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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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|
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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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/* |
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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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|
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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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|
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#include <GL/glx.h> |
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|
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#include "x11icon.h" |
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|
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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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|
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#ifndef int4 |
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#define int4 int |
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#endif |
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|
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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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|
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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 3. /* cone height (fraction of depth) */ |
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#endif |
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#ifndef CONEW |
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#define CONEW 0.05 /* 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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#ifndef VALUA |
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#define VALUA 16 /* target value area (pixels) */ |
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#endif |
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|
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#define GAMMA 1.4 /* default gamma correction */ |
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|
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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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|
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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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|
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
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|
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#define BORWIDTH 5 /* border width */ |
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|
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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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|
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#define levptr(etype) ((etype *)¤tevent) |
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|
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struct driver odev; /* global device driver structure */ |
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|
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static XEvent currentevent; /* current event */ |
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|
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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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|
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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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|
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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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|
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
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static FVECT conev[NCONEV]; /* drawing cone */ |
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static double coneh; /* cone height */ |
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|
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static int inpresflags; /* input result flags */ |
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|
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static int headlocked = 0; /* lock vertical motion */ |
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|
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static int quicken = 0; /* quicker, sloppier update rate? */ |
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|
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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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|
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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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|
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#define redraw() (rV.drl = rV.bl) |
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|
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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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|
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extern int4 encodedir(); |
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extern double fdir2diff(), dir2diff(); |
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|
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|
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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) / VALUA)) |
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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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|
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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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|
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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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|
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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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|
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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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|
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do |
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getevent(); |
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|
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while (XQLength(ourdisplay) > 0); |
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|
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return(inpresflags); |
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} |
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|
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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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|
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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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|
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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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|
