rV.wd + n);
|
| 467 |
rV.chr = (BYTE (*)[3])(rV.brt + n);
|
| 468 |
rV.rgb = (BYTE (*)[3])(rV.chr + n);
|
| 469 |
rV.alpha = (BYTE *)(rV.rgb + n);
|
| 470 |
rV.nl = n;
|
| 471 |
rV.drl = rV.tml = rV.bl = rV.tl = 0;
|
| 472 |
return(n);
|
| 473 |
}
|
| 474 |
|
| 475 |
#undef LEAFSIZ
|
| 476 |
|
| 477 |
|
| 478 |
static
|
| 479 |
FreeValues() /* free our allocated values */
|
| 480 |
{
|
| 481 |
if (rV.nl <= 0)
|
| 482 |
return;
|
| 483 |
free(rV.base);
|
| 484 |
rV.base = NULL;
|
| 485 |
rV.nl = 0;
|
| 486 |
}
|
| 487 |
|
| 488 |
|
| 489 |
static
|
| 490 |
clralphas() /* prepare for new alpha values */
|
| 491 |
{
|
| 492 |
if (!vmaplen)
|
| 493 |
return;
|
| 494 |
free((char *)valmap);
|
| 495 |
valmap = NULL;
|
| 496 |
vmaplen = 0;
|
| 497 |
}
|
| 498 |
|
| 499 |
|
| 500 |
static int
|
| 501 |
valcmp(v1p, v2p) /* compare two pixel values */
|
| 502 |
int *v1p, *v2p;
|
| 503 |
{
|
| 504 |
register int v1 = *v1p, v2 = *v2p;
|
| 505 |
register int c;
|
| 506 |
|
| 507 |
if ((c = rV.rgb[v1][0] - rV.rgb[v2][0])) return(c);
|
| 508 |
if ((c = rV.rgb[v1][1] - rV.rgb[v2][1])) return(c);
|
| 509 |
if ((c = rV.rgb[v1][2] - rV.rgb[v2][2])) return(c);
|
| 510 |
return(rV.alpha[v1] - rV.alpha[v2]);
|
| 511 |
}
|
| 512 |
|
| 513 |
|
| 514 |
static
|
| 515 |
mergalphas(adest, al1, n1, al2, n2) /* merge two sorted alpha lists */
|
| 516 |
register int *adest, *al1, *al2;
|
| 517 |
int n1, n2;
|
| 518 |
{
|
| 519 |
register int cmp;
|
| 520 |
|
| 521 |
while (n1 | n2) {
|
| 522 |
if (!n1) cmp = 1;
|
| 523 |
else if (!n2) cmp = -1;
|
| 524 |
else cmp = valcmp(al1, al2);
|
| 525 |
if (cmp > 0) {
|
| 526 |
*adest++ = *al2++;
|
| 527 |
n2--;
|
| 528 |
} else {
|
| 529 |
*adest++ = *al1++;
|
| 530 |
n1--;
|
| 531 |
}
|
| 532 |
}
|
| 533 |
}
|
| 534 |
|
| 535 |
|
| 536 |
static
|
| 537 |
setalphas(vbeg, nvals) /* add values to our map and set alphas */
|
| 538 |
int vbeg, nvals;
|
| 539 |
{
|
| 540 |
register int *newmap;
|
| 541 |
short ccmp[3], lastalpha;
|
| 542 |
int newmaplen;
|
| 543 |
|
| 544 |
if (nvals <= 0)
|
| 545 |
return;
|
| 546 |
newmaplen = vmaplen + nvals; /* allocate new map */
|
| 547 |
newmap = (int *)malloc(newmaplen*sizeof(int));
|
| 548 |
if (newmap == NULL)
|
| 549 |
error(SYSTEM, "out of memory in setalphas");
|
| 550 |
while (nvals--) { /* add new values to end */
|
| 551 |
rV.alpha[vbeg] = 255;
|
| 552 |
newmap[vmaplen+nvals] = vbeg++;
|
| 553 |
}
|
| 554 |
if (nvals >= 3*vmaplen) { /* resort the combined array */
|
| 555 |
while (vmaplen--)
|
| 556 |
newmap[vmaplen] = valmap[vmaplen];
|
| 557 |
qsort((char *)newmap, newmaplen, sizeof(int), valcmp);
|
| 558 |
} else { /* perform merge sort */
|
| 559 |
qsort((char *)(newmap+vmaplen), newmaplen-vmaplen,
|
| 560 |
sizeof(int), valcmp);
|
| 561 |
mergalphas(newmap, valmap, vmaplen,
|
| 562 |
newmap+vmaplen, newmaplen-vmaplen);
|
| 563 |
}
|
| 564 |
if (valmap != NULL) /* free old map and assign new one */
|
