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greg |
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/* Copyright (c) 1987 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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#endif |
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/* |
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* ximage.c - driver for X-windows |
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* |
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* 4/30/87 |
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* 3/3/88 Added calls to xraster & Paul Heckbert's ciq routines |
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*/ |
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#include "standard.h" |
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#include <X/Xlib.h> |
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#include <X/cursors/bcross.cursor> |
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#include <X/cursors/bcross_mask.cursor> |
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#include <sys/types.h> |
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#include <ctype.h> |
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#include "color.h" |
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#include "xraster.h" |
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#include "view.h" |
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#include "pic.h" |
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#define controlshift(e) (((XButtonEvent *)(e))->detail & (ShiftMask|ControlMask)) |
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#define FONTNAME "9x15" /* text font we'll use */ |
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#define CTRL(c) ('c'-'@') |
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#define BORWIDTH 5 /* border width */ |
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#define BARHEIGHT 25 /* menu bar size */ |
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double gamcor = 2.0; /* gamcor correction */ |
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XRASTER ourras; /* our stored raster image */ |
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int dither = 1; /* dither colors? */ |
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int fast = 0; /* keep picture in Pixmap? */ |
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Window wind = 0; /* our output window */ |
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Font fontid; /* our font */ |
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int maxcolors = 0; /* maximum colors */ |
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int greyscale = 0; /* in grey */ |
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int xoff = 0; /* x image offset */ |
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int yoff = 0; /* y image offset */ |
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VIEW ourview = STDVIEW(0); /* image view parameters */ |
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int gotview = 0; /* got parameters from file */ |
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COLR *scanline; /* scan line buffer */ |
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int xmax, ymax; /* picture resolution */ |
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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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long *scanpos = NULL; /* scan line positions in file */ |
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int cury = 0; /* current scan location */ |
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double exposure = 1.0; /* exposure compensation used */ |
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struct { |
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int xmin, ymin, xsiz, ysiz; |
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} box = {0, 0, 0, 0}; /* current box */ |
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char *geometry = NULL; /* geometry specification */ |
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char *progname; |
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char errmsg[128]; |
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extern long ftell(); |
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extern char *malloc(), *calloc(); |
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extern double atof(); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int headline(); |
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int i; |
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progname = argv[0]; |
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'c': |
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maxcolors = atoi(argv[++i]); |
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break; |
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case 'b': |
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greyscale = !greyscale; |
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break; |
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case 'm': |
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maxcolors = 2; |
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break; |
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case 'd': |
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dither = !dither; |
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break; |
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case 'f': |
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fast = !fast; |
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break; |