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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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|
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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 */ |
| 338 |
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; |
| 353 |
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); |
| 370 |
/* initialize cone for Vornoi polys */ |
| 371 |
coneh = CONEH*(zmax - zmin); |
| 372 |
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; |
| 377 |
vy[i] = 1.; |
| 378 |
fcross(vx, vy, odev.v.vdir); |
| 379 |
normalize(vx); |
| 380 |
fcross(vy, odev.v.vdir, vx); |
| 381 |
for (j = 0, d = 0.; j < NCONEV; j++, d += 2.*PI/NCONEV) { |
| 382 |
cx = crad*cos(d); sx = crad*sin(d); |
| 383 |
for (i = 0; i < 3; i++) |
| 384 |
conev[j][i] = coneh*odev.v.vdir[i] + |
| 385 |
cx*vx[i] + sx*vy[i]; |
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
|
| 390 |
#define SUCCSTEP 8 /* skip step when successful */ |
| 391 |
#define MAXSTEP 64 |
| 392 |
|
| 393 |
static |
| 394 |
drawvalue(li) /* draw a pixel value as a cone */ |
| 395 |
register int li; |
| 396 |
{ |
| 397 |
static int skipstep = 1; |
| 398 |
static FVECT disp; |
| 399 |
FVECT apex; |
| 400 |
double d, dorg, dnew, h, v; |
| 401 |
register int i; |
| 402 |
/* check for quicker update */ |
| 403 |
if (quicken) { |
| 404 |
if (li % skipstep) |
| 405 |
return; |
| 406 |
if (skipstep < MAXSTEP) |
| 407 |
skipstep++; |
| 408 |
} |
| 409 |
/* compute cone coordinates */ |
| 410 |
disp[0] = rV.wp[li][0] - odev.v.vp[0]; |
| 411 |
disp[1] = rV.wp[li][1] - odev.v.vp[1]; |
| 412 |
disp[2] = rV.wp[li][2] - odev.v.vp[2]; |
| 413 |
dorg = DOT(disp,odev.v.vdir); |
| 414 |
if (dorg <= odev.v.vfore) |
| 415 |
return; /* clipped too near */ |
| 416 |
if (odev.v.vaft > FTINY && dorg > odev.v.vaft) |
| 417 |
return; /* clipped too far */ |
| 418 |
if (dorg > 1e5) { /* background pixel */ |
| 419 |
dnew = maxdepth; |
| 420 |
d = dnew/dorg; |
| 421 |
dorg = maxdepth; |
| 422 |
} else { /* foreground pixel, compute penalty */ |
| 423 |
normalize(disp); |
| 424 |
d = dnew = dorg + coneh*fdir2diff(rV.wd[li],disp)*DIRPEN; |
| 425 |
} |
| 426 |
/* compute adjusted apex position */ |
| 427 |
disp[0] *= d; disp[1] *= d; disp[2] *= d; |
| 428 |
apex[0] = odev.v.vp[0] + disp[0]; |
| 429 |
apex[1] = odev.v.vp[1] + disp[1]; |
| 430 |
apex[2] = odev.v.vp[2] + disp[2]; |
| 431 |
/* compute view position and base offset */ |
| 432 |
h = DOT(disp,odev.v.hvec)/(dnew*odev.v.hn2); |
| 433 |
v = DOT(disp,odev.v.vvec)/(dnew*odev.v.vn2); |
| 434 |
if (fabs(h - odev.v.hoff) > 0.5 || fabs(v - odev.v.voff) > 0.5) |
| 435 |
return; /* clipped off screen */ |
| 436 |
if (dorg < mindepth) |
| 437 |
mindepth = dorg; |
| 438 |
if (dorg > maxdepth) |
| 439 |
maxdepth = dorg; |
| 440 |
for (i = 0; i < 3; i++) |
| 441 |
disp[i] = apex[i] + coneh*(h*odev.v.hvec[i] + v*odev.v.vvec[i]); |
| 442 |
/* draw cone (pyramid approx.) */ |
| 443 |
glColor4ub(rV.rgb[li][0], rV.rgb[li][1], rV.rgb[li][2], rV.alpha[li]); |
| 444 |
glBegin(GL_TRIANGLE_FAN); |
| 445 |
glVertex3f(apex[0], apex[1], apex[2]); |
| 446 |
for (i = 0; i < NCONEV; i++) |
| 447 |
glVertex3d(conev[i][0] + disp[0], conev[i][1] + disp[1], |
| 448 |
conev[i][2] + disp[2]); |
| 449 |
/* connect last face to first */ |
| 450 |
glVertex3d(conev[0][0] + disp[0], conev[0][1] + disp[1], |
| 451 |
conev[0][2] + disp[2]); |
| 452 |
glEnd(); /* done */ |
| 453 |
skipstep = SUCCSTEP; |
| 454 |
} |
| 455 |
|
| 456 |
#undef SUCCSTEP |
| 457 |
#undef MAXSTEP |
| 458 |
|
| 459 |
|
| 460 |
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
| 461 |
sizeof(TMbright)+7*sizeof(BYTE)) |
| 462 |
|
| 463 |
static |
| 464 |
AllocValues(n) /* allocate space for n values */ |
| 465 |
register int n; |
| 466 |
{ |
| 467 |
unsigned nbytes; |