| 565 |
free((char *)valmap);
|
| 566 |
valmap = newmap;
|
| 567 |
vmaplen = newmaplen;
|
| 568 |
lastalpha = 0; /* set new alpha values */
|
| 569 |
ccmp[0] = ccmp[1] = ccmp[2] = 256;
|
| 570 |
while (newmaplen--)
|
| 571 |
if (rV.rgb[*newmap][0] == ccmp[0] &&
|
| 572 |
rV.rgb[*newmap][1] == ccmp[1] &&
|
| 573 |
rV.rgb[*newmap][2] == ccmp[2]) {
|
| 574 |
if (lastalpha >= 255)
|
| 575 |
newmap++;
|
| 576 |
else if (rV.alpha[*newmap] < 255)
|
| 577 |
lastalpha = rV.alpha[*newmap++];
|
| 578 |
else
|
| 579 |
rV.alpha[*newmap++] = ++lastalpha;
|
| 580 |
} else {
|
| 581 |
ccmp[0] = rV.rgb[*newmap][0];
|
| 582 |
ccmp[1] = rV.rgb[*newmap][1];
|
| 583 |
ccmp[2] = rV.rgb[*newmap][2];
|
| 584 |
if (rV.alpha[*newmap] < 255)
|
| 585 |
lastalpha = rV.alpha[*newmap++];
|
| 586 |
else
|
| 587 |
rV.alpha[*newmap++] = lastalpha = 1;
|
| 588 |
}
|
| 589 |
}
|
| 590 |
|
| 591 |
|
| 592 |
static
|
| 593 |
TMapValues(redo) /* map our values to RGB */
|
| 594 |
int redo;
|
| 595 |
{
|
| 596 |
int aorg, alen, borg, blen;
|
| 597 |
/* recompute mapping? */
|
| 598 |
if (redo)
|
| 599 |
rV.tml = rV.bl;
|
| 600 |
/* already done? */
|
| 601 |
if (rV.tml == rV.tl)
|
| 602 |
return(1);
|
| 603 |
/* compute segments */
|
| 604 |
aorg = rV.tml;
|
| 605 |
if (rV.tl >= aorg) {
|
| 606 |
alen = rV.tl - aorg;
|
| 607 |
blen = 0;
|
| 608 |
} else {
|
| 609 |
alen = rV.nl - aorg;
|
| 610 |
borg = 0;
|
| 611 |
blen = rV.tl;
|
| 612 |
}
|
| 613 |
/* (re)compute tone mapping? */
|
| 614 |
if (rV.tml == rV.bl) {
|
| 615 |
tmClearHisto();
|
| 616 |
tmAddHisto(rV.brt+aorg, alen, 1);
|
| 617 |
if (blen > 0)
|
| 618 |
tmAddHisto(rV.brt+borg, blen, 1);
|
| 619 |
if (tmComputeMapping(0., 0., 0.) != TM_E_OK)
|
| 620 |
return(0);
|
| 621 |
clralphas(); /* restart value list */
|
| 622 |
rV.drl = rV.bl; /* need to redraw */
|
| 623 |
}
|
| 624 |
if (tmMapPixels(rV.rgb+aorg, rV.brt+aorg,
|
| 625 |
rV.chr+aorg, alen) != TM_E_OK)
|
| 626 |
return(0);
|
| 627 |
if (blen > 0)
|
| 628 |
tmMapPixels(rV.rgb+borg, rV.brt+borg,
|
| 629 |
rV.chr+borg, blen);
|
| 630 |
setalphas(aorg, alen); /* compute add'l alpha values */
|
| 631 |
if (blen > 0)
|
| 632 |
setalphas(borg, blen);
|
| 633 |
rV.tml = rV.tl; /* we're all up to date */
|
| 634 |
return(1);
|
| 635 |
}
|
| 636 |
|
| 637 |
|
| 638 |
static int
|
| 639 |
Compost(pct) /* free up some values */
|
| 640 |
int pct;
|
| 641 |
{
|
| 642 |
int nused, nclear, nmapped, ndrawn;
|
| 643 |
/* figure out how many values to clear */
|
| 644 |
nclear = rV.nl * pct / 100;
|
| 645 |
nused = rV.tl - rV.bl;
|
| 646 |
if (nused <= 0) nused += rV.nl;
|
| 647 |
nclear -= rV.nl - nused;
|
| 648 |
if (nclear <= 0)
|
| 649 |
return(0);
|
| 650 |
if (nclear >= nused) { /* clear them all? */
|
| 651 |
rV.drl = rV.tml = rV.bl = rV.tl = 0;
|
| 652 |
return(nused);
|
| 653 |
}
|
| 654 |
/* else clear values from bottom */
|
| 655 |
ndrawn = rV.drl - rV.bl;
|
| 656 |
if (ndrawn < 0) ndrawn += rV.nl;