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case 'g': |
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gamcor = atof(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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else if (argv[i][0] == '=') |
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geometry = argv[i]; |
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else |
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break; |
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| 126 |
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if (argc-i == 1) { |
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fname = argv[i]; |
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fin = fopen(fname, "r"); |
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if (fin == NULL) { |
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sprintf(errmsg, "can't open file \"%s\"", fname); |
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quiterr(errmsg); |
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} |
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} else |
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goto userr; |
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/* get header */ |
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getheader(fin, headline); |
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/* get picture dimensions */ |
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if (fscanf(fin, "-Y %d +X %d\n", &ymax, &xmax) != 2) |
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quiterr("bad picture size"); |
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/* set view parameters */ |
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if (gotview) { |
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ourview.hresolu = xmax; |
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ourview.vresolu = ymax; |
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if (setview(&ourview) != NULL) |
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gotview = 0; |
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} |
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if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
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quiterr("out of memory"); |
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init(); /* get file and open window */ |
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for ( ; ; ) |
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getevent(); /* main loop */ |
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userr: |
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fprintf(stderr, |
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"Usage: %s [=geometry][-b][-m][-d][-f][-c ncolors] file\n", |
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progname); |
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quit(1); |
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} |
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headline(s) /* get relevant info from header */ |
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char *s; |
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{ |
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static char *altname[] = {"rview","rpict","VIEW=",NULL}; |
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register char **an; |
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if (!strncmp(s, "EXPOSURE=", 9)) |
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exposure *= atof(s+9); |
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else |
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for (an = altname; *an != NULL; an++) |
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if (!strncmp(*an, s, strlen(*an))) { |
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if (sscanview(&ourview, s+strlen(*an)) == 0) |
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gotview++; |
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return; |
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} |
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} |
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char * |
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sskip(s) /* skip a word */ |
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register char *s; |
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{ |
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while (isspace(*s)) s++; |
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while (*s && !isspace(*s)) s++; |
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return(s); |
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} |
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init() /* get data and open window */ |
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{ |
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register int i; |
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colormap ourmap; |
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OpaqueFrame mainframe; |
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char defgeom[32]; |
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if (fname != NULL) { |
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scanpos = (long *)malloc(ymax*sizeof(long)); |
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if (scanpos == NULL) |
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goto memerr; |
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for (i = 0; i < ymax; i++) |
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scanpos[i] = -1; |
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} |