| 468 |
register unsigned i; |
| 469 |
|
| 470 |
if (n <= 0) |
| 471 |
return(0); |
| 472 |
if (rV.nl >= n) |
| 473 |
return(rV.nl); |
| 474 |
else if (rV.nl > 0) |
| 475 |
free(rV.base); |
| 476 |
/* round space up to nearest power of 2 */ |
| 477 |
nbytes = n*LEAFSIZ + 8; |
| 478 |
for (i = 1024; nbytes > i; i <<= 1) |
| 479 |
; |
| 480 |
n = (i - 8) / LEAFSIZ; /* should we make sure n is even? */ |
| 481 |
rV.base = (char *)malloc(n*LEAFSIZ); |
| 482 |
if (rV.base == NULL) |
| 483 |
return(0); |
| 484 |
/* assign larger alignment types earlier */ |
| 485 |
rV.wp = (float (*)[3])rV.base; |
| 486 |
rV.wd = (int4 *)(rV.wp + n); |
| 487 |
rV.brt = (TMbright *)(rV.wd + n); |
| 488 |
rV.chr = (BYTE (*)[3])(rV.brt + n); |
| 489 |
rV.rgb = (BYTE (*)[3])(rV.chr + n); |
| 490 |
rV.alpha = (BYTE *)(rV.rgb + n); |
| 491 |
rV.nl = n; |
| 492 |
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
| 493 |
return(n); |
| 494 |
} |
| 495 |
|
| 496 |
#undef LEAFSIZ |
| 497 |
|
| 498 |
|
| 499 |
static |
| 500 |
FreeValues() /* free our allocated values */ |
| 501 |
{ |
| 502 |
if (rV.nl <= 0) |
| 503 |
return; |
| 504 |
free(rV.base); |
| 505 |
rV.base = NULL; |
| 506 |
rV.nl = 0; |
| 507 |
} |
| 508 |
|
| 509 |
|
| 510 |
static |
| 511 |
clralphas() /* prepare for new alpha values */ |
| 512 |
{ |
| 513 |
if (!vmaplen) |
| 514 |
return; |
| 515 |
free((char *)valmap); |
| 516 |
valmap = NULL; |
| 517 |
vmaplen = 0; |
| 518 |
} |
| 519 |
|
| 520 |
|
| 521 |
static int |
| 522 |
valcmp(v1p, v2p) /* compare two pixel values */ |
| 523 |
int *v1p, *v2p; |
| 524 |
{ |
| 525 |
register int v1 = *v1p, v2 = *v2p; |
| 526 |
register int c; |
| 527 |
|
| 528 |
if ((c = rV.rgb[v1][0] - rV.rgb[v2][0])) return(c); |
| 529 |
if ((c = rV.rgb[v1][1] - rV.rgb[v2][1])) return(c); |
| 530 |
if ((c = rV.rgb[v1][2] - rV.rgb[v2][2])) return(c); |
| 531 |
return(rV.alpha[v1] - rV.alpha[v2]); |
| 532 |
} |
| 533 |
|
| 534 |
|
| 535 |
static |
| 536 |
mergalphas(adest, al1, n1, al2, n2) /* merge two sorted alpha lists */ |
| 537 |
register int *adest, *al1, *al2; |
| 538 |
int n1, n2; |
| 539 |
{ |
| 540 |
register int cmp; |
| 541 |
|
| 542 |
while (n1 | n2) { |
| 543 |
if (!n1) cmp = 1; |
| 544 |
else if (!n2) cmp = -1; |
| 545 |
else cmp = valcmp(al1, al2); |
| 546 |
if (cmp > 0) { |
| 547 |
*adest++ = *al2++; |
| 548 |
n2--; |
| 549 |
} else { |
| 550 |
*adest++ = *al1++; |
| 551 |
n1--; |
| 552 |
} |
| 553 |
} |
| 554 |
} |
| 555 |
|
| 556 |
|
| 557 |
static |
| 558 |
setalphas(vbeg, nvals) /* add values to our map and set alphas */ |
| 559 |
int vbeg, nvals; |
| 560 |
{ |
| 561 |
register int *newmap; |
| 562 |
short ccmp[3], lastalpha; |
| 563 |
int newmaplen; |
| 564 |
|
| 565 |
if (nvals <= 0) |
| 566 |
return; |
| 567 |
newmaplen = vmaplen + nvals; /* allocate new map */ |
| 568 |
newmap = (int *)malloc(newmaplen*sizeof(int)); |
| 569 |
if (newmap == NULL) |
| 570 |
error(SYSTEM, "out of memory in setalphas"); |
| 571 |
while (nvals--) { /* add new values to end */ |
| 572 |
rV.alpha[vbeg] = 255; |
| 573 |
newmap[vmaplen+nvals] = vbeg++; |
| 574 |
} |
| 575 |
if (nvals >= 3*vmaplen) { /* resort the combined array */ |
| 576 |
while (vmaplen--) |
| 577 |
newmap[vmaplen] = valmap[vmaplen]; |
| 578 |
qsort((char *)newmap, newmaplen, sizeof(int), valcmp); |
| 579 |
} else { /* perform merge sort */ |
| 580 |
qsort((char *)(newmap+vmaplen), newmaplen-vmaplen, |
| 581 |
sizeof(int), valcmp); |
| 582 |
mergalphas(newmap, valmap, vmaplen, |
| 583 |
newmap+vmaplen, newmaplen-vmaplen); |
| 584 |
} |
| 585 |
if (valmap != NULL) /* free old map and assign new one */ |
| 586 |
free((char *)valmap); |
| 587 |
valmap = newmap; |
| 588 |
vmaplen = newmaplen; |
| 589 |
lastalpha = 0; /* set new alpha values */ |
| 590 |
ccmp[0] = ccmp[1] = ccmp[2] = 256; |
| 591 |
while (newmaplen--) |
| 592 |