|
| 657 |
nmapped = rV.tml - rV.bl;
|
| 658 |
if (nmapped < 0) nmapped += rV.nl;
|
| 659 |
rV.bl += nclear;
|
| 660 |
if (rV.bl >= rV.nl) rV.bl -= rV.nl;
|
| 661 |
if (ndrawn < nclear) rV.drl = rV.bl;
|
| 662 |
if (nmapped < nclear) rV.tml = rV.bl;
|
| 663 |
return(nclear);
|
| 664 |
}
|
| 665 |
|
| 666 |
|
| 667 |
static
|
| 668 |
getevent() /* get next event */
|
| 669 |
{
|
| 670 |
XNextEvent(ourdisplay, levptr(XEvent));
|
| 671 |
switch (levptr(XEvent)->type) {
|
| 672 |
case ConfigureNotify:
|
| 673 |
resizewindow(levptr(XConfigureEvent));
|
| 674 |
break;
|
| 675 |
case UnmapNotify:
|
| 676 |
mapped = 0;
|
| 677 |
break;
|
| 678 |
case MapNotify:
|
| 679 |
mapped = 1;
|
| 680 |
break;
|
| 681 |
case Expose:
|
| 682 |
fixwindow(levptr(XExposeEvent));
|
| 683 |
break;
|
| 684 |
case KeyPress:
|
| 685 |
getkey(levptr(XKeyPressedEvent));
|
| 686 |
break;
|
| 687 |
case ButtonPress:
|
| 688 |
getmove(levptr(XButtonPressedEvent));
|
| 689 |
break;
|
| 690 |
}
|
| 691 |
}
|
| 692 |
|
| 693 |
|
| 694 |
static
|
| 695 |
draw3dline(wp) /* draw 3d line in world coordinates */
|
| 696 |
register FVECT wp[2];
|
| 697 |
{
|
| 698 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]);
|
| 699 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]);
|
| 700 |
}
|
| 701 |
|
| 702 |
|
| 703 |
static
|
| 704 |
draw_grids() /* draw holodeck section grids */
|
| 705 |
{
|
| 706 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00};
|
| 707 |
|
| 708 |
if (!mapped)
|
| 709 |
return;
|
| 710 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]);
|
| 711 |
/* draw each grid line */
|
| 712 |
glBegin(GL_LINES);
|
| 713 |
gridlines(draw3dline);
|
| 714 |
glEnd();
|
| 715 |
}
|
| 716 |
|
| 717 |
|
| 718 |
static int
|
| 719 |
IndexValue(rgba) /* locate a pixel by it's framebuffer value */
|
| 720 |
register BYTE rgba[4];
|
| 721 |
{
|
| 722 |
register int *vp;
|
| 723 |
/* check legality */
|
| 724 |
if (rgba[3] == 0 || rgba[3] == 255)
|
| 725 |
return(-1);
|
| 726 |
/* borrow a value slot */
|
| 727 |
rV.rgb[rV.tl][0] = rgba[0];
|
| 728 |
rV.rgb[rV.tl][1] = rgba[1];
|
| 729 |
rV.rgb[rV.tl][2] = rgba[2];
|
| 730 |
rV.alpha[rV.tl] = rgba[3];
|
| 731 |
/* find it */
|
| 732 |
vp = (int *)bsearch((char *)&rV.tl, (char *)valmap, vmaplen,
|
| 733 |
sizeof(int), valcmp);
|
| 734 |
if (vp == NULL)
|
| 735 |
return(-1);
|
| 736 |
return(*vp);
|
| 737 |
}
|
| 738 |
|
| 739 |
|
| 740 |
static int
|
| 741 |
FindValue(dx, dy) /* find a value on the display */
|
| 742 |
int dx, dy;
|
| 743 |
{
|
| 744 |
BYTE rgba[4];
|
| 745 |
|
| 746 |
if (dx < 0 || dy < 0 || dx >= odev.hres || dy >= odev.vres)
|
| 747 |
return(-1);
|
| 748 |
glReadPixels(dx, dy, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, rgba);
|
| 749 |
return(IndexValue(rgba));
|
| 750 |
}
|
| 751 |
|
| 752 |
|
| 753 |
static
|
| 754 |
moveview(dx, dy, mov, orb) /* move our view */
|
| 755 |
int dx, dy, mov, orb;
|