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if (XOpenDisplay(NULL) == NULL) |
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quiterr("can't open display; DISPLAY variable set?"); |
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#ifdef notdef |
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if (DisplayWidth() - 2*BORWIDTH < xmax || |
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DisplayHeight() - 2*BORWIDTH - BARHEIGHT < ymax) |
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quiterr("resolution mismatch"); |
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#endif |
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if (maxcolors == 0) { /* get number of available colors */ |
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maxcolors = 1<<DisplayPlanes(); |
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if (maxcolors > 4) maxcolors -= 2; |
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} |
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ourras.width = xmax; |
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ourras.height = ymax; |
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/* store image */ |
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if (maxcolors <= 2) { /* monochrome */ |
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ourras.data.m = (unsigned short *)malloc(BitmapSize(xmax,ymax)); |
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if (ourras.data.m == NULL) |
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goto memerr; |
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getmono(); |
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} else { |
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ourras.data.bz = (unsigned char *)malloc(BZPixmapSize(xmax,ymax)); |
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if (ourras.data.bz == NULL) |
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goto memerr; |
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if (greyscale) |
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biq(dither,maxcolors,1,ourmap); |
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else |
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ciq(dither,maxcolors,1,ourmap); |
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if (init_rcolors(&ourras, ourmap) == 0) |
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goto memerr; |
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} |
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mainframe.bdrwidth = BORWIDTH; |
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mainframe.border = WhitePixmap; |
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mainframe.background = BlackPixmap; |
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sprintf(defgeom, "=%dx%d+0+22", xmax, ymax); |
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wind = XCreate("Radiance Image", progname, geometry, defgeom, |
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&mainframe, 16, 16); |
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if (wind == 0) |
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quiterr("can't create window"); |
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width = mainframe.width; |
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height = mainframe.height; |
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fontid = XGetFont(FONTNAME); |
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if (fontid == 0) |
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quiterr("can't get font"); |
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XStoreName(wind, fname == NULL ? progname : fname); |
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XDefineCursor(wind, XCreateCursor(bcross_width, bcross_height, |
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bcross_bits, bcross_mask_bits, |
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bcross_x_hot, bcross_y_hot, |
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BlackPixel, WhitePixel, GXcopy)); |
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XSelectInput(wind, ButtonPressed|ButtonReleased|UnmapWindow |
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|RightDownMotion|MiddleDownMotion|LeftDownMotion |
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|KeyPressed|ExposeWindow|ExposeRegion); |
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XMapWindow(wind); |
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return; |
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memerr: |
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quiterr("out of memory"); |
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} |
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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if (err != NULL) |
| 267 |
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fprintf(stderr, "%s: %s\n", progname, err); |
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| 269 |
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exit(err == NULL ? 0 : 1); |
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} |
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eputs(s) |
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char *s; |
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{ |
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fputs(s, stderr); |
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} |
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quit(code) |
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int code; |
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{ |
| 283 |
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exit(code); |