if (rV.rgb[*newmap][0] == ccmp[0] && |
| 593 |
rV.rgb[*newmap][1] == ccmp[1] && |
| 594 |
rV.rgb[*newmap][2] == ccmp[2]) { |
| 595 |
if (lastalpha >= 255) |
| 596 |
newmap++; |
| 597 |
else if (rV.alpha[*newmap] < 255) |
| 598 |
lastalpha = rV.alpha[*newmap++]; |
| 599 |
else |
| 600 |
rV.alpha[*newmap++] = ++lastalpha; |
| 601 |
} else { |
| 602 |
ccmp[0] = rV.rgb[*newmap][0]; |
| 603 |
ccmp[1] = rV.rgb[*newmap][1]; |
| 604 |
ccmp[2] = rV.rgb[*newmap][2]; |
| 605 |
if (rV.alpha[*newmap] < 255) |
| 606 |
lastalpha = rV.alpha[*newmap++]; |
| 607 |
else |
| 608 |
rV.alpha[*newmap++] = lastalpha = 1; |
| 609 |
} |
| 610 |
} |
| 611 |
|
| 612 |
|
| 613 |
static |
| 614 |
TMapValues(redo) /* map our values to RGB */ |
| 615 |
int redo; |
| 616 |
{ |
| 617 |
int aorg, alen, borg, blen; |
| 618 |
/* recompute mapping? */ |
| 619 |
if (redo) |
| 620 |
rV.tml = rV.bl; |
| 621 |
/* already done? */ |
| 622 |
if (rV.tml == rV.tl) |
| 623 |
return(1); |
| 624 |
/* compute segments */ |
| 625 |
aorg = rV.tml; |
| 626 |
if (rV.tl >= aorg) { |
| 627 |
alen = rV.tl - aorg; |
| 628 |
blen = 0; |
| 629 |
} else { |
| 630 |
alen = rV.nl - aorg; |
| 631 |
borg = 0; |
| 632 |
blen = rV.tl; |
| 633 |
} |
| 634 |
/* (re)compute tone mapping? */ |
| 635 |
if (rV.tml == rV.bl) { |
| 636 |
tmClearHisto(); |
| 637 |
tmAddHisto(rV.brt+aorg, alen, 1); |
| 638 |
if (blen > 0) |
| 639 |
tmAddHisto(rV.brt+borg, blen, 1); |
| 640 |
if (tmComputeMapping(0., 0., 0.) != TM_E_OK) |
| 641 |
return(0); |
| 642 |
clralphas(); /* restart value list */ |
| 643 |
rV.drl = rV.bl; /* need to redraw */ |
| 644 |
} |
| 645 |
if (tmMapPixels(rV.rgb+aorg, rV.brt+aorg, |
| 646 |
rV.chr+aorg, alen) != TM_E_OK) |
| 647 |
return(0); |
| 648 |
if (blen > 0) |
| 649 |
tmMapPixels(rV.rgb+borg, rV.brt+borg, |
| 650 |
rV.chr+borg, blen); |
| 651 |
setalphas(aorg, alen); /* compute add'l alpha values */ |
| 652 |
if (blen > 0) |
| 653 |
setalphas(borg, blen); |
| 654 |
rV.tml = rV.tl; /* we're all up to date */ |
| 655 |
return(1); |
| 656 |
} |
| 657 |
|
| 658 |
|
| 659 |
static int |
| 660 |
Compost(pct) /* free up some values */ |
| 661 |
int pct; |
| 662 |
{ |
| 663 |
int nused, nclear, nmapped, ndrawn; |
| 664 |
/* figure out how many values to clear */ |
| 665 |
nclear = rV.nl * pct / 100; |
| 666 |
nused = rV.tl - rV.bl; |
| 667 |
if (nused <= 0) nused += rV.nl; |
| 668 |
nclear -= rV.nl - nused; |
| 669 |
if (nclear <= 0) |
| 670 |
return(0); |
| 671 |
if (nclear >= nused) { /* clear them all? */ |
| 672 |
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
| 673 |
return(nused); |
| 674 |
} |
| 675 |
/* else clear values from bottom */ |
| 676 |
ndrawn = rV.drl - rV.bl; |
| 677 |
if (ndrawn < 0) ndrawn += rV.nl; |
| 678 |
nmapped = rV.tml - rV.bl; |
| 679 |
if (nmapped < 0) nmapped += rV.nl; |
| 680 |
rV.bl += nclear; |
| 681 |
if (rV.bl >= rV.nl) rV.bl -= rV.nl; |
| 682 |
if (ndrawn < nclear) rV.drl = rV.bl; |
| 683 |
if (nmapped < nclear) rV.tml = rV.bl; |
| 684 |
return(nclear); |
| 685 |
} |
| 686 |
|
| 687 |
|
| 688 |
static |
| 689 |
getevent() /* get next event */ |
| 690 |
{ |
| 691 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 692 |
switch (levptr(XEvent)->type) { |
| 693 |
case ConfigureNotify: |
| 694 |
resizewindow(levptr(XConfigureEvent)); |
| 695 |
break; |
| 696 |
case UnmapNotify: |
| 697 |
mapped = 0; |
| 698 |
break; |
| 699 |
case MapNotify: |
| 700 |
mapped = 1; |
| 701 |
break; |
| 702 |
case Expose: |
| 703 |
fixwindow(levptr(XExposeEvent)); |
| 704 |
break; |
| 705 |
case KeyPress: |
| 706 |
getkey(levptr(XKeyPressedEvent)); |
| 707 |
break; |
| 708 |
case ButtonPress: |
| 709 |
getmove(levptr(XButtonPressedEvent)); |
| 710 |
break; |
| 711 |
} |
| 712 |
} |
| 713 |
|
| 714 |
|
| 715 |
static |
| 716 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 717 |
register FVECT wp[2]; |
| 718 |
{ |