| 756 |
{
|
| 757 |
VIEW nv;
|
| 758 |
FVECT odir, v1;
|
| 759 |
double d;
|
| 760 |
register int li;
|
| 761 |
/* start with old view */
|
| 762 |
copystruct(&nv, &odev.v);
|
| 763 |
/* change view direction */
|
| 764 |
if (mov | orb) {
|
| 765 |
if ((li = FindValue(dx, dy)) < 0)
|
| 766 |
return(0); /* not on window */
|
| 767 |
VSUM(odir, rV.wp[li], nv.vp, -1.);
|
| 768 |
} else {
|
| 769 |
if (viewray(nv.vp, nv.vdir, &odev.v,
|
| 770 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
|
| 771 |
return(0); /* outside view */
|
| 772 |
}
|
| 773 |
if (orb && mov) { /* orbit left/right */
|
| 774 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
|
| 775 |
VSUM(nv.vp, rV.wp[li], odir, -1.);
|
| 776 |
spinvector(nv.vdir, nv.vdir, nv.vup, d);
|
| 777 |
} else if (orb) { /* orbit up/down */
|
| 778 |
fcross(v1, odir, nv.vup);
|
| 779 |
if (normalize(v1) == 0.)
|
| 780 |
return(0);
|
| 781 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
|
| 782 |
VSUM(nv.vp, rV.wp[li], odir, -1.);
|
| 783 |
spinvector(nv.vdir, nv.vdir, v1, d);
|
| 784 |
} else if (mov) { /* move forward/backward */
|
| 785 |
d = MOVPCT/100. * mov;
|
| 786 |
VSUM(nv.vp, nv.vp, odir, d);
|
| 787 |
}
|
| 788 |
if (!mov ^ !orb && headlocked) { /* restore head height */
|
| 789 |
VSUM(v1, odev.v.vp, nv.vp, -1.);
|
| 790 |
d = DOT(v1, odev.v.vup);
|
| 791 |
VSUM(nv.vp, nv.vp, odev.v.vup, d);
|
| 792 |
}
|
| 793 |
if (setview(&nv) != NULL)
|
| 794 |
return(0); /* illegal view */
|
| 795 |
dev_view(&nv);
|
| 796 |
inpresflags |= DFL(DC_SETVIEW);
|
| 797 |
return(1);
|
| 798 |
}
|
| 799 |
|
| 800 |
|
| 801 |
static
|
| 802 |
getmove(ebut) /* get view change */
|
| 803 |
XButtonPressedEvent *ebut;
|
| 804 |
{
|
| 805 |
int movdir = MOVDIR(ebut->button);
|
| 806 |
int movorb = MOVORB(ebut->state);
|
| 807 |
Window rootw, childw;
|
| 808 |
int rootx, rooty, wx, wy;
|
| 809 |
unsigned int statemask;
|
| 810 |
|
| 811 |
XNoOp(ourdisplay);
|
| 812 |
|
| 813 |
while (!XCheckMaskEvent(ourdisplay,
|
| 814 |
ButtonReleaseMask, levptr(XEvent))) {
|
| 815 |
|
| 816 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
|
| 817 |
&rootx, &rooty, &wx, &wy, &statemask))
|
| 818 |
break; /* on another screen */
|
| 819 |
|
| 820 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
|
| 821 |
sleep(1);
|
| 822 |
continue;
|
| 823 |
}
|
| 824 |
draw_grids();
|
| 825 |
dev_flush();
|
| 826 |
}
|
| 827 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
|
| 828 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
|
| 829 |
wx = levptr(XButtonReleasedEvent)->x;
|
| 830 |
wy = levptr(XButtonReleasedEvent)->y;
|
| 831 |
moveview(wx, odev.vres-1-wy, movdir, movorb);
|
| 832 |
} else {
|
| 833 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
| 834 |
redraw();
|
| 835 |
}
|
| 836 |
dev_flush();
|
| 837 |
}
|
| 838 |
|
| 839 |
|
| 840 |
static
|
| 841 |
getkey(ekey) /* get input key */
|
| 842 |
register XKeyPressedEvent *ekey;