| 284 |
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} |
| 285 |
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| 286 |
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| 287 |
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getevent() /* process the next event */ |
| 288 |
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{ |
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WindowInfo info; |
| 290 |
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XEvent e; |
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XNextEvent(&e); |
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switch (e.type) { |
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case KeyPressed: |
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docom(&e); |
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break; |
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case ExposeWindow: |
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XQueryWindow(wind, &info); /* in case resized */ |
| 299 |
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width = info.width; |
| 300 |
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height = info.height; |
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/* fall through */ |
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case ExposeRegion: |
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fixwindow(&e); |
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break; |
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case UnmapWindow: |
| 306 |
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unmap_rcolors(&ourras); |
| 307 |
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break; |
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case ButtonPressed: |
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if (controlshift(&e)) |
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moveimage(&e); |
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else |
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getbox(&e); |
| 313 |
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break; |
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} |
| 315 |
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} |
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| 318 |
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fixwindow(eexp) /* fix new or stepped-on window */ |
| 319 |
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XExposeEvent *eexp; |
| 320 |
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{ |
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redraw(eexp->x, eexp->y, eexp->width, eexp->height); |
| 322 |
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} |
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| 324 |
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| 325 |
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redraw(x, y, w, h) /* redraw section of window */ |
| 326 |
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int x, y; |
| 327 |
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int w, h; |
| 328 |
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{ |
| 329 |
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map_rcolors(&ourras); |
| 330 |
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if (fast) |
| 331 |
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make_rpixmap(&ourras); |
| 332 |
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return(patch_raster(wind,x-xoff,y-yoff,x,y,w,h,&ourras) ? 0 : -1); |
| 333 |
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} |
| 334 |
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| 335 |
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| 336 |
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docom(ekey) /* execute command */ |
| 337 |
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XKeyEvent *ekey; |
| 338 |
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{ |
| 339 |
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char buf[80]; |
| 340 |
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COLOR cval; |
| 341 |
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char *cp; |
| 342 |
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int n; |
| 343 |
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FVECT rorg, rdir; |
| 344 |
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| 345 |
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cp = XLookupMapping(ekey, &n); |
| 346 |
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if (n == 0) |
| 347 |
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return(0); |
| 348 |
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switch (*cp) { /* interpret command */ |
| 349 |
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case 'q': |
| 350 |
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case CTRL(D): /* quiterr */ |
| 351 |
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quit(0); |
| 352 |
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case '\n': |
| 353 |
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case '\r': |
| 354 |
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case 'l': |
| 355 |
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case 'c': /* value */ |
| 356 |
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if (avgbox(cval) == -1) |
| 357 |
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return(-1); |
| 358 |
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switch (*cp) { |
| 359 |
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case '\n': |
| 360 |
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case '\r': /* radiance */ |