| 719 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 720 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 721 |
} |
| 722 |
|
| 723 |
|
| 724 |
static |
| 725 |
draw_grids() /* draw holodeck section grids */ |
| 726 |
{ |
| 727 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
| 728 |
|
| 729 |
if (!mapped) |
| 730 |
return; |
| 731 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
| 732 |
/* draw each grid line */ |
| 733 |
glBegin(GL_LINES); |
| 734 |
gridlines(draw3dline); |
| 735 |
glEnd(); |
| 736 |
} |
| 737 |
|
| 738 |
|
| 739 |
static int |
| 740 |
IndexValue(rgba) /* locate a pixel by it's framebuffer value */ |
| 741 |
register BYTE rgba[4]; |
| 742 |
{ |
| 743 |
register int *vp; |
| 744 |
/* check legality */ |
| 745 |
if (rgba[3] == 0 || rgba[3] == 255) |
| 746 |
return(-1); |
| 747 |
/* borrow a value slot */ |
| 748 |
rV.rgb[rV.tl][0] = rgba[0]; |
| 749 |
rV.rgb[rV.tl][1] = rgba[1]; |
| 750 |
rV.rgb[rV.tl][2] = rgba[2]; |
| 751 |
rV.alpha[rV.tl] = rgba[3]; |
| 752 |
/* find it */ |
| 753 |
vp = (int *)bsearch((char *)&rV.tl, (char *)valmap, vmaplen, |
| 754 |
sizeof(int), valcmp); |
| 755 |
if (vp == NULL) |
| 756 |
return(-1); |
| 757 |
return(*vp); |
| 758 |
} |
| 759 |
|
| 760 |
|
| 761 |
static int |
| 762 |
FindValue(dx, dy) /* find a value on the display */ |
| 763 |
int dx, dy; |
| 764 |
{ |
| 765 |
BYTE rgba[4]; |
| 766 |
|
| 767 |
if (dx < 0 || dy < 0 || dx >= odev.hres || dy >= odev.vres) |
| 768 |
return(-1); |
| 769 |
glReadPixels(dx, dy, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, rgba); |
| 770 |
return(IndexValue(rgba)); |
| 771 |
} |
| 772 |
|
| 773 |
|
| 774 |
static |
| 775 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 776 |
int dx, dy, mov, orb; |
| 777 |
{ |
| 778 |
VIEW nv; |
| 779 |
FVECT odir, v1; |
| 780 |
double d; |
| 781 |
register int li; |
| 782 |
/* start with old view */ |
| 783 |
copystruct(&nv, &odev.v); |
| 784 |
/* change view direction */ |
| 785 |
if (mov | orb) { |
| 786 |
if ((li = FindValue(dx, dy)) < 0) |
| 787 |
return(0); /* not on window */ |
| 788 |
VSUM(odir, rV.wp[li], nv.vp, -1.); |
| 789 |
} else { |
| 790 |
if (viewray(nv.vp, nv.vdir, &odev.v, |
| 791 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 792 |
return(0); /* outside view */ |
| 793 |
} |
| 794 |
if (orb && mov) { /* orbit left/right */ |
| 795 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 796 |
VSUM(nv.vp, rV.wp[li], odir, -1.); |
| 797 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 798 |
} else if (orb) { /* orbit up/down */ |
| 799 |
fcross(v1, odir, nv.vup); |
| 800 |
if (normalize(v1) == 0.) |
| 801 |
return(0); |
| 802 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 803 |
VSUM(nv.vp, rV.wp[li], odir, -1.); |
| 804 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 805 |
} else if (mov) { /* move forward/backward */ |
| 806 |
d = MOVPCT/100. * mov; |
| 807 |
VSUM(nv.vp, nv.vp, odir, d); |
| 808 |
} |
| 809 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 810 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 811 |
d = DOT(v1, odev.v.vup); |
| 812 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 813 |
} |
| 814 |
if (setview(&nv) != NULL) |
| 815 |
return(0); /* illegal view */ |
| 816 |
dev_view(&nv); |
| 817 |
inpresflags |= DFL(DC_SETVIEW); |
| 818 |
return(1); |
| 819 |
} |
| 820 |
|
| 821 |
|
| 822 |
static |
| 823 |
getmove(ebut) /* get view change */ |
| 824 |
XButtonPressedEvent *ebut; |
| 825 |
{ |
| 826 |
int movdir = MOVDIR(ebut->button); |
| 827 |
int movorb = MOVORB(ebut->state); |
| 828 |
Window rootw, childw; |
| 829 |
int rootx, rooty, wx, wy; |
| 830 |
unsigned int statemask; |
| 831 |
|
| 832 |
quicken = 1; /* accelerate update rate */ |
| 833 |
XNoOp(ourdisplay); |
| 834 |
|
| 835 |
while (!XCheckMaskEvent(ourdisplay, |
| 836 |
