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/* Copyright (c) 1990 Regents of the University of California */ |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include "pic.h" |
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#include "x11raster.h" |
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#include "random.h" |
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#include "resolu.h" |
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#define FONTNAME "8x13" /* text font we'll use */ |
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COLR *scanline; /* scan line buffer */ |
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int xmax, ymax; /* picture resolution */ |
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RESOLU inpres; /* input resolution and ordering */ |
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int xmax, ymax; /* picture dimensions */ |
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int width, height; /* window size */ |
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char *fname = NULL; /* input file name */ |
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FILE *fin = stdin; /* input file */ |
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int wrongformat = 0; /* input in another format? */ |
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int imready = 0; /* is image up? */ |
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GC revgc; /* graphics context with GXinvert */ |
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XRASTER *ourras; /* our stored image */ |
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/* get header */ |
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getheader(fin, headline, NULL); |
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/* get picture dimensions */ |
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if (wrongformat || fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
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if (wrongformat || !fgetsresolu(&inpres, fin)) |
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quiterr("bad picture format"); |
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xmax = scanlen(&inpres); |
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ymax = numscans(&inpres); |
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/* set view parameters */ |
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if (gotview && setview(&ourview) != NULL) |
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gotview = 0; |
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XSetFunction(thedisplay, revgc, GXinvert); |
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XDefineCursor(thedisplay, wind, XCreateFontCursor(thedisplay, |
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XC_diamond_cross)); |
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XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
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if (geometry != NULL) { |
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bzero((char *)&oursizhints, sizeof(oursizhints)); |
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i = XParseGeometry(geometry, &oursizhints.x, &oursizhints.y, |
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|ButtonMotionMask|StructureNotifyMask |
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|KeyPressMask|ExposureMask); |
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XMapWindow(thedisplay, wind); |
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/* make sure the image is up */ |
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do |
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getevent(); |
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while (!imready); |
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/* store name as ready signal */ |
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XStoreName(thedisplay, wind, fname == NULL ? progname : fname); |
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return; |
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memerr: |
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quiterr("out of memory"); |
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break; |
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case Expose: |
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redraw(e.e.x, e.e.y, e.e.width, e.e.height); |
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imready++; |
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break; |
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case ButtonPress: |
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if (e.b.state & (ShiftMask|ControlMask)) |
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XColor cvx; |
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int com, n; |
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double comp; |
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FLOAT hv[2]; |
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FVECT rorg, rdir; |
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n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
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XStoreColor(thedisplay, ourras->cmap, &cvx); |
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return(0); |
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case 'p': /* position */ |
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sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
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pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
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sprintf(buf, "(%d,%d)", (int)(hv[0]*inpres.xr), |
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(int)(hv[1]*inpres.yr)); |
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XDrawImageString(thedisplay, wind, ourgc, ekey->x, ekey->y, |
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buf, strlen(buf)); |
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return(0); |
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XBell(thedisplay, 0); |
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return(-1); |
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} |
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if (viewray(rorg, rdir, &ourview, |
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(ekey->x-xoff+.5)/xmax, |
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(ymax-1-ekey->y+yoff+.5)/ymax) < 0) |
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pix2loc(hv, &inpres, ekey->x-xoff, ekey->y-yoff); |
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if (viewray(rorg, rdir, &ourview, hv[0], hv[1]) < 0) |
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return(-1); |
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printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
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printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
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avgbox(clr) /* average color over current box */ |
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COLOR clr; |
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{ |
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static COLOR lc; |
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static int ll, lr, lt, lb; |
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int left, right, top, bottom; |
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int y; |
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double d; |
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bottom = ymax; |
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if (top >= bottom) |
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return(-1); |
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if (left == ll && right == lr && top == lt && bottom == lb) { |
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copycolor(clr, lc); |
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return; |
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} |
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for (y = top; y < bottom; y++) { |
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if (getscan(y) == -1) |
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return(-1); |
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} |
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d = 1.0/((right-left)*(bottom-top)); |
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scalecolor(clr, d); |
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ll = left; lr = right; lt = top; lb = bottom; |
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copycolor(lc, clr); |
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return(0); |
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} |
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{ |
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register unsigned char *dp; |
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register int x, err; |
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int y; |
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int y, errp; |
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short *cerr; |
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if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
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for (x = 0; x < xmax; x++) { |
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if (!(x&7)) |
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*++dp = 0; |
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errp = err; |
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err += normbright(scanline[x]) + cerr[x]; |
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if (err > 127) |
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err -= 255; |
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else |
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*dp |= 1<<(7-(x&07)); |
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cerr[x] = err >>= 1; |
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err /= 3; |
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cerr[x] = err + errp; |
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} |
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} |
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free((char *)cerr); |
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static char *dp; |
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register int err; |
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register int x, ti; |
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int errp; |
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if (iconheight == 0) { /* initialize */ |
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if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
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} else if (xmax > ymax) { |
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iconwidth = ICONSIZ; |
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iconheight = ICONSIZ*ymax/xmax; |
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if (iconheight < 1) |
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iconheight = 1; |
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} else { |
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iconwidth = ICONSIZ*xmax/ymax; |
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if (iconwidth < 1) |
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iconwidth = 1; |
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iconheight = ICONSIZ; |
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} |
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ynext = 0; |
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for (x = 0; x < iconwidth; x++) { |
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if (!(x&7)) |
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*++dp = 0; |
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errp = err; |
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ti = x*xmax/iconwidth; |
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err += normbright(scan[ti]) + cerr[x]; |
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if (err > 127) |
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err -= 255; |
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else |
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*dp |= 1<<(x&07); |
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cerr[x] = err >>= 1; |
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err /= 3; |
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cerr[x] = err + errp; |
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} |
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ynext++; |
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} |