|
| 843 |
{
|
| 844 |
int n;
|
| 845 |
char buf[8];
|
| 846 |
|
| 847 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
|
| 848 |
if (n != 1)
|
| 849 |
return;
|
| 850 |
switch (buf[0]) {
|
| 851 |
case 'h': /* turn on height motion lock */
|
| 852 |
headlocked = 1;
|
| 853 |
return;
|
| 854 |
case 'H': /* turn off height motion lock */
|
| 855 |
headlocked = 0;
|
| 856 |
return;
|
| 857 |
case 'l': /* retrieve last view */
|
| 858 |
inpresflags |= DFL(DC_LASTVIEW);
|
| 859 |
return;
|
| 860 |
case 'p': /* pause computation */
|
| 861 |
inpresflags |= DFL(DC_PAUSE);
|
| 862 |
return;
|
| 863 |
case 'v': /* spit out view */
|
| 864 |
inpresflags |= DFL(DC_GETVIEW);
|
| 865 |
return;
|
| 866 |
case '\n':
|
| 867 |
case '\r': /* resume computation */
|
| 868 |
inpresflags |= DFL(DC_RESUME);
|
| 869 |
return;
|
| 870 |
case CTRL('R'): /* redraw screen */
|
| 871 |
TMapValues(1);
|
| 872 |
glClear(GL_DEPTH_BUFFER_BIT);
|
| 873 |
redraw();
|
| 874 |
return;
|
| 875 |
case CTRL('L'): /* refresh from server */
|
| 876 |
if (inpresflags & DFL(DC_REDRAW))
|
| 877 |
return;
|
| 878 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
| 879 |
glDisable(GL_DEPTH_TEST);
|
| 880 |
draw_grids();
|
| 881 |
glEnable(GL_DEPTH_TEST);
|
| 882 |
glFlush();
|
| 883 |
Compost(100); /* get rid of old values */
|
| 884 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */
|
| 885 |
return;
|
| 886 |
case 'K': /* kill rtrace process(es) */
|
| 887 |
inpresflags |= DFL(DC_KILL);
|
| 888 |
break;
|
| 889 |
case 'R': /* restart rtrace */
|
| 890 |
inpresflags |= DFL(DC_RESTART);
|
| 891 |
break;
|
| 892 |
case 'C': /* clobber holodeck */
|
| 893 |
inpresflags |= DFL(DC_CLOBBER);
|
| 894 |
break;
|
| 895 |
case 'q': /* quit the program */
|
| 896 |
inpresflags |= DFL(DC_QUIT);
|
| 897 |
return;
|
| 898 |
default:
|
| 899 |
XBell(ourdisplay, 0);
|
| 900 |
return;
|
| 901 |
}
|
| 902 |
}
|
| 903 |
|
| 904 |
|
| 905 |
static
|
| 906 |
fixwindow(eexp) /* repair damage to window */
|
| 907 |
register XExposeEvent *eexp;
|
| 908 |
{
|
| 909 |
if (odev.hres == 0 || odev.vres == 0) /* first exposure */
|
| 910 |
resizewindow((XConfigureEvent *)eexp);
|
| 911 |
if (eexp->width == odev.hres && eexp->height == odev.vres)
|
| 912 |
TMapValues(1);
|
| 913 |
if (!eexp->count) {
|
| 914 |
glClear(GL_DEPTH_BUFFER_BIT);
|
| 915 |
redraw();
|
| 916 |
}
|
| 917 |
}
|
| 918 |
|
| 919 |
|
| 920 |
static
|
| 921 |
resizewindow(ersz) /* resize window */
|
| 922 |
register XConfigureEvent *ersz;
|
| 923 |
{
|
| 924 |
if (ersz->width == odev.hres && ersz->height == odev.vres)
|
| 925 |
return;
|
| 926 |
|
| 927 |
odev.hres = ersz->width;
|
| 928 |
odev.vres = ersz->height;
|
| 929 |
|
| 930 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
|
| 931 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
|
| 932 |
|
| 933 |
setGLview();
|
| 934 |
|
| 935 |
inpresflags |= DFL(DC_SETVIEW);
|
| 936 |
}
|