ButtonReleaseMask, levptr(XEvent))) { |
| 837 |
|
| 838 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 839 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 840 |
break; /* on another screen */ |
| 841 |
|
| 842 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 843 |
sleep(1); |
| 844 |
continue; |
| 845 |
} |
| 846 |
draw_grids(); |
| 847 |
dev_flush(); |
| 848 |
} |
| 849 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 850 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 851 |
wx = levptr(XButtonReleasedEvent)->x; |
| 852 |
wy = levptr(XButtonReleasedEvent)->y; |
| 853 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 854 |
} else { |
| 855 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 856 |
redraw(); |
| 857 |
} |
| 858 |
quicken = 0; |
| 859 |
dev_flush(); |
| 860 |
} |
| 861 |
|
| 862 |
|
| 863 |
static |
| 864 |
getkey(ekey) /* get input key */ |
| 865 |
register XKeyPressedEvent *ekey; |
| 866 |
{ |
| 867 |
int n; |
| 868 |
char buf[8]; |
| 869 |
|
| 870 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 871 |
if (n != 1) |
| 872 |
return; |
| 873 |
switch (buf[0]) { |
| 874 |
case 'h': /* turn on height motion lock */ |
| 875 |
headlocked = 1; |
| 876 |
return; |
| 877 |
case 'H': /* turn off height motion lock */ |
| 878 |
headlocked = 0; |
| 879 |
return; |
| 880 |
case 'l': /* retrieve last view */ |
| 881 |
inpresflags |= DFL(DC_LASTVIEW); |
| 882 |
return; |
| 883 |
case 'p': /* pause computation */ |
| 884 |
inpresflags |= DFL(DC_PAUSE); |
| 885 |
return; |
| 886 |
case 'v': /* spit out view */ |
| 887 |
inpresflags |= DFL(DC_GETVIEW); |
| 888 |
return; |
| 889 |
case '\n': |
| 890 |
case '\r': /* resume computation */ |
| 891 |
inpresflags |= DFL(DC_RESUME); |
| 892 |
return; |
| 893 |
case CTRL('R'): /* redraw screen */ |
| 894 |
TMapValues(1); |
| 895 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 896 |
redraw(); |
| 897 |
return; |
| 898 |
case CTRL('L'): /* refresh from server */ |
| 899 |
if (inpresflags & DFL(DC_REDRAW)) |
| 900 |
return; |
| 901 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 902 |
glDisable(GL_DEPTH_TEST); |
| 903 |
draw_grids(); |
| 904 |
glEnable(GL_DEPTH_TEST); |
| 905 |
glFlush(); |
| 906 |
Compost(100); /* get rid of old values */ |
| 907 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 908 |
return; |
| 909 |
case 'K': /* kill rtrace process(es) */ |
| 910 |
inpresflags |= DFL(DC_KILL); |
| 911 |
break; |
| 912 |
case 'R': /* restart rtrace */ |
| 913 |
inpresflags |= DFL(DC_RESTART); |
| 914 |
break; |
| 915 |
case 'C': /* clobber holodeck */ |
| 916 |
inpresflags |= DFL(DC_CLOBBER); |
| 917 |
break; |
| 918 |
case 'q': /* quit the program */ |
| 919 |
inpresflags |= DFL(DC_QUIT); |
| 920 |
return; |
| 921 |
default: |
| 922 |
XBell(ourdisplay, 0); |
| 923 |
return; |
| 924 |
} |
| 925 |
} |
| 926 |
|
| 927 |
|
| 928 |
static |
| 929 |
fixwindow(eexp) /* repair damage to window */ |
| 930 |
register XExposeEvent *eexp; |
| 931 |
{ |
| 932 |
if (odev.hres == 0 || odev.vres == 0) /* first exposure */ |
| 933 |
resizewindow((XConfigureEvent *)eexp); |
| 934 |
if (eexp->width == odev.hres && eexp->height == odev.vres) |
| 935 |
TMapValues(1); |
| 936 |
if (!eexp->count) { |
| 937 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 938 |
redraw(); |
| 939 |
} |
| 940 |
} |
| 941 |
|
| 942 |
|
| 943 |
static |
| 944 |
resizewindow(ersz) /* resize window */ |
| 945 |
register XConfigureEvent *ersz; |
| 946 |
{ |
| 947 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 948 |
return; |
| 949 |
|
| 950 |
odev.hres = ersz->width; |
| 951 |
odev.vres = ersz->height; |
| 952 |
|
| 953 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 954 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 955 |
|
| 956 |
setGLview(); |
| 957 |
|
| 958 |
inpresflags |= DFL(DC_SETVIEW); |
| 959 |
} |