| 361 |
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sprintf(buf, "%-3g", intens(cval)/exposure); |
| 362 |
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break; |
| 363 |
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case 'l': /* luminance */ |
| 364 |
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sprintf(buf, "%-3gL", bright(cval)*683.0/exposure); |
| 365 |
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break; |
| 366 |
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case 'c': /* color */ |
| 367 |
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sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 368 |
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colval(cval,RED), |
| 369 |
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colval(cval,GRN), |
| 370 |
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colval(cval,BLU)); |
| 371 |
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break; |
| 372 |
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} |
| 373 |
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XText(wind, box.xmin, box.ymin, buf, strlen(buf), |
| 374 |
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fontid, BlackPixel, WhitePixel); |
| 375 |
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return(0); |
| 376 |
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case 'p': /* position */ |
| 377 |
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sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff); |
| 378 |
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XText(wind, ekey->x, ekey->y, buf, strlen(buf), |
| 379 |
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fontid, BlackPixel, WhitePixel); |
| 380 |
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return(0); |
| 381 |
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case 't': /* trace */ |
| 382 |
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if (!gotview) { |
| 383 |
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XFeep(0); |
| 384 |
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return(-1); |
| 385 |
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} |
| 386 |
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rayview(rorg, rdir, &ourview, |
| 387 |
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ekey->x-xoff + .5, ymax-1-ekey->y+yoff + .5); |
| 388 |
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printf("%e %e %e ", rorg[0], rorg[1], rorg[2]); |
| 389 |
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printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]); |
| 390 |
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fflush(stdout); |
| 391 |
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return(0); |
| 392 |
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case CTRL(R): /* redraw */ |
| 393 |
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XClear(wind); |
| 394 |
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return(redraw(0, 0, width, height)); |
| 395 |
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case ' ': /* clear */ |
| 396 |
|
|
return(redraw(box.xmin, box.ymin, box.xsiz, box.ysiz)); |
| 397 |
|
|
default: |
| 398 |
|
|
XFeep(0); |
| 399 |
|
|
return(-1); |
| 400 |
|
|
} |
| 401 |
|
|
} |
| 402 |
|
|
|
| 403 |
|
|
|
| 404 |
|
|
moveimage(ep) /* shift the image */ |
| 405 |
|
|
XButtonEvent *ep; |
| 406 |
|
|
{ |
| 407 |
|
|
XButtonEvent eb; |
| 408 |
|
|
|
| 409 |
|
|
XMaskEvent(ButtonReleased, &eb); |
| 410 |
|
|
xoff += eb.x - ep->x; |
| 411 |
|
|
yoff += eb.y - ep->y; |
| 412 |
|
|
XClear(wind); |
| 413 |
|
|
return(redraw(0, 0, width, height)); |
| 414 |
|
|
} |
| 415 |
|
|
|
| 416 |
|
|
|
| 417 |
|
|
getbox(ebut) /* get new box */ |
| 418 |
|
|
XButtonEvent *ebut; |
| 419 |
|
|
{ |
| 420 |
|
|
union { |
| 421 |
|
|
XEvent e; |
| 422 |
|
|
XButtonEvent b; |
| 423 |
|
|
XMouseMovedEvent m; |
| 424 |
|
|
} e; |
| 425 |
|
|
|
| 426 |
|
|
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
| 427 |
|
|
while (e.e.type == MouseMoved) { |
| 428 |
|
|
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y); |
| 429 |
|
|
XMaskEvent(ButtonReleased|MouseMoved, &e.e); |
| 430 |
|
|
revbox(ebut->x, ebut->y, box.xmin, box.ymin); |
| 431 |
|
|
} |
| 432 |
|
|
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x); |
| 433 |
|
|
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y); |
| 434 |
|
|
if (box.xmin > ebut->x) { |
| 435 |
|
|
box.xsiz = box.xmin - ebut->x + 1; |
| 436 |
|
|
box.xmin = ebut->x; |
| 437 |
|
|
} else { |
| 438 |
|
|
box.xsiz = ebut->x - box.xmin + 1; |
| 439 |
|
|
} |
| 440 |
|
|
if (box.ymin > ebut->y) { |
| 441 |
|
|
box.ysiz = box.ymin - ebut->y + 1; |
| 442 |
|
|
box.ymin = ebut->y; |
| 443 |
|
|
} else { |
| 444 |
|
|
box.ysiz = ebut->y - box.ymin + 1; |
| 445 |
|
|
} |
| 446 |
|
|
} |
| 447 |
|
|
|
| 448 |
|
|
|
| 449 |
|
|
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 450 |
|
|
int x0, y0, x1, y1; |
| 451 |
|
|
{ |
| 452 |
|
|
XLine(wind, x0, y0, x1, y0, 1, 1, 0, GXinvert, AllPlanes); |
| 453 |
|
|
XLine(wind, x0, y1, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 454 |
|
|
XLine(wind, x0, y0, x0, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 455 |
|
|
XLine(wind, x1, y0, x1, y1, 1, 1, 0, GXinvert, AllPlanes); |
| 456 |
|
|
} |
| 457 |
|
|
|
| 458 |
|
|
|
| 459 |
|
|
avgbox(clr) /* average color over current box */ |
| 460 |
|
|
COLOR clr; |
| 461 |
|
|
{ |
| 462 |
|
|
int left, right, top, bottom; |
| 463 |
|
|
int y; |
| 464 |
|
|
double d; |
| 465 |
|
|
COLOR ctmp; |
| 466 |
|
|
register int x; |
| 467 |
|
|
|
| 468 |
|
|
setcolor(clr, 0.0, 0.0, 0.0); |
| 469 |
|
|
left = box.xmin - xoff; |
| 470 |
|
|
right = left + box.xsiz; |
| 471 |
|
|
if (left < 0) |
| 472 |
|
|
left = 0; |
| 473 |
|
|
if (right > xmax) |
| 474 |
|
|
right = xmax; |
| 475 |
|
|
if (left >= right) |
| 476 |
|
|
return(-1); |
| 477 |
|
|
top = box.ymin - yoff; |
| 478 |
|
|
bottom = top + box.ysiz; |
| 479 |
|
|
if (top < 0) |
| 480 |
|
|
top = 0; |
| 481 |
|
|
if (bottom > ymax) |
| 482 |
|
|
bottom = ymax; |
| 483 |
|
|
if (top >= bottom) |
| 484 |
|
|
return(-1); |
| 485 |
|
|
for (y = top; y < bottom; y++) { |
| 486 |
|
|
if (getscan(y) == -1) |
| 487 |
|
|
return(-1); |
| 488 |
|
|
for (x = left; x < right; x++) { |
| 489 |
|
|
colr_color(ctmp, scanline[x]); |
| 490 |
|
|
addcolor(clr, ctmp); |
| 491 |
|
|
} |
| 492 |
|
|
} |
| 493 |
|
|
d = 1.0/((right-left)*(bottom-top)); |
| 494 |
|
|
scalecolor(clr, d); |
| 495 |
|
|
return(0); |
| 496 |
|
|
} |
| 497 |
|
|
|
| 498 |
|
|
|
| 499 |
|
|
getmono() /* get monochrome data */ |
| 500 |
|
|
{ |
| 501 |
|
|
register unsigned short *dp; |
| 502 |
|
|
register int x, err; |
| 503 |
|
|
int y; |
| 504 |
|
|
rgbpixel *inline; |
| 505 |
|
|
short *cerr; |
| 506 |
|
|
|
| 507 |
|
|
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL |
| 508 |
|
|
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL) |
| 509 |
|
|
quit("out of memory in getmono"); |
| 510 |
|
|
dp = ourras.data.m - 1; |
| 511 |
|
|
for (y = 0; y < ymax; y++) { |
| 512 |
|
|
picreadline3(y, inline); |
| 513 |
|
|
err = 0; |
| 514 |
|
|
for (x = 0; x < xmax; x++) { |
| 515 |
|
|
if (!(x&0xf)) |
| 516 |
|
|
*++dp = 0; |
| 517 |
|
|
err += rgb_bright(&inline[x]) + cerr[x]; |
| 518 |
|
|
if (err > 127) |
| 519 |
|
|
err -= 255; |
| 520 |
|
|
else |
| 521 |
|
|
*dp |= 1<<(x&0xf); |
| 522 |
|
|
cerr[x] = err >>= 1; |
| 523 |
|
|
} |
| 524 |
|
|
} |
| 525 |
|
|
free((char *)inline); |
| 526 |
|
|
free((char *)cerr); |
| 527 |
|
|
} |
| 528 |
|
|
|
| 529 |
|
|
|
| 530 |
|
|
init_rcolors(xr, cmap) /* assign color values */ |
| 531 |
|
|
register XRASTER *xr; |
| 532 |
|
|
colormap cmap; |
| 533 |
|
|
{ |
| 534 |
|
|
register int i; |
| 535 |
|
|
register unsigned char *p; |
| 536 |
|
|
|
| 537 |
|
|
xr->pmap = (int *)malloc(256*sizeof(int)); |
| 538 |
|
|
if (xr->pmap == NULL) |
| 539 |
|
|
return(0); |
| 540 |
|
|
xr->cdefs = (Color *)malloc(256*sizeof(Color)); |
| 541 |
|
|
if (xr->cdefs == NULL) |
| 542 |
|
|
return(0); |
| 543 |
|
|
for (i = 0; i < 256; i++) |
| 544 |
|
|
xr->pmap[i] = -1; |
| 545 |
|
|
xr->ncolors = 0; |
| 546 |
|
|
for (p = xr->data.bz, i = BZPixmapSize(xr->width,xr->height); i--; p++) |
| 547 |
|
|
if (xr->pmap[*p] == -1) { |
| 548 |
|
|
xr->cdefs[xr->ncolors].red = cmap[0][*p] << 8; |
| 549 |
|
|
xr->cdefs[xr->ncolors].green = cmap[1][*p] << 8; |
| 550 |
|
|
xr->cdefs[xr->ncolors].blue = cmap[2][*p] << 8; |
| 551 |
|
|
xr->cdefs[xr->ncolors].pixel = *p; |
| 552 |
|
|
xr->pmap[*p] = xr->ncolors++; |
| 553 |
|
|
} |
| 554 |
|
|
xr->cdefs = (Color *)realloc((char *)xr->cdefs, xr->ncolors*sizeof(Color)); |
| 555 |
|
|
if (xr->cdefs == NULL) |
| 556 |
|
|
return(0); |
| 557 |
|
|
return(1); |
| 558 |
|
|
} |
| 559 |
|
|
|
| 560 |
|
|
|
| 561 |
|
|
getscan(y) |
| 562 |
|
|
int y; |
| 563 |
|
|
{ |
| 564 |
|
|
if (y != cury) { |
| 565 |
|
|
if (scanpos == NULL || scanpos[y] == -1) |
| 566 |
|
|
return(-1); |
| 567 |
|
|
if (fseek(fin, scanpos[y], 0) == -1) |
| 568 |
|
|
quit("fseek error"); |
| 569 |
|
|
cury = y; |
| 570 |
|
|
} else if (scanpos != NULL) |
| 571 |
|
|
scanpos[y] = ftell(fin); |
| 572 |
|
|
|
| 573 |
|
|
if (freadcolrs(scanline, xmax, fin) < 0) |
| 574 |
|
|
quiterr("read error"); |
| 575 |
|
|
|
| 576 |
|
|
cury++; |
| 577 |
|
|
return(0); |
| 578 |
|
|
} |
| 579 |
|
|
|
| 580 |
|
|
|
| 581 |
|
|
picreadline3(y, l3) /* read in 3-byte scanline */ |
| 582 |
|
|
int y; |
| 583 |
|
|
register rgbpixel *l3; |
| 584 |
|
|
{ |
| 585 |
|
|
register BYTE *l4; |
| 586 |
|
|
register int shift, c; |
| 587 |
|
|
int i; |
| 588 |
|
|
|
| 589 |
|
|
if (getscan(y) < 0) |
| 590 |
|
|
quiterr("cannot seek for picreadline"); |
| 591 |
|
|
/* convert scanline */ |
| 592 |
|
|
for (l4=scanline[0], i=xmax; i--; l4+=4, l3++) { |
| 593 |
|
|
shift = l4[EXP] - COLXS; |
| 594 |
|
|
if (shift >= 8) { |
| 595 |
|
|
l3->r = l3->g = l3->b = 255; |
| 596 |
|
|
} else if (shift <= -8) { |
| 597 |
|
|
l3->r = l3->g = l3->b = 0; |
| 598 |
|
|
} else if (shift > 0) { |
| 599 |
|
|
c = l4[RED] << shift; |
| 600 |
|
|
l3->r = c > 255 ? 255 : c; |
| 601 |
|
|
c = l4[GRN] << shift; |
| 602 |
|
|
l3->g = c > 255 ? 255 : c; |
| 603 |
|
|
c = l4[BLU] << shift; |
| 604 |
|
|
l3->b = c > 255 ? 255 : c; |
| 605 |
|
|
} else if (shift < 0) { |
| 606 |
|
|
l3->r = l4[RED] >> -shift; |
| 607 |
|
|
l3->g = l4[GRN] >> -shift; |
| 608 |
|
|
l3->b = l4[BLU] >> -shift; |
| 609 |
|
|
} else { |
| 610 |
|
|
l3->r = l4[RED]; |
| 611 |
|
|
l3->g = l4[GRN]; |
| 612 |
|
|
l3->b = l4[BLU]; |
| 613 |
|
|
} |
| 614 |
|
|
} |
| 615 |
|
|
} |
| 616 |
|
|
|
| 617 |
|
|
|
| 618 |
|
|
picwriteline(y, l) /* add 8-bit scanline to image */ |
| 619 |
|
|
int y; |
| 620 |
|
|
pixel *l; |
| 621 |
|
|
{ |
| 622 |
|
|
bcopy(l, ourras.data.bz+BZPixmapSize(xmax,y), BZPixmapSize(xmax,1)); |
| 623 |
|
|
} |
| 624 |
|
|
|
| 625 |
|
|
|
| 626 |
|
|
picreadcm(map) /* do gamcor correction */ |
| 627 |
|
|
colormap map; |
| 628 |
|
|
{ |
| 629 |
|
|
extern double pow(); |
| 630 |
|
|
register int i, val; |
| 631 |
|
|
|
| 632 |
|
|
for (i = 0; i < 256; i++) { |
| 633 |
|
|
val = pow(i/256.0, 1.0/gamcor) * 256.0; |
| 634 |
|
|
map[0][i] = map[1][i] = map[2][i] = val; |
| 635 |
|
|
} |
| 636 |
|
|
} |
| 637 |
|
|
|
| 638 |
|
|
|
| 639 |
|
|
picwritecm(map) /* handled elsewhere */ |
| 640 |
|
|
colormap map; |
| 641 |
|
|
{ |
| 642 |
|
|
} |
